class method - Page 247

What does this signature mean(&) in PHP?

- by user198729

public function & get($name, $default = null) Why &?

Use of .apply() with 'new' operator. Is this possible?

In JavaScript, I want to create an object instance (via the new operator), but pass an arbitrary number of arguments to the constructor. Is this possible? What I want to do is something like this (but the code below does not work): function Something(){ // init stuff } function createSomething(){ return new Something.apply(null, arguments); } var s = createSomething(a,b,c); // 's' is an instance of Something The Answer From the responses here, it became clear that there's no in-built way to call .apply() with the new operator. However, people suggested a number of really interesting solutions to the problem. My preferred solution was this one from Matthew Crumley (I've modified it to pass the arguments property): var createSomething = (function() { function F(args) { return Something.apply(this, args); } F.prototype = Something.prototype; return function() { return new F(arguments); } })();

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C# serial port driver wrapper class code and concept quality

- by Ruben Trancoso

Hi folks, Would like to know from all you guys what you think about my Serial Wrapper class. Had be a while I've beem working with serial port but never shared the code what somekind make closed to my very own vision. Would like to know if it's a good/bad approach, if the interface is enough and what more you see on it. I know that Stackoverflow is for question but at the same time there's a lot of very good skilled people here and share code and opinion can also bennefit everybody, it's why I decided to post it anyway. thanks! using System.Text; using System.IO; using System.IO.Ports; using System; namespace Driver { class SerialSingleton { // The singleton instance reference private static SerialSingleton instance = null; // System's serial port interface private SerialPort serial; // Current com port identifier private string comPort = null; // Configuration parameters private int confBaudRate; private int confDataBits; private StopBits confStopBits; private Parity confParityControl; ASCIIEncoding encoding = new ASCIIEncoding(); // ================================================================================== // Constructors public static SerialSingleton getInstance() { if (instance == null) { instance = new SerialSingleton(); } return instance; } private SerialSingleton() { serial = new SerialPort(); } // =================================================================================== // Setup Methods public string ComPort { get { return comPort; } set { if (value == null) { throw new SerialException("Serial port name canot be null."); } if (nameIsComm(value)) { close(); comPort = value; } else { throw new SerialException("Serial Port '" + value + "' is not a valid com port."); } } } public void setSerial(string baudRate, int dataBits, StopBits stopBits, Parity parityControl) { if (baudRate == null) { throw new SerialException("Baud rate cannot be null"); } string[] baudRateRef = { "300", "600", "1200", "1800", "2400", "3600", "4800", "7200", "9600", "14400", "19200", "28800", "38400", "57600", "115200" }; int confBaudRate; if (findString(baudRateRef, baudRate) != -1) { confBaudRate = System.Convert.ToInt32(baudRate); } else { throw new SerialException("Baurate parameter invalid."); } int confDataBits; switch (dataBits) { case 5: confDataBits = 5; break; case 6: confDataBits = 6; break; case 7: confDataBits = 7; break; case 8: confDataBits = 8; break; default: throw new SerialException("Databits parameter invalid"); } if (stopBits == StopBits.None) { throw new SerialException("StopBits parameter cannot be NONE"); } this.confBaudRate = confBaudRate; this.confDataBits = confDataBits; this.confStopBits = stopBits; this.confParityControl = parityControl; } // ================================================================================== public string[] PortList { get { return SerialPort.GetPortNames(); } } public int PortCount { get { return SerialPort.GetPortNames().Length; } } // ================================================================================== // Open/Close Methods public void open() { open(comPort); } private void open(string comPort) { if (isOpen()) { throw new SerialException("Serial Port is Already open"); } else { if (comPort == null) { throw new SerialException("Serial Port not defined. Cannot open"); } bool found = false; if (nameIsComm(comPort)) { string portId; string[] portList = SerialPort.GetPortNames(); for (int i = 0; i < portList.Length; i++) { portId = (portList[i]); if (portId.Equals(comPort)) { found = true; break; } } } else { throw new SerialException("The com port identifier '" + comPort + "' is not a valid serial port identifier"); } if (!found) { throw new SerialException("Serial port '" + comPort + "' not found"); } serial.PortName = comPort; try { serial.Open(); } catch (UnauthorizedAccessException uaex) { throw new SerialException("Cannot open a serial port in use by another application", uaex); } try { serial.BaudRate = confBaudRate; serial.DataBits = confDataBits; serial.Parity = confParityControl; serial.StopBits = confStopBits; } catch (Exception e) { throw new SerialException("Serial port parameter invalid for '" + comPort + "'.\n" + e.Message, e); } } } public void close() { if (serial.IsOpen) { serial.Close(); } } // =================================================================================== // Auxiliary private Methods private int findString(string[] set, string search) { if (set != null) { for (int i = 0; i < set.Length; i++) { if (set[i].Equals(search)) { return i; } } } return -1; } private bool nameIsComm(string name) { int comNumber; int.TryParse(name.Substring(3), out comNumber); if (name.Substring(0, 3).Equals("COM")) { if (comNumber > -1 && comNumber < 256) { return true; } } return false; } // ================================================================================= // Device state Methods public bool isOpen() { return serial.IsOpen; } public bool hasData() { int amount = serial.BytesToRead; if (amount > 0) { return true; } else { return false; } } // ================================================================================== // Input Methods public char getChar() { int data = serial.ReadByte(); return (char)data; } public int getBytes(ref byte[] b) { int size = b.Length; char c; int counter = 0; for (counter = 0; counter < size; counter++) { if (tryGetChar(out c)) { b[counter] = (byte)c; } else { break; } } return counter; } public string getStringUntil(char x) { char c; string response = ""; while (tryGetChar(out c)) { response = response + c; if (c == x) { break; } } return response; } public bool tryGetChar(out char c) { c = (char)0x00; byte[] b = new byte[1]; long to = 10; long ft = System.Environment.TickCount + to; while (System.Environment.TickCount < ft) { if (hasData()) { int data = serial.ReadByte(); c = (char)data; return true; } } return false; } // ================================================================================ // Output Methods public void sendString(string data) { byte[] bytes = encoding.GetBytes(data); serial.Write(bytes, 0, bytes.Length); } public void sendChar(char c) { char[] data = new char[1]; data[0] = c; serial.Write(data, 0, 1); } public void sendBytes(byte[] data) { serial.Write(data, 0, data.Length); } public void clearBuffer() { if (serial.IsOpen) { serial.DiscardInBuffer(); serial.DiscardOutBuffer(); } } } }

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friending istream operator with class

- by user1388172

hello i'm trying to overload my operator >> to my class but i ecnouter an error in eclipse. code: friend istream& operator>>(const istream& is, const RAngle& ra){ return is >> ra.x >> ra.y; } code2: friend istream& operator>>(const istream& is, const RAngle& ra) { is >> ra.x; is >> ra.y; return is } Both crash and i don't know why, please help. EDIT: ra.x & ra.y are both 2 private ints of my class; Full error: error: ..\/rightangle.h: In function 'std::istream& operator>>(std::istream&, const RAngle&)': ..\/rightangle.h:65:12: error: ambiguous overload for 'operator>>' in 'is >> ra.RAngle::x' ..\/rightangle.h:65:12: note: candidates are: c:\mingw\bin\../lib/gcc/mingw32/4.6.1/include/c++/istream:122:7: note: std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(std::basic_istream<_CharT, _Traits>::__istream_type& (*)(std::basic_istream<_CharT, _Traits>::__istream_type&)) [with _CharT = char, _Traits = std::char_traits<char>, std::basic_istream<_CharT, _Traits>::__istream_type = std::basic_istream<char>] <near match> c:\mingw\bin\../lib/gcc/mingw32/4.6.1/include/c++/istream:122:7: note: no known conversion for argument 1 from 'const int' to 'std::basic_istream<char>::__istream_type& (*)(std::basic_istream<char>::__istream_type&) {aka std::basic_istream<char>& (*)(std::basic_istream<char>&)}' c:\mingw\bin\../lib/gcc/mingw32/4.6.1/include/c++/istream:126:7: note: std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(std::basic_istream<_CharT, _Traits>::__ios_type& (*)(std::basic_istream<_CharT, _Traits>::__ios_type&)) [with _CharT = char, _Traits = std::char_traits<char>, std::basic_istream<_CharT, _Traits>::__istream_type = std::basic_istream<char>, std::basic_istream<_CharT, _Traits>::__ios_type = std::basic_ios<char>] <near match> c:\mingw\bin\../lib/gcc/mingw32/4.6.1/include/c++/istream:126:7: note: no known conversion for argument 1 from 'const int' to 'std::basic_istream<char>::__ios_type& (*)(std::basic_istream<char>::__ios_type&) {aka std::basic_ios<char>& (*)(std::basic_ios<char>&)}' c:\mingw\bin\../lib/gcc/mingw32/4.6.1/include/c++/istream:133:7: note: std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(std::ios_base& (*)(std::ios_base&)) [with _CharT = char, _Traits = std::char_traits<char>, std::basic_istream<_CharT, _Traits>::__istream_type = std::basic_istream<char>] <near match> c:\mingw\bin\../lib/gcc/mingw32/4.6.1/include/c++/istream:133:7: note: no known conversion for argument 1 from 'const int' to 'std::ios_base& (*)(std::ios_base&)' c:\mingw\bin\../lib/gcc/mingw32/4.6.1/include/c++/istream:241:7: note: std::basic_istream<_CharT, _Traits>& std::basic_istream<_CharT, _Traits>::operator>>(std::basic_istream<_CharT, _Traits>::__streambuf_type*) [with _CharT = char, _Traits = std::char_traits<char>, std::basic_istream<_CharT, _Traits>::__streambuf_type = std::basic_streambuf<char>] <near match> c:\mingw\bin\../lib/gcc/mingw32/4.6.1/include/c++/istream:241:7: note: no known conversion for argument 1 from 'const int' to 'std::basic_istream<char>::__streambuf_type* {aka std::basic_streambuf<char>*}' ..\/rightangle.h:66:12: error: ambiguous overload for 'operator>>' in 'is >> ra.RAngle::y' ..\/rightangle.h:66:12: note: candidates are: c:\mingw\bin\../lib/gcc/mingw32/4.6.1/include/c++/istream:122:7: note: std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(std::basic_istream<_CharT, _Traits>::__istream_type& (*)(std::basic_istream<_CharT, _Traits>::__istream_type&)) [with _CharT = char, _Traits = std::char_traits<char>, std::basic_istream<_CharT, _Traits>::__istream_type = std::basic_istream<char>] <near match> c:\mingw\bin\../lib/gcc/mingw32/4.6.1/include/c++/istream:122:7: note: no known conversion for argument 1 from 'const int' to 'std::basic_istream<char>::__istream_type& (*)(std::basic_istream<char>::__istream_type&) {aka std::basic_istream<char>& (*)(std::basic_istream<char>&)}' c:\mingw\bin\../lib/gcc/mingw32/4.6.1/include/c++/istream:126:7: note: std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(std::basic_istream<_CharT, _Traits>::__ios_type& (*)(std::basic_istream<_CharT, _Traits>::__ios_type&)) [with _CharT = char, _Traits = std::char_traits<char>, std::basic_istream<_CharT, _Traits>::__istream_type = std::basic_istream<char>, std::basic_istream<_CharT, _Traits>::__ios_type = std::basic_ios<char>] <near match> c:\mingw\bin\../lib/gcc/mingw32/4.6.1/include/c++/istream:126:7: note: no known conversion for argument 1 from 'const int' to 'std::basic_istream<char>::__ios_type& (*)(std::basic_istream<char>::__ios_type&) {aka std::basic_ios<char>& (*)(std::basic_ios<char>&)}' c:\mingw\bin\../lib/gcc/mingw32/4.6.1/include/c++/istream:133:7: note: std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(std::ios_base& (*)(std::ios_base&)) [with _CharT = char, _Traits = std::char_traits<char>, std::basic_istream<_CharT, _Traits>::__istream_type = std::basic_istream<char>] <near match> c:\mingw\bin\../lib/gcc/mingw32/4.6.1/include/c++/istream:133:7: note: no known conversion for argument 1 from 'const int' to 'std::ios_base& (*)(std::ios_base&)' c:\mingw\bin\../lib/gcc/mingw32/4.6.1/include/c++/istream:241:7: note: std::basic_istream<_CharT, _Traits>& std::basic_istream<_CharT, _Traits>::operator>>(std::basic_istream<_CharT, _Traits>::__streambuf_type*) [with _CharT = char, _Traits = std::char_traits<char>, std::basic_istream<_CharT, _Traits>::__streambuf_type = std::basic_streambuf<char>] <near match> c:\mingw\bin\../lib/gcc/mingw32/4.6.1/include/c++/istream:241:7: note: no known conversion for argument 1 from 'const int' to 'std::basic_istream<char>::__streambuf_type* {aka std::basic_streambuf<char>*}''

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Windows Azure Root CAs and SSL Client Certificates

- by Your DisplayName here!

I ran into some problems while trying to make SSL client certificates work for StarterSTS 1.5. In theory you have to do two things (via startup tasks): Unlock the SSL section in IIS Install all the root certificates for the client certs you want to accept I did that. But it still does not work. While inspecting the event log, I stumbled over an schannel error message that I’ve never seen before: “When asking for client authentication, this server sends a list of trusted certificate authorities to the client. The client uses this list to choose a client certificate that is trusted by the server. Currently, this server trusts so many certificate authorities that the list has grown too long. This list has thus been truncated. The administrator of this machine should review the certificate authorities trusted for client authentication and remove those that do not really need to be trusted.” WTF? And indeed standard Azure (web role) VMs trust 275 root CAs (see attached list). Including kinda obscure ones. I don’t really know why MS made this design decision. It seems just wrong (including breaking the SSL client cert functionality). Deleting like 60% of them made SSL client certs from my CA work. So I guess I now have to find an automated way to attach CTLs to my site…joy. Exported list of trusted CA (as of 30th Dec 2010) AC Raíz Certicámara S.A. (4/2/2030 9:42:02 PM) AC RAIZ FNMT-RCM (1/1/2030 12:00:00 AM) A-CERT ADVANCED (10/23/2011 2:14:14 PM) Actalis Authentication CA G1 (6/25/2022 2:06:00 PM) Agence Nationale de Certification Electronique (8/12/2037 9:03:17 AM) Agence Nationale de Certification Electronique (8/12/2037 9:58:14 AM) Agencia Catalana de Certificacio (NIF Q-0801176-I) (1/7/2031 10:59:59 PM) America Online Root Certification Authority 1 (11/19/2037 8:43:00 PM) America Online Root Certification Authority 2 (9/29/2037 2:08:00 PM) ANCERT Certificados CGN (2/11/2024 5:27:12 PM) ANCERT Certificados Notariales (2/11/2024 3:58:26 PM) ANCERT Corporaciones de Derecho Publico (2/11/2024 5:22:45 PM) A-Trust-nQual-01 (11/30/2014 11:00:00 PM) A-Trust-nQual-03 (8/17/2015 10:00:00 PM) A-Trust-Qual-01 (11/30/2014 11:00:00 PM) A-Trust-Qual-02 (12/2/2014 11:00:00 PM) A-Trust-Qual-03a (4/24/2018 10:00:00 PM) Austria Telekom-Control Kommission (9/24/2005 12:40:00 PM) Austrian Society for Data Protection (2/12/2009 11:30:30 AM) Austrian Society for Data Protection GLOBALTRUST Certification Service (9/18/2036 2:12:35 PM) Autoridad Certificadora Raiz de la Secretaria de Economia (5/9/2025 12:00:00 AM) Autoridad de Certificacion de la Abogacia (6/13/2030 10:00:00 PM) Autoridad de Certificacion Firmaprofesional CIF A62634068 (10/24/2013 10:00:00 PM) Autoridade Certificadora Raiz Brasileira (11/30/2011 11:59:00 PM) Baltimore CyberTrust Root (5/12/2025 11:59:00 PM) BIT AdminCA-CD-T01 (1/25/2016 12:36:19 PM) BIT Admin-Root-CA (11/10/2021 7:51:07 AM) Buypass Class 2 CA 1 (10/13/2016 10:25:09 AM) Buypass Class 3 CA 1 (5/9/2015 2:13:03 PM) CA Disig (3/22/2016 1:39:34 AM) CertEurope (3/27/2037 11:00:00 PM) CERTICAMARA S.A. (2/23/2015 5:10:37 PM) Certicámara S.A. (5/23/2011 10:00:00 PM) Certigna (6/29/2027 3:13:05 PM) Certipost E-Trust Primary Normalised CA (7/26/2020 10:00:00 AM) Certipost E-Trust Primary Qualified CA (7/26/2020 10:00:00 AM) Certipost E-Trust Primary TOP Root CA (7/26/2025 10:00:00 AM) Certisign Autoridade Certificadora AC1S (6/27/2018 12:00:00 AM) Certisign Autoridade Certificadora AC2 (6/27/2018 12:00:00 AM) Certisign Autoridade Certificadora AC3S (7/9/2018 8:56:32 PM) Certisign Autoridade Certificadora AC4 (6/27/2018 12:00:00 AM) CertPlus Class 1 Primary CA (7/6/2020 11:59:59 PM) CertPlus Class 2 Primary CA (7/6/2019 11:59:59 PM) CertPlus Class 3 Primary CA (7/6/2019 11:59:59 PM) CertPlus Class 3P Primary CA (7/6/2019 11:59:59 PM) CertPlus Class 3TS Primary CA (7/6/2019 11:59:59 PM) CertRSA01 (3/3/2010 2:59:59 PM) certSIGN Root CA (7/4/2031 5:20:04 PM) Certum (6/11/2027 10:46:39 AM) Certum Trusted Network CA (12/31/2029 12:07:37 PM) Chambers of Commerce Root - 2008 (7/31/2038 12:29:50 PM) Chambersign Chambers of Commerce Root (9/30/2037 4:13:44 PM) Chambersign Global Root (9/30/2037 4:14:18 PM) Chambersign Public Notary Root (9/30/2037 4:14:49 PM) Chunghwa Telecom Co. Ltd. (12/20/2034 2:31:27 AM) Cisco Systems (5/14/2029 8:25:42 PM) CNNIC Root (4/16/2027 7:09:14 AM) Common Policy (10/15/2027 4:08:00 PM) COMODO (12/31/2028 11:59:59 PM) COMODO (1/18/2038 11:59:59 PM) COMODO (12/31/2029 11:59:59 PM) ComSign Advanced Security CA (3/24/2029 9:55:55 PM) ComSign CA (3/19/2029 3:02:18 PM) ComSign Secured CA (3/16/2029 3:04:56 PM) Correo Uruguayo - Root CA (12/31/2030 2:59:59 AM) Cybertrust Global Root (12/15/2021 8:00:00 AM) DanID (2/11/2037 9:09:30 AM) DanID (4/5/2021 5:03:17 PM) Deutsche Telekom Root CA 2 (7/9/2019 11:59:00 PM) DigiCert (11/10/2031 12:00:00 AM) DigiCert (11/10/2031 12:00:00 AM) DigiCert (11/10/2031 12:00:00 AM) DigiNotar Root CA (3/31/2025 6:19:21 PM) DIRECCION GENERAL DE LA POLICIA (2/8/2036 10:59:59 PM) DST (ABA.ECOM) CA (7/9/2009 5:33:53 PM) DST (ANX Network) CA (12/9/2018 4:16:48 PM) DST (Baltimore EZ) CA (7/3/2009 7:56:53 PM) DST (National Retail Federation) RootCA (12/8/2008 4:14:16 PM) DST (United Parcel Service) RootCA (12/7/2008 12:25:46 AM) DST ACES CA X6 (11/20/2017 9:19:58 PM) DST Root CA X3 (9/30/2021 2:01:15 PM) DST RootCA X1 (11/28/2008 6:18:55 PM) DST RootCA X2 (11/27/2008 10:46:16 PM) DSTCA E1 (12/10/2018 6:40:23 PM) DSTCA E2 (12/9/2018 7:47:26 PM) DST-Entrust GTI CA (12/9/2018 12:32:24 AM) D-TRUST GmbH (5/16/2022 5:20:47 AM) D-TRUST GmbH (6/8/2012 11:47:46 AM) D-TRUST GmbH (5/16/2022 5:20:47 AM) EBG Elektronik Sertifika Hizmet Saglayicisi (8/14/2016 12:31:09 AM) E-Certchile (9/5/2028 7:39:41 PM) Echoworx Root CA2 (10/7/2030 10:49:13 AM) ECRaizEstado (6/23/2030 1:41:27 PM) EDICOM (4/13/2028 4:24:22 PM) E-GÜVEN Elektronik Sertifika Hizmet Saglayicisi (1/4/2017 11:32:48 AM) E-ME SSI (RCA) (5/19/2027 8:48:15 AM) Entrust (11/27/2026 8:53:42 PM) Entrust (5/25/2019 4:39:40 PM) Entrust.net (12/7/2030 5:55:54 PM) Equifax Secure eBusiness CA-1 (6/21/2020 4:00:00 AM) Equifax Secure eBusiness CA-2 (6/23/2019 12:14:45 PM) Equifax Secure Global eBusiness CA-1 (6/21/2020 4:00:00 AM) eSign Australia: eSign Imperito Primary Root CA (5/23/2012 11:59:59 PM) eSign Australia: Gatekeeper Root CA (5/23/2014 11:59:59 PM) eSign Australia: Primary Utility Root CA (5/23/2012 11:59:59 PM) Fabrica Nacional de Moneda y Timbre (3/18/2019 3:26:19 PM) GeoTrust (8/22/2018 4:41:51 PM) GeoTrust (7/16/2036 11:59:59 PM) GeoTrust Global CA (5/21/2022 4:00:00 AM) GeoTrust Global CA 2 (3/4/2019 5:00:00 AM) GeoTrust Primary Certification Authority - G2 (1/18/2038 11:59:59 PM) GeoTrust Primary Certification Authority - G3 (12/1/2037 11:59:59 PM) GeoTrust Universal CA (3/4/2029 5:00:00 AM) GeoTrust Universal CA 2 (3/4/2029 5:00:00 AM) Global Chambersign Root - 2008 (7/31/2038 12:31:40 PM) GlobalSign (1/28/2028 12:00:00 PM) GlobalSign (12/15/2021 8:00:00 AM) Go Daddy Class 2 Certification Authority (6/29/2034 5:06:20 PM) GTE CyberTrust Global Root (8/13/2018 11:59:00 PM) GTE CyberTrust Root (4/3/2004 11:59:00 PM) GTE CyberTrust Root (2/23/2006 11:59:00 PM) Halcom CA FO (6/5/2020 10:33:31 AM) Halcom CA PO 2 (2/7/2019 6:33:31 PM) Hongkong Post Root CA (1/16/2010 11:59:00 PM) Hongkong Post Root CA 1 (5/15/2023 4:52:29 AM) I.CA První certifikacní autorita a.s. (4/1/2018 12:00:00 AM) I.CA První certifikacní autorita a.s. (4/1/2018 12:00:00 AM) InfoNotary (3/6/2026 5:33:05 PM) IPS SERVIDORES (12/29/2009 11:21:07 PM) IZENPE S.A. (1/30/2018 11:00:00 PM) Izenpe.com (12/13/2037 8:27:25 AM) Japan Certification Services, Inc. SecureSign RootCA1 (9/15/2020 2:59:59 PM) Japan Certification Services, Inc. SecureSign RootCA11 (4/8/2029 4:56:47 AM) Japan Certification Services, Inc. SecureSign RootCA2 (9/15/2020 2:59:59 PM) Japan Certification Services, Inc. SecureSign RootCA3 (9/15/2020 2:59:59 PM) Japan Local Government PKI Application CA (3/31/2016 2:59:59 PM) Japanese Government ApplicationCA (12/12/2017 3:00:00 PM) Juur-SK AS Sertifitseerimiskeskus (8/26/2016 2:23:01 PM) KamuSM (8/21/2017 11:37:07 AM) KISA RootCA 1 (8/24/2025 8:05:46 AM) KISA RootCA 3 (11/19/2014 6:39:51 AM) Macao Post eSignTrust (1/29/2013 11:59:59 PM) MicroSec e-Szigno Root CA (4/6/2017 12:28:44 PM) Microsoft Authenticode(tm) Root (12/31/1999 11:59:59 PM) Microsoft Root Authority (12/31/2020 7:00:00 AM) Microsoft Root Certificate Authority (5/9/2021 11:28:13 PM) Microsoft Timestamp Root (12/30/1999 11:59:59 PM) MOGAHA Govt of Korea (4/21/2012 9:07:23 AM) MOGAHA Govt of Korea GPKI (3/15/2017 6:00:04 AM) NetLock Arany (Class Gold) Fotanúsítvány (12/6/2028 3:08:21 PM) NetLock Expressz (Class C) Tanusitvanykiado (2/20/2019 2:08:11 PM) NetLock Kozjegyzoi (Class A) Tanusitvanykiado (2/19/2019 11:14:47 PM) NetLock Minositett Kozjegyzoi (Class QA) Tanusitvanykiado (12/15/2022 1:47:11 AM) NetLock Platina (Class Platinum) Fotanúsítvány (12/6/2028 3:12:44 PM) NetLock Uzleti (Class B) Tanusitvanykiado (2/20/2019 2:10:22 PM) Netrust CA1 (3/30/2021 2:57:45 AM) Network Solutions (12/31/2029 11:59:59 PM) NLB Nova Ljubljanska Banka d.d. 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(3/9/2009 9:08:07 PM) Sigen-CA (6/29/2021 9:57:46 PM) Sigov-CA (1/10/2021 2:22:52 PM) Skaitmeninio sertifikavimo centras (12/28/2026 12:05:04 PM) Skaitmeninio sertifikavimo centras (12/25/2026 12:08:26 PM) Skaitmeninio sertifikavimo centras (12/22/2026 12:11:30 PM) Sonera Class1 CA (4/6/2021 10:49:13 AM) Sonera Class2 CA (4/6/2021 7:29:40 AM) Spanish Property & Commerce Registry CA (4/27/2012 9:39:50 AM) Staat der Nederlanden Root CA (12/16/2015 9:15:38 AM) Staat der Nederlanden Root CA - G2 (3/25/2020 11:03:10 AM) Starfield Class 2 Certification Authority (6/29/2034 5:39:16 PM) Starfield Technologies (6/26/2019 12:19:54 AM) Starfield Technologies Inc. (12/31/2029 11:59:59 PM) StartCom Certification Authority (9/17/2036 7:46:36 PM) S-TRUST Authentication and Encryption Root CA 2005:PN (6/21/2030 11:59:59 PM) Swisscom Root CA 1 (8/18/2025 10:06:20 PM) SwissSign (10/25/2036 8:30:35 AM) SwissSign Platinum G2 Root CA (10/25/2036 8:36:00 AM) SwissSign Silver G2 Root CA (10/25/2036 8:32:46 AM) TC TrustCenter Class 1 CA (1/1/2011 11:59:59 AM) TC TrustCenter Class 2 CA (1/1/2011 11:59:59 AM) TC TrustCenter Class 2 CA II (12/31/2025 10:59:59 PM) TC TrustCenter Class 3 CA (1/1/2011 11:59:59 AM) TC TrustCenter Class 3 CA II (12/31/2025 10:59:59 PM) TC TrustCenter Class 4 CA (1/1/2011 11:59:59 AM) TC TrustCenter Class 4 CA II (12/31/2025 10:59:59 PM) TC TrustCenter Time Stamping CA (1/1/2011 11:59:59 AM) TC TrustCenter Universal CA I (12/31/2025 10:59:59 PM) TC TrustCenter Universal CA II (12/31/2030 10:59:59 PM) thawte (12/31/2020 11:59:59 PM) thawte (7/16/2036 11:59:59 PM) thawte (12/31/2020 11:59:59 PM) thawte (12/31/2020 11:59:59 PM) thawte (12/31/2020 11:59:59 PM) thawte (12/31/2020 11:59:59 PM) thawte (12/31/2020 11:59:59 PM) thawte Primary Root CA - G2 (1/18/2038 11:59:59 PM) thawte Primary Root CA - G3 (12/1/2037 11:59:59 PM) Thawte Timestamping CA (12/31/2020 11:59:59 PM) Trustis EVS Root CA (1/9/2027 11:56:00 AM) Trustis FPS Root CA (1/21/2024 11:36:54 AM) Trustwave (1/1/2035 5:37:19 AM) Trustwave (12/31/2029 7:40:55 PM) Trustwave (12/31/2029 7:52:06 PM) TURKTRUST Elektronik Islem Hizmetleri (9/16/2015 12:13:05 PM) TURKTRUST Elektronik Islem Hizmetleri (3/22/2015 10:04:51 AM) TURKTRUST Elektronik Sertifika Hizmet Saglayicisi (9/16/2015 10:07:57 AM) TURKTRUST Elektronik Sertifika Hizmet Saglayicisi (3/22/2015 10:27:17 AM) TÜRKTRUST Elektronik Sertifika Hizmet Saglayicisi (12/22/2017 6:37:19 PM) TW Government Root Certification Authority (12/5/2032 1:23:33 PM) TWCA Root Certification Authority 1 (12/31/2030 3:59:59 PM) TWCA Root Certification Authority 2 (12/31/2030 3:59:59 PM) U.S. Government FBCA (10/6/2010 6:53:56 PM) UCA Global Root (12/31/2037 12:00:00 AM) UCA Root (12/31/2029 12:00:00 AM) USERTrust (7/9/2019 6:40:36 PM) USERTrust (7/9/2019 5:36:58 PM) USERTrust (6/24/2019 7:06:30 PM) USERTrust (7/9/2019 6:19:22 PM) USERTrust (5/30/2020 10:48:38 AM) UTN - USERFirst-Network Applications (7/9/2019 6:57:49 PM) ValiCert Class 3 Policy Validation Authority (6/26/2019 12:22:33 AM) VAS Latvijas Pasts SSI(RCA) (9/13/2024 9:27:57 AM) VeriSign (5/18/2018 11:59:59 PM) VeriSign (7/16/2036 11:59:59 PM) VeriSign (8/1/2028 11:59:59 PM) VeriSign (12/31/1999 9:37:48 AM) VeriSign (1/7/2004 11:59:59 PM) VeriSign (5/18/2018 11:59:59 PM) VeriSign (1/7/2004 11:59:59 PM) VeriSign (8/1/2028 11:59:59 PM) VeriSign (8/1/2028 11:59:59 PM) VeriSign (1/7/2020 11:59:59 PM) VeriSign (12/31/1999 9:35:58 AM) VeriSign (8/1/2028 11:59:59 PM) VeriSign (7/16/2036 11:59:59 PM) VeriSign (1/7/2004 11:59:59 PM) VeriSign (7/16/2036 11:59:59 PM) VeriSign (1/7/2010 11:59:59 PM) VeriSign (5/18/2018 11:59:59 PM) VeriSign (8/1/2028 11:59:59 PM) VeriSign (1/7/2004 11:59:59 PM) VeriSign (7/16/2036 11:59:59 PM) VeriSign (7/16/2036 11:59:59 PM) VeriSign (8/1/2028 11:59:59 PM) VeriSign (5/18/2018 11:59:59 PM) VeriSign Class 3 Public Primary CA (8/1/2028 11:59:59 PM) VeriSign Class 3 Public Primary Certification Authority - G4 (1/18/2038 11:59:59 PM) VeriSign Time Stamping CA (1/7/2004 11:59:59 PM) VeriSign Universal Root Certification Authority (12/1/2037 11:59:59 PM) Visa eCommerce Root (6/24/2022 12:16:12 AM) Visa Information Delivery Root CA (6/29/2025 5:42:42 PM) VRK Gov. Root CA (12/18/2023 1:51:08 PM) Wells Fargo Root Certificate Authority (1/14/2021 4:41:28 PM) WellsSecure Public Certificate Authority (12/14/2022 12:07:54 AM) Xcert EZ by DST (7/11/2009 4:14:18 PM)

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Adventures in MVVM – My ViewModel Base

- by Brian Genisio's House Of Bilz

More Adventures in MVVM First, I’d like to say: THIS IS NOT A NEW MVVM FRAMEWORK. I tend to believe that MVVM support code should be specific to the system you are building and the developers working on it. I have yet to find an MVVM framework that does everything I want it to without doing too much. Don’t get me wrong… there are some good frameworks out there. I just like to pick and choose things that make sense for me. I’d also like to add that some of these features only work in WPF. As of Silveright 4, they don’t support binding to dynamic properties, so some of the capabilities are lost. That being said, I want to share my ViewModel base class with the world. I have had several conversations with people about the problems I have solved using this ViewModel base. A while back, I posted an article about some experiments with a “Rails Inspired ViewModel”. What followed from those ideas was a ViewModel base class that I take with me and use in my projects. It has a lot of features, all designed to reduce the friction in writing view models. I have put the code out on Codeplex under the project: ViewModelSupport. Finally, this article focuses on the ViewModel and only glosses over the View and the Model. Without all three, you don’t have MVVM. But this base class is for the ViewModel, so that is what I am focusing on. Features: Automatic Command Plumbing Property Change Notification Strongly Typed Property Getter/Setters Dynamic Properties Default Property values Derived Properties Automatic Method Execution Command CanExecute Change Notification Design-Time Detection What about Silverlight? Automatic Command Plumbing This feature takes the plumbing out of creating commands. The common pattern for commands in a ViewModel is to have an Execute method as well as an optional CanExecute method. To plumb that together, you create an ICommand Property, and set it in the constructor like so: Before public class AutomaticCommandViewModel { public AutomaticCommandViewModel() { MyCommand = new DelegateCommand(Execute_MyCommand, CanExecute_MyCommand); } public void Execute_MyCommand() { // Do something } public bool CanExecute_MyCommand() { // Are we in a state to do something? return true; } public DelegateCommand MyCommand { get; private set; } } With the base class, this plumbing is automatic and the property (MyCommand of type ICommand) is created for you. The base class uses the convention that methods be prefixed with Execute_ and CanExecute_ in order to be plumbed into commands with the property name after the prefix. You are left to be expressive with your behavior without the plumbing. If you are wondering how CanExecuteChanged is raised, see the later section “Command CanExecute Change Notification”. After public class AutomaticCommandViewModel : ViewModelBase { public void Execute_MyCommand() { // Do something } public bool CanExecute_MyCommand() { // Are we in a state to do something? return true; } } Property Change Notification One thing that always kills me when implementing ViewModels is how to make properties that notify when they change (via the INotifyPropertyChanged interface). There have been many attempts to make this more automatic. My base class includes one option. There are others, but I feel like this works best for me. The common pattern (without my base class) is to create a private backing store for the variable and specify a getter that returns the private field. The setter will set the private field and fire an event that notifies the change, only if the value has changed. Before public class PropertyHelpersViewModel : INotifyPropertyChanged { private string text; public string Text { get { return text; } set { if(text != value) { text = value; RaisePropertyChanged("Text"); } } } protected void RaisePropertyChanged(string propertyName) { var handlers = PropertyChanged; if(handlers != null) handlers(this, new PropertyChangedEventArgs(propertyName)); } public event PropertyChangedEventHandler PropertyChanged; } This way of defining properties is error-prone and tedious. Too much plumbing. My base class eliminates much of that plumbing with the same functionality: After public class PropertyHelpersViewModel : ViewModelBase { public string Text { get { return Get<string>("Text"); } set { Set("Text", value);} } } Strongly Typed Property Getters/Setters It turns out that we can do better than that. We are using a strongly typed language where the use of “Magic Strings” is often frowned upon. Lets make the names in the getters and setters strongly typed: A refinement public class PropertyHelpersViewModel : ViewModelBase { public string Text { get { return Get(() => Text); } set { Set(() => Text, value); } } } Dynamic Properties In C# 4.0, we have the ability to program statically OR dynamically. This base class lets us leverage the powerful dynamic capabilities in our ecosystem. (This is how the automatic commands are implemented, BTW) By calling Set(“Foo”, 1), you have now created a dynamic property called Foo. It can be bound against like any static property. The opportunities are endless. One great way to exploit this behavior is if you have a customizable view engine with templates that bind to properties defined by the user. The base class just needs to create the dynamic properties at runtime from information in the model, and the custom template can bind even though the static properties do not exist. All dynamic properties still benefit from the notifiable capabilities that static properties do. For any nay-sayers out there that don’t like using the dynamic features of C#, just remember this: the act of binding the View to a ViewModel is dynamic already. Why not exploit it? Get over it :) Just declare the property dynamically public class DynamicPropertyViewModel : ViewModelBase { public DynamicPropertyViewModel() { Set("Foo", "Bar"); } } Then reference it normally <TextBlock Text="{Binding Foo}" /> Default Property Values The Get() method also allows for default properties to be set. Don’t set them in the constructor. Set them in the property and keep the related code together: public string Text { get { return Get(() => Text, "This is the default value"); } set { Set(() => Text, value);} } Derived Properties This is something I blogged about a while back in more detail. This feature came from the chaining of property notifications when one property affects the results of another, like this: Before public class DependantPropertiesViewModel : ViewModelBase { public double Score { get { return Get(() => Score); } set { Set(() => Score, value); RaisePropertyChanged("Percentage"); RaisePropertyChanged("Output"); } } public int Percentage { get { return (int)(100 * Score); } } public string Output { get { return "You scored " + Percentage + "%."; } } } The problem is: The setter for Score has to be responsible for notifying the world that Percentage and Output have also changed. This, to me, is backwards. It certainly violates the “Single Responsibility Principle.” I have been bitten in the rear more than once by problems created from code like this. What we really want to do is invert the dependency. Let the Percentage property declare that it changes when the Score Property changes. After public class DependantPropertiesViewModel : ViewModelBase { public double Score { get { return Get(() => Score); } set { Set(() => Score, value); } } [DependsUpon("Score")] public int Percentage { get { return (int)(100 * Score); } } [DependsUpon("Percentage")] public string Output { get { return "You scored " + Percentage + "%."; } } } Automatic Method Execution This one is extremely similar to the previous, but it deals with method execution as opposed to property. When you want to execute a method triggered by property changes, let the method declare the dependency instead of the other way around. Before public class DependantMethodsViewModel : ViewModelBase { public double Score { get { return Get(() => Score); } set { Set(() => Score, value); WhenScoreChanges(); } } public void WhenScoreChanges() { // Handle this case } } After public class DependantMethodsViewModel : ViewModelBase { public double Score { get { return Get(() => Score); } set { Set(() => Score, value); } } [DependsUpon("Score")] public void WhenScoreChanges() { // Handle this case } } Command CanExecute Change Notification Back to Commands. One of the responsibilities of commands that implement ICommand – it must fire an event declaring that CanExecute() needs to be re-evaluated. I wanted to wait until we got past a few concepts before explaining this behavior. You can use the same mechanism here to fire off the change. In the CanExecute_ method, declare the property that it depends upon. When that property changes, the command will fire a CanExecuteChanged event, telling the View to re-evaluate the state of the command. The View will make appropriate adjustments, like disabling the button. DependsUpon works on CanExecute methods as well public class CanExecuteViewModel : ViewModelBase { public void Execute_MakeLower() { Output = Input.ToLower(); } [DependsUpon("Input")] public bool CanExecute_MakeLower() { return !string.IsNullOrWhiteSpace(Input); } public string Input { get { return Get(() => Input); } set { Set(() => Input, value);} } public string Output { get { return Get(() => Output); } set { Set(() => Output, value); } } } Design-Time Detection If you want to add design-time data to your ViewModel, the base class has a property that lets you ask if you are in the designer. You can then set some default values that let your designer see what things might look like in runtime. Use the IsInDesignMode property public DependantPropertiesViewModel() { if(IsInDesignMode) { Score = .5; } } What About Silverlight? Some of the features in this base class only work in WPF. As of version 4, Silverlight does not support binding to dynamic properties. This, in my opinion, is a HUGE limitation. Not only does it keep you from using many of the features in this ViewModel, it also keeps you from binding to ViewModels designed in IronRuby. Does this mean that the base class will not work in Silverlight? No. Many of the features outlined in this article WILL work. All of the property abstractions are functional, as long as you refer to them statically in the View. This, of course, means that the automatic command hook-up doesn’t work in Silverlight. You need to plumb it to a static property in order for the Silverlight View to bind to it. Can I has a dynamic property in SL5? Good to go? So, that concludes the feature explanation of my ViewModel base class. Feel free to take it, fork it, whatever. It is hosted on CodePlex. When I find other useful additions, I will add them to the public repository. I use this base class every day. It is mature, and well tested. If, however, you find any problems with it, please let me know! Also, feel free to suggest patches to me via the CodePlex site. :)

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Metro: Query Selectors

- by Stephen.Walther

The goal of this blog entry is to explain how to perform queries using selectors when using the WinJS library. In particular, you learn how to use the WinJS.Utilities.query() method and the QueryCollection class to retrieve and modify the elements of an HTML document. Introduction to Selectors When you are building a Web application, you need some way of easily retrieving elements from an HTML document. For example, you might want to retrieve all of the input elements which have a certain class. Or, you might want to retrieve the one and only element with an id of favoriteColor. The standard way of retrieving elements from an HTML document is by using a selector. Anyone who has ever created a Cascading Style Sheet has already used selectors. You use selectors in Cascading Style Sheets to apply formatting rules to elements in a document. For example, the following Cascading Style Sheet rule changes the background color of every INPUT element with a class of .required in a document to the color red: input.red { background-color: red } The “input.red” part is the selector which matches all INPUT elements with a class of red. The W3C standard for selectors (technically, their recommendation) is entitled “Selectors Level 3” and the standard is located here: http://www.w3.org/TR/css3-selectors/ Selectors are not only useful for adding formatting to the elements of a document. Selectors are also useful when you need to apply behavior to the elements of a document. For example, you might want to select a particular BUTTON element with a selector and add a click handler to the element so that something happens whenever you click the button. Selectors are not specific to Cascading Style Sheets. You can use selectors in your JavaScript code to retrieve elements from an HTML document. jQuery is famous for its support for selectors. Using jQuery, you can use a selector to retrieve matching elements from a document and modify the elements. The WinJS library enables you to perform the same types of queries as jQuery using the W3C selector syntax. Performing Queries with the WinJS.Utilities.query() Method When using the WinJS library, you perform a query using a selector by using the WinJS.Utilities.query() method. The following HTML document contains a BUTTON and a DIV element: <!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>Application1</title>  <link href="//Microsoft.WinJS.0.6/css/ui-dark.css" rel="stylesheet"> <script src="//Microsoft.WinJS.0.6/js/base.js"></script> <script src="//Microsoft.WinJS.0.6/js/ui.js"></script>  <link href="/css/default.css" rel="stylesheet"> <script src="/js/default.js"></script> </head> <body> <button>Click Me!</button> <div style="display:none"> <h1>Secret Message</h1> </div> </body> </html> The document contains a reference to the following JavaScript file named \js\default.js: (function () { "use strict"; var app = WinJS.Application; app.onactivated = function (eventObject) { if (eventObject.detail.kind === Windows.ApplicationModel.Activation.ActivationKind.launch) { WinJS.Utilities.query("button").listen("click", function () { WinJS.Utilities.query("div").clearStyle("display"); }); } }; app.start(); })(); The default.js script uses the WinJS.Utilities.query() method to retrieve all of the BUTTON elements in the page. The listen() method is used to wire an event handler to the BUTTON click event. When you click the BUTTON, the secret message contained in the hidden DIV element is displayed. The clearStyle() method is used to remove the display:none style attribute from the DIV element. Under the covers, the WinJS.Utilities.query() method uses the standard querySelectorAll() method. This means that you can use any selector which is compatible with the querySelectorAll() method when using the WinJS.Utilities.query() method. The querySelectorAll() method is defined in the W3C Selectors API Level 1 standard located here: http://www.w3.org/TR/selectors-api/ Unlike the querySelectorAll() method, the WinJS.Utilities.query() method returns a QueryCollection. We talk about the methods of the QueryCollection class below. Retrieving a Single Element with the WinJS.Utilities.id() Method If you want to retrieve a single element from a document, instead of matching a set of elements, then you can use the WinJS.Utilities.id() method. For example, the following line of code changes the background color of an element to the color red: WinJS.Utilities.id("message").setStyle("background-color", "red"); The statement above matches the one and only element with an Id of message. For example, the statement matches the following DIV element: <div id="message">Hello!</div> Notice that you do not use a hash when matching a single element with the WinJS.Utilities.id() method. You would need to use a hash when using the WinJS.Utilities.query() method to do the same thing like this: WinJS.Utilities.query("#message").setStyle("background-color", "red"); Under the covers, the WinJS.Utilities.id() method calls the standard document.getElementById() method. The WinJS.Utilities.id() method returns the result as a QueryCollection. If no element matches the identifier passed to WinJS.Utilities.id() then you do not get an error. Instead, you get a QueryCollection with no elements (length=0). Using the WinJS.Utilities.children() method The WinJS.Utilities.children() method enables you to retrieve a QueryCollection which contains all of the children of a DOM element. For example, imagine that you have a DIV element which contains children DIV elements like this: <div id="discussContainer"> <div>Message 1</div> <div>Message 2</div> <div>Message 3</div> </div> You can use the following code to add borders around all of the child DIV element and not the container DIV element: var discussContainer = WinJS.Utilities.id("discussContainer").get(0); WinJS.Utilities.children(discussContainer).setStyle("border", "2px dashed red"); It is important to understand that the WinJS.Utilities.children() method only works with a DOM element and not a QueryCollection. Notice that the get() method is used to retrieve the DOM element which represents the discussContainer. Working with the QueryCollection Class Both the WinJS.Utilities.query() method and the WinJS.Utilities.id() method return an instance of the QueryCollection class. The QueryCollection class derives from the base JavaScript Array class and adds several useful methods for working with HTML elements: addClass(name) – Adds a class to every element in the QueryCollection. clearStyle(name) – Removes a style from every element in the QueryCollection. conrols(ctor, options) – Enables you to create controls. get(index) – Retrieves the element from the QueryCollection at the specified index. getAttribute(name) – Retrieves the value of an attribute for the first element in the QueryCollection. hasClass(name) – Returns true if the first element in the QueryCollection has a certain class. include(items) – Includes a collection of items in the QueryCollection. listen(eventType, listener, capture) – Adds an event listener to every element in the QueryCollection. query(query) – Performs an additional query on the QueryCollection and returns a new QueryCollection. removeClass(name) – Removes a class from the every element in the QueryCollection. removeEventListener(eventType, listener, capture) – Removes an event listener from every element in the QueryCollection. setAttribute(name, value) – Adds an attribute to every element in the QueryCollection. setStyle(name, value) – Adds a style attribute to every element in the QueryCollection. template(templateElement, data, renderDonePromiseContract) – Renders a template using the supplied data. toggleClass(name) – Toggles the specified class for every element in the QueryCollection. Because the QueryCollection class derives from the base Array class, it also contains all of the standard Array methods like forEach() and slice(). Summary In this blog post, I’ve described how you can perform queries using selectors within a Windows Metro Style application written with JavaScript. You learned how to return an instance of the QueryCollection class by using the WinJS.Utilities.query(), WinJS.Utilities.id(), and WinJS.Utilities.children() methods. You also learned about the methods of the QueryCollection class.

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OO Design, how to model Tonal Harmony?

- by David

I have started to write a program in C++ 11 that would analyse chords, scales, and harmony. The biggest problem I am having in my design phase, is that the note 'C' is a note, a type of chord (Cmaj, Cmin, C7, etc), and a type of key (the key of Cmajor, Cminor). The same issue arises with intervals (minor 3rd, major 3rd). I am using a base class, Token, that is the base class for all 'symbols' in the program. so for example: class Token { public: typedef shared_ptr<Token> pointer_type; Token() {} virtual ~Token() {} }; class Command : public Token { public: Command() {} pointer_type execute(); } class Note : public Token; class Triad : public Token; class MajorTriad : public Triad; // CMajorTriad, etc class Key : public Token; class MinorKey : public Key; // Natural Minor, Harmonic minor,etc class Scale : public Token; As you can see, to create all the derived classes (CMajorTriad, C, CMajorScale, CMajorKey, etc) would quickly become ridiculously complex including all the other notes, as well as enharmonics. multiple inheritance would not work, ie: class C : public Note, Triad, Key, Scale class C, cannot be all of these things at the same time. It is contextual, also polymorphing with this will not work (how to determine which super methods to perform? calling every super class constructors should not happen here) Are there any design ideas or suggestions that people have to offer? I have not been able to find anything on google in regards to modelling tonal harmony from an OO perspective. There are just far too many relationships between all the concepts here.

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Redirecting to a dynamic page

- by binarydev

I have a page displaying blog posts (latest_posts.php) and another page that display single blog posts (blog.php) . I intend to link the image title in latest_posts.php so that it redirects to blog.php where it would display the particular post that was clicked. latest_posts.php:  <h2 class="underline"> <span>What's new</span> <span></span> </h2>   <ul class="post-list post-list-1"> <?php /* Fetches Date/Time, Post Content and title */ include 'dbconnect.php'; $sql = "SELECT * FROM wp_posts"; $res = mysql_query($sql); while ( $row = mysql_fetch_array($res) ) { ?>  <li class="clear-fix">  <div class="post-list-date"> <div class="post-date-box"> <?php //Timestamp broken down to show accordingly $timestamp = $row['post_date']; $datetime = new DateTime($timestamp); $date = $datetime->format("d"); $month = $datetime->format("M"); ?> <h3> <?php echo $date; ?> </h3> <span> <?php echo $month; ?> </span> </div> </div>   <div class="post-list-image">  <div class="image image-overlay-url image-fancybox-url"> <a href="post.php" class="preloader-image"> <?php echo '<img src="', $row['image'], '" alt="' , $row['post_title'] , '\'s Blog Image" />'; ?> </a> </div>  </div>   <div class="post-list-content"> <div>  <h4> <a href="post.php? . $row['ID'] . "> <?php echo $row['post_title']; ?> </a> </h4>   <p> <?php echo $row ['post_content']; }?> </p>  </div> </div>  </li>  </ul>  <a href="blog.php" class="button-browse">Browse All Posts</a> </div> <?php require_once('include/twitter_user_timeline.php'); ?> blog.php: <?php require_once('include/header.php'); ?> <body class="blog"> <?php require_once('include/navigation_bar_blog.php'); ?> <div class="blog"> <div class="main">  <h2 class="underline"> <span>What's new</span> <span></span> </h2>   <div class="layout-p-66x33 clear-fix">    <ul class="post-list post-list-2"> <?php /* Fetches Date/Time, Post Content and title with Pagination */ include 'dbconnect.php'; //sets to default page if(empty($_GET['pn'])){ $page=1; } else { $page = $_GET['pn']; } // Index of the page $index = ($page-1)*3; $sql = "SELECT * FROM `wp_posts` ORDER BY `post_date` DESC LIMIT " . $index . " ,3"; $res = mysql_query($sql); //Loops through the values while ( $row = mysql_fetch_array($res) ) { ?>  <li class="clear-fix">  <div class="post-list-date"> <div class="post-date-box"> <?php //Timestamp broken down to show accordingly $timestamp = $row['post_date']; $datetime = new DateTime($timestamp); $date = $datetime->format("d"); $month = $datetime->format("M"); ?> <h3> <?php echo $date; ?> </h3> <span> <?php echo $month; ?> </span> </div> </div>   <div class="post-list-image">  <div class="image image-overlay-url image-fancybox-url"> <a href="post.php" class="preloader-image"> <?php echo '<img src="', $row['image'], '" alt="' , $row['post_title'] , '\'s Blog Image" />'; ?> </a> </div>  </div>   <div class="post-list-content"> <div> <?php $id = $_GET['ID']; $post = lookup_post_somehow($id); if($post) { // render post } else { echo 'blog post not found..'; } ?>  <h4> <a href="post.php"> <?php echo $row['post_title']; ?> </a> </h4>   <p> <?php echo $row ['post_content']; ?> </p>  </div> </div>  </li>  <?php } // close while loop ?> </ul>  <div> <ul class="blog-pagination clear-fix"> <?php //Count the number of rows $numberofrows = mysql_query("SELECT COUNT(ID) FROM `wp_posts`"); //Do ciel() to round the result according to number of posts $postsperpage = 4; $numOfPages = ceil($numberofrows / $postsperpage); for($i=1; $i < $numOfPages; $i++) { //echos links for each page $paginationDisplay = '<li><a href="blog.php?pn=' . $i . '">' . $i . '</a></li>'; echo $paginationDisplay; } ?>  </ul> </div>   </div>  </div> </div> <?php require_once('include/twitter_user_timeline.php'); ?> <?php require_once('include/footer_blog.php'); ?> How do I render?

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Inside the DLR – Invoking methods

- by Simon Cooper

So, we’ve looked at how a dynamic call is represented in a compiled assembly, and how the dynamic lookup is performed at runtime. The last piece of the puzzle is how the resolved method gets invoked, and that is the subject of this post. Invoking methods As discussed in my previous posts, doing a full lookup and bind at runtime each and every single time the callsite gets invoked would be far too slow to be usable. The results obtained from the callsite binder must to be cached, along with a series of conditions to determine whether the cached result can be reused. So, firstly, how are the conditions represented? These conditions can be anything; they are determined entirely by the semantics of the language the binder is representing. The binder has to be able to return arbitary code that is then executed to determine whether the conditions apply or not. Fortunately, .NET 4 has a neat way of representing arbitary code that can be easily combined with other code – expression trees. All the callsite binder has to return is an expression (called a ‘restriction’) that evaluates to a boolean, returning true when the restriction passes (indicating the corresponding method invocation can be used) and false when it does’t. If the bind result is also represented in an expression tree, these can be combined easily like so: if ([restriction is true]) { [invoke cached method] } Take my example from my previous post: public class ClassA { public static void TestDynamic() { CallDynamic(new ClassA(), 10); CallDynamic(new ClassA(), "foo"); } public static void CallDynamic(dynamic d, object o) { d.Method(o); } public void Method(int i) {} public void Method(string s) {} } When the Method(int) method is first bound, along with an expression representing the result of the bind lookup, the C# binder will return the restrictions under which that bind can be reused. In this case, it can be reused if the types of the parameters are the same: if (thisArg.GetType() == typeof(ClassA) && arg1.GetType() == typeof(int)) { thisClassA.Method(i); } Caching callsite results So, now, it’s up to the callsite to link these expressions returned from the binder together in such a way that it can determine which one from the many it has cached it should use. This caching logic is all located in the System.Dynamic.UpdateDelegates class. It’ll help if you’ve got this type open in a decompiler to have a look yourself. For each callsite, there are 3 layers of caching involved: The last method invoked on the callsite. All methods that have ever been invoked on the callsite. All methods that have ever been invoked on any callsite of the same type. We’ll cover each of these layers in order Level 1 cache: the last method called on the callsite When a CallSite<T> object is first instantiated, the Target delegate field (containing the delegate that is called when the callsite is invoked) is set to one of the UpdateAndExecute generic methods in UpdateDelegates, corresponding to the number of parameters to the callsite, and the existance of any return value. These methods contain most of the caching, invoke, and binding logic for the callsite. The first time this method is invoked, the UpdateAndExecute method finds there aren’t any entries in the caches to reuse, and invokes the binder to resolve a new method. Once the callsite has the result from the binder, along with any restrictions, it stitches some extra expressions in, and replaces the Target field in the callsite with a compiled expression tree similar to this (in this example I’m assuming there’s no return value): if ([restriction is true]) { [invoke cached method] return; } if (callSite._match) { _match = false; return; } else { UpdateAndExecute(callSite, arg0, arg1, ...); } Woah. What’s going on here? Well, this resulting expression tree is actually the first level of caching. The Target field in the callsite, which contains the delegate to call when the callsite is invoked, is set to the above code compiled from the expression tree into IL, and then into native code by the JIT. This code checks whether the restrictions of the last method that was invoked on the callsite (the ‘primary’ method) match, and if so, executes that method straight away. This means that, the next time the callsite is invoked, the first code that executes is the restriction check, executing as native code! This makes this restriction check on the primary cached delegate very fast. But what if the restrictions don’t match? In that case, the second part of the stitched expression tree is executed. What this section should be doing is calling back into the UpdateAndExecute method again to resolve a new method. But it’s slightly more complicated than that. To understand why, we need to understand the second and third level caches. Level 2 cache: all methods that have ever been invoked on the callsite When a binder has returned the result of a lookup, as well as updating the Target field with a compiled expression tree, stitched together as above, the callsite puts the same compiled expression tree in an internal list of delegates, called the rules list. This list acts as the level 2 cache. Why use the same delegate? Stitching together expression trees is an expensive operation. You don’t want to do it every time the callsite is invoked. Ideally, you would create one expression tree from the binder’s result, compile it, and then use the resulting delegate everywhere in the callsite. But, if the same delegate is used to invoke the callsite in the first place, and in the caches, that means each delegate needs two modes of operation. An ‘invoke’ mode, for when the delegate is set as the value of the Target field, and a ‘match’ mode, used when UpdateAndExecute is searching for a method in the callsite’s cache. Only in the invoke mode would the delegate call back into UpdateAndExecute. In match mode, it would simply return without doing anything. This mode is controlled by the _match field in CallSite<T>. The first time the callsite is invoked, _match is false, and so the Target delegate is called in invoke mode. Then, if the initial restriction check fails, the Target delegate calls back into UpdateAndExecute. This method sets _match to true, then calls all the cached delegates in the rules list in match mode to try and find one that passes its restrictions, and invokes it. However, there needs to be some way for each cached delegate to inform UpdateAndExecute whether it passed its restrictions or not. To do this, as you can see above, it simply re-uses _match, and sets it to false if it did not pass the restrictions. This allows the code within each UpdateAndExecute method to check for cache matches like so: foreach (T cachedDelegate in Rules) { callSite._match = true; cachedDelegate(); // sets _match to false if restrictions do not pass if (callSite._match) { // passed restrictions, and the cached method was invoked // set this delegate as the primary target to invoke next time callSite.Target = cachedDelegate; return; } // no luck, try the next one... } Level 3 cache: all methods that have ever been invoked on any callsite with the same signature The reason for this cache should be clear – if a method has been invoked through a callsite in one place, then it is likely to be invoked on other callsites in the codebase with the same signature. Rather than living in the callsite, the ‘global’ cache for callsite delegates lives in the CallSiteBinder class, in the Cache field. This is a dictionary, typed on the callsite delegate signature, providing a RuleCache<T> instance for each delegate signature. This is accessed in the same way as the level 2 callsite cache, by the UpdateAndExecute methods. When a method is matched in the global cache, it is copied into the callsite and Target cache before being executed. Putting it all together So, how does this all fit together? Like so (I’ve omitted some implementation & performance details): That, in essence, is how the DLR performs its dynamic calls nearly as fast as statically compiled IL code. Extensive use of expression trees, compiled to IL and then into native code. Multiple levels of caching, the first of which executes immediately when the dynamic callsite is invoked. And a clever re-use of compiled expression trees that can be used in completely different contexts without being recompiled. All in all, a very fast and very clever reflection caching mechanism.

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globals and locals in python exec()

- by hawkettc

Hi, I'm trying to run a piece of python code using exec. my_code = """ class A(object): pass print 'locals: %s' % locals() print 'A: %s' % A class B(object): a_ref = A """ global_env = {} local_env = {} my_code_AST = compile(my_code, "My Code", "exec") exec(my_code_AST, global_env, local_env) print local_env which results in the following output locals: {'A': <class 'A'>} A: <class 'A'> Traceback (most recent call last): File "python_test.py", line 16, in <module> exec(my_code_AST, global_env, local_env) File "My Code", line 8, in <module> File "My Code", line 9, in B NameError: name 'A' is not defined However, if I change the code to this - my_code = """ class A(object): pass print 'locals: %s' % locals() print 'A: %s' % A class B(A): pass """ global_env = {} local_env = {} my_code_AST = compile(my_code, "My Code", "exec") exec(my_code_AST, global_env, local_env) print local_env then it works fine - giving the following output - locals: {'A': <class 'A'>} A: <class 'A'> {'A': <class 'A'>, 'B': <class 'B'>} Clearly A is present and accessible - what's going wrong in the first piece of code? I'm using 2.6.5, cheers, Colin * UPDATE 1 * If I check the locals() inside the class - my_code = """ class A(object): pass print 'locals: %s' % locals() print 'A: %s' % A class B(object): print locals() a_ref = A """ global_env = {} local_env = {} my_code_AST = compile(my_code, "My Code", "exec") exec(my_code_AST, global_env, local_env) print local_env Then it becomes clear that locals() is not the same in both places - locals: {'A': <class 'A'>} A: <class 'A'> {'__module__': '__builtin__'} Traceback (most recent call last): File "python_test.py", line 16, in <module> exec(my_code_AST, global_env, local_env) File "My Code", line 8, in <module> File "My Code", line 10, in B NameError: name 'A' is not defined However, if I do this, there is no problem - def f(): class A(object): pass class B(object): a_ref = A f() print 'Finished OK' * UPDATE 2 * ok, so the docs here - http://docs.python.org/reference/executionmodel.html 'A class definition is an executable statement that may use and define names. These references follow the normal rules for name resolution. The namespace of the class definition becomes the attribute dictionary of the class. Names defined at the class scope are not visible in methods.' It seems to me that 'A' should be made available as a free variable within the executable statement that is the definition of B, and this happens when we call f(), but not when we use exec(). This can be more easily shown with the following - my_code = """ class A(object): pass print 'locals in body: %s' % locals() print 'A: %s' % A def f(): print 'A in f: %s' % A f() class B(object): a_ref = A """ which outputs locals in body: {'A': <class 'A'>} A: <class 'A'> Traceback (most recent call last): File "python_test.py", line 20, in <module> exec(my_code_AST, global_env, local_env) File "My Code", line 11, in <module> File "My Code", line 9, in f NameError: global name 'A' is not defined So I guess the new question is - why aren't those locals being exposed as free variables in functions and class definitions - it seems like a pretty standard closure scenario.

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how to bind input fields to a modal input fields AngularJS

- by user3919120

I have a form with a Customer and its properties populating input fields. If the user needs to change the Customer they click on the CustomerName input. A modal opens with a Customer List for them to choose from. There selection populates the input fields in that modal. I need to have that new information put in the already populated input fields. plunkr <div class="form-group"> <div class="input-group"> <span class="input-group-addon">C. Name</span> <input style="width:400px" ng-model="currentItem.CustomerName" class="form-control btn btn-default" ng-click="editJobCustomerModal()" /> </div> </div> <div class="form-group"> <div class="input-group"> <span class="input-group-addon">C. Address</span> <input style="width:390px" ng-model="currentItem.CustomerAddress" class="form-control" type="text"> </div> </div> Modal <div ng-controller="JobCtrl" data-backdrop="static" data-keyboard="false" class="modal fade" id="editJobCustomerModal" tabindex="-1" role="dialog" aria-labelledby="edit" aria-hidden="true"> <div class=" modal-dialog modal-editJobCustomer"> <div class="modal-content"> <div class="modal-header"> <h4 class="modal-title custom_align" id="Heading">Change Job Customer</h4> </div> <div class="modal-body"> <div class="container"> <form ng-submit="submitJob()" enctype="multipart/form-data"> <fieldset> <div class="col-md-8">  <div class="form-group"> <div class="input-group"> <span class="input-group-addon">C. Name</span> <input style="width:400px" ng-model="selectedCustomer.CustomerName" class="form-control" type="text" /> </div> </div> <div class="form-group"> <div class="input-group"> <span class="input-group-addon">C. Address</span> <input style="width:390px" ng-model="selectedCustomer.CustomerAddress" class="form-control" type="text"> </div> </div> </fieldset><br /> <input style="float:right" class="btn btn-danger" ng-click="" type="button" value="Update"/> <input style="float:right; margin-right:20px" type="button" class="btn btn-primary" data-dismiss="modal" value="Cancel" /> </form> </div> </div> </div> </div> </div>

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AWS S3 status code 403 SignatureDoesNotMatch - Check your key and signing method

- by Matt

i have checked a rechecked my keys and they are correct but i keep the below Exception whenever i try to upload, can anyone shed some light on this problem? 11-01 09:21:26.331: W/System.err(13934): AmazonS3Exception: Status Code: 403, AWS Service: Amazon S3, AWS Request ID: B97CC81E13D81XXX, AWS Error Code: SignatureDoesNotMatch, AWS Error Message: The request signature we calculated does not match the signature you provided. Check your key and signing method., S3 Extended Request ID: PPieuQpqElIizNBQPc42JwC4WnBkUciCKRT5S4HSftBraeacN8y0lKfsVP9LXXXX 11-01 09:21:26.331: W/System.err(13934): at com.amazonaws.http.AmazonHttpClient.handleErrorResponse(AmazonHttpClient.java:659) 11-01 09:21:26.331: W/System.err(13934): at com.amazonaws.http.AmazonHttpClient.executeHelper(AmazonHttpClient.java:330) 11-01 09:21:26.331: W/System.err(13934): at com.amazonaws.http.AmazonHttpClient.execute(AmazonHttpClient.java:182) 11-01 09:21:26.331: W/System.err(13934): at com.amazonaws.services.s3.AmazonS3Client.invoke(AmazonS3Client.java:3038) 11-01 09:21:26.331: W/System.err(13934): at com.amazonaws.services.s3.AmazonS3Client.putObject(AmazonS3Client.java:1218) 11-01 09:21:26.331: W/System.err(13934): at com.apprssd.capsule.S3UploaderActivity$S3PutObjectTask.doInBackground(S3UploaderActivity.java:165) 11-01 09:21:26.331: W/System.err(13934): at com.apprssd.capsule.S3UploaderActivity$S3PutObjectTask.doInBackground(S3UploaderActivity.java:1) 11-01 09:21:26.331: W/System.err(13934): at android.os.AsyncTask$2.call(AsyncTask.java:287) 11-01 09:21:26.331: W/System.err(13934): at java.util.concurrent.FutureTask.run(FutureTask.java:234) 11-01 09:21:26.341: W/System.err(13934): at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:230) 11-01 09:21:26.341: W/System.err(13934): at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1080) 11-01 09:21:26.341: W/System.err(13934): at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:573) 11-01 09:21:26.341: W/System.err(13934): at java.lang.Thread.run(Thread.java:841) It happens during the below. PutObjectRequest por = new PutObjectRequest( Constants.getDataBucket(), selectedZip.toString(), selectedZip); s3Client.putObject(por);

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PHP Codeigniter error: call to undefined method ci_db_mysql_driver::result()

- by Ronnie

I was trying to create an xml response using codeigniter. The following error gets thrown when i run the code. This page contains the following errors: error on line 1 at column 48: Extra content at the end of the document <?php class Api extends CI_Controller{ function index() { $this->load->helper('url', 'xml', 'security'); echo '<em>oops! no parameters selected.</em>'; } function authorize($email = 'blank', $password = 'blank') { header ("content-type: text/xml"); echo '<?xml version="1.0" encoding="ISO-8859-1"?>'; echo '<node>'; if ($email == 'blank' AND $password == 'blank') { echo '<response>failed</response>'; } else { $this->db->where('email_id', $email); $this->db->limit(1); $query = $this->db->from('lp_user_master'); $this->get(); $count = $this->db->count_all_results(); if ($count > 0) { foreach ($query->result() as $row){ echo '<ip>'.$row->title.'</ip>'; } } } echo '</node>'; } } ?>

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WebClient on WP7 - Throw "A request with this method cannot have a request body"

- by Peter Hansen

If I execute this code in a Consoleapp it works fine: string uriString = "http://url.com/api/v1.0/d/" + Username + "/some?amount=3&offset=0"; WebClient wc = new WebClient(); wc.Headers["Content-Type"] = "application/json"; wc.Headers["Authorization"] = AuthString.Replace("\\", ""); string responseArrayKvitteringer = wc.DownloadString(uriString); Console.WriteLine(responseArrayKvitteringer); But if I move the code to my WP7 project like this: string uriString = "http://url.com/api/v1.0/d/" + Username + "/some?amount=3&offset=0"; WebClient wc = new WebClient(); wc.Headers["Content-Type"] = "application/json"; wc.Headers["Authorization"] = AuthString.Replace("\\", ""); wc.DownloadStringCompleted += new DownloadStringCompletedEventHandler(wc_DownloadStringCompleted); wc.DownloadStringAsync(new Uri(uriString)); void wc_DownloadStringCompleted(object sender, DownloadStringCompletedEventArgs e) { MessageBox.Show(e.Result); } I got the exception: A request with this method cannot have a request body. Why? The solution is to remove the Content-type: string uriString = "http://url.com/api/v1.0/d/" + Username + "/some?amount=3&offset=0"; WebClient wc = new WebClient(); //wc.Headers["Content-Type"] = "application/json"; wc.Headers["Authorization"] = AuthString.Replace("\\", ""); wc.DownloadStringCompleted += new DownloadStringCompletedEventHandler(wc_DownloadStringCompleted); wc.DownloadStringAsync(new Uri(uriString)); void wc_DownloadStringCompleted(object sender, DownloadStringCompletedEventArgs e) { MessageBox.Show(e.Result); }

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JQuery Json error: Object doesn't support this property or method

- by Abu Hamzah

ERROR: Microsoft JScript runtime error: Object doesn't support this property or method i am using WCF service to pull the data and its very simple for the purpose of test and it does returning me the data from wcf service but it fails on json2.js on line number 314-316 // We split the first stage into 4 regexp operations in order to work around // crippling inefficiencies in IE's and Safari's regexp engines. First we // replace all backslash pairs with '@' (a non-JSON character). Second, we // replace all simple value tokens with ']' characters. Third, we delete all // open brackets that follow a colon or comma or that begin the text. Finally, // we look to see that the remaining characters are only whitespace or ']' or // ',' or ':' or '{' or '}'. If that is so, then the text is safe for eval. if (/^[\],:{}\s]*$/.test(text.replace(/\\["\\\/bfnrtu]/g, '@'). replace(/"[^"\\\n\r]*"|true|false|null|-?\d+(?:\.\d*)?(?:[eE][+\-]?\d+)?/g, ']'). replace(/(?:^|:|,)(?:\s*\[)+/g, ''))) { here is what i am doing function serviceProxy(wjOrderServiceURL) { var _I = this; this.ServiceURL = wjOrderServiceURL; // *** Call a wrapped object this.invoke = function (options) { // Default settings var settings = { serviceMethod: '', data: null, callback: null, error: null, type: "POST", processData: false, contentType: "application/json", dataType: "text", bare: false }; if (options) { $.extend(settings, options); } function GetFederalHolidays() { $("#dContacts1").empty().html('Searching for Active Contacts...'); ContactServiceProxy.invoke({ serviceMethod: "Holidays", callback: function (response) { // ProcessActiveContacts1(response); debugger }, error: function (xhr, errorMsg, thrown) { postErrorAndUnBlockUI(xhr, errorMsg, thrown); } }); } any help what iam doing wrong? i try to change from dataType: text to json but i get the same error above.

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Calling C# object method from IronPython

- by Jason

I'm trying to embed a scripting engine in my game. Since I'm writing it in C#, I figured IronPython would be a great fit, but the examples I've been able to find all focus on calling IronPython methods in C# instead of C# methods in IronPython scripts. To complicate things, I'm using Visual Studio 2010 RC1 on Windows 7 64 bit. IronRuby works like I expect it would, but I'm not very familiar with Ruby or Python syntax. What I'm doing: ScriptEngine engine = Python.CreateEngine(); ScriptScope scope = engine.CreateScope(); //Test class with a method that prints to the screen. scope.SetVariable("test", this); ScriptSource source = engine.CreateScriptSourceFromString("test.SayHello()", Microsoft.Scripting.SourceCodeKind.Statements); source.Execute(scope); This generates an error, "'TestClass' object has no attribute 'SayHello'" This exact set up works fine with IronRuby though using "self.test.SayHello()" I'm wary using IronRuby though because it doesn't appear as mature as IronPython. If it's close enough, I might go with that though. Any ideas? I know this has to be something simple.

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Sharepoint Lists.GetListItems Method rowLimit problem

- by Linda

In SharePoint I am using the default view of a list. When I use GetListItems method I can pass into it the following: public XmlNode GetListItems ( string listName, string viewName, XmlNode query, XmlNode viewFields, string rowLimit, XmlNode queryOptions, string webID ) I am passing in "" for the viewName and am passing a rowLimit of 1000. By Default view only returns 100 items. 100 Items are still being returned not 1000. Can you use the rowLimit when not specifying a view? Is it possible to bring back 1000 items using the query instead? I do not really want to use a GUID for the viewName as I would have to look it up for each list and perform a big refactor. Update I am now using the guid of the view and my list still returns the incorrect number of items. I know the guid is being used as I sued an incorrect one and it errord out. Any ideas what could be wrong? The code that is being sent to the service is as follows: <GetListItems xmlns='http://schemas.microsoft.com/sharepoint/soap/'> <listName>Media Outlet</listName> <viewName>{2822F0D9-A905-44B5-8913-34E6497F1AAF}</viewName> <query><Query><Where><Eq><FieldRef Name='Outlet_x0020_Type' /><Value Type='Lookup'></Value></Eq></Where><OrderBy><FieldRef Name='Title' /></OrderBy></Query></query> <ViewFields></ViewFields> <RowLimit>10000</RowLimit> <QueryOptions></QueryOptions> <webID></webID> </GetListItems>

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Android "single top" launch mode and onNewIntent method

- by Rich

I read in the Android documentation that by setting my Activity's launchMode property to singleTop OR by adding the FLAG_ACTIVITY_SINGLE_TOP flag to my Intent, that calling startActivity(intent) would reuse a single Activity instance and give me the Intent in the onNewIntent callback. I did both of these things, and onNewIntent never fires and onCreate fires every time. The docs also say that this.getIntent() returns the intent that was first passed to the Activity when it was first created. In onCreate I'm calling getIntent and I'm getting a new one every time (I'm creating the intent object in another activity and adding an extra to it...this extra should be the same every time if it was returning me the same intent object). All this leads me to believe that my activity is not acting like a "single top", and I don't understand why. To add some background in case I'm simply missing a required step, here's my Activity declaration in the manifest and the code I'm using to launch the activity. The Activity itself doesn't do anything worth mentioning in regards to this: in AndroidManifest.xml: <activity android:name=".ArtistActivity" android:label="Artist" android:launchMode="singleTop"> </activity> in my calling Activity: Intent i = new Intent(); i.putExtra(EXTRA_KEY_ARTIST, id); i.setClass(this, ArtistActivity.class); i.addFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP); startActivity(i);

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How to create a dynamic Linq Join extension method

- by Royd Brayshay

There was a library of dynamic Linq extensions methods released as a sample with VS2008. I'd like to extend it with a Join method. The code below fails with a parameter miss match exception at run time. Can anyone find the problem? public static IQueryable Join(this IQueryable outer, IEnumerable inner, string outerSelector, string innerSelector, string resultsSelector, params object[] values) { if (inner == null) throw new ArgumentNullException("inner"); if (outerSelector == null) throw new ArgumentNullException("outerSelector"); if (innerSelector == null) throw new ArgumentNullException("innerSelector"); if (resultsSelector == null) throw new ArgumentNullException("resultsSelctor"); LambdaExpression outerSelectorLambda = DynamicExpression.ParseLambda(outer.ElementType, null, outerSelector, values); LambdaExpression innerSelectorLambda = DynamicExpression.ParseLambda(inner.AsQueryable().ElementType, null, innerSelector, values); ParameterExpression[] parameters = new ParameterExpression[] { Expression.Parameter(outer.ElementType, "outer"), Expression.Parameter(inner.AsQueryable().ElementType, "inner") }; LambdaExpression resultsSelectorLambda = DynamicExpression.ParseLambda(parameters, null, resultsSelector, values); return outer.Provider.CreateQuery( Expression.Call( typeof(Queryable), "Join", new Type[] { outer.ElementType, inner.AsQueryable().ElementType, outerSelectorLambda.Body.Type, innerSelectorLambda.Body.Type, resultsSelectorLambda.Body.Type }, outer.Expression, inner.AsQueryable().Expression, Expression.Quote(outerSelectorLambda), Expression.Quote(innerSelectorLambda), Expression.Quote(resultsSelectorLambda))); } I've now fixed it myself, here's the answer. Please vote it up or add a better one.

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JQuery UI function errors out: Object is not a property or method

- by Luke101

In the following code I get an error that says autocomplete function Object is not a property or method Here is the code: <title><%= ViewData["pagetitle"] + " | " + config.Sitename.ToString() %></title> <script src="../../Scripts/jqueryui/jquery-ui-1.8.1.custom/development-bundle/ui/minified/jquery.ui.core.min.js" type="text/javascript"></script> <script src="../../Scripts/jqueryui/jquery-ui-1.8.1.custom/development-bundle/ui/minified/jquery.ui.core.min.js" type="text/javascript"></script> <script src="../../Scripts/jqueryui/jquery-ui-1.8.1.custom/development-bundle/ui/jquery.ui.widget.js" type="text/javascript"></script> <script src="../../Scripts/jqueryui/jquery-ui-1.8.1.custom/development-bundle/ui/jquery.ui.position.js" type="text/javascript"></script> <script src="../../Scripts/jqueryui/jquery-ui-1.8.1.custom/development-bundle/ui/jquery.ui.autocomplete.js" type="text/javascript"></script> <script language="javascript" type="text/javascript" src="/Scripts/main.js"></script> <script language="javascript" type="text/javascript"> $(document).ready(function () { Categories(); $('#tags1').autocomplete({ //error here url: '/Tag/TagAutoComplete', width: 320, max: 4, delay: 30, cacheLength: 1, scroll: false, highlight: false }); }); </script>

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Asp.net MVC Route class that supports catch-all parameter anywhere in the URL

- by Robert Koritnik

the more I think about it the more I believe it's possible to write a custom route that would consume these URL definitions: {var1}/{var2}/{var3} Const/{var1}/{var2} Const1/{var1}/Const2/{var2} {var1}/{var2}/Const as well as having at most one greedy parameter on any position within any of the upper URLs like {*var1}/{var2}/{var3} {var1}/{*var2}/{var3} {var1}/{var2}/{*var3} There is one important constraint. Routes with greedy segment can't have any optional parts. All of them are mandatory. Example This is an exemplary request http://localhost/Show/Topic/SubTopic/SubSubTopic/123/This-is-an-example This is URL route definition {action}/{*topicTree}/{id}/{title} Algorithm Parsing request route inside GetRouteData() should work like this: Split request into segments: Show Topic SubTopic SubSubTopic 123 This-is-an-example Process route URL definition starting from the left and assigning single segment values to parameters (or matching request segment values to static route constant segments). When route segment is defined as greedy, reverse parsing and go to the last segment. Parse route segments one by one backwards (assigning them request values) until you get to the greedy catch-all one again. When you reach the greedy one again, join all remaining request segments (in original order) and assign them to the greedy catch-all route parameter. Questions As far as I can think of this, it could work. But I would like to know: Has anyone already written this so I don't have to (because there are other aspects to parsing as well that I didn't mention (constraints, defaults etc.) Do you see any flaws in this algorithm, because I'm going to have to write it myself if noone has done it so far. I haven't thought about GetVirtuaPath() method at all.

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VS2010 RC: Add new domain service class wizard entities list is empty

- by Matthew

Greetings! I am going through Brad Abrams' SL4 + RIA Services series. Right now I am here: http://blogs.msdn.com/brada/archive/2010/03/15/silverlight-4-ria-services-ready-for-business-exposing-data-from-entity-framework.aspx. When I get to the "add domain service" step and the wizard asks you what entities you want to expose, the list is empty. The dropdown that let's me choose my Entity data context is there and the "DishViewEntities" is selected but it is not showing the "Restaurant" and "Plate" entities in the list below like it does in the picture. I found this thread here: http://forums.silverlight.net/forums/t/168724.aspx. The poster has the same problem as me. I have restarted VS, rebooted, regenerated the EDMX, tried creating it in different folders. Still the list is empty. When it is empty, it will not allow me to select individual entities or generate the class. Any ideas from the community? Thanks!

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Schliemann's method of programming language learning

- by DVK

Background: 19th-century German archeologist Heinrich Schliemann was of course famous for his successful quest to find and excavate the city of Troy (an actual archeological site for the Troy of Homer's Iliad). However, he is just as famous for being an astonishing learner of languages - within the space of two years, he taught himself fluent Dutch, English, French, Spanish, Italian and Portuguese, and later went on to learn seven more, including both modern and ancient Greek. One of the methods he famously used was comparison of a known text, e.g. take a book in a language one is fluent in, take a good translation of a book in a language you wish to learn, and go over them in parallel. (various sources cited the book used by Schliemann to be the Bible, or, as the link above states, a novel). Now, for the actual question. Has anyone used (or heard of) an equivalent of Schliemann's method for learning a new programming language? E.g. instead of basing the leaning on references and tutorials, take a somewhat comprehensive set of programs known to have high-quality code in both languages implementing similar/identical algorithms and learn by comparing them? I'm curious about either personal experiences of applying such an approach, or references to something published, or existance of codebases which could be used for such an approach? What got me thinking about the idea was Project Euler and some code snippets I saw on SO, in C++, Perl and Lisp.

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java.lang.VerifyError on method that worked a minute ago

- by Travis

Apologies in advance but I have never seen this error before and don't know what to include. I am using NetBeans and suddenly began getting this error: Exception in thread "AWT-EventQueue-0" java.lang.VerifyError: (class: market/CostOperations, method: <init> signature: ()V) Constructor must call super() or this() at Bluebuild.Main.refreshTables(Main.java:748) at Bluebuild.Main.formComponentShown(Main.java:649) at Bluebuild.Main.access$100(Main.java:28) at Bluebuild.Main$2.componentShown(Main.java:374) at java.awt.Component.processComponentEvent(Component.java:6095) at java.awt.Component.processEvent(Component.java:6043) at java.awt.Container.processEvent(Container.java:2041) at java.awt.Window.processEvent(Window.java:1836) at java.awt.Component.dispatchEventImpl(Component.java:4630) at java.awt.Container.dispatchEventImpl(Container.java:2099) at java.awt.Window.dispatchEventImpl(Window.java:2478) at java.awt.Component.dispatchEvent(Component.java:4460) at java.awt.EventQueue.dispatchEvent(EventQueue.java:599) at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269) at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184) at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161) at java.awt.EventDispatchThread.run(EventDispatchThread.java:122) I have not a clue what happened. I didn't even modify market/CostOperations. Here's the constructor though: public CostOperations() throws ParserConfigurationException, SAXException, IOException { //Open the xml file DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance(); DocumentBuilder builder = factory.newDocumentBuilder(); f = new File(dbName); doc = builder.parse(f); System.out.println(f.canWrite()); //Create the XPath XPathFactory xpfactory = XPathFactory.newInstance(); path = xpfactory.newXPath(); } In Debug Mode I get this: debug: Have no FileObject for C:\Program Files (x86)\Java\jdk1.6.0_20\jre\lib\sunrsasign.jar Have no FileObject for C:\Program Files (x86)\Java\jdk1.6.0_20\jre\classes I just need to know what is causing the error and how to fix it. Thanks!

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