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  • How to check for mutual existence of Fields in same table in Two columns

    - by ranabra
    I tried using "Exist" and "IN". Not only did I not succeed, it didn't seem as an efficient solution. Here is a simplified example: TblMyTable WorkerUserName  -  WorkerDegree  -  ManagerUserName  -  ManagerDegree I need a query where there is a mutual connection / existence. What I mean is only where the worker, ex. "John" has a manager named "Mary", and where Mary the manager has a worker named "John". John the worker can have several managers and Mary the manager can have several workers. So the result will be (the order doesn't matter) ideally in one line: John - BSc  --  Mary - M.A. or Mary - M.A.  --  John - BSc The punchline is it's only one table. it is not really managers and workers, this is just a simplification of the situation. In the real situation both are equal, in a Table of names of users working with other users. Database is SQL 2005. Many thanx in advance  

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  • shell scripting: search/replace & check file exist

    - by johndashen
    I have a perl script (or any executable) E which will take a file foo.xml and write a file foo.txt. I use a Beowulf cluster to run E for a large number of XML files, but I'd like to write a simple job server script in shell (bash) which doesn't overwrite existing txt files. I'm currently doing something like #!/bin/sh PATTERN="[A-Z]*0[1-2][a-j]"; # this matches foo in all cases todo=`ls *.xml | grep $PATTERN -o`; isdone=`ls *.txt | grep $PATTERN -o`; whatsleft=todo - isdone; # what's the unix magic? #tack on the .xml prefix with sed or something #and then call the job server; jobserve E "$whatsleft"; and then I don't know how to get the difference between $todo and $isdone. I'd prefer using sort/uniq to something like a for loop with grep inside, but I'm not sure how to do it (pipes? temporary files?) As a bonus question, is there a way to do lookahead search in bash grep? To clarify: so the simplest way to do what i'm asking is (in pseudocode) for i in `/bin/ls *.xml` do replace xml suffix with txt if [that file exists] add to whatsleft list end done

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  • ASP .NET Code analysis tool to check cross site scripting

    - by Prashant
    I am aware of a tool which MS has provided which tells you about coss site scripting attack etc. The tool is http://www.microsoft.com/downloads/details.aspx?FamilyId=0178e2ef-9da8-445e-9348-c93f24cc9f9d&displaylang=en But are there tools which you have used for ASP .NET applications which do similar to this and which one is widely used in ASP .Net applications ?

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  • C#, AES encryption check!

    - by Data-Base
    I have this code for AES encryption, can some one verify that this code is good and not wrong? it works fine, but I'm more concern about the implementation of the algorithm // Plaintext value to be encrypted. //Passphrase from which a pseudo-random password will be derived. //The derived password will be used to generate the encryption key. //Password can be any string. In this example we assume that this passphrase is an ASCII string. //Salt value used along with passphrase to generate password. //Salt can be any string. In this example we assume that salt is an ASCII string. //HashAlgorithm used to generate password. Allowed values are: "MD5" and "SHA1". //SHA1 hashes are a bit slower, but more secure than MD5 hashes. //PasswordIterations used to generate password. One or two iterations should be enough. //InitialVector (or IV). This value is required to encrypt the first block of plaintext data. //For RijndaelManaged class IV must be exactly 16 ASCII characters long. //KeySize. Allowed values are: 128, 192, and 256. //Longer keys are more secure than shorter keys. //Encrypted value formatted as a base64-encoded string. public static string Encrypt(string PlainText, string Password, string Salt, string HashAlgorithm, int PasswordIterations, string InitialVector, int KeySize) { byte[] InitialVectorBytes = Encoding.ASCII.GetBytes(InitialVector); byte[] SaltValueBytes = Encoding.ASCII.GetBytes(Salt); byte[] PlainTextBytes = Encoding.UTF8.GetBytes(PlainText); PasswordDeriveBytes DerivedPassword = new PasswordDeriveBytes(Password, SaltValueBytes, HashAlgorithm, PasswordIterations); byte[] KeyBytes = DerivedPassword.GetBytes(KeySize / 8); RijndaelManaged SymmetricKey = new RijndaelManaged(); SymmetricKey.Mode = CipherMode.CBC; ICryptoTransform Encryptor = SymmetricKey.CreateEncryptor(KeyBytes, InitialVectorBytes); MemoryStream MemStream = new MemoryStream(); CryptoStream CryptoStream = new CryptoStream(MemStream, Encryptor, CryptoStreamMode.Write); CryptoStream.Write(PlainTextBytes, 0, PlainTextBytes.Length); CryptoStream.FlushFinalBlock(); byte[] CipherTextBytes = MemStream.ToArray(); MemStream.Close(); CryptoStream.Close(); return Convert.ToBase64String(CipherTextBytes); } public static string Decrypt(string CipherText, string Password, string Salt, string HashAlgorithm, int PasswordIterations, string InitialVector, int KeySize) { byte[] InitialVectorBytes = Encoding.ASCII.GetBytes(InitialVector); byte[] SaltValueBytes = Encoding.ASCII.GetBytes(Salt); byte[] CipherTextBytes = Convert.FromBase64String(CipherText); PasswordDeriveBytes DerivedPassword = new PasswordDeriveBytes(Password, SaltValueBytes, HashAlgorithm, PasswordIterations); byte[] KeyBytes = DerivedPassword.GetBytes(KeySize / 8); RijndaelManaged SymmetricKey = new RijndaelManaged(); SymmetricKey.Mode = CipherMode.CBC; ICryptoTransform Decryptor = SymmetricKey.CreateDecryptor(KeyBytes, InitialVectorBytes); MemoryStream MemStream = new MemoryStream(CipherTextBytes); CryptoStream cryptoStream = new CryptoStream(MemStream, Decryptor, CryptoStreamMode.Read); byte[] PlainTextBytes = new byte[CipherTextBytes.Length]; int ByteCount = cryptoStream.Read(PlainTextBytes, 0, PlainTextBytes.Length); MemStream.Close(); cryptoStream.Close(); return Encoding.UTF8.GetString(PlainTextBytes, 0, ByteCount); } Thank you

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  • Localization — how to check that Filename1 and Filename2 are the same

    - by modosansreves
    I want to know that Filename1, provided by the user is the same as stored in DB (Filename2). I was about to use string.Equals(Filename1, Filename2, StringComparison.CurrentCultureIgnoreCase) but then I doubted whether I should use StringComparison.InvariantCultureIgnoreCase. Obviously, I need to do this the same way OS does, or use appropriate API. In some cultures, AFAIK, characters (e.g. vocals) may change if the next one is Capitalized. As I primarily target English-speaking market, I'd like my software to work well throughout the world.

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  • How to read dynamical added check box?

    - by Manoj
    Hi, I am adding checkboxes dynamically to silverlight stackpanel object as follows: foreach (String userName in e.Result) { CheckBox ch = new CheckBox(); ch.Name = userName; ch.Content = userName; ContentStackPanel.Children.Add(ch); } How do I read back those controls to detect which of them are checked.

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  • Regex to check that a character in range doesn't repeat

    - by Aly
    Hi, I want to match against Strings such as AhKs & AdKs (i.e. two cards Ah = Ace of Hearts). I want to match two off-suit cards with a regex, what I currently have is "^[AKQJT2-9][hscd]{2}$", but this could match hands such as AhKh (suited) and AhAh. Is there a way to possibly use backreferences to say the second [hscd] cannot be the same as the firs (similarly for [AKQJT2-9])

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  • Check if the internet cannot be accessed in Python

    - by Sridhar Ratnakumar
    I have an app that makes a HTTP GET request to a particular URL on the internet. But when the network is down (say, no public wifi - or my ISP is down, or some such thing), I get the following traceback at urllib.urlopen: 70, in get u = urllib2.urlopen(req) File "/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/urllib2.py", line 126, in urlopen return _opener.open(url, data, timeout) File "/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/urllib2.py", line 391, in open response = self._open(req, data) File "/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/urllib2.py", line 409, in _open '_open', req) File "/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/urllib2.py", line 369, in _call_chain result = func(*args) File "/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/urllib2.py", line 1161, in http_open return self.do_open(httplib.HTTPConnection, req) File "/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/urllib2.py", line 1136, in do_open raise URLError(err) URLError: <urlopen error [Errno 8] nodename nor servname provided, or not known> I want to print a friendly error to the user telling him that his network maybe down instead of this unfriendly "nodename nor servname provided" error message. Sure I can catch URLError, but that would catch every url error, not just the one related to network downtime. I am not a purist, so even an error message like "The server example.com cannot be reached; either the server is indeed having problems or your network connection is down" would be nice. How do I go about selectively catching such errors? (For a start, if DNS resolution fails at urllib.urlopen, that can be reasonably assumed as network inaccessibility? If so, how do I "catch" it in the except block?)

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  • How to check if TcpClient Connection is closed?

    - by Superdumbell
    I'm playing around with the TcpClient and I'm trying to figure out how to make the Connected property say false when a connection is dropped. I tried doing NetworkStream ns = client.GetStream(); ns.Write(new byte[1], 0, 0); But it still will not show me if the TcpClient is disconnected. How would you go about this using a TcpClient?

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  • how to check if there is a division by zero in c

    - by user244775
    #include<stdio.h> void function(int); int main() { int x; printf("Enter x:"); scanf("%d", &x); function(x); return 0; } void function(int x) { float fx; fx=10/x; if(10 is divided by zero)// I dont know what to put here please help printf("division by zero is not allowed"); else printf("f(x) is: %.5f",fx); }

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  • Check mail attachment

    - by comii
    Hi! I am using vb.net to display email from outlook express! Everything work fine but when some message has attachment, i can not display message that email has attachment! This is my code: Private Sub LoginButton_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles LoginButton.Click Dim oItem Dim i As Integer Dim Message As MAPI.Message Dim items As String() = New String(6) {} ' Items are the sender name,subject and date and read/unread value Dim PrSenderEmail, PrBodyEmail Session = CreateObject("MAPI.Session") ' we use a session object of MAPI Component Session.Logon(ProfileName:=Me.UserId.Text, ProfilePassword:=Me.Password.Text) Session.MAPIOBJECT = Session.MAPIOBJECT ' Folder = CObj(Session.Inbox) ' choose the folder Application = CreateObject("Outlook.Application") Namespace1 = Application.GetNamespace("MAPI") Namespace1.Logon() ' for getting the sender name and avoid security validation of Outlook/Exchange server 2003 ' we are using the "Redemption" component sItem = CreateObject("Redemption.SafeMailItem") Cursor.Current = Cursors.WaitCursor ' show we're busy doing the sort ListInbox.BeginUpdate() ' Notify that update begins ListInbox.Items.Clear() i = 0 ' first email message is 0 For Each Message In Folder.Messages Try i = i + 1 ' increment to the next email message 'get e-mail from the Inbox, can be any other item oItem = Application.Session.GetDefaultFolder(6).Items(i) ' GetDefaultFolder(6) refers to Inbox sItem.Item = oItem 'sItem is an object of Redemption COM and is used to get the senders name items(0) = sItem.SenderName() Catch items(0) = "error" End Try Dim objApp As Outlook.Application = New Outlook.Application 'Get Mapi NameSpace Dim objNS As Outlook.NameSpace = objApp.GetNamespace("MAPI") Dim oMsg As Outlook.MailItem Dim pp As String Dim b As Integer Dim objAttachment As Outlook.Attachment pp = Message.StoreID items(1) = Message.Subject items(2) = Message.TimeReceived items(4) = Message.Subject items(5) = Message.Size Dim objInbox As Outlook.MAPIFolder = objNS.GetDefaultFolder(Outlook.OlDefaultFolders.olFolderInbox) Dim objItems As Outlook.Items = objInbox.Items items(5) = Message.Size.ToString / 1000 & "kb" If Message.Unread = True Then items(3) = "unread" Else items(3) = "read" End If ListInbox.Items.Add(New ListViewItem(items)) Next ListInbox.EndUpdate() ' Notify that update ends Cursor.Current = Cursors.Default End If End Sub How I can display message that email has attachment?

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  • XML: Check if anything exists between two nodes

    - by sebastian
    Hi there, I need to find out if anything exists between two nodes. My XML looks like this: <event value1="1" value2="2" value3="3" <info="some info here"/> Line 1.</lb> Line 2.</lb></lb> Line 3.</lb> Line 4.</lb> </event> My goal is to convert the </lb> nodes to </br> HTML tags using XSLT. There is one additional requirement to fulfill though. In case there is one </lb> directly following another </lb> I want to output only one </br>. My XSLT looks like this: <xsl:template match="lb"> <xsl:if test="not(preceding-sibling::lb[1])"> <br/> </xsl:if> </xsl:template> The problem with the XSLT above is that it works correctly for line 1 only as the text between both nodes is ignored. Maybe someone here can help.

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  • Endian check in C

    - by webgenius
    Got this code snippet from some website: int num = 1; if(*(char *)&num == 1) { printf("\nLittle-Endian\n"); } else { printf("Big-Endian\n"); } Can anyone explain this step-by-step? &num - Adress of a (char *)&num - Type-cast address of a into a string *(char *)&num - Points to the first character of the string Am I missing anything here?

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  • C# check age of db Item

    - by Jacob Huggart
    Hello All, I am using C# to send an email with an encrypted link. The encrypted portion of the link contains a time stamp that needs to be used to verify if the link is more than 48 hours old. How do I compare an old time to the current time and find out if the old time is more than 48 hours ago? This is what I have now: var hours = DateTime.Now.Ticks - data.DTM.Value.Ticks; //data.DTM = stored time stamp if (hours.CompareTo(48) > 1) //if link is more than 48 hours old, deny access. return View("LinkExpired"); } Comparing ticks seems like it's a very backwards way to do it and I know that the hours.CompareTo would have to be adjusted if I stick with comparing ticks. How can I just get a value for the number of hours that have passed?

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  • Registration Form check PostgreSQL is username is already taken

    - by MrEnder
    Hey I'm really new to PHP and PostgreSQP or any database in that matter. So I'm at a loss how to do this. I need an if statement that says. If(the username user just typed in is already in database) { my code here } the variable the username that the user just typed in is $userNameSignup how would I do that with PHP for PostgreSQL? also how might I redirect people to a new page once they have completed the form properly? Thanks Shelby

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  • IsDouble check for string in Vb.net?

    - by James123
    I will get data in DataTable. I am going to iterate data in foreach. I will have all types of data in Datatable. Now I need to find Double for each item (string) in DataTable. How to find IsDouble for string? Ex: I have "21342.2121" string. I need to covert this to Double. But sometimes the data will be "TextString". So I can't use Double.Parse(). How to handle this?

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