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• Adding time zone hours difference to time

  - by Hwang

  I know there's a much better and correct way to do it, but i need a temporarily solutions. I need to add in extra hours to the time, and the day will change automatically too. How should I change the code below? package { public class getTime { private var today:Date=new Date(); private var hour:uint=today.getHours(); private var minute:uint=today.getMinutes(); private var month:uint=today.getMonth(); private var monthArray:Array=new Array('January','February','March','April','May','June','July','August','September','October','November','December'); private var time:String = getUSClockTime(today.getHours(), today.getMinutes()); public var dateNtime:String=(time+", " +today.getDate()+" "+monthArray[month]+" "+today.getFullYear());; public function getTime() { } private function getUSClockTime(hrs:uint, mins:uint):String { var modifier:String="PM"; var minLabel:String=doubleDigitFormat(mins); if (hrs>12) { hrs=hrs-12; } else if (hrs == 0) { modifier="AM"; hrs=12; } else if (hrs < 12) { modifier="AM"; } return (doubleDigitFormat(hrs) + ":" + minLabel + " " + modifier); } private function doubleDigitFormat(num):String { if (num<10) { return ("0" + num); } return num; } } }

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• Visual Studio Designer looses / ignores data

  - by Kempeth

  I'm writing my own control - a datagridviewcolumn that displays integer values as texts like the comboboxcolumn can but without showing the combobox unless the cell is edited. I'm mostly there but I have problems with the databinding. I managed to get the necessary properties to appear in the designer but every time I set the datasource and close the editor the changes are dropped. When I assign the same datasource later in code it works like a charm, I just would prefer not having to do that... public class DataGridViewLookupColumn : DataGridViewColumn { private DataGridViewLookupCell template; private Object datasource = null; private String displaymember = String.Empty; private String valuemember = String.Empty; private BindingSource bindingsource = new BindingSource(); public DataGridViewLookupColumn() : base() { this.template = new DataGridViewLookupCell(); } public override DataGridViewCell CellTemplate { get { return this.template; } set { } } [Category("Data")] [ DefaultValue(null), RefreshProperties(RefreshProperties.Repaint), AttributeProvider(typeof(IListSource)), DesignerSerializationVisibility(DesignerSerializationVisibility.Visible), ] public object DataSource { get { return this.bindingsource.DataSource; //return this.datasource; } set { this.bindingsource.DataSource = value; this.bindingsource.EndEdit(); } } [Category("Data")] [ DefaultValue(""), TypeConverterAttribute("System.Windows.Forms.Design.DataMemberFieldConverter, System.Design"), Editor("System.Windows.Forms.Design.DataMemberFieldEditor, System.Design", typeof(System.Drawing.Design.UITypeEditor)), DesignerSerializationVisibility(DesignerSerializationVisibility.Visible), ] public String DisplayMember { get { return this.displaymember; } set { this.displaymember = value; } } [Category("Data")] [ DefaultValue(""), TypeConverterAttribute("System.Windows.Forms.Design.DataMemberFieldConverter, System.Design"), Editor("System.Windows.Forms.Design.DataMemberFieldEditor, System.Design", typeof(System.Drawing.Design.UITypeEditor)), DesignerSerializationVisibility(DesignerSerializationVisibility.Visible), ] public String ValueMember { get { return this.valuemember; } set { this.valuemember = value; } } } EDIT: I experimenting I just found out that that original DataGridViewComboBoxColumn can be made to behave exactly like I wanted to. By setting the DisplayStyle to Nothing the combobox control is only shown in edit mode.

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• HSQLDB connection error

  - by user1478527

  I created a java program for connect the HSQLDB , the first one works well, public final static String DRIVER = "org.hsqldb.jdbcDriver"; public final static String URL = "jdbc:hsqldb:file:F:/hsqlTest/data/db"; public final static String DBNAME = "SA"; but these are not public final static String DRIVER = "org.hsqldb.jdbcDriver"; public final static String URL = "jdbc:hsqldb:file:C:/Program Files/tich Tools/mos tech/app/data/db/t1/t2/01/db"; public final static String DBNAME = "SA"; the error shows like this: java.sql.SQLException: error in script file line: 1 unexpected token: ? at org.hsqldb.jdbc.Util.sqlException(Unknown Source) at org.hsqldb.jdbc.Util.sqlException(Unknown Source) at org.hsqldb.jdbc.JDBCConnection.<init>(Unknown Source) at org.hsqldb.jdbc.JDBCDriver.getConnection(Unknown Source) at org.hsqldb.jdbc.JDBCDriver.connect(Unknown Source) at java.sql.DriverManager.getConnection(Unknown Source) at java.sql.DriverManager.getConnection(Unknown Source) at HSQLDBManagerImp.getconn(HSQLDBManagerImp.java:48) at TESTHSQLDB.main(TESTHSQLDB.java:15) Caused by: org.hsqldb.HsqlException: error in script file line: 1 unexpected token: ? at org.hsqldb.error.Error.error(Unknown Source) at org.hsqldb.scriptio.ScriptReaderText.readDDL(Unknown Source) at org.hsqldb.scriptio.ScriptReaderBase.readAll(Unknown Source) at org.hsqldb.persist.Log.processScript(Unknown Source) at org.hsqldb.persist.Log.open(Unknown Source) at org.hsqldb.persist.Logger.openPersistence(Unknown Source) at org.hsqldb.Database.reopen(Unknown Source) at org.hsqldb.Database.open(Unknown Source) at org.hsqldb.DatabaseManager.getDatabase(Unknown Source) at org.hsqldb.DatabaseManager.newSession(Unknown Source) ... 7 more Caused by: org.hsqldb.HsqlException: unexpected token: ? at org.hsqldb.error.Error.parseError(Unknown Source) at org.hsqldb.ParserBase.unexpectedToken(Unknown Source) at org.hsqldb.ParserCommand.compilePart(Unknown Source) at org.hsqldb.ParserCommand.compileStatement(Unknown Source) at org.hsqldb.Session.compileStatement(Unknown Source) ... 16 more I googled this connection question , but most of them not help much, someone says that may be the HSQLDB version problem. The dbase shut down in "SHUT COMPRESS" model. Anyone give some advice?

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• Locking behaviour is different via network shares

  - by MattH

  I have been trying to lock a file so that other cloned services cannot access the file. I then read the file, and then move the file when finished. The Move is allowed by using FileShare.Delete. However in later testing, we found that this approach does not work if we are looking at a network share. I appreciate my approach may not have been the best, but my specific question is: Why does the below demo work against the local file, but not against the network file? The more specific you can be the better, as I've found very little information in my searches that indicates network shares behave differently to local disks. string sourceFile = @"C:\TestFile.txt"; string localPath = @"C:\MyLocalFolder\TestFile.txt"; string networkPath = @"\\MyMachine\MyNetworkFolder\TestFile.txt"; File.WriteAllText(sourceFile, "Test data"); if (!File.Exists(localPath)) File.Copy(sourceFile, localPath); foreach (string path in new string[] { localPath, networkPath }) { using (FileStream fsLock = File.Open(path, FileMode.Open, FileAccess.ReadWrite, (FileShare.Read | FileShare.Delete))) { string target = path + ".out"; File.Move(path, target); //This is the point of failure, when working with networkPath if (File.Exists(target)) File.Delete(target); } if (!File.Exists(path)) File.Copy(sourceFile, path); }

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• How to implement Session timeout in Web Server Side?

  - by Morgan Cheng

  I beheld a web framework implementing in-memory session in this way. The session object is added to Cache with timeout. When the time is out, the session is removed from Cache automatically. To protect race condition, each request should acquire lock on given session object to proceed. Each request will "touch" the session in Cache to refresh the timeout. Everything looks fine, until this scenario is discovered. Say, one operation takes a long time, longer than timeout. Another request comes and wait on session lock which is currently hold by the long-time request. Finally, the long-time request is over, it releases the lock. But, since it already takes longer time than timeout, the session object is already removed from Cache. This is obvious because the only request holding the lock doesn't have a chance to "touch" the session object in cache. The second request gets the lock but cannot retrieve the expired Session object. Oops... To fix this issue, the second request has to re-create the Session object. But, this is just like digging a buried dead body from tomb and try to bring it back to life. It causes buggy code. I'm wondering what's the best way to implement timeout in session to handle such scenario. I know that current platform must have good session mechanism. I just want to know the under-the-hood how.

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• DRY Authenticated Tasks in Cocoa (with distributed objects)

  - by arbales

  I'm kind of surprise/infuriated that the only way for me to run an authenticated task, like perhaps sudo gem install shi*t, is to make a tool with pre-written code. I'm writing a MacRuby application, which doesn't seem to expose the KAuthorization* constants/methods. So.. I learned Cocoa and Objective-C. My application creates a object, serves it and calls the a tool that elevates itself and then performs a selector on a distributed object (in the tool's thread). I hoped that the distributed object's methods would evaluated inside the tool, so I could use delegation to create "privileged" tasks. If this won't work, don't try to save it, I just want a DRY/cocoa solution. AuthHelper.m //AuthorizationExecuteWithPrivileges of this. AuthResponder* my_responder = [AuthResponder sharedResponder]; // Gets the proxy object (and it's delegate) NSString *selector = [NSString stringWithUTF8String:argv[3]]; NSLog(@"Performing selector: %@", selector); setuid(0); if ([[my_responder delegate] respondsToSelector:NSSelectorFromString(selector)]){ [[my_responder delegate] performSelectorOnMainThread:NSSelectorFromString(selector) withObject:nil waitUntilDone:YES]; } RandomController.m - (void)awakeFromNib { helperToolPath = [[[NSBundle mainBundle] resourcePath] stringByAppendingString:@"/AuthHelper"]; delegatePath = [[[NSBundle mainBundle] resourcePath] stringByAppendingString:@"/ABExtensions.rb"]; AuthResponder* my_responder = [AuthResponder initAsService]; [my_responder setDelegate:self]; } -(oneway void)install_gems{ NSArray *args = [NSArray arrayWithObjects: @"gem", @"install", @"sinatra", nil]; [NSTask launchedTaskWithLaunchPath:@"/usr/bin/sudo" arguments:args]; NSLog(@"Ran AuthResponder.delegate.install_gems"); // This prints. } ... other privileges tasks. "sudo gem update --system" for one. I'm guessing the proxy object is performing the selector in it's own thread, but I want the current (privileged thread) to do it so I can use sudo. Can I force the distributed object to evaluate the selector on the tool's thread? How else can I accomplish this dryly/cocoaly?

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• SyntaxHighlighter and Line Break Tags

  - by azamsharp

  I am using the following syntax highligher: http://alexgorbatchev.com/wiki/SyntaxHighlighter For some reason when it encounter <br> it simply prints out <br> tags. I cannot replace the whole thing with System.Environment.NewLine since it will mess up the complete description. Here is my code: public static string GetDescription(string description) { string codeStartPattern = "&lt;code&gt;"; string codeEndPattern = "&lt;/code&gt;"; Regex reg = new Regex(codeStartPattern); description = reg.Replace(description, ReplaceWithStartDiv); reg = new Regex(codeEndPattern); description = reg.Replace(description, ReplaceWithEndDiv); return description; } private static string ReplaceWithStartDiv(Match m) { return "<script type='syntaxhighlighter' class='brush: csharp'><![CDATA["; } private static string ReplaceWithEndDiv(Match m) { return "]]></script>"; } I guess I only need to replace <br> with System.Environment.Newline with the code that is between the <code> snippet here </code> Thanks!

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• Display an Android Sensors List

  - by Skatephone

  I'm trying to display a list of available sensors but it's like there are not! I was thinking that it was because of the emulator, but i tried it on the phone and the result is the same. private SensorManager mSensorManager; TextView mSensorsTot,mSensorAvailables; ...... public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); // Get the texts fields of the layout and setup to invisible mSensorsTot = (TextView) findViewById(R.id.sensoritot); mSensorAvailables = (TextView) findViewById(R.id.sensoridisponibili); // Get the SensorManager mSensorManager= (SensorManager) getSystemService(SENSOR_SERVICE); // List of Sensors Available List<Sensor> msensorList = mSensorManager.getSensorList(SensorManager.SENSOR_ALL); // Print how may Sensors are there mSensorsTot.setText(msensorList.size()+" "+this.getString(R.string.sensors)+"!"); // Print each Sensor available using sSensList as the String to be printed String sSensList = new String(""); Sensor tmp; int x,i; for (i=0;i<msensorList.size();i++){ tmp = msensorList.get(i); sSensList = " "+sSensList+tmp.getName(); // Add the sensor name to the string of sensors available } // if there are sensors available show the list if (i>0){ sSensList = getString(R.string.sensors)+":"+sSensList; mSensorAvailables.setText(sSensList); } } Thank's Valerio From Italy :)

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• Grails - Recursive computing call "StackOverflowError" and don't update on show

  - by Kedare

  Hello, I have a little problem, I have made a Category domain on Grails, but I want to "cache" the string representation on the database by generating it when the representation field is empty or NULL (to avoid recursive queries at each toString), here is the code : package devkedare class Category { String title; String description; String representation; Date dateCreated; Date lastUpdate; Category parent; static constraints = { title(blank:false, nullable:false, size:2..100); description(blank:true, nullable:false); dateCreated(nullable:true); lastUpdate(nullable:true); autoTimestamp: true; } static hasMany = [childs:Category] @Override String toString() { if((!this.representation) || (this.representation == "")) { this.computeRepresentation(true) } return this.representation; } String computeRepresentation(boolean updateChilds) { if(updateChilds) { for(child in this.childs) { child.representation = child.computeRepresentation(true); } } if(this.parent) { this.representation = "${this.parent.computeRepresentation(false)}/${this.title}"; } else { this.representation = this.title } return this.representation; } void beforeUpdate() { this.computeRepresentation(true); } } There is 2 problems : It don't update the representation when the representation if NULL or empty and toString id called, it only update it on save, how to fix that ? On some category, updating it throw a StackOverflowError, here is an example of my actual category table as CSV : Uploaded the csv file here, pasting csv looks buggy: http://kedare.free.fr/Dist/01.csv Updating the representation works everywhere except on "IT" that throw a StackOverlowError (this is the only category that has many childs). Any idea of how can I fix those 2 problems ? Thank you !

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• CascadingDropDown taking two parameters...

  - by WeeShian

  I have a page with 3 dropdownlist, 2nd and 3rd dropdownlist are added with CascadingDropDown. 3rd dropdownlist will take parameters from 1st and 2nd dropdownlist. So, in current example for CascadingDropDown i have found from google, they are only passing one parameter to the WebService method. How can pass two parameters to the service method, so that my 3rd dropdownlist will based on the SelectedValue of 1st and 2nd dropdownlist? <WebMethod()> _ Public Function GetTeams(ByVal knownCategoryValues As String, ByVal category As String) As CascadingDropDownNameValue() Dim strConnection As String = ConfigurationManager.ConnectionStrings("nerdlinessConnection").ConnectionString Dim sqlConn As SqlConnection = New SqlConnection(strConnection) Dim strTeamQuery As String = "SELECT * FROM TEAM WHERE conf_id = @confid" Dim cmdFetchTeam As SqlCommand = New SqlCommand(strTeamQuery, sqlConn) Dim dtrTeam As SqlDataReader Dim kvTeam As StringDictionary = CascadingDropDown.ParseKnownCategoryValuesString(knownCategoryValues) Dim intConfId As Integer If Not kvTeam.ContainsKey("Conference") Or Not Int32.TryParse(kvTeam("Conference"), intConfId) Then Return Nothing End If cmdFetchTeam.Parameters.AddWithValue("@confid", intConfId) Dim myTeams As New List(Of CascadingDropDownNameValue) sqlConn.Open() dtrTeam = cmdFetchTeam.ExecuteReader While dtrTeam.Read() Dim strTeamName As String = dtrTeam("team_name").ToString Dim strTeamId As String = dtrTeam("team_id").ToString myTeams.Add(New CascadingDropDownNameValue(strTeamName, strTeamId)) End While Return myTeams.ToArray End Function This is the sample code i found! As you can see in the code, '@confid' will be passed from 2nd dropdownlist! So, hw do i modify this code to get the selected value from 1st dropdownlist as well??

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• Validation of viewstate MAC failed with nested master page

  - by just_name

  After I use a nested master page ,I face the following problem : Validation of viewstate MAC failed. If this application is hosted by a Web Farm or cluster, ensure that configuration specifies the same validationKey and validation algorithm. AutoGenerate cannot be used in a cluster. and sometimes Invalid related information [ViewStateException: Invalid viewstate. Client IP: 127.0.0.1 Port: User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:17.0) Gecko/20100101 Firefox/17.0 ViewState: /wEPDwULLTEzOTY5MjA1ODUPZBYCZg9kFgICAw9kFg4CAQ9kFgJmDxYCHgRocmVmBUZmcm1faXRlbXMyLmFzcHg/c3lzPURGJmdycD0xJmRiPTUmZW1wPTc1NCZmaXJzdFJlcXVlc3Q9dHJ1ZSZMaXN0VHlwZT0xFgICAQ8PFgIeBFRleHQFATFkZAIDDxYCHgVjbGFzcwUGYWN0aXZlFgJmDxYCHwAFRmZybV9pdGVtczIuYXNweD9zeXM9REYmZ3JwPTEmZGI9NSZlbXA9NzU0JmZpcnN0UmVxdWVzdD10cnVlJkxpc3RUeXBlPTIWAgIBDw8WAh8BBQI3OGRkAgUPZBYCZg8WAh8ABUZmcm1faXRlbXMyLmFzcHg/c3lzPURGJmdycD0xJmRiPTUmZW1wPTc1NCZmaXJzdFJlcXVlc3Q9dHJ1ZSZMaXN0VHlwZT0zFgICAQ8PFgIfAQUDODY0ZGQCBw9kFgJmDxYCHwAFRmZybV9pdGVtczIuYXNweD9zeXM9REYmZ3JwPTEmZGI9NSZlbXA9NzU0JmZpcnN0UmVxdWVzdD10cnVlJkxpc3RUeXBlPTQWAgIBDw8WAh8BBQEwZGQCCQ9kFgJmDxYCHwAFP2ZybV9Vc2VyVGFza3MyLmFzcHg/c3lzPURGJmdycD0xJmRiPTUmZW1wPTc1NCZmaXJzdFJlcXVlc3Q9dHJ1ZWQCCw9kFgJmDxYCHwAFN1NlYXJjaC5hc3B4P3N5cz1ERiZncnA9MSZkYj01JmVtcD03NTQmZmlyc3RSZXF1ZXN0PXRydWVkAg8PZBYMAgQPEA8WBh4ORGF0YVZhbHVlRmllbGQFCFRhc2tDb2RlHg1EYXRhVGV4dEZpZWxkBQhUYXNrTmFt...] [HttpException (0x80004005): Validation of viewstate MAC failed. If this application is hosted by a Web Farm or cluster, ensure that <machineKey> configuration specifies the same validationKey and validation algorithm. AutoGenerate cannot be used in a cluster.] System.Web.UI.ViewStateException.ThrowError(Exception inner, String persistedState, String errorPageMessage, Boolean macValidationError) +116 System.Web.UI.ViewStateException.ThrowMacValidationError(Exception inner, String persistedState) +13 System.Web.UI.ObjectStateFormatter.Deserialize(String inputString) +220 System.Web.UI.ObjectStateFormatter.System.Web.UI.IStateFormatter.Deserialize(String serializedState) +5 System.Web.UI.Util.DeserializeWithAssert(IStateFormatter formatter, String serializedState) +37 System.Web.UI.HiddenFieldPageStatePersister.Load() +202 System.Web.UI.Page.LoadPageStateFromPersistenceMedium() +106 System.Web.UI.Page.LoadAllState() +43 System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +3905 System.Web.UI.Page.ProcessRequest(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +262 System.Web.UI.Page.ProcessRequest() +79 System.Web.UI.Page.ProcessRequestWithNoAssert(HttpContext context) +21 System.Web.UI.Page.ProcessRequest(HttpContext context) +109 ASP.frm_items2_aspx.ProcessRequest(HttpContext context) in c:\Windows\Microsoft.NET\Framework\v2.0.50727\Temporary ASP.NET Files\root\a961040e\19f53d4c\App_Web_frm_items2.aspx.cdcab7d2.nkfrbsfi.0.cs:0 System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +399 System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +76 I use this Tool to fix this problem but in vain !! I don't know even the root cause of this problem !!

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• Overriding equals method without breaking symmetry in a class that has a primary key

  - by Kosta

  Hi, the answer to this question is probably "not possible", but let me ask regardless :) Assuming we have a very simple JAVA class that has a primary key, for example: class Person { String ssid; String name; String address; ... } Now, I want to store people in a collection, meaning I will have to override the equals method. Not a completely trivial matter, but on a bare basis I will have something along the lines of: @Override public boolean equals (Object other) { if(other==this) return true; if(!other.getClass().equals(this.getClass()) return false; Person otherPerson = (Person)other; if(this.ssid.equals(otherPerson.getSsid()) return true; } Excuse any obvious blunders, just typing this out of my head. Now, let's say later on in the application I have a ssid I obtained through user input. If I want to compare my ssid to a Person, I would have to call something like: String mySsid = getFromSomewhere(); Person myPerson = getFromSomewhere(); if(myPerson.equals(new Person(mySsid)) doSomething(); This means I have to create a convenience constructor to create a Person based on ssid (if I don't already have one), and it's also quite verbose. It would be much nicer to simply call myPerson.equals(mySsid) but if I added a string comparison to my Person equals class, that would break the symmetry property, since the String hasn't got a clue on how to compare itself to a Person. So finally, the big question, is there any way to enable this sort of "shorthand" comparisons using the overriden equals method, and without breaking the symmetry rule? Thanks for any thoughts on this!

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• How to make a custom NSFormatter work correctly on Snow Leopard?

  - by Nathan

  I have a custom NSFormatter attached to several NSTextFields who's only purpose is to uppercase the characters as they are typed into field. The entire code for my formatter is included below. The stringForObjectValue() and getObjectValue() implementations are no-ops and taken pretty much directly out of Apple's documentation. I'm using the isPartialStringValid() method to return an uppercase version of the string. This code works correctly in 10.4 and 10.5. When I run it on 10.6, I get "strange" behaviour where text fields aren't always render the characters that are typed and sometimes are just displaying garbage. I've tried enabling NSZombie detection and running under Instruments but nothing was reported. I see errors like the following in "Console": HIToolbox: ignoring exception '*** -[NSCFString replaceCharactersInRange:withString:]: Range or index out of bounds' that raised inside Carbon event dispatch ( 0 CoreFoundation 0x917ca58a __raiseError + 410 1 libobjc.A.dylib 0x94581f49 objc_exception_throw + 56 2 CoreFoundation 0x917ca2b8 +[NSException raise:format:arguments:] + 136 3 CoreFoundation 0x917ca22a +[NSException raise:format:] + 58 4 Foundation 0x9140f528 mutateError + 218 5 AppKit 0x9563803a -[NSCell textView:shouldChangeTextInRange:replacementString:] + 852 6 AppKit 0x95636cf1 -[NSTextView(NSSharing) shouldChangeTextInRanges:replacementStrings:] + 1276 7 AppKit 0x95635704 -[NSTextView insertText:replacementRange:] + 667 8 AppKit 0x956333bb -[NSTextInputContext handleTSMEvent:] + 2657 9 AppKit 0x95632949 _NSTSMEventHandler + 209 10 HIToolbox 0x93379129 _ZL23DispatchEventToHandlersP14EventTargetRecP14OpaqueEventRefP14HandlerCallRec + 1567 11 HIToolbox 0x933783f0 _ZL30SendEventToEventTargetInternalP14OpaqueEventRefP20OpaqueEventTargetRefP14HandlerCallRec + 411 12 HIToolbox 0x9339aa81 SendEventToEventTarget + 52 13 HIToolbox 0x933fc952 SendTSMEvent + 82 14 HIToolbox 0x933fc2cf SendUnicodeTextAEToUnicodeDoc + 700 15 HIToolbox 0x933fbed9 TSMKeyEvent + 998 16 HIToolbox 0x933ecede TSMProcessRawKeyEvent + 2515 17 AppKit 0x95632228 -[NSTextInputContext handleEvent:] + 1453 18 AppKit 0x9562e088 -[NSView interpretKeyEvents:] + 209 19 AppKit 0x95631b45 -[NSTextView keyDown:] + 751 20 AppKit 0x95563194 -[NSWindow sendEvent:] + 5757 21 AppKit 0x9547bceb -[NSApplication sendEvent:] + 6431 22 AppKit 0x9540f6fb -[NSApplication run] + 917 23 AppKit 0x95407735 NSApplicationMain + 574 24 macsetup 0x00001f9f main + 24 25 macsetup 0x00001b75 start + 53 ) Can anybody shed some light on what is happening? Am I just using NSFormatter incorrectly? -(NSString*) stringForObjectValue:(id)object { if( ![object isKindOfClass: [ NSString class ] ] ) { return nil; } return [ NSString stringWithString: object ]; } -(BOOL)getObjectValue: (id*)object forString: string errorDescription:(NSString**)error { if( object ) { *object = [ NSString stringWithString: string ]; return YES; } return NO; } -(BOOL) isPartialStringValid: (NSString*) cStr newEditingString: (NSString**) nStr errorDescription: (NSString**) error { *nStr = [NSString stringWithString: [cStr uppercaseString]]; return NO; }

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• How would I go about sharing variables in a class with Lua?

  - by Nicholas Flynt

  I'm fairly new to Lua, I've been working on trying to implement Lua scripting for logic in a Game Engine I'm putting together. I've had no trouble so far getting Lua up and running through the engine, and I'm able to call Lua functions from C and C functions from Lua. The way the engine works now, each Object class contains a set of variables that the engine can quickly iterate over to draw or process for physics. While game objects all need to access and manipulate these variables in order for the Game Engine itself to see any changes, they are free to create their own variables, a Lua is exceedingly flexible about this so I don't forsee any issues. Anyway, currently the Game Engine side of things are sitting in C land, and I really want them to stay there for performance reasons. So in an ideal world, when spawning a new game object, I'd need to be able to give Lua read/write access to this standard set of variables as part of the Lua object's base class, which its game logic could then proceed to run wild with. So far, I'm keeping two separate tables of objects in place-- Lua spawns a new game object which adds itself to a numerically indexed global table of objects, and then proceeds to call a C++ function, which creates a new GameObject class and registers the Lua index (an int) with the class. So far so good, C++ functions can now see the Lua object and easily perform operations or call functions in Lua land using dostring. What I need to do now is take the C++ variables, part of the GameObject class, and expose them to Lua, and this is where google is failing me. I've encountered a very nice method here which details the process using tags, but I've read that this method is deprecated in favor of metatables. What is the ideal way to accomplish this? Is it worth the hassle of learning how to pass class definitions around using libBind or some equivalent method, or is there a simple way I can just register each variable (once, at spawn time) with the global lua object? What's the "current" best way to do this, as of Lua 5.1.4?

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• Why does 12:20 PM parse to 0:20 on the next day?

  - by Hanno Fietz

  I'm using java.text.SimpleDateFormat to parse string representations of date/time values inside an XML document. I'm seeing all times that have an hour value of 12 shifted by 12 hours into the future, i. e. 20 minutes past noon gets parsed to mean 20 minutes past midnight the following day. I wrote a unit test which seems to confirm that the error is made upon parsing (I checked the return values from getTime() with the linux shell command date). Now I'm wondering: is there a bug in the parse() method? is there something wrong with the input string? am I using the wrong format string for the input? The input data is taken from Yahoo's YWeather service. Here's the test and its output: public class YWeatherReaderTest { public static final String[] rgDateSamples = { "Thu, 08 Apr 2010 12:20 PM CEST", "Thu, 08 Apr 2010 12:20 AM CEST" }; public void dateParsing() throws ParseException { DateFormat formatter = new SimpleDateFormat("EEE, dd MMM yyyy K:m a z", Locale.US); for (String dtsSrc : YWeatherReaderTest.rgDateSamples) { Date dt = formatter.parse(dtsSrc); String dtsDst = formatter.format(dt); System.out.println(dtsSrc); System.out.println(dtsDst); System.out.println(); } } } Thu, 08 Apr 2010 12:20 PM CEST Fri, 09 Apr 2010 0:20 AM CEST Thu, 08 Apr 2010 12:20 AM CEST Thu, 08 Apr 2010 0:20 PM CEST The second output line of the second iteration is slightly weird, because 00:20 isn't PM. The milliseconds value of the Date object, however, corresponds to the (wrong) time of 20 minutes past noon.

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• Why would a WebService return nulls when the actual service returns data?

  - by Jerry

  I have a webservice (out of my control) that I have to talk to. I also have a packet-sniffer on the line, and (SURPRISE!!!) the developers of the webservice aren't lying. They are actually sending back all of the data that I requested. But the web-service code that is auto-generated from the WSDL file is giving me "null" as a value. I used their WSDL file to generate my Web Reference. I checked my data types with the datatypes that the WSDL file has declared. And I used the code as listed below to perform the calls: DT_MaterialMaster_LookupRequest req = new DT_MaterialMaster_LookupRequest(); req.MaterialNumber = "101*"; req.DocumentNo = ""; req.Description = "Pipe*"; req.Plant = "0000"; MI_MaterialMaster_Lookup_OBService srv = new MI_MaterialMaster_Lookup_OBService(); DT_MaterialMaster_Response resp = srv.MI_MaterialMaster_Lookup_OB(new DT_MaterialMaster_LookupRequest[] { req }); // Note that the response here is ALWAYS null!! Console.WriteLine(resp.Status); The resp object is an actual object. It was generated properly. However, the Status and MaterialData fields are always null. When I call the web service, I've placed a packet-sniffer on the line, and I can see that I've sent the following (linebreaks and indentions for my own sanity): <?xml version="1.0" encoding="utf-8"?> <soap:Envelope xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema"> <soap:Body> <MT_MaterialMaster_Lookup xmlns="http://MyCompany.com/SomeCompany/mm/MaterialMasterSearch"> <Request xmlns=""> <MaterialNumber>101*</MaterialNumber> <Description>Pipe*</Description> <DocumentNo /> <Plant>0000</Plant> </Request> </MT_MaterialMaster_Lookup> </soap:Body> </soap:Envelope> The response that they send back SEEMS to be a valid response (linebreaks and indentions for my own sanity): <SOAP:Envelope xmlns:SOAP='http://schemas.xmlsoap.org/soap/envelope/'> <SOAP:Header /> <SOAP:Body> <n0:MT_MaterialMaster_Response xmlns:n0='http://MyCompany.com/SomeCompany/mm/MaterialMasterSearch' xmlns:prx='urn:SomeCompany.com:proxy:BRD:/1SAI/TAS4FE14A2DE960D61219AE:701:2009/02/10'> <Response> <Status>No Rows Found</Status> <MaterialData /> </Response> </n0:MT_MaterialMaster_Response> </SOAP:Body> </SOAP:Envelope> The status shows that it actually received data... but the resp.Status and resp.MaterialData fields are always null. What have I done wrong? UPDATE: The WSDL file is defined as: <?xml version="1.0" encoding="utf-8"?> <wsdl:definitions xmlns:p1="http://MyCompany.com/SomeCompany/mm/MaterialMasterSearch" name="MI_MaterialMaster_Lookup_AutoCAD_OB" targetNamespace="http://MyCompany.com/SomeCompany/mm/MaterialMasterSearch" xmlns:wsdl="http://schemas.xmlsoap.org/wsdl/"> <wsdl:types> <xsd:schema xmlns="http://MyCompany.com/SomeCompany/mm/MaterialMasterSearch" targetNamespace="http://MyCompany.com/SomeCompany/mm/MaterialMasterSearch" xmlns:xsd="http://www.w3.org/2001/XMLSchema"> <xsd:element name="MT_MaterialMaster_Response" type="p1:DT_MaterialMaster_Response" /> <xsd:element name="MT_MaterialMaster_Lookup" type="p1:DT_MaterialMaster_Lookup" /> <xsd:complexType name="DT_MaterialMaster_Response"> <xsd:sequence> <xsd:element name="Status" type="xsd:string"> <xsd:annotation> <xsd:appinfo source="http://SomeCompany.com/xi/TextID">d48d03b040af11df99e300145eccb24e</xsd:appinfo> </xsd:annotation> </xsd:element> <xsd:element maxOccurs="unbounded" name="MaterialData"> <xsd:annotation> <xsd:appinfo source="http://SomeCompany.com/xi/TextID">64908aa040a511df843700145eccb24e</xsd:appinfo> </xsd:annotation> <xsd:complexType> <xsd:sequence> <xsd:element name="MaterialNumber" type="xsd:string"> <xsd:annotation> <xsd:appinfo source="http://SomeCompany.com/xi/TextID">64908aa140a511df848500145eccb24e</xsd:appinfo> </xsd:annotation> </xsd:element> <xsd:element minOccurs="0" name="Description" type="xsd:string"> <xsd:annotation> <xsd:appinfo source="http://SomeCompany.com/xi/TextID">64908aa240a511df95bf00145eccb24e</xsd:appinfo> </xsd:annotation> </xsd:element> <xsd:element minOccurs="0" name="DocumentNo" type="xsd:string"> <xsd:annotation> <xsd:appinfo source="http://SomeCompany.com/xi/TextID">64908aa340a511dfb23700145eccb24e</xsd:appinfo> </xsd:annotation> </xsd:element> <xsd:element minOccurs="0" name="UOM" type="xsd:string"> <xsd:annotation> <xsd:appinfo source="http://SomeCompany.com/xi/TextID">3b5f14c040a611df9fbe00145eccb24e</xsd:appinfo> </xsd:annotation> </xsd:element> <xsd:element minOccurs="0" name="Hierarchy" type="xsd:string"> <xsd:annotation> <xsd:appinfo source="http://SomeCompany.com/xi/TextID">64908aa440a511dfc65b00145eccb24e</xsd:appinfo> </xsd:annotation> </xsd:element> <xsd:element minOccurs="0" name="Plant" type="xsd:string"> <xsd:annotation> <xsd:appinfo source="http://SomeCompany.com/xi/TextID">d48d03b140af11dfb78e00145eccb24e</xsd:appinfo> </xsd:annotation> </xsd:element> <xsd:element minOccurs="0" name="Procurement" type="xsd:string"> <xsd:annotation> <xsd:appinfo source="http://SomeCompany.com/xi/TextID">d48d03b240af11dfb87b00145eccb24e</xsd:appinfo> </xsd:annotation> </xsd:element> </xsd:sequence> </xsd:complexType> </xsd:element> </xsd:sequence> </xsd:complexType> <xsd:complexType name="DT_MaterialMaster_Lookup"> <xsd:sequence> <xsd:element maxOccurs="unbounded" name="Request"> <xsd:annotation> <xsd:appinfo source="http://SomeCompany.com/xi/TextID">64908aa040a511df843700145eccb24e</xsd:appinfo> </xsd:annotation> <xsd:complexType> <xsd:sequence> <xsd:element minOccurs="0" name="MaterialNumber" type="xsd:string"> <xsd:annotation> <xsd:appinfo source="http://SomeCompany.com/xi/TextID">64908aa140a511df848500145eccb24e</xsd:appinfo> </xsd:annotation> </xsd:element> <xsd:element minOccurs="0" name="Description" type="xsd:string"> <xsd:annotation> <xsd:appinfo source="http://SomeCompany.com/xi/TextID">64908aa240a511df95bf00145eccb24e</xsd:appinfo> </xsd:annotation> </xsd:element> <xsd:element minOccurs="0" name="DocumentNo" type="xsd:string"> <xsd:annotation> <xsd:appinfo source="http://SomeCompany.com/xi/TextID">64908aa340a511dfb23700145eccb24e</xsd:appinfo> </xsd:annotation> </xsd:element> <xsd:element minOccurs="0" name="Plant" type="xsd:string"> <xsd:annotation> <xsd:appinfo source="http://SomeCompany.com/xi/TextID">64908aa440a511dfc65b00145eccb24e</xsd:appinfo> </xsd:annotation> </xsd:element> </xsd:sequence> </xsd:complexType> </xsd:element> </xsd:sequence> </xsd:complexType> </xsd:schema> </wsdl:types> <wsdl:message name="MT_MaterialMaster_Lookup"> <wsdl:part name="MT_MaterialMaster_Lookup" element="p1:MT_MaterialMaster_Lookup" /> </wsdl:message> <wsdl:message name="MT_MaterialMaster_Response"> <wsdl:part name="MT_MaterialMaster_Response" element="p1:MT_MaterialMaster_Response" /> </wsdl:message> <wsdl:portType name="MI_MaterialMaster_Lookup_AutoCAD_OB"> <wsdl:operation name="MI_MaterialMaster_Lookup_AutoCAD_OB"> <wsdl:input message="p1:MT_MaterialMaster_Lookup" /> <wsdl:output message="p1:MT_MaterialMaster_Response" /> </wsdl:operation> </wsdl:portType> <wsdl:binding name="MI_MaterialMaster_Lookup_AutoCAD_OBBinding" type="p1:MI_MaterialMaster_Lookup_AutoCAD_OB"> <binding transport="http://schemas.xmlsoap.org/soap/http" xmlns="http://schemas.xmlsoap.org/wsdl/soap/" /> <wsdl:operation name="MI_MaterialMaster_Lookup_AutoCAD_OB"> <operation soapAction="http://SomeCompany.com/xi/WebService/soap1.1" xmlns="http://schemas.xmlsoap.org/wsdl/soap/" /> <wsdl:input> <body use="literal" xmlns="http://schemas.xmlsoap.org/wsdl/soap/" /> </wsdl:input> <wsdl:output> <body use="literal" xmlns="http://schemas.xmlsoap.org/wsdl/soap/" /> </wsdl:output> </wsdl:operation> </wsdl:binding> <wsdl:service name="MI_MaterialMaster_Lookup_AutoCAD_OBService"> <wsdl:port name="MI_MaterialMaster_Lookup_AutoCAD_OBPort" binding="p1:MI_MaterialMaster_Lookup_AutoCAD_OBBinding"> <address location="http://bxdwas.MyCompany.com/XISOAPAdapter/MessageServlet?channel=:AutoCAD:SOAP_SND_Material_Lookup" xmlns="http://schemas.xmlsoap.org/wsdl/soap/" /> </wsdl:port> </wsdl:service> </wsdl:definitions>

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• How do you localize/internationalize an MVC Controller when using a SQL based localization provider?

  - by EBarr

  Hopefully this isn't too silly of a question. In MVC there appears to be plenty of localization support in the views. Once I get to the controller, however, it becomes murky. Using meta:resourcekey="blah" is out, same with <%$ Resources:PageTitle.Text%. ASP.NET MVC - Localization Helpers -- suggested extensions for the Html helper classes like Resource(this Controller controller, string expression, params object[] args). Similarly, Localize your MVC with ease suggested a slightly different extension like Localize(this System.Web.UI.UserControl control, string resourceKey, params object[] args) None of these approaches works while in a controller. I put together the below function and I'm using the controllers full class name as my VirtualPath. But I'm new to MVC and assume there's a better way. public static string Localize (System.Type theType, string resourceKey, params object[] args) { string resource = (HttpContext.GetLocalResourceObject(theType.FullName, resourceKey) ?? string.Empty).ToString(); return mergeTokens(resource, args); } Thoughts? Comments?

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• Coldfusion Web Service Response Problem

  - by Ivan Paloscia

  I have a problem with the Web Service I recently developed. The problem is about the Web Service response. More precisely sometimes the Web Service sends back the following response: <soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"> <soapenv:Body> <ns1:GetConstants2Response soapenv:encodingStyle="http://schemas.xmlsoap.org/soap/encoding/" xmlns:ns1="http://usermanagerwstest"> <GetConstants2Return xsi:type="ns2:CFComponentSkeleton" xmlns:ns2="http://rpc.xml.coldfusion"/> </ns1:GetConstants2Response> </soapenv:Body> </soapenv:Envelope> Instead the correct response (that sometimes shows up in an intermittent way) is reported below: <soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"> <soapenv:Body> <ns1:GetConstants2Response soapenv:encodingStyle="http://schemas.xmlsoap.org/soap/encoding/" xmlns:ns1="http://usermanagerwstest"> <GetConstants2Return xsi:type="ns1:Constants2"> <BooleanTypeFalse xsi:type="xsd:string">0</BooleanTypeFalse> <BooleanTypeTrue xsi:type="xsd:string">1</BooleanTypeTrue> <GenderFemale xsi:type="xsd:string">F</GenderFemale> <GenderMale xsi:type="xsd:string">M</GenderMale> <LanguageEnglish xsi:type="xsd:string">inglese</LanguageEnglish> <LanguageItalian xsi:type="xsd:string">italiano</LanguageItalian> </GetConstants2Return> </ns1:GetConstants2Response> </soapenv:Body> </soapenv:Envelope> Where does the CFCComponentSkeleton comes from? I thank everybody in advance.

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• How to define index by several columns in hibernate entity?

  - by foobar

  Morning. I need to add indexing in hibernate entity. As I know it is possible to do using @Index annotation to specify index for separate column but I need an index for several fields of entity. I've googled and found jboss annotation @Table, that allows to do this (by specification). But (I don't know why) this functionality doesn't work. May be jboss version is lower than necessary, or maybe I don't understant how to use this annotation, but... complex index is not created. Why index may not be created? jboss version 4.2.3.GA Entity example: package somepackage; import org.hibernate.annotations.Index; import javax.persistence.Column; import javax.persistence.Entity; import javax.persistence.GeneratedValue; import javax.persistence.Id; @Entity @org.hibernate.annotations.Table(appliesTo = House.TABLE_NAME, indexes = { @Index(name = "IDX_XDN_DFN", columnNames = {House.XDN, House.DFN} ) } ) public class House { public final static String TABLE_NAME = "house"; public final static String XDN = "xdn"; public final static String DFN = "dfn"; @Id @GeneratedValue private long Id; @Column(name = XDN) private long xdn; @Column(name = DFN) private long dfn; @Column private String address; public long getId() { return Id; } public void setId(long id) { this.Id = id; } public long getXdn() { return xdn; } public void setXdn(long xdn) { this.xdn = xdn; } public long getDfn() { return dfn; } public void setDfn(long dfn) { this.dfn = dfn; } public String getAddress() { return address; } public void setAddress(String address) { this.address = address; } } When jboss/hibernate tries to create table "house" it throws following exception: Reason: org.hibernate.AnnotationException: @org.hibernate.annotations.Table references an unknown table: house

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• Merge Word Documents (Office Interop & .NET), Keeping Formatting

  - by mbmccormick

  I'm having some difficulty merging multiple word documents together using Microsoft Office Interop Assemblies (Office 2007) and ASP.NET 3.5. I'm able to merge the documents, but some of my formatting is missing (namely the fonts and images). My current merge code is shown below. private void CombineDocuments() { object wdPageBreak = 7; object wdStory = 6; object oMissing = System.Reflection.Missing.Value; object oFalse = false; object oTrue = true; string fileDirectory = @"C:\documents\"; Microsoft.Office.Interop.Word.Application WordApp = new Microsoft.Office.Interop.Word.Application(); Microsoft.Office.Interop.Word.Document wDoc = WordApp.Documents.Add(ref oMissing, ref oMissing, ref oMissing, ref oMissing); string[] wordFiles = Directory.GetFiles(fileDirectory, "*.doc"); for (int i = 0; i < wordFiles.Length; i++) { string file = wordFiles[i]; wDoc.Application.Selection.Range.InsertFile(file, ref oMissing, ref oMissing, ref oMissing, ref oFalse); wDoc.Application.Selection.Range.InsertBreak(ref wdPageBreak); wDoc.Application.Selection.EndKey(ref wdStory, ref oMissing); } string combineDocName = Path.Combine(fileDirectory, "Merged Document.doc"); if (File.Exists(combineDocName)) File.Delete(combineDocName); object combineDocNameObj = combineDocName; wDoc.SaveAs(ref combineDocNameObj, ref m_WordDocumentType, ref oMissing, ref oMissing, ref oMissing, ref oMissing, ref oMissing, ref oMissing, ref oMissing, ref oMissing, ref oMissing, ref oMissing, ref oMissing, ref oMissing, ref oMissing, ref oMissing); } I don't care necessarily how this is accomplished. It could output via PDF if it had to. I just want the formatting to carry over. Any help or hints that you could provide me with would be appreciated! Thanks!

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• Can't read from RSOP_RegistryPolicySetting WMI class in root\RSOP namespace

  - by JCCyC

  The class is documented in http://msdn.microsoft.com/en-us/library/aa375050%28VS.85%29.aspx And from this page it seems it's not an abstract class: http://msdn.microsoft.com/en-us/library/aa375084%28VS.85%29.aspx But whenever I run the code below I get an "Invalid Class" exception in ManagementObjectSearcher.Get(). So, does this class exist or not? ManagementScope scope; ConnectionOptions options = new ConnectionOptions(); options.Username = tbUsername.Text; options.Password = tbPassword.Password; options.Authority = String.Format("ntlmdomain:{0}", tbDomain.Text); scope = new ManagementScope(String.Format("\\\\{0}\\root\\RSOP", tbHost.Text), options); scope.Connect(); ManagementObjectSearcher searcher = new ManagementObjectSearcher(scope, new ObjectQuery("SELECT * FROM RSOP_RegistryPolicySetting")); foreach (ManagementObject queryObj in searcher.Get()) { wmiResults.Text += String.Format("id={0}\n", queryObj["id"]); wmiResults.Text += String.Format("precedence={0}\n", queryObj["precedence"]); wmiResults.Text += String.Format("registryKey={0}\n", queryObj["registryKey"]); wmiResults.Text += String.Format("valueType={0}\n", queryObj["valueType"]); } In the first link above, it lists as a requirement something called a "MOF": "Rsopcls.mof". Is this something I should have but have not? How do I obtain it? Is it necessary in the querying machine or the queried machine? Or both? I do have two copies of this file: C:\Windows>dir rsop*.mof /s Volume in drive C has no label. Volume Serial Number is 245C-A6EF Directory of C:\Windows\System32\wbem 02/11/2006 05:22 100.388 rsop.mof 1 File(s) 100.388 bytes Directory of C:\Windows\winsxs\x86_microsoft-windows-grouppolicy-base-mof_31bf3856ad364e35_6.0.6001.18000_none_f2c4356a12313758 19/01/2008 07:03 100.388 rsop.mof 1 File(s) 100.388 bytes Total Files Listed: 2 File(s) 200.776 bytes 0 Dir(s) 6.625.456.128 bytes free

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• PHP OOP: Providing Domain Entities with "Identity"

  - by sunwukung

  Bit of an abstract problem here. I'm experimenting with the Domain Model pattern, and barring my other tussles with dependencies - I need some advice on generating Identity for use in an Identity Map. In most examples for the Data Mapper pattern I've seen (including the one outlined in this book: http://apress.com/book/view/9781590599099) - the user appears to manually set the identity for a given Domain Object using a setter: $UserMapper = new UserMapper; //returns a fully formed user object from record sets $User = $UserMapper->find(1); //returns an empty object with appropriate properties for completion $UserBlank = $UserMapper->get(); $UserBlank->setId(); $UserBlank->setOtherProperties(); Now, I don't know if I'm reading the examples wrong - but in the first $User object, the $id property is retrieved from the data store (I'm assuming $id represents a row id). In the latter case, however, how can you set the $id for an object if it has not yet acquired one from the data store? The problem is generating a valid "identity" for the object so that it can be maintained via an Identity Map - so generating an arbitrary integer doesn't solve it. My current thinking is to nominate different fields for identity (i.e. email) and demanding their presence in generating blank Domain Objects. Alternatively, demanding all objects be fully formed, and using all properties as their identity...hardly efficient. (Or alternatively, dump the Domain Model concept and return to DBAL/DAO/Transaction Scripts...which is seeming increasingly elegant compared to the ORM implementations I've seen...)

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• Passing arguments to objects created using the new operator?

  - by Abhijit

  Hi guys, I have a small C++ problem to which I don't know the best solution. I have two classes A and B as follows: class A { int n; B* b; public: A(int num): n(num) { b = new B[n]; for (int i = 0; i < n; i++) { b[i].setRef(this); } } ~A() { delete [] b; } }; class B { A* a; public: B() { } B(A* aref) { a = aref; } void setRef(A* aref) { a = aref; } }; I am creating an object of class A by passing to its constructor the number of objects of class B I want to be created. I want every object of class B to hold a pointer to the class A object that creates it. I think the best way to do this would be by passing the pointer to the class A object as a constructor argument to the class B object. However, since I'm using the new operator, the no-args constructor for class B is called. As a result, the only solution I can see here is calling the setRef(A*) method for every object of class B after it has been constructed using the new operator. Is there a better solution/design pattern that would be more applicable here? Would using placement new for class B be a better solution? Thanks in advance for your help.

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• OutOfMemory during paging

  - by Tony

  Hi I am using ObjectDataSource, ListView, CustomPaging If the total number of rows is too big, I got OutOfMemory exception, it seems that it caused by some array, I don't get it, because total number of rows should never make any array to be filled with elements, the page size do!! This is the logger. ****EXCEPTION # 3 : 4/30/2010 9:43:07 PM System.Web.HttpUnhandledException: Exception of type 'System.Web.HttpUnhandledException' was thrown. --- System.OutOfMemoryException: Exception of type 'System.OutOfMemoryException' was thrown. at System.Web.UI.WebControls.ListView.CreateChildControls() at System.Web.UI.Control.EnsureChildControls() at System.Web.UI.WebControls.ListView.get_Controls() at System.Web.UI.Control.LoadChildViewStateByIndex(ArrayList childState) at System.Web.UI.Control.LoadViewStateRecursive(Object savedState) at System.Web.UI.Control.LoadChildViewStateByIndex(ArrayList childState) at System.Web.UI.Control.LoadViewStateRecursive(Object savedState) at System.Web.UI.Control.LoadChildViewStateByIndex(ArrayList childState) at System.Web.UI.Control.LoadViewStateRecursive(Object savedState) at System.Web.UI.Control.LoadChildViewStateByIndex(ArrayList childState) at System.Web.UI.Control.LoadViewStateRecursive(Object savedState) at System.Web.UI.Control.LoadChildViewStateByIndex(ArrayList childState) at System.Web.UI.Control.LoadViewStateRecursive(Object savedState) at System.Web.UI.Control.LoadChildViewStateByIndex(ArrayList childState) at System.Web.UI.Control.LoadViewStateRecursive(Object savedState) at System.Web.UI.Page.LoadAllState() at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) --- End of inner exception stack trace --- at System.Web.UI.Page.HandleError(Exception e) at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) at System.Web.UI.Page.ProcessRequest(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) at System.Web.UI.Page.ProcessRequest() at System.Web.UI.Page.ProcessRequestWithNoAssert(HttpContext context) at System.Web.UI.Page.ProcessRequest(HttpContext context) at ASP.default_aspx.ProcessRequest(HttpContext context) in c:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\Temporary ASP.NET Files\flickrdemo\15752207\c63ea96c\App_Web__8yxn9sb.0.cs:line 0 at System.Web.HttpApplication.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)

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• Python performance improvement request for winkler

  - by Martlark

  I'm a python n00b and I'd like some suggestions on how to improve the algorithm to improve the performance of this method to compute the Jaro-Winkler distance of two names. def winklerCompareP(str1, str2): """Return approximate string comparator measure (between 0.0 and 1.0) USAGE: score = winkler(str1, str2) ARGUMENTS: str1 The first string str2 The second string DESCRIPTION: As described in 'An Application of the Fellegi-Sunter Model of Record Linkage to the 1990 U.S. Decennial Census' by William E. Winkler and Yves Thibaudeau. Based on the 'jaro' string comparator, but modifies it according to whether the first few characters are the same or not. """ # Quick check if the strings are the same - - - - - - - - - - - - - - - - - - # jaro_winkler_marker_char = chr(1) if (str1 == str2): return 1.0 len1 = len(str1) len2 = len(str2) halflen = max(len1,len2) / 2 - 1 ass1 = '' # Characters assigned in str1 ass2 = '' # Characters assigned in str2 #ass1 = '' #ass2 = '' workstr1 = str1 workstr2 = str2 common1 = 0 # Number of common characters common2 = 0 #print "'len1', str1[i], start, end, index, ass1, workstr2, common1" # Analyse the first string - - - - - - - - - - - - - - - - - - - - - - - - - # for i in range(len1): start = max(0,i-halflen) end = min(i+halflen+1,len2) index = workstr2.find(str1[i],start,end) #print 'len1', str1[i], start, end, index, ass1, workstr2, common1 if (index > -1): # Found common character common1 += 1 #ass1 += str1[i] ass1 = ass1 + str1[i] workstr2 = workstr2[:index]+jaro_winkler_marker_char+workstr2[index+1:] #print "str1 analyse result", ass1, common1 #print "str1 analyse result", ass1, common1 # Analyse the second string - - - - - - - - - - - - - - - - - - - - - - - - - # for i in range(len2): start = max(0,i-halflen) end = min(i+halflen+1,len1) index = workstr1.find(str2[i],start,end) #print 'len2', str2[i], start, end, index, ass1, workstr1, common2 if (index > -1): # Found common character common2 += 1 #ass2 += str2[i] ass2 = ass2 + str2[i] workstr1 = workstr1[:index]+jaro_winkler_marker_char+workstr1[index+1:] if (common1 != common2): print('Winkler: Wrong common values for strings "%s" and "%s"' % \ (str1, str2) + ', common1: %i, common2: %i' % (common1, common2) + \ ', common should be the same.') common1 = float(common1+common2) / 2.0 ##### This is just a fix ##### if (common1 == 0): return 0.0 # Compute number of transpositions - - - - - - - - - - - - - - - - - - - - - # transposition = 0 for i in range(len(ass1)): if (ass1[i] != ass2[i]): transposition += 1 transposition = transposition / 2.0 # Now compute how many characters are common at beginning - - - - - - - - - - # minlen = min(len1,len2) for same in range(minlen+1): if (str1[:same] != str2[:same]): break same -= 1 if (same > 4): same = 4 common1 = float(common1) w = 1./3.*(common1 / float(len1) + common1 / float(len2) + (common1-transposition) / common1) wn = w + same*0.1 * (1.0 - w) return wn

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