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• Object Reference is required for non static field, method, or property

  - by JB

  using System; using System.IO; using System.Data; using System.Text; using System.Drawing; using System.Data.OleDb; using System.Collections; using System.ComponentModel; using System.Windows.Forms; using System.Drawing.Printing; using System.Collections.Generic; namespace Eagle_Eye_Class_Finder { public class GetSchedule { public GetSchedule() { IDnumber[] IDnumbers = new IDnumber[3]; IDnumbers[0] = new IDnumber() { Name = "Joshua Banks", ID = "900456317", year = "Senior", class1 = "TEET 4090", class2 = "TEET 3020", class3 = "TEET 3090", class4 = "TEET 4290" }; IDnumbers[1] = new IDnumber() { Name = "Sean Ward", ID = "900456318", year = "Junior", class1 = "ENGNR 4090", class2 = "ENGNR 3020", class3 = "ENGNR 3090", class4 = "ENGNR 4290" }; IDnumbers[2] = new IDnumber() { Name = "Terrell Johnson", ID = "900456319", year = "Sophomore", class1 = "BUS 4090", class2 = "BUS 3020", class3 = "BUS 3090", class4 = "BUS 4290" }; } public class IDnumber { public string Name { get; set; } public string ID { get; set; } public string year { get; set; } public string class1 { get; set; } public string class2 { get; set; } public string class3 { get; set; } public string class4 { get; set; } public static void ProcessNumber(IDnumber myNum) { StringBuilder myData = new StringBuilder(); myData.AppendLine(IDnumber.Name); myData.AppendLine(": "); myData.AppendLine(IDnumber.ID); myData.AppendLine(IDnumber.year); myData.AppendLine(IDnumber.class1); myData.AppendLine(IDnumber.class2); myData.AppendLine(IDnumber.class3); myData.AppendLine(IDnumber.class4); MessageBox.Show(myData); } public string GetDataFromNumber(string ID) { foreach (IDnumber idCandidateMatch in IDnumbers) { if (IDCandidateMatch.ID == ID) { StringBuilder myData = new StringBuilder(); myData.AppendLine(IDnumber.Name); myData.AppendLine(": "); myData.AppendLine(IDnumber.ID); myData.AppendLine(IDnumber.year); myData.AppendLine(IDnumber.class1); myData.AppendLine(IDnumber.class2); myData.AppendLine(IDnumber.class3); myData.AppendLine(IDnumber.class4); return myData; } } return ""; } } } }using System; using System.IO; using System.Data; using System.Text; using System.Drawing; using System.Data.OleDb; using System.Collections; using System.ComponentModel; using System.Windows.Forms; using System.Drawing.Printing; using System.Collections.Generic; namespace Eagle_Eye_Class_Finder { public class GetSchedule { public GetSchedule() { IDnumber[] IDnumbers = new IDnumber[3]; IDnumbers[0] = new IDnumber() { Name = "Joshua Banks", ID = "900456317", year = "Senior", class1 = "TEET 4090", class2 = "TEET 3020", class3 = "TEET 3090", class4 = "TEET 4290" }; IDnumbers[1] = new IDnumber() { Name = "Sean Ward", ID = "900456318", year = "Junior", class1 = "ENGNR 4090", class2 = "ENGNR 3020", class3 = "ENGNR 3090", class4 = "ENGNR 4290" }; IDnumbers[2] = new IDnumber() { Name = "Terrell Johnson", ID = "900456319", year = "Sophomore", class1 = "BUS 4090", class2 = "BUS 3020", class3 = "BUS 3090", class4 = "BUS 4290" }; } public class IDnumber { public string Name { get; set; } public string ID { get; set; } public string year { get; set; } public string class1 { get; set; } public string class2 { get; set; } public string class3 { get; set; } public string class4 { get; set; } public static void ProcessNumber(IDnumber myNum) { StringBuilder myData = new StringBuilder(); myData.AppendLine(IDnumber.Name); myData.AppendLine(": "); myData.AppendLine(IDnumber.ID); myData.AppendLine(IDnumber.year); myData.AppendLine(IDnumber.class1);// i get it for all of these myData.AppendLine(IDnumber.class2); myData.AppendLine(IDnumber.class3); myData.AppendLine(IDnumber.class4); MessageBox.Show(myData); } public string GetDataFromNumber(string ID) { foreach (IDnumber idCandidateMatch in IDnumbers) { if (IDCandidateMatch.ID == ID) { StringBuilder myData = new StringBuilder(); myData.AppendLine(IDnumber.Name); myData.AppendLine(": "); myData.AppendLine(IDnumber.ID); myData.AppendLine(IDnumber.year); myData.AppendLine(IDnumber.class1); myData.AppendLine(IDnumber.class2); myData.AppendLine(IDnumber.class3); myData.AppendLine(IDnumber.class4); return myData; } } return ""; } } } }

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• Add a custom button to titlebar in Windows Mobile 5

  - by Vaccano

  Is there a way to add a button to the title bar in windows mobile 5? (Next to the X or OK button.) I have an app that locks the users out of the start button, so I need to create an alternate way of launching the help file. Failing the title bar, I will look for a way to customize what a hardware button does. I am using C#.

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• Factories, or Dependency Injection for object instantiation in WCF, when coding against an interface

  - by Saajid Ismail

  Hi I am writing a client/server application, where the client is a Windows Forms app, and the server is a WCF service hosted in a Windows Service. Note that I control both sides of the application. I am trying to implement the practice of coding against an interface: i.e. I have a Shared assembly which is referenced by the client application. This project contains my WCF ServiceContracts and interfaces which will be exposed to clients. I am trying to only expose interfaces to the clients, so that they are only dependant on a contract, not any specific implementation. One of the reasons for doing this is so that I can have my service implementation, and domain change at any time without having to recompile and redeploy the clients. The interfaces/contracts will in this case not change. I only need to recompile and redeploy my WCF service. The design issue I am facing now, is: on the client, how do I create new instances of objects, e.g. ICustomer, if the client doesn't know about the Customer concrete implementation? I need to create a new customer to be saved to the DB. Do I use dependency injection, or a Factory class to instantiate new objects, or should I just allow the client to create new instances of concrete implementations? I am not doing TDD, and I will typically only have one implementation of ICustomer or any other exposed interface.

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• Python's subprocess.Popen object hangs gathering child output when child process does not exit

  - by Daniel Miles

  When a process exits abnormally or not at all, I still want to be able to gather what output it may have generated up until that point. The obvious solution to this example code is to kill the child process with an os.kill, but in my real code, the child is hung waiting for NFS and does not respond to a SIGKILL. #!/usr/bin/python import subprocess import os import time import signal import sys child_script = """ #!/bin/bash i=0 while [ 1 ]; do echo "output line $i" i=$(expr $i \+ 1) sleep 1 done """ childFile = open("/tmp/childProc.sh", 'w') childFile.write(child_script) childFile.close() cmd = ["bash", "/tmp/childProc.sh"] finish = time.time() + 3 p = subprocess.Popen(cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE, stdin=subprocess.PIPE) while p.poll() is None: time.sleep(0.05) if finish < time.time(): print "timed out and killed child, collecting what output exists so far" out, err = p.communicate() print "got it" sys.exit(0) In this case, the print statement about timing out appears and the python script never exits or progresses. Does anybody know how I can do this differently and still get output from my child processe

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• Need help modifying my Custom Replace code based on string passed to it

  - by fraXis

  Hello, I have a C# program that will open a text file, parse it for certain criteria using a RegEx statement, and then write a new text file with the changed criteria. For example: I have a text file with a bunch of machine codes in it such as: X0.109Y0Z1.G0H2E1 My C# program will take this and turn it into: X0.109Y0G54G0T3 G43Z1.H2M08 (Note: the T3 value is really the H value (H2 in this case) + 1). T = H + 1 It works great, because the line usually always starts with X so the RegEx statement always matches. My RegEx that works with my first example is as follows: //Regex pattern for: //- X(value)Y(value)Z(value)G(value)H(value)E(value) //- X(value)Y(value)Z(value)G(value)H(value)E(value)M(value) //- X(value)Y(value)Z(value)G(value)H(value)E(value)A(value) //- X(value)Y(value)Z(value)G(value)H(value)E(value)M(value)A(value) //value can be positive or negative, integer or floating point number with multiple decimal places or without any private Regex regReal = new Regex("^(X([-]|[.]|[-.]|[0-9])[0-9]*[.]*[0-9]*){1}(Y([-]|[.]|[-.]|[0-9])[0-9]*[.]*[0-9]*){1}(Z([-]|[.]|[-.]|[0-9])[0-9]*[.]*[0-9]*){1}(G([-]|[.]|[-.]|[0-9])[0-9]*[.]*[0-9]*){1}(H([-]|[.]|[-.]|[0-9])[0-9]*[.]*[0-9]*){1}(E([-]|[.]|[-.]|[0-9])[0-9]*[.]*[0-9]*){1}(M([-]|[.]|[-.]|[0-9])[0-9]*[.]*[0-9]*)?(A([-]|[.]|[-.]|[0-9])[0-9]*[.]*[0-9]*)?$"); This RegEx works great because sometimes the line of code could also have an M or A at the end such as: X0.109Y0Z1.G0H2E1A2 My problem is now I have run into some lines of code that have this: G90G0X1.5Y-0.036E1Z3.H1 and I need to turn it into this: G90G0X1.5Y-0.036G54T2 G43Z3.H1M08 Can someone please modify my RegEx and code to turn this: G90G0X1.5Y-0.036E1Z3.H1 into: G90G0X1.5Y-0.036G54T2 G43Z3.H1M08 But sometimes the values could be a little different such as: G(value)G(value)X(value)Y(value)E(value)Z(value)H(value) G(value)G(value)X(value)Y(value)E(value)Z(value)H(value)A(value) G(value)G(value)X(value)Y(value)E(value)Z(value)H(value)A(value)(M)value G(value)G(value)X(value)Y(value)E(value)Z(value)H(value)M(value)(A)value But also (this is where Z is moved to a different spot) G(value)G(value)X(value)Y(value)Z(value)E(value)H(value) G(value)G(value)X(value)Y(value)Z(value)E(value)H(value)A(value) G(value)G(value)X(value)Y(value)Z(value)E(value)H(value)A(value)(M)value G(value)G(value)X(value)Y(value)Z(value)E(value)H(value)M(value)(A)value Here is my code that needs to be changed (I did not include the open and saving of the text file since that is pretty standard stuff). //Regex pattern for: //- X(value)Y(value)Z(value)G(value)H(value)E(value) //- X(value)Y(value)Z(value)G(value)H(value)E(value)M(value) //- X(value)Y(value)Z(value)G(value)H(value)E(value)A(value) //- X(value)Y(value)Z(value)G(value)H(value)E(value)M(value)A(value) //value can be pozitive or negative, integer or floating point number with multiple decimal places or without any private Regex regReal = new Regex("^(X([-]|[.]|[-.]|[0-9])[0-9]*[.]*[0-9]*){1}(Y([-]|[.]|[-.]|[0-9])[0-9]*[.]*[0-9]*){1}(Z([-]|[.]|[-.]|[0-9])[0-9]*[.]*[0-9]*){1}(G([-]|[.]|[-.]|[0-9])[0-9]*[.]*[0-9]*){1}(H([-]|[.]|[-.]|[0-9])[0-9]*[.]*[0-9]*){1}(E([-]|[.]|[-.]|[0-9])[0-9]*[.]*[0-9]*){1}(M([-]|[.]|[-.]|[0-9])[0-9]*[.]*[0-9]*)?(A([-]|[.]|[-.]|[0-9])[0-9]*[.]*[0-9]*)?$"); private string CheckAndModifyLine(string line) { if (regReal.IsMatch(line)) //Check the first Regex with line string { return CustomReplace(line); } else { return line; } } private string CustomReplace(string input) { string returnValue = String.Empty; int zPos = input.IndexOf("Z"); int gPos = input.IndexOf("G"); int hPos = input.IndexOf("H"); int ePos = input.IndexOf("E"); int aPos = input.IndexOf("A"); int hValue = Int32.Parse(input.Substring(hPos + 1, ePos - hPos - 1)) + 1; //get H number //remove A value returnValue = ((aPos == -1) ? input : input.Substring(0, aPos)); //replace Z value returnValue = Regex.Replace(returnValue, "Z[-]?\\d*\\.*\\d*", "G54"); //replace H value returnValue = Regex.Replace(returnValue, "H\\d*\\.*\\d*", "T" + hValue.ToString() + ((aPos == -1) ? String.Empty : input.Substring(aPos, input.Length - aPos))); //replace E, or E and M value returnValue = Regex.Replace(returnValue, "E\\d*\\.*\\d(M\\d*\\.*\\d)?", Environment.NewLine + "G43" + input.Substring(zPos, gPos - zPos) + input.Substring(hPos, ePos - hPos) + "M08"); return returnValue; } I tried to modify the above code to match the new line of text I am encountering (and split into two lines like my first example) but I am failing miserably. Thanks so much.

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• Main pricing and support for custom client pricing (Database Architecture ideas help - Rails)

  - by slythic

  Hi all, I have a personal project I'm planning and I came to a small hurdle. I want to have an item with price that will be the default for all clients/users. However, in my business I have some clients that are grandfathered in to some special pricing. In the case of these grandfathered in cases, I'll manually plug their special price in my admin section. Then all they will see is their special pricing while the regular users/clients see the default price. What is the best and simplest way to design the back-end for this? FYI - I'll be using rails as my framework. Many thanks! -Tony

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• C# UserControl Custom Properties

  - by kjward

  i am creating a usercontrol which provides all of the common validations for a range of textbox styles: alpha, number, decimal, SSN, etc. so, when a developer using this control selects the alpha style, they can also select another property which defines a string of special characters that could also be allowed during validation. but when the decimal style, for instance, is selected, i'd like to simply disable the special characters property so it is not settable when a style is selected that doesn't allow special characters. how can i achieve this goal? thanks

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• Fluent NHibernate - Cascade delete a child object when no explicit parent->child relationship exists

  - by John Price

  I've got an application that keeps track of (for the sake of an example) what drinks are available at a given restaurant. My domain model looks like: class Restaurant { public IEnumerable<RestaurantDrink> GetRestaurantDrinks() { ... } //other various properties } class RestaurantDrink { public Restaurant Restaurant { get; set; } public Drink { get; set; } public string DrinkVariety { get; set; } //"fountain drink", "bottled", etc. //other various properties } class Drink { public string Name { get; set; } public string Manufacturer { get; set; } //other various properties } My db schema is (I hope) about what you'd expect; "RestaurantDrinks" is essentially a mapping table between Restaurants and Drinks with some extra properties (like "DrinkVariety" tacked on). Using Fluent NHibernate to set up mappings, I've set up a "HasMany" relationship from Restaurants to RestaurantDrinks that causes the latter to be deleted when its parent Restaurant is deleted. My question is, given that "Drink" does not have any property on it that explicitly references RestaurantDrinks (the relationship only exists in the underlying database), can I set up a mapping that will cause RestaurantDrinks to be deleted if their associated Drink is deleted? Update: I've been trying to set up the mapping from the "RestaurantDrink" end of things using References(x => x.Drink) .Column("DrinkId") .Cascade.All(); But this doesn't seem to work (I still get an FK violation when deleting a Drink).

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• XML Deserialization of complex object

  - by nils_gate

  I have xml structure like this: <Group id="2" name="Third" parentid="0" /> <Group id="6" name="Five" parentid="4" /> <Group id="3" name="Four" parentid="2" /> <Group id="4" name="Six" parentid="1" /> parent is denotes Group's Id. The Constructor of Group reads like: public Group(string name, int ID, Group parent) While De-serializing, how do I get parent using Id and pass into group?

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• NSStatusItem with custom NSView and CALayer not drawing blue color when clicked

  - by Alexsander Akers

  I have an NSStatusItem with a subclassed NSView. The view's contents are drawn by its CALayer. Now, whenever the view is clicked, the mouseDown: method fires, but the NSStatusItem's background color doesn't change.

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• Custom Errors "Could no load type error"

  - by anil

  I am creating ASP.Net MVC application and want to handle errors globally. I have set web.config value as mode=On and defaulRedirect="Error.aspx". I have Error.aspx at two places. One at Views/Shared folder and one at project root folder level. But each time an unhandled error occurs, the error page at root level gets called. How can I make it redirect to the one at Shared folder level? I want to do this becasuse, currently I am getting error as "could not load type System.Web.Mvc.ViewPage" when any error is occuring. Regards, Anil

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• UITableViewCell Custom accessory - get the row of accessory

  - by Emil

  Hi. I have a pretty big issue. I am trying to create a favorite-button on every UITableViewCell in a UITableView. That works very good, and I currently have an action and selector performed when pressed. accessory = [UIButton buttonWithType:UIButtonTypeCustom]; [accessory setImage:[UIImage imageNamed:@"star.png"] forState:UIControlStateNormal]; accessory.frame = CGRectMake(0, 0, 15, 15); accessory.userInteractionEnabled = YES; [accessory addTarget:self action:@selector(didTapStar) forControlEvents:UIControlEventTouchUpInside]; cell.accessoryView = accessory; And selector: - (void) didTapStar { UITableViewCell *newCell = [tableView cellForRowAtIndexPath:???]; accessory = [UIButton buttonWithType:UIButtonTypeCustom]; [accessory setImage:[UIImage imageNamed:@"stared.png"] forState:UIControlStateNormal]; accessory.frame = CGRectMake(0, 0, 26, 26); accessory.userInteractionEnabled = YES; [accessory addTarget:self action:@selector(didTapStar) forControlEvents:UIControlEventTouchDown]; newCell.accessoryView = accessory; } Now, here's the problem: I want to know what row the accessory that was pressed belongs to. How can I do this? Thank you :)

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• NHibernate returning duplicate object in child collections when using Fetch

  - by UpTheCreek

  When doing a query like this (using Nhibernate 2.1.2): ICriteria criteria = session.CreateCriteria<MyRootType>() .SetFetchMode("ChildCollection1", FetchMode.Eager) .SetFetchMode("ChildCollection2", FetchMode.Eager) .Add(Restrictions.IdEq(id)); I am getting multiple duplicate objects in some cartesian fashion. E.g. if ChildCollection1 has 3 elements, and ChildColection2 has 2 elements then I get results with each element in ChildColection1 one duplicated, and each element in ChildColection2 triplicated! This was a bit of a WTF moment for me... So how to do this correctly? Is using SetFetchMode like this only supported when specifying one collection? Am I just using it wrong (I've seen some references to results transformers, but imagined this would be simplier). Is this something that's different in NH3? Update: As per Felice's suggestion, I tried using the DistinctRootEntity transformer, but this is still returning duplicates. Code: ICriteria criteria = session.CreateCriteria<MyRootType>() .SetFetchMode("ChildCollection1", FetchMode.Eager) .SetFetchMode("ChildCollection2", FetchMode.Eager) .Add(Restrictions.IdEq(id)); criteria.SetResultTransformer(Transformers.DistinctRootEntity); return criteria.UniqueResult<MyRootType>();

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• custom type face class by dinesh?

  - by dineshpeiris

  package typeface{ import flash.display.*; import flash.events.Event; import flash.filters.BitmapFilter; import flash.filters.BitmapFilterQuality; import flash.filters.BlurFilter; public class Main extends Sprite { private var typeSet:String="SEE > THINK > CREATE"; private var collectionSet:MovieClip; private var w:int = 1; public function Main():void { trace("start typeface application"); collectionSet = new MovieClip(); for (var n:int = 0; n < typeSet.length; n++) { var _x:int = 0 + (40 * n); var _y:int = 0; var Type:TypeCollector = new TypeCollector(_x, _y, stringToCharacter(typeSet, n), collectionSet); Type.addEventListener("action", actionHandler); } collectionSet.x = 100; collectionSet.y = (stage.stageHeight / 2) - 80; addChild(collectionSet); } private function actionHandler(event:Event):void { if (w == 16) { collectionSet.filters = [new BlurFilter(30, 30, BitmapFilterQuality.HIGH)]; removeChild(collectionSet); } w++; } public function stringToCharacter(str:String, n:int):String { if (str.length == 1) { return str; } return str.slice(n, n+1); } } } package typeface { import flash.display.*; import flash.events.Event; import flash.utils.Timer; import flash.events.TimerEvent; import flash.filters.BitmapFilter; import flash.filters.BitmapFilterQuality; import flash.filters.BlurFilter; import flash.events.EventDispatcher; public class TypeCollector extends EventDispatcher { private var TYPE_MC:typeMC; private var typeArray:Array = new Array("A", "B", "C", "D", "E", "F", "G", "H", "I", "J", "K", "L", "M", "N", "O", "P", "Q", "R", "S", "T", "U", "V", "W", "X", "Y", "Z", "1", "2", "3", "4", "5", "6", "7", "8", "9", "0", "<", ">"); private var character:String; private var num:int = 0; private var TypeTimer:Timer; private var _xNum:int; private var _yNum:int; private var movieClip:MovieClip; public function TypeCollector(_x:int, _y:int, char:String, movie:MovieClip) { var totalNum:int = typeArray.length; _xNum = _x; _yNum = _y; movieClip = movie; character = char; TypeTimer = new Timer(100, totalNum); TypeTimer.addEventListener("timer", TypeRoutTimer); TypeTimer.start(); } public function TypeRoutTimer(event:TimerEvent):void { CreateTypeFace(num, _xNum, _yNum, character); num++; } public function CreateTypeFace(num:int, _x:int, _y:int, character:String) { if (character == " ") { } else { if (TYPE_MC != null) { TYPE_MC.filters = [new BlurFilter(30, 30, BitmapFilterQuality.HIGH)]; movieClip.removeChild(TYPE_MC); } if (typeArray[num] == character) { TYPE_MC = new typeMC(); TYPE_MC.x = _x; TYPE_MC.y = _y; TYPE_MC.typeTF.text = typeArray[num]; TYPE_MC.filters = [new BlurFilter(5, 5, BitmapFilterQuality.HIGH)]; movieClip.addChild(TYPE_MC); dispatchEvent(new Event("action")); TypeTimer.stop(); } else { TYPE_MC = new typeMC(); TYPE_MC.x = _x; TYPE_MC.y = _y; TYPE_MC.typeTF.text = typeArray[num]; TYPE_MC.filters = [new BlurFilter(10, 10, BitmapFilterQuality.HIGH)]; movieClip.addChild(TYPE_MC); } } } } }

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• MSBuild appears to only use old output files for custom build tools

  - by sixlettervariables

  I have an ANTLR grammar file as part of a C# project file and followed the steps outlined in the User Manual. <Project ...> <PropertyGroup> <Antlr3ToolPath>$(ProjectDir)tools\antlr-3.1.3\lib</Antlr3ToolPath> <AntlrCleanupPath>$(ProjectDir)AntlrCleanup\$(OutputPath)</AntlrCleanupPath> </PropertyGroup> <ItemGroup> <Antlr3 Include="Grammar\Foo.g"> <OutputFiles>FooLexer.cs;FooParser.cs</OutputFiles> </Antlr3> <Antlr3 Include="Grammar\Bar.g"> <OutputFiles>BarLexer.cs;BarParser.cs</OutputFiles> </Antlr3> </ItemGroup> <Target Name="GenerateAntlrCode" Inputs="@(Antlr3)" Outputs="%(Antlr3.OutputFiles)"> <Exec Command="java -cp %22$(Antlr3ToolPath)\antlr-3.1.3.jar%22 org.antlr.Tool -message-format vs2005 @(Antlr3Input)" Outputs="%(Antlr3Input.OutputFiles)" /> <Exec Command="%22$(AntlrCleanupPath)\AntlrCleanup.exe%22 @(Antlr3Input) %(Antlr3Input.OutputFiles)" /> </Target> <ItemGroup> <!-- ...other files here... --> <Compile Include="Grammar\FooLexer.cs"> <AutoGen>True</AutoGen> <DesignTime>True</DesignTime> <DependentUpon>Foo.g</DependentUpon> </Compile> <Compile Include="Grammar\FooParser.cs"> <AutoGen>True</AutoGen> <DesignTime>True</DesignTime> <DependentUpon>Foo.g</DependentUpon> </Compile> <!-- ... --> </ItemGroup> </Project> For whatever reason, the Compile steps only use old versions of the code, no amount of tweaking appears to help.

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• Using a custom form in a modelformset factory?

  - by jamida

  I'd like to be able to use a customized form in a modelformset_factory. For example: models.py class Author(models.Model): name = models.CharField() address = models.CharField() class AuthorForm(ModelForm): class Meta: model = Author views.py def test_render(request): myModelFormset = modelformset_factory(Author) items = Author.objects.all() formsetInstance = myModelFormset(queryset = items) return render_to_response('template',locals()) The above code works just fine, but note I'm NOT using AuthorForm. The question is how can I get the modelformset_factory to use the AuthorForm (which I plan to customize later) instead of making a default Author form?

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• Check if any object in a 2d array is null

  - by Stefan Monov

  I've got an array var cells = new Cell[w, h], can I loop through all cells without a nested for-loop (I want to check if at least one is null)? Ideally I'd want to write something like Debug.Assert(!cells.Contains(null)).

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• NSFetchRequest returns correct number of objects, but each object contains nil attributes

  - by BU

  Hi, I can't figure out why this is happening. I can add to the context. But when I retrieve the objects, it returns the correct number of objects but the attributes of the objects are null. I am adding 3 instances with this code: +(BOOL)addStoreWithID:(NSNumber *)ID Latitude:(NSNumber *)latitude Longitude:(NSNumber *)longitude Name:(NSString *)name { Stores *store = (Stores *)[NSEntityDescription insertNewObjectForEntityForName:@"Stores" inManagedObjectContext:[[SharedResources instance] managedObjectContext]]; store.ID = ID; store.Latitude = latitude; store.Longitude = longitude; store.Name = name; NSError *error; if(![[[SharedResources instance] managedObjectContext] save:&error]) { //Handle the error return NO; } return YES; } I get the result: 2010-03-07 19:19:37.060 GamePouch_iPhone[11337:207] Store name is Starbucks (gdb) continue 2010-03-07 19:19:37.933 GamePouch_iPhone[11337:207] Store name is Dunkin Donuts (gdb) continue 2010-03-07 19:19:38.717 GamePouch_iPhone[11337:207] Store name is Krispy Kreme I have confirmed that this code is visited three times and none of the attributes are nil. Then when I try to retrieve it, I use the following code: +(NSMutableArray *)fetchAllObjects { NSFetchRequest *request; request = [[NSFetchRequest alloc] init]; NSEntityDescription *entity = [NSEntityDescription entityForName:@"Stores" inManagedObjectContext:[[SharedResources instance] managedObjectContext]]; [request setEntity:entity]; NSSortDescriptor *sortDescriptor = [[NSSortDescriptor alloc] initWithKey:@"ID" ascending:YES]; NSArray *sortDescriptors = [[NSArray alloc] initWithObjects:sortDescriptor, nil]; [request setSortDescriptors:sortDescriptors]; NSError *error; NSMutableArray *array = [[[SharedResources instance] managedObjectContext] executeFetchRequest:request error:&error]; [request release]; [sortDescriptor release]; [sortDescriptors release]; for(int i=0;i<3;i++) { Stores *tempStore = (Stores *)[array objectAtIndex:i]; NSLog(@"store name is %@",[tempStore Name]); } return array; } I get the result: 2010-03-07 19:21:00.504 GamePouch_iPhone[11337:207] store name is (null) (gdb) continue 2010-03-07 19:21:01.541 GamePouch_iPhone[11337:207] store name is (null) (gdb) continue 2010-03-07 19:21:02.503 GamePouch_iPhone[11337:207] store name is (null) Thanks a lot for reading. Any help would be much appreciated. Thanks Bakhtiyar uddin

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• Can JAXB Incrementally Marshall An Object?

  - by Intellectual Tortoise

  I've got a fairly simple, but potentially large structure to serialize. Basically the structure of the XML will be: <simple_wrapper> <main_object_type> <sub_objects> </main_object_type> ... main_object_type repeats up to 5,000 times </simple_wrapper> The main_object_type can have a significant amount of data. On my first 3,500 record extract, I had to give the JVM way more memory than it should need. So, I'd like to write out to disk after each (or a bunch of) main_object_type. I know that setting Marshaller.JAXB_FRAGMENT would allow it fragments, but I loose the outer xml document tags and the <simple_wrapper>. Any suggestions?

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• Flex: Create custom stroke on LineSeries?

  - by John Isaacks

  You can easily set a stroke on a line series like this: <mx:LineSeries yField="apple"> <mx:lineStroke> <mx:Stroke color="0x6699FF" weight="4" alpha=".8" /> </mx:lineStroke> </mx:LineSeries> This will set alpha for the entire stroke to .8 But I want to be able to set a different alpha on the stoke for each plot based on something in the dataProvider. For example the yField in the lineSeries is "Apple" which is how it knows where to plot for the lineSeries. I want to be able to add something like alphaField which tells it what to set the stroke alpha for each plot. so if my dataProvider was: <result month="Jan-04"> <apple>81768</apple> <alpha>1</alpha> </result> <result month="Feb-04"> <apple>51156</apple> <alpha>1</alpha> </result> <result month="Mar-04"> <apple>51156</apple> <alpha>.5</alpha> </result> And I set alphaField="alpha" then I would have a solid stroke from plot 0 to plot 1 and then a 50% alpha stroke from plot 1 to plot 2. How can I do this??? I am looking in the commitProperties() and updateDisplayList() methods of LineSeries and have no idea what would need to be added/changed to make this? I am pretty sure, this class has to use Graphics.lineTo() to draw each plot, so basically it would need to "get" the current alphaField value somehow, and apply a Graphics.lineStyle() with the correct alpha before drawing each line. Thanks!! UPDATE I have gotten much closer to my answer. When I extend LineRenderer I override updateDisplayList() which calls GraphicsUtilities.drawPolyLine() I extend GraphicsUtilities and override the method drawPolyLine() as this is where the line is actually drawn. I can call lineStyle() in here and change the alpha of the line... I still have 1 thing I cannot figure out, from within the drawPolyLine() method how can I access that data that dictates what the alpha should be? Thanks!!!!

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• Why isn’t my autoreleased object getting released?

  - by zoul

  Hello. I am debugging a weird memory management error and I can’t figure it out. I noticed that some of my objects are staying in memory longer than expected. I checked all my memory management and finally got to the very improbable conclusion that some of my autorelease operations don’t result in a release. Under what circumstances is that possible? I created a small testing Canary class that logs a message in dealloc and have the following testing code in place: NSLog(@"On the main thread: %i.", [NSThread isMainThread]); [[[Canary alloc] init] autorelease]; According to the code we’re really on the main thread, but the dealloc in Canary does not get called until much later. The delay is not deterministic and can easily take seconds or more. How is that possible? The application runs on a Mac, the garbage collection is turned off (Objective-C Garbage Collection is set to Unsupported on the target.) I am mostly used to iOS, is memory management on OS X different in some important way?

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• Trigger flash button object via javascript

  - by Beck

  Is it possible to trigger for example flash uploading button via javascript? For example I have made empty image wrappers and by clicking on them, they trigger flash button to open as select window. Thanks!

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• Custom broadcast events in AS3?

  - by Ender

  In Actionscript 3, most events use the capture/target/bubble model, which is pretty popular nowadays: When an event occurs, it moves through the three phases of the event flow: the capture phase, which flows from the top of the display list hierarchy to the node just before the target node; the target phase, which comprises the target node; and the bubbling phase, which flows from the node subsequent to the target node back up the display list hierarchy. However, some events, such as the Sprite class's enterFrame event, do not capture OR bubble - you must subscribe directly to the target to detect the event. The documentation refers to these as "broadcast events." I assume this is for performance reasons, since these events will be triggered constantly for each sprite on stage and you don't want to have to deal with all that superfluous event propagation. I want to dispatch my own broadcast events. I know you can prevent an event from bubbling (Event.bubbles = false), but can you get rid of capture as well?

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• IE attachEvent on object tag causes memory corruption

  - by larswa

  I've an ActiveX Control within an embedded IE8 HTML page that has the following event MessageReceived([in] BSTR srcWindowId, [in] BSTR json). On Windows the event is registered with OCX.attachEvent("MessageReceived", onMessageReceivedFunc). Following code fires the event in the HTML page. HRESULT Fire_MessageReceived(BSTR id, BSTR json) { CComVariant varResult; T* pT = static_cast<T*>(this); int nConnectionIndex; CComVariant* pvars = new CComVariant[2]; int nConnections = m_vec.GetSize(); for (nConnectionIndex = 0; nConnectionIndex < nConnections; nConnectionIndex++) { pT->Lock(); CComPtr<IUnknown> sp = m_vec.GetAt(nConnectionIndex); pT->Unlock(); IDispatch* pDispatch = reinterpret_cast<IDispatch*>(sp.p); if (pDispatch != NULL) { VariantClear(&varResult); pvars[1] = id; pvars[0] = json; DISPPARAMS disp = { pvars, NULL, 2, 0 }; pDispatch->Invoke(0x1, IID_NULL, LOCALE_USER_DEFAULT, DISPATCH_METHOD, &disp, &varResult, NULL, NULL); } } delete[] pvars; // -> Memory Corruption here! return varResult.scode; } After I enabled gflags.exe with application verifier, the following strange behaviour occur: After Invoke() that is executing the JavaScript callback, the BSTR from pvars[1] is copied to pvars[0] for some unknown reason!? The delete[] of pvars causes a double free of the same string then which ends in a heap corruption. Does anybody has an idea whats going on here? Is this a IE bug or is there a trick within the OCX Implementation that I'm missing? If I use the tag like: <script for="OCX" event="MessageReceived(id, json)" language="JavaScript" type="text/javascript"> window.onMessageReceivedFunc(windowId, json); </script> ... the strange copy operation does not occur. The following code also seem to be ok due to the fact that the caller of Fire_MessageReceived() is responsible for freeing the BSTRs. HRESULT Fire_MessageReceived(BSTR srcWindowId, BSTR json) { CComVariant varResult; T* pT = static_cast<T*>(this); int nConnectionIndex; VARIANT pvars[2]; int nConnections = m_vec.GetSize(); for (nConnectionIndex = 0; nConnectionIndex < nConnections; nConnectionIndex++) { pT->Lock(); CComPtr<IUnknown> sp = m_vec.GetAt(nConnectionIndex); pT->Unlock(); IDispatch* pDispatch = reinterpret_cast<IDispatch*>(sp.p); if (pDispatch != NULL) { VariantClear(&varResult); pvars[1].vt = VT_BSTR; pvars[1].bstrVal = srcWindowId; pvars[0].vt = VT_BSTR; pvars[0].bstrVal = json; DISPPARAMS disp = { pvars, NULL, 2, 0 }; pDispatch->Invoke(0x1, IID_NULL, LOCALE_USER_DEFAULT, DISPATCH_METHOD, &disp, &varResult, NULL, NULL); } } delete[] pvars; return varResult.scode; } Thanks!

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• Enumerate registered namespaces of a PHP DOMDocument object

  - by zneak

  Hello world, For one of my projects, I'm using the DOMDocument class to load and manipulate XML documents. I'd need to retrieve every namespace used in the document; however, I can't find how I'd do that. The DOMDocument class has methods to get the namespace prefix of an URI or the URI of a namespace prefix, but I've seen nothing to actually enumerate registered namespaces. The SimpleXML library has a getNamespaces() method for that. Is there an equivalent for DOMDocument?

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