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• How powerbuilder's datawindow executes insert command

  - by Archangel

  I am new to powerbuilder and having a lot of trouble using datawindows. I can't get my head around the insert mechanism of it. Can someone explain it to me, or at least point me in the right direction(article, tips etc...) ?

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• Did you feel learning to program with turtle graphics was useful?

  - by minty

  I'm preparing to teach someone to program. When I learned the course material used turtle graphics for the first few exercises. In reading introductory textbooks I have not found one that uses the technique. Did others find this approach helpful. If not what is a better way to learn to program?

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• GCD function in matlab

  - by SalemFayad

  hi, i am looking for a way to implement the "gcd" function used in matlab in another language but i really cant understand the way it functions. it says in http://www.mathworks.com/access/helpdesk/help/techdoc/ref/gcd.html that: "[G,C,D] = gcd(A,B) returns both the greatest common divisor array G, and the arrays C and D, which satisfy the equation: A(i).*C(i) + B(i).*D(i) = G(i)." but it says nothing about how it calculates C and D. i would be grateful if someone has a clearer idea about this subject! thanks:)

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• AS3 Memory Leak Example

  - by Skawful

  Can someone post an example of as3 code (specifically event listener included) that would be a simple example of something that could leak memory... also hopefully could you post a solution to the problem shown? The question is: What is a simple example of leaking memory in an AS3 event listener and how can you solve it?

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• Linked List Design

  - by Jim Scott

  The other day in a local .NET group I attend the following question came up: "Is it a valid interview question to ask about Linked Lists when hiring someone for a .NET development position?" Not having a computer sciense degree and being a self taught developer my response was that I did not feel it was appropriate as I in 5 years of developer with .NET had never been exposed to linked lists and did not hear any compeling reason for a use for one. However the person commented that it is a very common interview question so I decided when I left that I would do some reasearch on linked lists and see what I might be missing. I have read a number of posts on stack overflow and various google searches and decided the best way to learn about them was to write my own .NET classes to see how they worked from the inside out. Here is my class structure Single Linked List Constructor public SingleLinkedList(object value) Public Properties public bool IsTail public bool IsHead public object Value public int Index public int Count private fields not exposed to a property private SingleNode firstNode; private SingleNode lastNode; private SingleNode currentNode; Methods public void MoveToFirst() public void MoveToLast() public void Next() public void MoveTo(int index) public void Add(object value) public void InsertAt(int index, object value) public void Remove(object value) public void RemoveAt(int index) Questions I have: What are typical methods you would expect in a linked list? What is typical behaviour when adding new records? For example if I have 4 nodes and I am currently positioned in the second node and perform Add() should it be added after or before the current node? Or should it be added to the end of the list? Some of the designs I have seen explaining things seem to expose outside of the LinkedList class the Node object. In my design you simply add, get, remove values and know nothing about any node object. Should the Head and Tail be placeholder objects that are only used to define the head/tail of the list? I require my Linked List be instantiated with a value which creates the first node of the list which is essentially the head and tail of the list. Would you change that ? What should the rules be when it comes to removing nodes. Should someone be able to remove all nodes? Here is my Double Linked List Constructor public DoubleLinkedList(object value) Properties public bool IsHead public bool IsTail public object Value public int Index public int Count Private fields not exposed via property private DoubleNode currentNode; Methods public void AddFirst(object value) public void AddLast(object value) public void AddBefore(object existingValue, object value) public void AddAfter(object existingValue, object value) public void Add(int index, object value) public void Add(object value) public void Remove(int index) public void Next() public void Previous() public void MoveTo(int index)

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• Framework for iPhone wait screens

  - by 4thSpace

  I ran across a small framework some time back that someone put together for iPhone wait screens. But now I can't find any trace of it. Does anyone have a link to it? It may not be a framework as much as a few code snippets. But the guy had it all pre-made. You just needed to implement and specify the type of wait screen you wanted.

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• Count number of arguments to Excel formula in VBA

  - by Abiel

  I need to use VBA to determine the number of arguments passed to an Excel formula. For instance, suppose a cell contains the formula =MyFunc($A$1, "xyz", SUM(1,2,COUNT(C1:C12)), IF(B12,1,0)). Then the counter function should return 4. Does VBA contain any built-in functions for this, or does someone have an example of a regular expression that could calculate this?

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• Code implementation of advise method in windows Wdk

  - by akshvedh-singh

  Can someone please post Some code to depict the implementation of advise method which is described in IDotAdHocManager interface windows WDK as i am working on it and need to know its proper implementation.

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• What is the difference between JSON and Object Literal Notation?

  - by burak ozdogan

  Hi, Can someone tell me what is the main difference between a Javascript object defined by using "Object Literal Notation" and JSON object? According to a Javascript book it says this is an object defined by using Object Notation: var newObject = { prop1 : true, showMessage : function (msg) {alert(msg)} }; Why it is not a JSON object in this case? Just because it is not defined by using quotation marks? Thanks,

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• Sending form in libcurl

  - by sfactor

  i need to send a file to a webserver using libcurl. i saw one of the examples in the curl website and am trying to implement it. it is the postit2.c example. can someone tell me how i might extend this to be able to send username and password as well

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• Repair FoxPro Database - recommended tools?

  - by Tariq Ahmed

  Hi there - I know zilch about FoxPro, but we're using a product that has a FoxPro DB that we suspect has errors in it. Any recommended tools for analyzing/repairing? Someone mentioned DBFDoctor. Suggestions sought. Thanks!

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• ASP.NET messageboard that is PnP?

  - by Jim Beam

  What are some of the better messageboard components that are available for an ASP.NET site. I currently have a site in C#/Ajax (FW 3.5) that I would like to add a messageboard to (also have a SQL Server db). Can someone recommend a component that can be easily added?

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• How to access a simple file or folder from Tomcat webapps folder

  - by Ankur

  I want to be able to access a folder from my tomcat webapps folder so that I can give someone a URL like: http://localhost:8080/myFolder/myFile.f And in a web browser if they point to this they should start downloading the file. But in reality I get a 404 error when I try to point to this location. How can I solve this or get around it.

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• colorizing UIbuttons

  - by Joey

  Does someone know how to colorize a UIButton (iphone)? I have a greyscale image with alpha that I want to colorize to various different colors. Setting things like background color only shade the entire image without respecting the alpha. Is there a straightforward way to do this, or will I need to subclass UIButton and overload the drawRect method perhaps? Thanks.

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• Convert this Linq query from query syntax to lambda expression

  - by Jinkinz

  I'm not sure I like linq query syntax...its just not my preference. But I don't know what this query would look like using lambda expressions, can someone help? from securityRoles in user.SecurityRoles from permissions in securityRoles.Permissions where permissions.SecurableEntity.Name == "Unit" && permissions.PermissionType.Name == "Read" orderby permissions.PermissionLevel.Value descending select permissions There is a many-to-many relationship between users and security roles that makes this extra confusing. Thanks! Kelly

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• Turning a string into a Uri... (Android)

  - by James Rattray

  I have a string, 'songchoice' I want it to become a 'Uri' so I can use with MediaPlayer.create(context, Uri) Can someone help me to convert songchoice to the Uri? Thanks, James

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• ASP.NET: Where can I find a fast custom membership provider

  - by Luke101

  is there any custom asp.net membership providers that someone has already created online. I want to use a custom provider because their role provider is very sluggish and I would like to use integers instead of guids for user IDs

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• Adding Events To WinForms?

  - by Soo

  Happy Friday! :D I have a TextBox on a WinForm and I want to execute some code every time someone presses a key inside of that TextBox. I'm looking at the events properties menu, and see the "KeyDown" event, but don't know how to add code to it. Happy coding

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• F# and Scala comparison

  - by sumek

  Could someone describe what are the differences between those two languages? Other that they target different VM of course ;)

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• Logic Group 3D secure

  - by NoOne

  I'm about to implement 3D secure with "The Logic Group". Can someone please provide brief idea on how to use iframe with examples?

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• Redefinition Error

  - by ahmed-zeb

  I am converting an MFC application for deadlock detection in to Simple console application. During this process I found many errors saying like error C2365: 'CmdLockMutex' : redefinition; previous definition was 'enumerator' I am unable to remove this error. Kindly if someone could help me in this regard.

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• "Closures are poor man's objects" - What does this mean?

  - by Rahul G

  Closures are poor man's objects and vice versa. I have seen this statement at many places on the web (including SO) but I don't quite understand what it means. Could someone please explain what it exactly means? If possible, please include examples in your answer. Thanks.

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• Blackberry buffered playback demo??

  - by Bohemian

  Can someone help me to buffer a mp3 file on a server using the Blackberry buffered pllayback demo app provided with the jde? I hav loaded it in the simulator. And my mds is started but I m unable to play the audio. There is no error but it doesnt play/load. The code looks all fine. Thanks

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• C# webbrowser navigating to special folders

  - by gil

  Hi, I have c# application that includes webbrowse control. Recently I could not navigate it to My Computer and My NetworkPlaces. Can someone help? Thanks, gil

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• perl equivlant module to pydbg module

  - by donv

  Could someone suggest a perl module equivlant/or has the most funcionality of the pydbg module on python http://pedram.redhive.com/PaiMei/docs/PyDbg/ ?

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