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• Is this pointer initialization necessary?

  - by bstullkid

  Lets say I have the following: CHARLINK * _init_link(CHARLINK **link) { short i; (*link)->cl = (CHARLINK **) calloc(NUM_CHARS, sizeof(CHARLINK *)); for (i = 0; i < NUM_CHARS; i++) (*link)->cl[i] = NULL; return (*link); } Is the loop to initialize each element to NULL necessary or are they automatically NULL from calloc?

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• XS:Group causes Schema to fail validation

  - by paulwhit

  I have an XML document based on a Schema that uses the xs:group element to bunch elements together. The result is an entity where name, address and phone number are defined in a group. This fails Schema validation in MS (Visual Studio) as well as XERCES (oXygen XML editor) Is there a workaround?

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• jQuery, Animate opacity to 1 then remove the opacity property to make it better looking on IE

  - by Emily

  Hi everyone, I tried the jQuery fadeIn animation in all browsers and it work good, but not that much on IE. the Alpha png images are so creepy after appending the CSS opacity, but i have an idea and i don't know how to implement it using jQuery. The idea is to fadeIn the element and when the animation is finished it will automatically remove the opacity property in order to make the picture quality better. How to do that? Note: i'm using Animate and not FadeIn. Thanks

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• jquery: selecting all elements where attribute is greater than a value

  - by Ankur

  I know that to filter an element with an atttribute called attrName which has value attrValue I do: filter("[attrName='attrValue']") but looking at the docs http://api.jquery.com/category/selectors/ I can't see an option to select all elements s.t. attrNameattrValue Will this work filter("[attrName>'attrValue']")

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• Jquery StopPropagation not working in firefox

  - by Karim Mortabit

  I have this code working on Safari and Chrome , but not in Firefox . Is firefox having a problem with StopPropagation() ? $(function() { // Setup drop down menu $('.dropdown-toggle').dropdown(); // Fix input element click problem $('.login-menu form').click(function(e) { alert( e.isPropagationStopped() ); e.stopPropagation(); alert( e.isPropagationStopped() ); }); });

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• Sparse linear program solver

  - by Jacob

  This great SO answer points to a good sparse solver, but I've got constraints on x (for Ax = b) such that each element in x is >=0 an <=N. The first thing which comes to mind is an LP solver for large sparse matrices. Any ideas/recommendations?

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• WPF ToolBar: how to customize appearance (remove dots on the left)

  - by Nike

  I use ToolBar for my WPF application. As I understand, there is no easy way to make it floating. I just want to remove element which I don't want to be displayed: several dots in the left side of ToolBar. Is there any Properties to customize view of ToolBar? Or, maybe, it's possible to redefine a ToolBar Template?

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• How to set width and height dynamically using jQuery

  - by misha-moroshko

  I would like to set the width and the height of the div element dynamically using jQuery. I was trying to replace <div id="mainTable" style="width:100px; height:200px;"></div> with this: $("#mainTable").css("width", "100"); $("#mainTable").css("height", "200"); but, it does not work for me. Please help to understand why.

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• CSS style info library

  - by Bobby Jack

  Is anyone aware of a good javascript library to obtain original (i.e. not computed) style for a given element in the DOM? In other words, something one could use to produce the results in Firebug's style tab. Like Firebug, it should take into account inheritance, shortcut properties, and all the other nuances of CSS.

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• match strings in python

  - by mesun

  Write a function, called constrainedMatchPair which takes three arguments: a tuple representing starting points for the first substring, a tuple representing starting points for the second substring, and the length of the first substring. The function should return a tuple of all members (call it n) of the first tuple for which there is an element in the second tuple (call it k) such that n+m+1 = k, where m is the length of the first substring. Complete the definition def constrainedMatchPair(firstMatch,secondMatch,length):

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• Avoiding 'Buffer Overrun' C6386 warning

  - by bdhar

  In my code, I am using an array xyz of 10 objects. When I am trying to access an element of the array using an unsigned int index like this: xyz[level], I get 'Buffer overrun' warning. Logically, I am pretty sure that level won't exceed 10. How to avoid this warning?

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• understanding z buffer formates direct x

  - by numerical25

  A z buffer is just a 3d array that shows what object should be written in front of another object. each element in the array represents a pixel that holds a value from 0.0 to 1.0. My question is if that is all a z buffer does, then why are some buffers 24bit, 32bit, and 16 bit ??

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• Mips, how to read array and print them??

  - by Leon

  okay, C++ and java i have no problem learning or what so ever when it comes to mips it is like hell okay i wanna learn how to read in the an array and print all the element out here is a simple array that i wrote int[] a = new int[20]; for(int i=0; i for(int j=0; j how do you do it in mips

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• Simulating click with javascript on document

  - by Charlie

  Is it possible to simulate a click on a webpage using javascript but without defining a specific element, but rather just specifying the document? I would have liked to do something like this, and if the location happens to have a link, then this will be pressed: function simulateClick(x, y) { var evt = window.createEvent("MouseEvents"); evt.initMouseEvent("click", true, true, window, x, y, x, y, 1, false, false, false, false, 0, null); window.dispatchEvent(evt); }

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• LINQ Except operator and object equality

  - by Abhijeet Patel

  Here is an interesting issue I noticed when using the Except Operator: I have list of users from which I want to exclude some users: The list of users is coming from an XML file: The code goes like this: interface IUser { int ID { get; set; } string Name { get; set; } } class User: IUser { #region IUser Members public int ID { get; set; } public string Name { get; set; } #endregion public override string ToString() { return ID + ":" +Name; } public static IEnumerable<IUser> GetMatchingUsers(IEnumerable<IUser> users) { IEnumerable<IUser> localList = new List<User> { new User{ ID=4, Name="James"}, new User{ ID=5, Name="Tom"} }.OfType<IUser>(); var matches = from u in users join lu in localList on u.ID equals lu.ID select u; return matches; } } class Program { static void Main(string[] args) { XDocument doc = XDocument.Load("Users.xml"); IEnumerable<IUser> users = doc.Element("Users").Elements("User").Select (u => new User { ID = (int)u.Attribute("id"), Name = (string)u.Attribute("name") } ).OfType<IUser>(); //still a query, objects have not been materialized var matches = User.GetMatchingUsers(users); var excludes = users.Except(matches); // excludes should contain 6 users but here it contains 8 users } } When I call User.GetMatchingUsers(users) I get 2 matches as expected. The issue is that when I call users.Except(matches) The matching users are not being excluded at all! I am expecting 6 users ut "excludes" contains all 8 users instead. Since all I'm doing in GetMatchingUsers(IEnumerable users) is taking the IEnumerable and just returning the IUsers whose ID's match( 2 IUsers in this case), my understanding is that by default "Except" will use reference equality for comparing the objects to be excluded. Is this not how "Except" behaves? What is even more interesting is that if I materialize the objects using .ToList() and then get the matching users, and call "Except", everything works as expected! Like so: IEnumerable users = doc.Element("Users").Elements("User").Select (u = new User { ID = (int)u.Attribute("id"), Name = (string)u.Attribute("name") } ).OfType().ToList(); //explicity materializing all objects by calling ToList() var matches = User.GetMatchingUsers(users); var excludes = users.Except(matches); // excludes now contains 6 users as expected I don't see why I should need to materialize objects for calling "Except" given that its defined on IEnumerable? Any suggesstions / insights would be much appreciated.

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• jQuery Stop non-css animation

  - by Mark

  I'm trying to stop a non-css animation: http://jsbin.com/aqute4/4/edit Button 1 starts the animation nicely, totally lost on how to stop it though, since .stop() seems to need a DOM element... rather than a random object. Thanks in advance. PS: Original code comes from: http://james.padolsey.com/javascript/fun-with-jquerys-animate/

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• Gradient colors in Internet Explorer

  - by Jeremy

  I know that Internet Explorer has some proprietary extensions so that you can do things like create divs with a gradient background. I can't remember the element name or it's usage. Does anyone have some examples or links?

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• How do I find the median of numbers in linear time using heaps?

  - by eSKay

  Wikipedia says: Selection algorithms: Finding the min, max, both the min and max, median, or even the k-th largest element can be done in linear time using heaps. All it says is that it can be done, not how. Can you give me some start on how this can be done using heaps?

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• How can I compare arrays in Perl?

  - by devtech

  I have two arrays, @a and @b. I want to do a compare among the elements of the two arrays. my @a = qw"abc def efg ghy klm ghn"; my @b = qw"def ghy jgk lom com klm"; If any element matches then set a flag. Is there any simple way to do this?

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• NSXMLParser on the iPhone, how do i use it given a xml file (newb here :\)

  - by Kenneth

  Hey guys, was wondering how do i use the NSXML parser. so lets say given i have a simple xml file with elements like 1/1/1000 14:15:16 How could i use the NSXMLParser to parse the XML File(Its on locally btw, desktop), check through each element and store each of them in an array either to be displayed/used later? I was looking through some documentation about it and i absolutely have no idea on how to use the parser i know that there are 3 methods(or more ,please correct me if im wrong) that can be overridden -..etc didStartElement -..etc didEndElement -..etc foundCharacters

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• Assign to a slice of a Python list from a lambda

  - by Bushman

  I know that there are certain "special" methods of various objects that represent operations that would normally be performed with operators (i.e. int.__add__ for +, object.__eq__ for ==, etc.), and that one of them is list.__setitem, which can assign a value to a list element. However, I need a function that can assign a list into a slice of another list. Basically, I'm looking for the expression equivalent of some_list[2:4] = [2, 3].

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• Resize event does not fire in Firefox, but I need to handle focus when FancyBox is shown

  - by Christian Nielsen

  I am working on a solution where I need to have the first input field selected when a fancybox is shown. I have tried reacting to the resize event, which works fine in IE but not in Firefox. Also tried reacting to the click event on the link that opens the box - but aparently this is too early so some other element steals focus afterwards. Any ideas??

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• rails javascript_include_tag

  - by ash34

  Hi, I have a few custom .js files in my public/javascripts folder. The 'javascript_include_tag' adds script tags to the head element. Are these executed in the order in which they appear. If yes, how do I control the order in which these script tags are added to my html. thanks, ash

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• unable to add row to a html-table dynamically using ihtmlducument2 to create tr and td elements and

  - by madhu

  please anyone solve the above problem i'm traversing through the document when i get the tr tag i have created the tr element using createelement later i used insertbefore to insert it into the document but its not working i tried for one week but didn't get any thing

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• How do I declare an array as a constant in Objective-c?

  - by Andrew

  The following code is giving me errors: // constants.h extern NSArray const *testArray; // constants.m NSArray const *testArray = [NSArray arrayWithObjects: @"foo", @"bar"]; The error I get is initializer element is not constant Or if I take away the pointer indicator (*) I get: statically allocated instance of Objective-C class 'NSArray'

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