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• How does a youtube embed suppress the buffering of a video file?

  - by usingtechnology

  When a youtube video is displayed within an external site, a poster image is displayed but the actual video is not loaded until the user clicks the play button. At that point, the video file begins to buffer and the video plays. This seems to be different than many sites, where a flash video is embedded and the video begins to buffer automatically in the background on page load, regardless of whether the video is set to autoplay or not. How would you set up a flash video (non-youtube) to have the same behavior as youtube, where buffering does not occur at pageload? Is it an output setting that is selected during the flash video rendering process, or is it accomplished using a different method?

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• How to change word recognition in vim spell?

  - by David

  I like that vim 7.0 supports spell checking via :set spell, and I like that it by default only checks comments and text strings in my C code. But I wanted to find a way to change the behavior so that vim will know that when I write words containing underscores, I don't want that word spell checked. The problem is that I often will refer to variable or function names in my comments, and so right now vim thinks that each piece of text that isn't a complete correct word is a spelling error. Eg. /* The variable proj_abc_ptr is used in function do_func_stuff' */ Most of the time, the pieces seperated by underscores are complete words, but other times they are abbreviations that I would prefer not to add to a word list. Is there any global way to tell vim to include _'s as part of the word when spell checking?

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• Python Class Variables Question

  - by zyq524

  I have some doubt about python's class variables. As my understanding, if I define a class variable, which is declared outside the init() function, this variable will create only once as a static variable in C++. This seems right for some python types, for instance, dict and list type, but for those base type, e.g. int,float, is not the same. For example: class A: dict1={} list1=list() int1=3 def add_stuff(self, k, v): self.dict1[k]=v self.list1.append(k) self.int1=k def print_stuff(self): print self.dict1,self.list1,self.int1 a1 = A() a1.add_stuff(1, 2) a1.print_stuff() a2=A() a2.print_stuff() The output is: {1: 2} [1] 1 {1: 2} [1] 3 I understand the results of dict1 and list1, but why does int1 behavior different?

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• hasOwnProperty in javascript

  - by Thiyaneshwaran S

  function Shape() { this.name = "Generic"; this.draw = function() { return "Drawing " + this.name + " Shape"; }; } function welcomeMessage() { var shape1 = new Shape(); //alert(shape1.draw()); alert(shape1.hasOwnProperty(name)); //this is returning false } "welcomeMessage" called on the body.onload event. I expected shape1.hasOwnProperty(name) to return true. But its returning false. Whats the correct behavior?

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• What is the right way to implement communication between java objects?

  - by imoschak

  I'm working on an academic project which simulates a rather large queuing procedure in java. The core of the simulator rests within one package where there exist 8 classes, each one implementing a single concept. Every class in the project follows SRP. These classes encapsulate the behavior of the simulator and inter-connect every other class in the project. The problem that has arisen is that most of these 8 classes are, as is logical i think, tightly coupled and each one has to have working knowledge of every other class in this package in order to be able to call methods from it when needed. The application needs only one instance of each class so it might be better to create static fields for each class in a new class and use that to make calls -instead of preserving a reference in each class for every other class in the package (which I'm certain that is incorrect)-, but is this considered a correct design solution? or is there a design pattern maybe that better suits my needs?

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• When debugging in VS 2008 why does the debugger land on a second return statement?

  - by Hellfire

  When debugging the following console program: class Program { static void Main(string[] args) { Console.WriteLine(DoIt(false)); Console.WriteLine(DoIt(true)); } private static Boolean DoIt(Boolean abort) { try { throw new InvalidOperationException(); } catch(Exception ex) { if (abort) { return true; } Console.WriteLine("Got here"); return false; } } } Why does the IDE land on the second return statement during the second call to DoIt()? The results of the execution is correct but the debugging experience is misleading. Is this a known issue? Is the behavior in VS 2010 the same?

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• TSQL Prefixing String Literal on Insert - Any Value to This, or Redundant?

  - by SethO

  I just inherited a project that has code similar to the following (rather simple) example: DECLARE @Demo TABLE ( Quantity INT, Symbol NVARCHAR(10) ) INSERT INTO @Demo (Quantity, Symbol) SELECT 127, N'IBM' My interest is with the N before the string literal. I understand that the prefix N is to specify encoding (in this case, Unicode). But since the select is just for inserting into a field that is clearly already Unicode, wouldn't this value be automatically upcast? I've run the code without the N and it appears to work, but am I missing something that the previous programmer intended? Or was the N an oversight on his/her part? I expect behavior similar to when I pass an int to a decimal field (auto-upcast). Can I get rid of those Ns?

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• Why does Visual Studio 2008 try to open a project from the wrong folder?

  - by Rising Star

  I'm having a bizarre problem with Visual Studio 2008. I wanted to debug one of the libraries that my web application references. Therefore, I decide to add the project containing the library to my solution so that I can debug them together. The project containing my library sits at c:\webLibs\myproj.vbproj. However, when I try to add the project to my solution, Visual Studio throws the following error: "The project file 'c:\someOtherFolder\myproj.vbproj'. has been moved, renamed, or is not on your computer." As you can see, VS appears to be trying to open a different file than the one I clicked on. I used to have the file in that other location, but not anymore. I've tried restarting VS several times. What could cause this bizarre behavior? Why would Visual Studio try to open my project from the wrong folder?

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• Doubling a number - shift left vs. multiplication

  - by ToxicAvenger

  What are the differences between int size = (int)((length * 200L) / 100L); // (1) and int size = length << 1; // (2) (length is int in both cases) I assume both code snippets want to double the length parameter. I'd be tempted to use (2) ... so are there any advantages for using (1)? I looked at the edge cases when overflow occurs, and both versions seem to have the same behavior. Please tell me what am I missing.

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• Parent - child event jquery

  - by Tom Rider

  I have have a 2 div element. One is child and one is parent like : <div id="p"> <div id="c"> </div> </div> The parent div has 2 event attached click and dblclick and child div has 1 event attached click. Now my problem is when i clicked on the child div the parent div click event also executed. I tried e.stopPropagation(); but still same behavior. Help me ?

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• Button border radius and cursor

  - by noober

  CSS border radius does affect button rendering (I see it's round form), but does not affect how it interacts with the user (I still can click button outside its border). How should I fix it? I see the behavior in Chrome. button { cursor: pointer; outline: none; background-size: 100% 100%; background-color: red; /*transparent;*/ /* It's actually red and ROUND. */ background-position: center center; background-repeat: no-repeat; border: 0px; -webkit-border-top-left-radius: 73px; -webkit-border-top-right-radius: 73px; -webkit-border-bottom-left-radius: 73px; -webkit-border-bottom-right-radius: 73px; width: 146px; height: 146px; background-image: url('leftarrow.png'); } Regards,

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• Zend Framework: How to handle exceptions in Ajax requests?

  - by understack

  Normally when an exception is thrown, Error controller takes command and displays error page with regular common header and footer. This behavior is not wanted in Ajax request. Because in case of error, whole html page is sent over. And in cases where I'm directly loading the content of http response in a div, this is even more unwanted. Instead in case of Ajax request, I just want to receive 'the actual error' thrown by exception. How can I do this? I think, one dirty way could be: set a var in ajax request and process accordingly. Not a good solution.

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• Cast A primitive type pointer to A structure pointer - Alignment and Padding?

  - by Seçkin Savasçi

  Just 20 minutes age when I answered a question, I come up with an interesting scenario that I'm not sure of the behavior: Let me have an integer array of size n, pointed by intPtr; int* intPtr; and let me also have a struct like this: typedef struct { int val1; int val2; //and less or more integer declarations goes on like this(not any other type) }intStruct; My question is if I do a cast intStruct* structPtr = (intStruct*) intPtr; Am I sure to get every element correctly if I traverse the elements of the struct? Is there any possibility of miss-alignment(possible because of padding) in any architecture/compiler?

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• xsl:variable xsl:copy-of select

  - by user1901345

  I have the following XML: Picture 1 Picture 2 Picture 3 While this XSL does what is expected (output the attr of the first picture): It seems to be not possible to do the same inside the variable declaration using xsl:copy-of: Curious: If I just select "$FirstPicture" instead of "$FirstPicture/@attr" in the second example, it outputs the text node of Picture 1 as expected... Before you all suggest me to rewrite the code: This is just a simplified test, my real aim is to use a named template to select a node into the variable FirstPicture and reuse it for further selections. I hope someone could help me to understand the behavior or could suggest me a proper way to select a node with code which could be easily reused (the decission which node is the first one is complex in my real application). Thanks.

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• Preventing the "[YourProgramName] has stopped working" dialog on unhandled exceptions.

  - by Serapth

  I have a WinForm application, with some dependencies on an external library that can on occasion cause an exception outside of the running threads context. As it stands now, this is completely OK behavior ( well, except of course the exception ) and we wired up AppDomain.CurrentDomain.UnhandledException to simply restart the program. The only problem is, the [Your Program] has stopped working like the one below, appears: Is there a way to prevent this dialog from appearing at all, be it in the AppDomain unhandled exception handler or in a config setting, as no end users are going to be reading it and it just holds up resources until it is clicked.

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• dropdown list event is not firing when javascript is used

  - by user1511953

  i have a problem in firing dropdownlist event i have following dropdown asp:dropdownlist id="ddlhello" Runat="server" AutoPostBack="True" onchange="javascript:return ChangeHeader();" i have also added event in code behind i.e. selectedindex change event. Now problem occurs when i execute the page, it executes javascript but server side code doesnot fire, but if i remove this line onchange="javascript:return ChangeHeader();" then server side code fires. when i checked source page it shows me two onchange events associated one for javascript and other for server side. i think that it is picking client side code and neglects server side. I am not pretty sure, so i want to know the behavior reason. And what is the way out for this. i want server and client side code to be executed. i have searched for solutions but i have not found any correct reason. please reply for the same. Thanks in advance

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• Activity.findViewById returning null sporadically

  - by adstro

  From the crash logs that I am getting from the Android market, I can see that some of my users are getting Force Closes caused by NullPointerExceptions when my code tries to access views that are in my application. In one example, my activity makes a call to findViewById() in onCreate() after I call setContentView(). I get an NPE when I try to access the view after the call to findViewById() (still in onCreate). What has me really scratching my head is that this does not happen all of the time (in fact most of the time the code acts as I would expect), but enough to have me concerned. I could add code to always check for null and avoid the NPE, but I would like to understand what could be causing the sporadic behavior. Does anyone know what could be causing this?

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• Why does set key not do anything in AES/SymmetricAlgorithm?

  - by acidzombie24

  This MESSED ME UP hard. I thought i was setting the key but i was not. No exceptions, nothing happen except bad results. Why is there a setter if everything is ignored and no exceptions are thrown when i attempt to write? What is the point of the setter on the Keys property? When i do the below Key value are not changed. After an hour when i realize what was happening i wrote the loop to verify. I also tried aes.Key[0] = val; var b = val == aes.Key[0]; (and messed with it in immediate mode). Why does it have this behavior? Array.Copy(myKey, aes.Key, aes.Key.Length); int i = 0; foreach (var v in aes.Key) { var b = myKey[i++] == v; if (!b) b = b; }

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• Eclipse plugin to measure programmer performance/stats

  - by trenki

  Does anyone know of an Eclipse plugin that can give me some stats about my behavior/usage of the Eclipse IDE? There are quite a few things I would like to know: How often/when do I invoke the "Build All" command (through Ctrl+B) How often does compilation fail/succeed (+ number of errors/warnings) How often do I hit Backspace? (I do that way to often; If pressing that key would give a nasty sound I would in time learn to type correctly in the first place) How many characters/lines of code that I typed do I delete (possibly quite immediately) How (effective/efficient/...) is my Mouse/Keyboard/IDE usage? (Kinda like measuring APM in StarCraft; this could be fun) If there is no such Eclipse plugin around, how complex and time consuming would It be to write a plugin that can accomplish the above?

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• How do you know how much space an NSString (using default font) will occupy on a UITableView section

  - by paul_sns

  Basically I want to copy the behavior in iPhone's Calendar where the day of week (Mon, Tue, Wed) is on the left side of the table's section header (left justified) while the formatted date (Apr 1, 2010, May 1, 2010) based on locale is on the right side of the table's section header (right justified). I was thinking of inserting a variable amount of space in between the day of week and formatted date but I first need to know the actual space consumed by the text on both sides to figure out how much space to add. Hope to hear your thoughts on this. Thanks.

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• VS2008 is very slow on a specific large C++ solution

  - by VioletRose

  I have a solution with 21 C++ projects and 1 VB.NET project. The IDE responds very slowly when I simply move the carret in a file or try to open the menu. The process seems to take 50% of CPU for each movement. It only happens with this solution and only on my machine. The solution has total of 2380 source and header files, of which 1280 are header files. I tried to remove all connection to the source control (Perforce) but it didn't help. Also, I have Visual Assist installed but even after removing it (uninstall), the same behavior continued. Any idea?

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• replay in django + apcahce + mod_wsgi ??

  - by Adam

  I have a simple django page that has a counter on it. I use Apache2 and mod_wsgi to serve it. First, when I enter this page, the counter shows 0, as it should. The second time when I enter the page the counter shows 1 - again, it is the right behavior. The problem begins now, cause when I enter this page the third time, I get 0 again. When I refresh it goes between 0, and 1, clearly using some cache or so. If I wait for some time and then try again, it will show 2, and 3, but will be stuck with those values, till this cache or whatever it is will be flushed, and then the counter continues. Does somebody knows how I can get it work right (the real scenario deals with getting data from the DB, but the problems with this strange cache are the same). BTW, I don't have any caching engine set in my django settings.

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• Problem with Firefox, javascript, and Canvas

  - by Rob

  I'm having a Firefox-specific issue with a script I wrote to create 3d layouts. The correct behavior is that the script pulls the background-color from an element and then uses that color to draw on the canvas. When a user mouses over a link and the background-color changes to the :hover rule, the color being drawn changes on the canvas changes as well. When the user mouses out, the color should revert back to non-hover color. This works as expected in Webkit browsers and Opera, but Firefox chokes on it if mouseout is triggered and no mouseover event follows it. This is easier to see than for me to describe, and it's too much code to post here, so here is a link: http://www.robnixondesigns.com/strangematter/

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• How do I return an object that is able to execute on the server?

  - by mafutrct

  Coming from a Java background, this is the way I'm thinking: The server provides an object to the client. This object should be able to execute on the server. Server: private string _S = "A"; public interface IFoo { void Bar(); } private class Foo : IFoo { void Bar() { _S = "B";} } public IFoo GetFoo() { return new Foo(); } Client: IFoo foo = serverChannel.GetFoo(); foo.Bar(); Remoting is legacy (everyone keeps pointing to WCF instead) and WCF does not support this at all basically ( http://stackoverflow.com/questions/2431510 ), so how should I implement this kind of behavior? Using 3rd party components is possible iff required. I searched on SO but found no similar question. If this has indeed been answered before, just let me know and I'll delete.

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• HTML5 drag & drop: The dragged element content is missing in Webkit browsers.

  - by Cibernox

  I'm trying to implement something similar to a cart where you can drop items from a list. This items (<li> elements) has some elements inside (divs, span, and that stuff). The drag and drop itself works great. But the dragged element's image doesn't show its content in Webkit browsers. My list element has a border an a background color. In Firefox, the image is the whole item. In Webkit browsers, only the dragged element without content. I see the background and border, but without text inside. I tried to make a copy of the element and force it to be the image, but doesn't work. var dt = ev.originalEvent.dataTransfer; dt.setDragImage( $(ev.target).clone()[0], 0, 0); I have a simplified example that exhibit the same behavior: http://jsfiddle.net/ksnJf/1/

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