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• jquery change element to element

  - by Isis

  Hello <div class="leftlink" id="mcontacts"> <img src="test.gif" class="arrowred"/> <a href="/contacts/" class="u">????????</a> </div> if(window.location == 'http://my.site.com/contacts/') { $('.menuwelcome').css('display', 'block'); $('.leftlink').find('????????').css('font-weight', 'bold'); $('#mcontacts').find('a').html('<b>????????</b>').remove(); } How do remove tag "a" html, and change his for '<b>????????</b>' ? =) Than you, sorry for bad english

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• the correct actionscript to find if object already exists

  - by touB

  I have a Rect object that I'd like to create and set its properties only once. After that, I want to just modify its properties since it already exists. This is my general idea if(theRect == undefined){ Alert.show("creating"); var theRect:Rect = new Rect(); //then set properties addElement(theRect); //then add it using addElement because addChild() does not work } else { Alert.show("updating"); //no need to create it since it's already been created //just access and change the properties } I tried several ways and combinations for the if conditional check: if(theRect == undefined){ if(theRect == null){ declaring and not declaring `var theRect:Rect;` before the if check declaring and instantiating to null before the if check `var theRect:Rect = null;` but can't get the desired effect. Everytime this code block runs, and depending on which version I've used, it either gives me a "can't access null object" error or the if statement always evaluates to true and creates a new Rect object and I get the "creating" Alert. What's the right way of creating that Rect but only if doesn't exist?

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• XSL - Get attribute of previous element

  - by Chris

  In the if block below I want to be also test whether @Timestamp is smaller than the previous Message's timestamp. How can I achieve this? <xsl:for-each select="Message"> <xsl:sort select="position()" data-type="number" order="descending"/> <xsl:variable name="newclass"> <xsl:if test="@Timestamp + 60 &gt; $ctimestamp">new</xsl:if> </xsl:variable> <tr><td class="debugtime"> <xsl:value-of select="@Time"/> </td><td class="{$newclass}"> <xsl:value-of select="node()"/> </td></tr> </xsl:for-each>

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• How to profiling my C++ application on linux

  - by richard

  HI, I would like to profile my c++ application on linux. I would like to find out how much time my application spent on CPU processing vs time spent on block by IO/being idle. I know there is a profile tool call valgrind on linux. But it breaks down time spent on each method, and it does not give me an overall picture of how much time spent on CPU processing vs idle? Or is there a way to do that with valgrind. Thank you.

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• Automatic Step over

  - by Vaccano

  I have been getting this error message when I step into some methods Do you want to continue being notified when an Automatic step over occurs? I usually answer Yes and I get taken to the line I want to step to. However, I just pressed No (cause I was tired of the dialog box always popping up). When I did that it skipped a lot of code I wanted to step through. Now when I step into my method it is skipping my method (and jumping to the finally block because the method I am trying to step into is throwing an exception). How can I change my answer back to Yes? I would prefer it never ask me (default showing the code), but if faced with the choice of it skipping the code I need to see, or having a NagBox, I will take the NagBox.

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• thoughts on making a widget?

  - by Haroldo

  I'm only going to be able to get each site that wants my widget, to copy and paste the code block in once.. So it needs to be really future proof. I've thought about this for a while and this is the widget code i've come up with : <script type="text/javascript" src="http://www.mydomain.com/my-future-proof-widget.js"></script> <div id="mywidget"></div> would this be the best plan? could this create any limitations? any other thoughts on widgetry?!

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• How can you prevent a window being captured by Print-Screen?

  - by John

  I noticed a few times than when I print-screen while Media Player is running, the content is replaced with a grey rectangle. I've no idea if it's deliberate due to DRM, or some technical issue, but it struck me that being able to deliberately block screen-capture might be a useful feature in some scenarios. Is there some specific message each HWND gets for print-screen - does Windows do a special repaint or simply dump buffers to the clipboard? I guess I'd prefer to focus this on Win32 specifically, but as long as it's Windows-related then fine.

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• h3 tag text/image replacement, does this hurt seo?

  - by Mike007

  I'm trying to "replace" text with an image in all of my h3 tags. I want the image to be in the html to avoid multiple h3 classes as this is being done for a portfolio and there will be about 10 h3 tags on the page. My question is, will this be viewed as an attempt to hide, stuff keywords by google for seo purposes? If it will then does anyone know a better way to accomplish this? CSS: h3 { display: block; width: 156px; height: 44px; overflow: hidden; } Html: <h3><img src="images/project001.png" alt="Recent Projects" />Recent Projects</h3>

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• What happens if an asynchronous delegate call never returns?

  - by RichardHowells

  I found a decent looking example of how to call a delegate asynchronously with a timeout... http://www.eggheadcafe.com/tutorials/aspnet/847c94bf-4b8d-4a66-9ae5-5b61f049019f/basics-make-any-method-c.aspx. In summary it uses WaitOne with a timeout to determine if the call does not return before the timeout expires. I also know that you should have an EndInvoke to match each BeginInvoke. So what happens if the wait timeout expires? We (presumably) DON'T want to call EndInvoke as that will block. The code can go on to do 'other things', but have we leaked anything? Is there some poor thread someplace blocked waiting for a return that's never going to happen? Have we leaked some memory where the result-that-will-never-return was going to be placed?

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• I want to make my own Malloc

  - by Unknown

  I want to make my own malloc/free so I can make a precise copying allocator. Any gurus have any tips and suggestions? I have a few questions for now: Should I just malloc large chunks of memory, and then distribute from that so I don't have to call the system calls? How are copying collectors usually done? I would imagine that this part is a bit complicated to do efficiently. My naive implementation would just malloc a block the size of the remaining objects which would require 2x the space.

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• The Scala way to use one actor per socket connection

  - by Stefan

  I am wondering how it is possible to avoid one socket connection pr. thread in Scala. I have thought a lot about it, but I always end up with some code which is listening for incoming data for each client connection. The problem is that I want to develop an application which should simultanously handle perhaps a couple of thousand connections. However I will of course not want to create a thread for each connection because of the lack of scalability and context switching. What would be the "right" way to do this. In my world it should be possible to have one actor for each connection without the need to block one thread per actor.

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• any way to simplify this with a form of dynamic class instantiation?

  - by gnychis

  I have several child classes that extend a parent class, forced to have a uniform constructor. I have a queue which keeps a list of these classes, which must extend MergeHeuristic. The code that I currently have looks like the following: Class<? extends MergeHeuristic> heuristicRequest = _heuristicQueue.pop(); MergeHeuristic heuristic = null; if(heuristicRequest == AdjacentMACs.class) heuristic = new AdjacentMACs(_parent); if(heuristicRequest == SimilarInterfaceNames.class) heuristic = new SimilarInterfaceNames(_parent); if(heuristicRequest == SameMAC.class) heuristic = new SameMAC(_parent); Is there any way to simplify that to dynamically instantiate the class, something along the lines of: heuristic = new heuristicRequest.somethingSpecial(); That would flatten that block of if statements.

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• Is there a way to check if a host is up?

  - by Rob

  I'm trying to do this in PHP. I need to check if a specified host is "up" I thought of pinging the specified host (though I'm not sure how I would, since that would require root. --help here?) I also though of using fsockopen() to try to connect on a specified port, but that would fail too, if the host wasn't listening for connections on that port. Additionally, some hosts block ping requests, so how might I get around this? This part isn't a necessity, though, so don't worry about this too much. I realize this one might get tricky.

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• How to properly design a simple favorites and blocked table?

  - by Nils Riedemann

  Hey, i am currently writing a webapp in rails where users can mark items as favorites and also block them. I came up two ways and wondered which one is more common/better way. 1. Separate join tables Would it be wise to have 2 tables for this? Like: users_favorites - user_id - item_id users_blocked - user_id - item_id 2. single table users_marks (or so) - users_id - item_id - type (["fav", "blk"]) Both ways seem to have advantages. Which one would you use and why?

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• Struts2 scriptlet

  - by Bret

  Using struts2 with jsp with standard struts tag libraries. I'm trying to dynamically hide a DIV on page load, but still send it to the browser. This is so I can show it later via javascript. The request objects one and two are not easily referenced via a jsp:usebean tag. (They are enums and cannot be instantiated) I tried using a combination of s:if tags or c:if tags and it just looks ugly. <% String displayStr = "display: none;"; if(request.getAttribute("one") != null || request.getAttribute("two") != null ) { displayStr = "display: block;"; } %> <div id="next" style="<%=displayStr %>"> Any suggestions for a better way to do this?

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• jquery for loop on click image swap

  - by user2939914

  I've created a for loop of images. I would like each image to swap with another image on click individually. Here's the jQuery I've written so far: for ( var i = 1; i < 50; i++) { $('article').append('<div class="ps-block" id="' + i + '"><img src="img/bw/' + i + 'bw.png"></div>'); } $('img').click(function() { var imgid = $(this).attr('id'); $(this).attr("src", "img/color/" + imgid + ".png"); }); I also attempted to use this code inside the for loop after the append, but i ends up returning 50 every time you click since the loop has already ran: $('img[src="img/bw/' + i + 'bw.png"]').click(function() { $(this).attr("src", "img/color/" + this.id + ".png"); }); Thanks!

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• How to read output of android process command

  - by kevdliu

  I am trying to get the output of android shell command 'getprop' with java since getprop() always returns null no matter what. I tried this from developer.android.com: Process process = null; try { process = new ProcessBuilder() .command("/system/bin/getprop", "build.version") .redirectErrorStream(true) .start(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } InputStream in = process.getInputStream(); //String prop = in.toString(); System.out.println(in); process.destroy(); However what is printed is not the output but a bunch of characters and numbers (dont have the exact output right now). How can i get the output of the process? Thanks!

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• how to delete element created with jquery ?!

  - by mehdi

  hi , i have write this block of code in jquery to create three element after some events $('body').append( tmp= $('<div id="tmp"></div>') ); $('<div id="close" />').appendTo("#tmp"); $('<div id="box-results" />').appendTo('#tmp'); this three elements are created normally and added to my DOM but i want to remove them with some function like this : $("#close").click(function(e){ e.preventDefault(); $("#tmp").remove(); //$("#overlay").remove(); }); and after i click close div noting happen ! what's wrong with my code ?

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• What does "Only catch exceptions you can handle" really mean?

  - by KyleLib

  I'm tasked with writing an Exception Handling Strategy and Guidelines document for a .NET/C# project I'm working on. I'm having a tough go at it. There's plenty of information available for how/when to throw, catch, wrap exceptions, but I'm looking for describing what sorts of things should go on inside the catch block short of wrapping and throwing the exception. try { DoSomethingNotNice(); } catch (ExceptionICanHandle ex) { //Looking for examples of what people are doing in catch blocks //other than throw or wrapping the exception, and throwing. } Thanks in advance

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• Prevent .htaccess syntax error

  - by seengee

  Hi, As part of one our system's we enable a user in the backoffice to add a block of 301 redirects should they need to. This is just a textarea which then populates a specific area of a .htaccess file. As much as this may seem insecure it has only previously used internally by people who know what they are doing but for various reasons they cannot access the specific file. We need now to allow more access to this function, not for the general public, but for people that probably have far less knowledge of regexp etc and syntax in htaccess files. Obviously the major concern here is the user enters some bad syntax and makes their entire site, including the backoffice where they could fix the issue, totally inaccessible without manual intervention. What approaches can i take to make sure that they do not break their site? A htaccess syntax check? copy the file elsewhere and check it doesnt generate a 500 error (with cURL or similar)?. Would welcome any ideas. Thanks.

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• Change Modul popup every 30 sec Javascript

  - by SoftwareDeveloper

  I have a div id called modalpage and have css. I need a javascript function which can dynamically shows popup for 20 mins and change in every 30 secs right now i have the following javascript function. Can anybody help me please <script language="javascript" type="text/javascript"> function revealModal(divID) { window.onscroll = function () { document.getElementById(divID).style.top = document.body.scrollTop; }; document.getElementById(divID).style.display = "block"; document.getElementById(divID).style.top = document.body.scrollTop; } which is called by a input id button. <input id="Button1" type="button" value="Click here" onclick="revealModal('modalPage')" /> Thanks

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• Mixing synchronized() with ReentrantLock.lock()

  - by yarvin

  In Java, do ReentrantLock.lock() and ReetrantLock.unlock() use the same locking mechanism as synchronized()? My guess is "No," but I'm hoping to be wrong. Example: Imagine that Thread 1 and Thread 2 both have access to: ReentrantLock lock = new ReentrantLock(); Thread 1 runs: synchronized (lock) { // blah } Thread 2 runs: lock.lock(); try { // blah } finally { lock.unlock(); } Assume Thread 1 reaches its part first, then Thread 2 before Thread 1 is finished: will Thread 2 wait for Thread 1 to leave the synchronized() block, or will it go ahead and run?

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• Substitute all matches with values in Ruby regular expression

  - by Lewisham

  Hi all, I'm having a problem with getting a Ruby string substitution going. I'm writing a preprocessor for a limited language that I'm using, that doesn't natively support arrays, so I'm hacking in my own. I have a line: x[0] = x[1] & x[1] = x[2] I want to replace each instance with a reformatted version: x__0 = x__1 & x__1 = x__2 The line may include square brackets elsewhere. I've got a regex that will match the array use: array_usage = /(\w+)\[(\d+)\]/ but I can't figure out the Ruby construct to replace each instance one by one. I can't use .gsub() because that will match every instance on the line, and replace every array declaration with whatever the first one was. .scan() complains that the string is being modified if you try and use scan with a .sub()! inside a block. Any ideas would be appreciated!

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• Getting all inner classes by reflection

  - by Roman

  I have the following problem. I have this pretty class and now I want to get all the classes that extend that class (inner classes ) and fill 'classList' with it. ( in an automatic way of course ) public abstract class CompoundReference { private static List<Class<? extends CompoundReference>> classList = new ArrayList<Class<? extends CompoundReference>>(); @CompoundKey(gsType = User.class, dbType = UserDetailsMappings.class) public static class CUser extends CompoundReference { } @CompoundKey(gsType = Catalog.class, dbType = CatalogDetailsMappings.class) public static class CCatalog extends CompoundReference { } @CompoundKey(gsType = Product.class, dbType = ProductDetailsMappings.class) public static class CProduct extends CompoundReference { } @CompoundKey(gsType = Category.class) public static class CCategory extends CompoundReference { } @CompoundKey(gsType = Poll.class, dbType = PollDetailsMappings.class) public static class CPoll extends CompoundReference { } // much mroe inner classes Some manual solution would be just to main such a static block , that is something that I dont want to do. static { classList.addAll(Arrays.asList(CUser.class, CCatalog.class, CProduct.class, CCategory.class, CPoll.class, CComment.class, CWebPage.class, CReview.class, CPost.class, CMessage.class, CStory.class,CPicture.class)); }

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• In C# or .NET, is there a way to prevent other threads from invoking methods on a particular thread?

  - by YWE

  I have a Windows Forms application with a BackgroundWorker. In a method on the main form, a MessageBox is shown and the user must click the OK button to continue. Meanwhile, while the messagebox is being displayed, the BackgroundWorker finishes executing and calls the RunWorkerCompleted event. In the method I have assigned to that event, which runs on the UI thread, the Close method is called on the form. Even though the method that shows the message box is still running, the UI thread is not blocking other threads from invoking methods on it. So the Close method gets called on the form. What I want is for the UI thread to block other threads' invokes until the method with the message box has finished. Is there an easy way to do that?

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