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• Are unspecified and undefined behavior required to be consistent between compiles?

  - by sharptooth

  Let's pretend my program contains a specific construct the C++ Standard states to be unspecified behavior. This basically means the implementation has to do something reasonable but is allowed not to document it. But is the implementation required to produce the same behavior every time it compiles a specific construct with unspecified behavior or is it allowed to produce different behavior in different compiles? What about undefined behavior? Let's pretend my program contains a construct that is UB according to the Standard. The implementation is allowed to exhibit any behavior. But can this behavior differ between compiles of the same program on the same compiler with same settings in the same environment? In other words, if I dereference a null pointer on line 78 in file X.cpp and the implementation formats the drive in such case does it mean that it will do the same after the program is recompiled?

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• strange situation of UITableView when I want to scroll it

  - by ivanlw

  I'm building an easy app for chatting, each time I type in a sentence, the sentences is added into an array(which used to load the table view in cellForRowAtIndexPath delegate method), then I reload the table view. At last I use the following code to scroll the table view to the bottom if ([self.chatList numberOfRowsInSection:0] != 0) { NSUInteger rowCount = [self.chatArray count]; NSIndexPath* indexPath = [NSIndexPath indexPathForRow:rowCount-1 inSection:0]; [self.chatList scrollToRowAtIndexPath:indexPath atScrollPosition:UITableViewScrollPositionTop animated:YES]; } however, the table view sometimes performs well, sometimes only scrolls to the second to the last line……

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• javascript / jQuery variable problem (possibly caching issue)

  - by waitinforatrain

  Standard AJAX query with jQuery: var globalTitle = ""; var pages = ["a", "b", "c"]; for (var i = 0; i < pages.length; i++) { createpage(pages[i]); } function createpage(title) { globalTitle=title; console.log (globalTitle); //All looks good here $.ajax({ url: "createpage.php?id=" + title, context: document.body, success: success }); } The success() function uses globaltitle which is why I had to declare it global. In the success() function though console.log (globalTitle); constantly gives me "a". It's like the variable is assigned but is then cached every time success() is called. Happens in FF 4 and Chrome 8. Any thoughts?

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• $_COOKIE['cookiefoo'], try to get a cookie

  - by Felix Guerrero

  Hi, I'm newbie with webapps and PHP. I'm trying to get a cookie that it's not created yet, I mean, when I try to load a page that looks for a inexistent cookie I get an error, I tried to get rid of this with a try/catch but not success. This this the code I'm trying: try{ $cookie = $_COOKIE['cookiefoo']; if($cookie){ //many stuffs here } else throw new Exception("there is not a cookie"); } catch(Exception $e){ } How can I achieve this, any ideas, it would be appreciated it.

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• Algorithm of JavaScript "sort()" Function

  - by Knowledge Craving

  Recently when I was working with JavaScript "sort()" function, I found in one of the tutorials that this function does not sort the numbers properly. Instead to sort numbers, a function must be added that compares numbers, like the following code:- <script type="text/javascript"> function sortNumber(a,b) { return a - b; } var n = ["10", "5", "40", "25", "100", "1"]; document.write(n.sort(sortNumber)); </script> The output then comes as:- 1,5,10,25,40,100 Now what I didn't understand is that why is this occurring & can anybody please tell in details as to what type of algorithm is being used in this "sort()" function? This is because for any other language, I didn't find this problem where the function didn't sort the numbers correctly. Any help is greatly appreciated.

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• Toggeling between image

  - by Binaryrespawn

  Hi all, I have two images with which I am using in an anchor tag. I am using jquery toggle on the click event of the anchor tag to swap between images. $(document).ready(function(){ $('#registrationForm').hide(); $('#callform').append("<a id='formlink'>IMAGE 1</a>"); $("#formlink").click(function(){ $('#registrationForm').toggle(function(){ $('#formlink').empty().append(IMAGE 2); }); }); }); This works fine the first time around, however i want to toggle between the two images whenever the other is clicked. Any ideas ?

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• Mvc4 webapi file download with jquery

  - by Ray

  I want to download file on client side from api apicontroller: public HttpResponseMessage PostOfficeSupplies() { string csv = string.Format ("D:\\Others\\Images/file.png"); HttpResponseMessage result = new HttpResponseMessage(HttpStatusCode.OK); result.Content = new StringContent(csv); result.Content.Headers.ContentType = new MediaTypeHeaderValue ("application/octet-stream"); result.Content.Headers.ContentDisposition = new ContentDispositionHeaderValue("attachment"); result.Content.Headers.ContentDisposition.FileName = "file.png"; return result; } 1.How can I popup a download with jquery(octet-stream) from api controller? my client side code: $(document).ready(function () { $.ajax( { url: 'api/MyAPI' , type: "post" , contentType: "application/octet-stream" , data: '' , success: function (retData) { $("body").append("<iframe src='" + retData + "' style='display: none;' ></iframe>"); } }); }); but it was not work!!!Thanks!!

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• jquery add remove objects

  - by Scarface

  Hey guys quick question, I have an add remove script that will add a unique element and should remove it on a click function but does not. I think it is because the added object is not in the DOM when page is loaded but I am not sure how to fix this. IF anyone has any advice I would greatly appreciate it. $(document).ready(function(){ if (action=='content-change'){ $('#droppable2-inner').empty().append('<div id="content-image"><img id="visual-background2" src=' + src + '></div><div id="drop-content" action="drop-image">x</div>'); } $("#drop-content").click(function() { $('#content-image').remove(); }); })

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• Android HTTP get methods

  - by Nick

  I have written a number of applications for blackberry and am just starting in Android. It seems to me that android has a lot more built in functions. I am starting by recreating some of my BB apps on Android and on one I take a few xml sites and parse them out. On blackberry I implemented this by creating a class that extended a thread. I would construct a new instance of this class with the parameters of my http request and it would call a function back in my main class, sending it the results. I am tempted to reuse my code, but am curious if android has something better built in. I have been looking at the handler class as well as possible using a service. Bascially, I would like to start a new thread that will return a document of a specific url. Thanks!

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• Is it possible to change iframe src using javascript exists in page inside that iframe?

  - by Amr ElGarhy

  I want to change the iframe source when something change in this iframe content, the iframe is in a different domian than the parent page. is this can be done or not? I just need to add a hash to this iframe src, so that i can access this hash value from the parent page and do some stuff based on this value. What i did: In the iframe page i wrote: window.location.hash = "close_child"; and in the parent page i wrote: if (document.getElementById("MyIFrameId").src.indexOf("#close_child") > 0) { but i always find that the src is empty

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• iphone - navigation controller - move to first view from last view without traversing all intermedia

  - by satyam

  i'm working on iphone app which will show 4 buttons in first view. on click of a button, it will load a new view with navigation controller. this navigation controller view allows to travel upto 11 sub views. in 11th sub view, i've a reset button. on click of reset button, i've to go back to navigation controllers first view without traversing all the 11 views? is it possible to achieve it? if yes how? if no, what can be the solution?

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• Are browsers permitted to render <ol>s in any order?

  - by ctford

  As I understand the XML spec, the significance of the order of child elements is not guaranteed. XML parsers tend to keep child elements in the same order as they occur in the XML document, but they are under no obligation to do so. If that's so, then are browsers free to render the <li>s in an <ol> in a different order than they occur in the XHTML? Or is it specified in the XHTML spec somewhere that order has to be preserved? I realise that all major browsers will respect the order of my <li>s. I'm just interested in the academic question of whether or not they are technically obliged to.

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• How do you get good line spacing with lpr?

  - by dan

  I'm using lpr with the following flags: lpr -o cpi=12 -o lpi=8 -o page-left=36 -o page-top=36 -o page-bottom=36 But the lines appear too close together. But if I decrease lpi to 6 or something, the font just gets taller. What I really want is control over the amount of space between the lines. My makeshift solution is to insert blank lines in the document using sed G, but ideally I would like to achieve 1.5 line spacing instead of full double-spaced. Is this possible?

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• link_to_remote and jquery accordion

  - by badnaam

  I have a standard jquery ui accordion and I load content into it using a link_to_remote tag (in the accordion header). All this works fine. The problem is, once the content is loaded, I dont want a ajax call, I just want the accordion to fold, like it should normally do. I tried doing this using the following jquery but clicking the header hence the link still makes a request. #lbs_list is the div inside the accordion. $j('#lnk_show_benefit').bind('click', function(e) { if ($j('#lbs_list').is(':visible')) { e.preventDefault(); return false; } else { return true; } });

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• How do i loop an ajax request (using jquery) and jsp

  - by Mrshll187

  <script> //when page is ready do the following $(document).ready(function() { //set interval of refresh setInterval(doAjaxMethod, 1000); }); function doAjaxMethod(id) { $.ajax({ url: "getStatus/"+id, dataType: "json", success: function(json) { $('#ajaxStatus').html(json.status); } }); </script> <% //How can I do something like this int n = object.size(); for(int i=0; i<n; i++) { doAjaxMethod(object.getId()); } %> <div id=ajaxStatus> status updates here </div>

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• jquery element's place when toggeling

  - by Noam Zadok

  i'm building a page, which will have categories that will contain a list of pages to go with them. at first all the list are hidden, and than I click on a category and the list slides down. this is the code of the script: $(document).ready(function() { $('.menu-list').hide(); $('.menu-title').click(function() { if ($(this).next().is(':not(:visible)')) { $('.menu-list:visible').slideUp(); $(this).next().slideDown(); } }); The script works, but the problem is when I'm clicking on a category in a column that has more categories than the other. than the last category is moving to the left and I don't want it to. Here is the code in jsfiddle: http://jsfiddle.net/U7rKX/4/ Can you help me?

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• How to validate the radio button and checkbox?

  - by xasjaiod123

  For radio button: $(document).ready(function() { $('#select-number').click(function() { if ($('input:radio', this).is(':checked')) { return true; } else { alert('Please select something!'); return false; } }); }); It is working fine when no radio button is selected. But When I select the radio button and submit the form Then also it is giving me the alert message 'Please select something!' Is there any good tutorials available for validation using Jquery for newbie.

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• Updating external Flex components from an action

  - by Scott

  Hello, I'm new to Flex and am having trouble understanding Events. I think Events are what I want to use for my situation. I have 2 components, addUser.mxml and listUsers.mxml. I access these from a ViewStack in my main application. When I load listUsers.mxml it shows a list of current users in a datagrid via a HTTPService call. When I add a user using the form on addUser.mxml I would like the datagrid in listUsers.mxml to refresh when I return to that view to show the new user. I've tried several different things with addEventListener and dispatchEvent but can't seem to get it working. Can someone help me with this logic?

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• How to distribute the chance to display each SWF evenly among banner collection?

  - by Michael Mao

  Hi all: I am working on The ausdcf.org to try adding several banner ads in swf format to the top. Everything starts to work, but I've got several questions that need your help: The client chose not to go with Google AdManager, but prefer a "minimal approach" to do this task. What I am trying to do is sort of "mimicking" the way Google AdManager does for banners, that is, to split the chance of each particular swf to be shown to the visitor evenly among the banner collection. Definitely I can add some jQuery code to do this from client-side, a random number generator and if-else statement would work - just $.load() it! However, what if I'd like to make sure those disabled Javascript (is there any now btw?) still be able to see different swfs in each visit. Any suggestion on how to approach this? Many thanks in advance.

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• mysql_close(): supplied argument is not a valid MySQL-Link resource

  - by maxedison

  I'm trying to get the hang of using custom session handlers to store session data in a MySQL database. However, I keep getting the following warning: mysql_close(): supplied argument is not a valid MySQL-Link resource Here's the code I'm using, which I got from here: function _open(){ global $_sess_db; $_sess_db = mysql_connect("localhost", "root", "******"); if ($_sess_db) { return mysql_select_db('style', $_sess_db); } return false; } function _close(){ global $_sess_db; return mysql_close($_sess_db); //error happens here } The full text of the error message ultimately points to the final "return mysql_close($_sess_db);" line. I can confirm that the mysql_connect info does in fact work, and I do have the rest of the session handler functions defined as well. And in case it helps, I get these errors immediately upon page load, without actually calling any of the session handler functions, and without having any current sessions open.

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• jQuery: Replace strings with .each()

  - by Warrantica

  I want a function that replace each li with an image. This is my code: $(document).ready(function(){ var tmphref; var tmpname; var str = '<a href="' + tmphref + '"><img src="http://www.somesite.com/a/' + tmpname[1] + '/avatar-small.jpg /></a>'; $('#somediv li a').each(function(){ tmphref = $(this).attr("href"); tmpname = /http\:\/\/(\w+)\.somesite\.com\//.exec(tmphref); $(this).parent().replaceWith(str); }); }); The image is in this specific path: www.somesite.com/a/username/avatar-small.jpg The code above doesn't work. Any ideas? Thank you in advance.

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• grabbing text in div with jquery

  - by vick

  <a class="source" href="jquery-lead.php?source=<?=$src;?>">3</a> <script type="text/javascript"> $("a.source").live('click', function() { $("#results").load( $(this).attr('href') ); return false; }); </script> I am able to pass $src variable to my php script, but I also want to pass whatever is in the tag. In this case "3", this is going to be a pagination..

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• Optimal ASP.Net cache duration for a large site?

  - by HeroicLife

  I've read lots of material on how to do ASP.Net caching but little on the optimal duration that pages should be cached for. Let's say that I have a popular site with 50,000 pages. The content does not change frequently, so I could cache pages for up to an hour if I wanted. The server has 16 GB of RAM, but database connections are limited. How long should pages be cached for? My thinking is that if I set the cache duration too high (let's say 60 minutes), I will fill up memory with a fraction of the total content, which will continually be shuffled in and out of memory. Furthermore, let's say that 10% of the pages are responsible for 90% of traffic. If the popular pages are hit every second, and the unpopular ones every hour, then a 60 second cache would only keep the load-intensive content cached without sacrificing freshness. Should numerous but rarely-accessed content be cached at all?

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• How to invoke a Servlet (doGet) in a web application on startup?

  - by Dan

  I need to invoke a Servlet on application startup since it contains some application initialization logic. I know I can set load-on-startup configuration, but this will only invoke Servlet’s init method. I need to invoke a doGet method and pass some Url parameters to it. Servlet doGet method expects ServletRequest and ServletResponse objects. Also, since this is clustered application, I need to know exactly what node I am accessing (since one option is just to open a socket and invoke a Servlet). What is the best option to perform this?

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• jQuery changing images with animation and waiting for it to trigger hyperlink

  - by user1476298

  I want to switch images on .click() using the url attr I can do so, but I can't figure out how to make it wait, until the animation is done to redirect to the new webpage. Here's the js $(function() { $('.cv').click(function(){ $("#cv img").fadeOut(2000, function() { $(this).load(function() { $(this).fadeIn(); }); $(this).attr("src", "images/cv2.png"); return true; }); }); }); Here's the html: <div id="cv" class="img one-third column"> <a class="cv" target="#" href="cv.joanlascano.com.ar"> <img src="images/cv1.png" alt="Curriculum"/> <br />CV</a> </div> Thank you in advantage!

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