You can use either [`$().jquery;`][1] or [`$.fn.jquery`][1] which will return a string containing the version number, e.g. `1.6.2`.

[1]: http://api.jquery.com/jquery-2/

FYI, for the cases where your page is loading with other javascript libraries like mootools that are conflicting with the `$` symbol, you can use `jQuery` instead.

For instance, `jQuery.fn.jquery` or `jQuery().jquery` would work just fine:

![screen shot for checking jQuery version][1]


  [1]: http://i.stack.imgur.com/2m8wZ.png

`$().jquery` will give you its version as a string.



    $()[&#39;jquery&#39;]

Invoke `console.log($())` and take note about jquery  object fields : 

 - jquery 
 - selector
 - prevObject

![enter image description here][1]


  [1]: http://i.stack.imgur.com/ZGxVd.png


For older versions of jQuery

    jQuery().jquery  (or)
    
    jQuery().fn.jquery


For newer versions of jQuery

    $().jquery  (or)
    
    $().fn.jquery

You can get the version of the jquery by simply printing `object.jquery`, the `object` can be any object created by you using `$`. 

For example: if you have created a `&lt;div&gt;` element as following

    var divObj = $(&quot;div&quot;);

then by printing `divObj.jquery` will show you the version like 1.7.1 

Basically `divObj` inherits all the property of `$()` or `jQuery()` i.e if you try to print `jQuery.fn.jquery` will also print the same version like 1.7.1

    console.log( &#39;You are running jQuery version: &#39; + $.fn.jquery );

From today, when I tried to run an app in NetBeans on a 2.3.3 Android platform, it shows me that:

&gt;Failed to allocate memory: 8
&gt;
&gt;This application has requested the Runtime to terminate it in an unusual way.
&gt;Please contact the application&#39;s support team for more information.

and the Emulator doesn&#39;t want to start.

This is for the first time when I see it, and google has no asnwers for this, I tried even with 2 versions of NetBeans 6.9.1 and 7.0.1, still the same error.

Failed to allocate memory: 8

I need to remove spaces from the end of a string. How can I do that?
Example: if string is `&quot;Hello    &quot;` it must become `&quot;Hello&quot;`

Trim spaces from end of a NSString

Is there a way to find out what version of jQuery is being used by inspecting the `jQuery` object? jQuery is dynamically getting added to my page and I cannot see any reference to it in my markup. If I inspect it in my browser&#39;s console, it&#39;s there.

Get jQuery version from inspecting the jQuery object

<p>Is there a way to find out what version of jQuery is being used by inspecting the <code>jQuery</code> object? jQuery is dynamically getting added to my page and I cannot see any reference to it in my markup. If I inspect it in my browser's console, it's there.</p>


In javascript I have seen `i++` used in many cases, and I understand that it adds one to the preceding value:

&lt;!-- begin snippet: js hide: false console: true babel: false --&gt;

&lt;!-- language: lang-js --&gt;

    for (var i=1; i&lt;=10; i++) {
      console.log(i);
    }

&lt;!-- end snippet --&gt;

But what happens when I do this:

    ++i;

And is it any different using the `--` operator (besides of course that it&#39;s subtraction rather than addition)?

javascript i++ vs ++i

Is it possible to hide the Javascript code from the html of a webpage, when the source code is viewed through the browsers View Source feature? 

I know it is possible to obfuscate the code, but I would prefer it being *hidden* from the view source feature.

How do I hide javascript code in a webpage?

I have an array with a list of objects. I want to split this array at one particular index, say 4 (this in real is a variable). I want to store the second part of the split array into another array. Might be simple, but I am unable to think of a nice way to do this.

split an array into two based on a index in javascript

I see that the [MediaElement](http://www.w3.org/TR/html5/video.html#htmlmediaelement) interface exposes attributes like `paused`, `seeking`, and `ended`. Missing from the list, however, is `playing`.

I know there are [`playing` events](http://www.w3.org/TR/html5/video.html#event-media-playing) that fire when an element _starts_ playing, and [`timeupdate` events](http://www.w3.org/TR/html5/video.html#event-media-timeupdate) events periodically while playing, but I&#39;m looking for a way to determine whether a video is playing _right now_. Is there an easy way to determine this?

The closest I&#39;ve got is:

    !(video.paused || video.ended || video.seeking || video.readyState &lt; video.HAVE_FUTURE_DATA)

How to tell if a &lt;video&gt; element is currently playing?

Let&#39;s say you have the below code:

    function A() {
        function modify() {
           x = 300;
           y = 400;
        }

        var c = new C();
    }

    function B() {
        function modify(){
           x = 3000;
           y = 4000;
        }

        var c = new C();
    }

    C = function () {
       var x = 10;
       var y = 20;
       
       function modify() {
          x = 30;
          y = 40;
       };
    
       modify();
       alert(&quot;The sum is: &quot; + (x+y));
    }

Now the question is, if there is any way in which I can override the method `modify` from `C` with the methods that are in `A` and `B`. In Java you would use the `super`-keyword, but how can you achieve something like this in JavaScript?

JavaScript override methods

Is there any elegant way of turning `[$(div), $(span), $(li)]` into `$(div, span, li)`?

What I need is a jQuery-wrapped set of elements instead of an array of jQuery elements.  I would like to do this in as few lines of code as possible, and with minimal (if any) looping.

**Edit:**  For those of you confused by this question, this code is copied and pasted from firebug using console.log on an array of elements that have **already been selected**.

Turn array of jQuery elements into jQuery wrapped set of elements

I&#39;m quite new to jquery and can&#39;t seem to figure out why my code isn&#39;t working. I have a horizontal layout and want to use the scrollLeft() function (which works perfect with this code)

    $(&quot;#next&quot;).click(function() {
	    currentElement = currentElement.next();
	    scrollTo(currentElement);    
	});

	function scrollTo(element) {
	    $(window).scrollLeft(element.position().left);
    }


But ideally, I would like to animate this so that when #next is clicked there is a nice animated effect to the scroll left function

    $(&quot;#next&quot;).click(function() {
	    currentElement = currentElement.next();
	    scrollTo(currentElement);    
	});
    
    function scrollTo(element) {
	    $(window).animate({scrollLeft: element.position().left}, 750);
    }
But to no avail. What am I doing wrong?

jquery: animate scrollLeft

I need to know when any checkbox on the page is checked:

e.g.

    &lt;input type=&quot;checkbox&quot;&gt;

I tried this in Jquery

    $(&#39;input type=[&quot;checkbox&quot;]&#39;).change(function(){
	alert(&#39;changed&#39;);
    });

But it didn&#39;t work, any ideas?

How to listen to when a checkbox is checked in Jquery

I am well aware it can be done and I&#39;ve looked at quite a few places (including: https://stackoverflow.com/questions/5014216/best-practice-for-saving-an-entire-collection). But  I&#39;m still not clear &quot;exactly how&quot; is it written in code? (the post explains it in English. It&#39;d be great to have a javascript specific explanation :)

Say I have a collection of models - the models themselves may have nested collections. I have overridden the toJSON() method of the parent collection and I am getting a valid JSON object. I wish to &quot;save&quot; the entire collection (corresponding JSON), but backbone doesn&#39;t seem to come in-built with that functionality.

    var MyCollection = Backbone.Collection.extend({
    model:MyModel,
    
    //something to save?
    save: function() {
       //what to write here?
     }
    
    });

I know somewhere you have to say:

    Backbone.sync = function(method, model, options){
    /*
     * What goes in here?? If at all anything needs to be done?
     * Where to declare this in the program? And how is it called?
     */
    }


Once the &#39;view&#39; is done with the processing it is responsible for telling the collection to &quot;save&quot; itself on the server (capable of handling a bulk update/create request). 

Questions that arise:

 1. How/what to write in code to &quot;wire it all together&quot;?
 2. What is the &#39;right&#39; location of the callbacks and how to specify a &quot;success/error&quot; callback? I mean syntactically?I&#39;m not clear of the syntax of registering callbacks in backbone...

If it is indeed a tricky job then can we call jQuery.ajax within a view and pass the &lt;code&gt;this.successMethod&lt;/code&gt; or &lt;code&gt;this.errorMethod&lt;/code&gt; as success/error callbacks?? Will it work?

I need to get in sync with backbone&#39;s way of thinking - I know I&#39;m definitely missing something w.r.t., syncing of entire collections.

&quot;How&quot; to save an entire collection in Backbone.js - Backbone.sync or jQuery.ajax?

I am building something called the &quot;HTML Quiz&quot;. It&#39;s completely ran on JavaScript and it&#39;s pretty cool.

At the end, a results box pops up that says &quot;Your Results:&quot; and it shows how much time they took, what percentage they got, and how many questions they got right out of 10. I would like to have a button that says &quot;Capture results&quot; and have it somehow take a screenshot or something of the div, and then just show the image captured on the page where they can right click and &quot;Save image as.&quot;

I really would love to do this so they can share their results with others. I don&#39;t want them to &quot;copy&quot; the results because they can easily change that. If they change what it says in the image, oh well.

Does anyone know a way to do this or something similar? 

Content Type	Original Author	Original Content on Stackoverflow
Question	Jeff	View Question on Stackoverflow
Solution 1 - Javascript	David Hancock	View Answer on Stackoverflow
Solution 2 - Javascript	Devy	View Answer on Stackoverflow
Solution 3 - Javascript	ShankarSangoli	View Answer on Stackoverflow
Solution 4 - Javascript	Abdennour TOUMI	View Answer on Stackoverflow
Solution 5 - Javascript	Mahendra Jella	View Answer on Stackoverflow
Solution 6 - Javascript	Arun Kumar	View Answer on Stackoverflow
Solution 7 - Javascript	Lakshmana Kumar D	View Answer on Stackoverflow

Get jQuery version from inspecting the jQuery object

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Trim spaces from end of a NSString

Failed to allocate memory: 8

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