http://www.cdnjs.com hosts a lot of less popular JavaScript frameworks, including:

* [tag:backbone.js]: `//cdnjs.cloudflare.com/ajax/libs/backbone.js/1.0.0/backbone-min.js` ([HTTP](http://cdnjs.cloudflare.com/ajax/libs/backbone.js/1.0.0/backbone-min.js) | [HTTPS](https://cdnjs.cloudflare.com/ajax/libs/backbone.js/1.0.0/backbone-min.js))

* [tag:underscore.js]: `//cdnjs.cloudflare.com/ajax/libs/underscore.js/1.5.2/underscore-min.js` ([HTTP](http://cdnjs.cloudflare.com/ajax/libs/underscore.js/1.5.2/underscore-min.js) | [HTTPS](https://cdnjs.cloudflare.com/ajax/libs/underscore.js/1.5.2/underscore-min.js))


### For convenience, here are the script tags:

#### Backbone.js

    &lt;script type=&quot;text/javascript&quot;
       src=&quot;//cdnjs.cloudflare.com/ajax/libs/backbone.js/1.0.0/backbone-min.js&quot;&gt;&lt;/script&gt;

#### Underscore.js

    &lt;script
       src=&quot;//cdnjs.cloudflare.com/ajax/libs/underscore.js/1.5.2/underscore-min.js&quot;&gt;&lt;/script&gt;

http://www.jsdelivr.com/ is also a good alternative for less popular frameworks

 * [tag:backbone.js]: //cdn.jsdelivr.net/backbonejs/0.9.10/backbone-min.js 
 * [tag:underscore.js]: //cdn.jsdelivr.net/underscorejs/1.4.3/underscore-min.js

Also in most cases it is a good idea to omit the protocol in the URL for JavaScript source.

More on  http://www.paulirish.com/2010/the-protocol-relative-url/

I&#39;m in the mid of my Android studies, and I just covered the Assets and Raw resources. I&#39;m trying to understand the reason for using Raw resources vs. Assets.

1. They both provide with an uncompiled resource input stream.

2. It seems that Assets provide much more flexibility and functionality than Raw resources.

    a. You can create folder structures under `assets` but not under `raw`

    b. You can list all resources dynamically in the `assets` folder but not in the `raw` folder.

So, why would I use Raw resources in Android?


When should I use the assets as opposed to raw resources in Android?

I have some Perl code where the hex() function converts hex data to decimal. How can I do it on [Python][1]?

  [1]: http://en.wikipedia.org/wiki/Python_%28programming_language%29


How do I convert hex to decimal in Python?

Is there any CDN sources for backbone.js and also underscore.js to use in our projects?

backbone.js &amp; underscore.js CDN recommendation?

<p>Is there any CDN sources for backbone.js and also underscore.js to use in our projects?</p>


Backbone&#39;s documentation states:
&gt; The events property may also be defined as a function that returns an events hash, to make it easier to programmatically define your events, as well as inherit them from parent views.

How do you inherit a parent&#39;s view events and extend them?

## Parent View

    var ParentView = Backbone.View.extend({
       events: {
          &#39;click&#39;: &#39;onclick&#39;
       }
    });

## Child View

    var ChildView = ParentView.extend({
       events: function(){
          ????
       }
    });

Backbone View: Inherit and extend events from parent

It is said that Backbone handles all the higher level abstractions, while jQuery or similar libraries work with the DOM, normalize events and so on..

Could someone please help me understand this statement with any simple practical example.

Also one important feature of MVC framework like Backbone, Knockout is that it keeps the model (data) and the view in sync. But this seems to be specific at a page-level and not across the entire application. So can we have the model/data and the view synced across multiple pages..(kind of global)


Backbone.js and jQuery

I am more into front end development and have recently started exploring Backbone.js into my app. I want to persist the model data to the server.

Could you please explain me the various way to save the Model data (using json format). I am using Java on server side. Also I have mainly seen REST being used to save data. As i am more into front end dev, i am not aware of REST and other similar stuff.

It would be great if someone could please explain me the process with some simple example.

Ways to save Backbone.js model data?

Backbone.js documentation suggest loading bootstrapped models this way: 

    &lt;script&gt;
    var Accounts = new Backbone.Collection;
    Accounts.reset(&lt;%= @accounts.to_json %&gt;);
    var Projects = new Backbone.Collection;
    Projects.reset(&lt;%= @projects.to_json(:collaborators =&gt; true) %&gt;);
    &lt;/script&gt;

But this is a pattern that can&#39;t be used in **AMD approach (using require.js)**

The only possible solution is to declare **global variable storing JSON data** and use this variable later in relevant initialize methods.

Is there a **better way** to do this (without globals)?

How to load bootstrapped models in Backbone.js while using AMD (require.js)

My server has a manual authorization. I need to put the username/password of my server to my backbone request inorder for it to go through. How may i do this? Any ideas? Thank you

add request header on backbone

Is there a hosted version of [Twitter Bootstrap][1]? Something similar to the hosted version of jQuery on Google?


  [1]: http://twitter.github.com/bootstrap/

Is there a hosted version of Twitter Bootstrap?

Some weeks ago Amazon announced that they have lowered the content expiration period:

[Amazon CloudFront Lowers Minimum Content Expiration Period][1]


So much that you can actually set now TTL in CloudFront to 0. So my question is, why could it be useful to have a CloudFront distribution with TTL set to 0. To me this means no caching at all so every request that gets to CloudFront will end up hitting the origin.

What am I missing?


  [1]: http://aws.amazon.com/about-aws/whats-new/2012/03/19/amazon-cloudfront-lowers-minimum-expiration-period/

What is a TTL 0 in CloudFront useful for?

Bootstrap is distributed in CDN in

http://www.bootstrapcdn.com/

* Is it possible to load Bootstrap with Require.JS 2.x (shimmed or native AMD)?  

* How it is possible to load Bootstrap, or any minified JS, directly from CDN URL with Require.js



Loading Bootstrap from CDN with Require.js

&gt; #PAY ATTENTION!
**The Bootstrap icons are back** after [**this pull request merge**](https://github.com/twbs/bootstrap/pull/9767).

&gt;---

&gt;After going back and forth on this for the last couple weeks, I&#39;ve decided to **restore the Glyphicons icon font to the main repo**. Given how prevalent icons are in UIs, it&#39;s probably a disservice to most folks to not include them (or some other icon font) in the same spot as the CSS and JS.

&gt;With this update comes the following:

&gt; - Restores documentation (on the Components page)
- New variables, `@icon-font-path` and `@icon-font-name`, for flexibility in adding and removing icon fonts
- Upgrades to latest Glyphicons (adding 40 new icons)
- Removes the **old Glyphicons mention from the CSS page**


&gt;We&#39;ll work on improving the customization of icon fonts in the future so swapping font libraries can be easier (which was the whole motivation for the original removal).


----

Which is the CDN url of the new version of Twitter Bootstrap Glyphicons? 

From the Bootstrap 3 [they were moved into a separate repository](https://stackoverflow.com/q/17901776/1420197), but I didn&#39;t find any CDN.

From the official documentation:

&gt;With the launch of Bootstrap 3, icons have been moved to a separate repository. This keeps the primary project as lean as possible, makes it easier for folks to swap icon libraries, and makes Glyphicons icon fonts more readily available to more people outside Bootstrap.

On the [official website](http://glyphicons.getbootstrap.com/) they don&#39;t provide a CDN url for icons.

Where can find it? I don&#39;t want to download the repository and include it into my project.

Bootstrap 3 Glyphicons CDN

We have a Cloudfront distribution with custom origin that has been working just fine for quite a long time, serving static assets for one of our sites. Just this morning, we noticed that our logo was displaying as a broken link.

Upon further investigation, Cloudfront is returning a strange error message that I&#39;ve never seen before for the [URL in question][CFLogo]:

&gt; # ERROR
&gt;
&gt; ## The request could not be satisfied.
&gt;
&gt; ------
&gt;
&gt; ------
&gt;
&gt; Generated by cloudfront (CloudFront)

Several other Cloudfront URLs from this distribution return the same error, but then others (again, from the same distribution) are working just fine. I don&#39;t see a pattern to what works and what doesn&#39;t.

Some other data points:

* The [origin URLs][ORLogo] work just fine. There&#39;s been no recent interruption in service, to my knowledge. 
* I&#39;ve invalidated the logo URL specifically, to no effect.
* I&#39;ve invalidated the root URL of the distribution, to no effect.

Any idea what&#39;s going on here? I&#39;ve never seen Cloudfront do this before.

**UPDATE:**

Here&#39;s the verbatim HTTP response from Cloudfront:

    $ http GET https://d2yu7foswg1yra.cloudfront.net/static/img/crossway_logo.png
    HTTP/1.1 502 Bad Gateway
    Age: 213
    Connection: keep-alive
    Content-Length: 472
    Content-Type: text/html
    Date: Wed, 18 Dec 2013 17:57:46 GMT
    Server: CloudFront
    Via: 1.1 f319e8962c0268d31d3828d4b9d41f98.cloudfront.net (CloudFront)
    X-Amz-Cf-Id: H_HGBG3sTOqEomHzHubi8ruLbGXe2MRyVhGBn4apM0y_LjQa_9W2Jg==
    X-Cache: Error from cloudfront

    &lt;!DOCTYPE HTML PUBLIC &quot;-//W3C//DTD HTML 4.01 Transitional//EN&quot; &quot;http://www.w3.org/TR/html4/loose.dtd&quot;&gt;
    &lt;HTML&gt;&lt;HEAD&gt;&lt;META HTTP-EQUIV=&quot;Content-Type&quot; CONTENT=&quot;text/html; charset=iso-8859-1&quot;&gt;
    &lt;TITLE&gt;ERROR: The request could not be satisfied&lt;/TITLE&gt;
    &lt;/HEAD&gt;&lt;BODY&gt;
    &lt;H1&gt;ERROR&lt;/H1&gt;
    &lt;H2&gt;The request could not be satisfied.&lt;/H2&gt;
    &lt;HR noshade size=&quot;1px&quot;&gt;
    &lt;/BODY&gt;&lt;/HTML&gt;

    &lt;BR clear=&quot;all&quot;&gt;
    &lt;HR noshade size=&quot;1px&quot;&gt;
    &lt;ADDRESS&gt;
    Generated by cloudfront (CloudFront)
    &lt;/ADDRESS&gt;
    &lt;/BODY&gt;&lt;/HTML&gt;


[CFLogo]: https://d2yu7foswg1yra.cloudfront.net/static/img/crossway_logo.png
[ORLogo]: https://my.crossway.org/static/img/crossway_logo.png

Cloudfront custom-origin distribution returns 502 &quot;ERROR The request could not be satisfied.&quot; for some URLs

I have this kind of array:

    var foo = [ { &quot;a&quot; : &quot;1&quot; }, { &quot;b&quot; : &quot;2&quot; }, { &quot;a&quot; : &quot;1&quot; } ];

I&#39;d like to filter it to have:

    var bar = [ { &quot;a&quot; : &quot;1&quot; }, { &quot;b&quot; : &quot;2&quot; }];

I tried using _.uniq, but I guess because `{ &quot;a&quot; : &quot;1&quot; }` is not equal to itself, it doesn&#39;t work. Is there any way to provide underscore uniq with an overriden equals function?

Removing duplicate objects with Underscore for Javascript

I am using the excellent [Underscore.js][1] library. I have a specific task which I can do fine using JavaScript or jQuery but was wondering if there was some sort of abstraction avaialable in Underscore that I was missing out on.

Essentially I have an object like so - 

    var some_object_array = [{id: &quot;a&quot;, val: 55}, {id: &quot;b&quot;, val: 1}, {id: &quot;c&quot;, val: 45}];

I want to convert this into -

    var some_map = {&quot;a&quot;: {id: &quot;a&quot;, val: 55}, &quot;b&quot;: {id: &quot;b&quot;, val: 1}, &quot;c&quot;: {id: &quot;c&quot;, val: 45}};

I know that I can use `_.groupBy(some_object_array, &quot;id&quot;)`. But this returns a map like so -

    var some_grouped_map = {&quot;a&quot;: [{id: &quot;a&quot;, val: 55}], &quot;b&quot;: [{id: &quot;b&quot;, val: 1}], &quot;c&quot;: [{id: &quot;c&quot;, val: 45}]};

Note that this does what it is advertised to do. But I was hoping to get `some_map` without iterating over the objects myself.

Any help appreciated.


  [1]: http://underscorejs.org/

Underscore.js: create a map out of list of objects using a key found in the object

Is there a way in Javascript to write something like this easily:

    [1,2,3].times do {
      something();
    }

Any library that might support some similar syntax maybe?

**Update:** to clarify - I would like `something()` to be called 1,2 and 3 times respectively for each array element iteration

do &lt;something&gt; N times (declarative syntax)

I want to do some pre-server-validation of a form in a [Backbone.js ][1] model. To do this I need to get the user input from a form into usable data.
I found three methods to do this:

 1. `var input = $(&quot;#inputId&quot;).val();`
 2. `var input = $(&quot;form.login&quot;).serialize();`
 3. `var input = $(&quot;form.login&quot;).serializeArray();`

Unfortunately, none of the provide a good reabable and developable JSON object which I require. I already looked through several questions on Stack&amp;nbsp;Overflow, but I found only some extra libraries. 

Doesn&#39;t [Underscore.js][2], the current jQuery or Backbone.js provide a helper method?

I can&#39;t imagine there is no request for such a function.

**HTML**

    &lt;form class=&quot;login&quot;&gt;
        &lt;label for=&quot;_user_name&quot;&gt;username:&lt;/label&gt;
        &lt;input type=&quot;text&quot; id=&quot;_user_name&quot; name=&quot;user[name]&quot; value=&quot;dev.pus&quot; /&gt;
        &lt;label for=&quot;_user_pass&quot;&gt;password:&lt;/label&gt;
        &lt;input type=&quot;password&quot; id=&quot;_user_pass&quot; name=&quot;user[pass]&quot; value=&quot;1234&quot; /&gt;
        &lt;button type=&quot;submit&quot;&gt;login&lt;/button&gt;
    &lt;/form&gt;

**JavaScript**

    var formData = $(&quot;form.login&quot;).serializeObject();
    console.log(formData);


**Outputs**

    {
        &quot;name&quot;: &quot;dev.pus&quot;,
        &quot;pass&quot;: &quot;1234&quot;
    }

**Backbone.js model**
    
    var user = new User(formData);
    user.save();

  [1]: https://en.wikipedia.org/wiki/Backbone.js
  [2]: https://en.wikipedia.org/wiki/Underscore.js


Serialize form data to JSON

I&#39;m using the JS library [Underscore][1] and in particular using the **[`_.each`][2]** and **[`_.sortby`][3]** library calls.  I&#39;m wondering if there&#39;s any possible way to get the index of the value within the iterator delegate


    _.sortBy([1, 4, 2, 66, 444, 9], function(num){ 
        /*It&#39;d be great to have access to the index in here */
        return Math.sin(num); 
    });


  [1]: http://underscorejs.org
  [2]: http://underscorejs.org/#each
  [3]: http://underscorejs.org/#sortBy

Content Type	Original Author	Original Content on Stackoverflow
Question	ward87	View Question on Stackoverflow
Solution 1 - backbone.js	Tomasz Nurkiewicz	View Answer on Stackoverflow
Solution 2 - backbone.js	Mite Mitreski	View Answer on Stackoverflow

backbone.js & underscore.js CDN recommendation?

backbone.js Problem Overview

backbone.js Solutions

Solution 1 - backbone.js

For convenience, here are the script tags:

Backbone.js

Underscore.js

Solution 2 - backbone.js

How do I convert hex to decimal in Python?

When should I use the assets as opposed to raw resources in Android?

Attributions