phpjs/_octopress/source/functions/compact/_comments.html

php.js offers community built php functions in javascript

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<strong>
<a href="http://an3m1.com/" rel="nofollow">??????? ????? ???</a>
</strong>
on 2012-04-17 15:28:17 <br />
They have done such a great job with this. This is why they are deserving of these awards. Keep up the good work. 
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<strong>
Brett Zamir
</strong>
on 2008-12-03 17:53:53 <br />
Again, adapting the PHP manual's examples, here is an equivalent for extract():

<pre><code>var size = &amp;quot;large&amp;quot;;
var var_array = {&amp;quot;color&amp;quot; : &amp;quot;blue&amp;quot;,
                   &amp;quot;size&amp;quot; : &amp;quot;medium&amp;quot;,
                   &amp;quot;shape&amp;quot; : &amp;quot;sphere&amp;quot;};
extract(var_array, 'EXTR_PREFIX_SAME', &amp;quot;wddx&amp;quot;);

alert([color, size, shape, wddx_size].join()); // blue,large,sphere,medium</code></pre>


<pre><code>// Only works on global variables

function extract (arr, type, prefix) {
    for (var i in arr) {
        switch (type) {
            case 'EXTR_PREFIX_SAME' || 2:
                if (window[i] !== undefined) {
                   window[prefix+'_'+i] = arr[i];
               }
               // Fall-through
            case 'EXTR_SKIP' || 1:
               if (window[i] === undefined) {
                   window[i] = arr[i];
               }
               break;
            case 'EXTR_PREFIX_ALL' || 3:
               window[prefix+'_'+i] = arr[i];
               break;
            case 'EXTR_PREFIX_INVALID' || 4:
               if(i.match(/^[_a-zA-Z$][\w|$]*$/) != null) { // Refine regexp to allow JS 1.5+ Unicode identifiers
                   window[i] = arr[i];
               }
               else {
                   window[prefix+'_'+i] = arr[i];
               }
               break;
            case 'EXTR_IF_EXISTS' || 6:
               if (window[i] !== undefined) {
                   window[i] = arr[i];
               }
               break;
            case 'EXTR_PREFIX_IF_EXISTS' || 5:
               if (window[i] !== undefined) {
                   window[prefix+'_'+i] = arr[i];
               }
               break;
            case 'EXTR_REFS' || 256:
               throw 'The EXTR_REFS type will not work in JavaScript';
               break;
            case 'EXTR_OVERWRITE' || 0:
                // Fall-through
            default:
                window[i] = arr[i];
                break;
          }
    }
}</code></pre>
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<strong>
Karol Kowalski
</strong>
on 2008-02-06 15:04:39 <br />
This version is not recursive as it should be acc to the php manual. Try run following example (taken from the manual, too):

<pre><code>
var city  = &amp;quot;San Francisco&amp;quot;;
var state = &amp;quot;CA&amp;quot;;
var event = &amp;quot;SIGGRAPH&amp;quot;;

var location_vars = new Array(&amp;quot;city&amp;quot;, &amp;quot;state&amp;quot;);

var result = compact(&amp;quot;event&amp;quot;, &amp;quot;nothing_here&amp;quot;, &amp;quot;location_vars&amp;quot;);

console.log(result)
</code></pre>

What you get is an object with event property and location_vars property which is an Array. What should be returned is a 'flat' object with event, city and state properties (because location_vars) should be searched inside.
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