---
layout: page
title: "JavaScript compact function"
comments: true
sharing: true
footer: true
alias:
- /functions/view/compact:371
- /functions/view/compact
- /functions/view/371
- /functions/compact:371
- /functions/371
---
<!-- Generated by Rakefile:build -->
A JavaScript equivalent of PHP's compact

{% codeblock array/compact.js lang:js https://raw.github.com/kvz/phpjs/master/functions/array/compact.js raw on github %}
function compact () {
  // From: http://phpjs.org/functions
  // +   original by: Waldo Malqui Silva
  // +    tweaked by: Jack
  // +      input by: Brett Zamir (http://brett-zamir.me)
  // +   bugfixed by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
  // *     example 1: var1 = 'Kevin'; var2 = 'van'; var3 = 'Zonneveld';
  // *     example 1: compact('var1', 'var2', 'var3');
  // *     returns 1: {'var1': 'Kevin', 'var2': 'van', 'var3': 'Zonneveld'}
  var matrix = {},
    that = this;

  var process = function (value) {
    var i = 0,
      l = value.length,
      key_value = '';
    for (i = 0; i < l; i++) {
      key_value = value[i];
      if (Object.prototype.toString.call(key_value) === '[object Array]') {
        process(key_value);
      } else {
        if (typeof that.window[key_value] !== 'undefined') {
          matrix[key_value] = that.window[key_value];
        }
      }
    }
    return true;
  };

  process(arguments);
  return matrix;
}
{% endcodeblock %}

 - [Raw function on GitHub](https://github.com/kvz/phpjs/blob/master/functions/array/compact.js)

Please note that php.js uses JavaScript objects as substitutes for PHP arrays, they are 
the closest match to this hashtable-like data structure. 

Please also note that php.js offers community built functions and goes by the 
[McDonald's Theory](https://medium.com/what-i-learned-building/9216e1c9da7d). We'll put online 
functions that are far from perfect, in the hopes to spark better contributions. 
Do you have one? Then please just: 

 - [Edit on GitHub](https://github.com/kvz/phpjs/edit/master/functions/array/compact.js)

### Example 1
This code
{% codeblock lang:js example %}
var1 = 'Kevin'; var2 = 'van'; var3 = 'Zonneveld';
compact('var1', 'var2', 'var3');
{% endcodeblock %}

Should return
{% codeblock lang:js returns %}
{'var1': 'Kevin', 'var2': 'van', 'var3': 'Zonneveld'}
{% endcodeblock %}


### Other PHP functions in the array extension
{% render_partial _includes/custom/array.html %}