phpjs/_octopress/source/functions/array_sum/index.markdown

php.js offers community built php functions in javascript

---
layout: page
title: "JavaScript array_sum function"
comments: true
sharing: true
footer: true
alias:
- /functions/view/array_sum:339
- /functions/view/array_sum
- /functions/view/339
- /functions/array_sum:339
- /functions/339
---
<!-- Generated by Rakefile:build -->
A JavaScript equivalent of PHP's array_sum

{% codeblock array/array_sum.js lang:js https://raw.github.com/kvz/phpjs/master/functions/array/array_sum.js raw on github %}
function array_sum (array) {
  // From: http://phpjs.org/functions
  // +   original by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
  // +   bugfixed by: Nate
  // +   bugfixed by: Gilbert
  // +   improved by: David Pilia (http://www.beteck.it/)
  // +   improved by: Brett Zamir (http://brett-zamir.me)
  // *     example 1: array_sum([4, 9, 182.6]);
  // *     returns 1: 195.6
  // *     example 2: total = []; index = 0.1; for (y=0; y < 12; y++){total[y] = y + index;}
  // *     example 2: array_sum(total);
  // *     returns 2: 67.2
  var key, sum = 0;

  if (array && typeof array === 'object' && array.change_key_case) { // Duck-type check for our own array()-created PHPJS_Array
    return array.sum.apply(array, Array.prototype.slice.call(arguments, 0));
  }

  // input sanitation
  if (typeof array !== 'object') {
    return null;
  }

  for (key in array) {
    if (!isNaN(parseFloat(array[key]))) {
      sum += parseFloat(array[key]);
    }
  }

  return sum;
}
{% endcodeblock %}

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

### Example 1
This code
{% codeblock lang:js example %}
array_sum([4, 9, 182.6]);
{% endcodeblock %}

Should return
{% codeblock lang:js returns %}
195.6
{% endcodeblock %}

### Example 2
This code
{% codeblock lang:js example %}
total = []; index = 0.1; for (y=0; y < 12; y++){total[y] = y + index;}
array_sum(total);
{% endcodeblock %}

Should return
{% codeblock lang:js returns %}
67.2
{% endcodeblock %}


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