---
layout: page
title: "JavaScript range function"
comments: true
sharing: true
footer: true
alias:
- /functions/view/range:499
- /functions/view/range
- /functions/view/499
- /functions/range:499
- /functions/499
---
<!-- Generated by Rakefile:build -->
A JavaScript equivalent of PHP's range

{% codeblock array/range.js lang:js https://raw.github.com/kvz/phpjs/master/functions/array/range.js raw on github %}
function range (low, high, step) {
  // From: http://phpjs.org/functions
  // +   original by: Waldo Malqui Silva
  // *     example 1: range ( 0, 12 );
  // *     returns 1: [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12]
  // *     example 2: range( 0, 100, 10 );
  // *     returns 2: [0, 10, 20, 30, 40, 50, 60, 70, 80, 90, 100]
  // *     example 3: range( 'a', 'i' );
  // *     returns 3: ['a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i']
  // *     example 4: range( 'c', 'a' );
  // *     returns 4: ['c', 'b', 'a']
  var matrix = [];
  var inival, endval, plus;
  var walker = step || 1;
  var chars = false;

  if (!isNaN(low) && !isNaN(high)) {
    inival = low;
    endval = high;
  } else if (isNaN(low) && isNaN(high)) {
    chars = true;
    inival = low.charCodeAt(0);
    endval = high.charCodeAt(0);
  } else {
    inival = (isNaN(low) ? 0 : low);
    endval = (isNaN(high) ? 0 : high);
  }

  plus = ((inival > endval) ? false : true);
  if (plus) {
    while (inival <= endval) {
      matrix.push(((chars) ? String.fromCharCode(inival) : inival));
      inival += walker;
    }
  } else {
    while (inival >= endval) {
      matrix.push(((chars) ? String.fromCharCode(inival) : inival));
      inival -= walker;
    }
  }

  return matrix;
}
{% endcodeblock %}

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

### Example 1
This code
{% codeblock lang:js example %}
range ( 0, 12 );
{% endcodeblock %}

Should return
{% codeblock lang:js returns %}
[0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12]
{% endcodeblock %}

### Example 2
This code
{% codeblock lang:js example %}
range( 0, 100, 10 );
{% endcodeblock %}

Should return
{% codeblock lang:js returns %}
[0, 10, 20, 30, 40, 50, 60, 70, 80, 90, 100]
{% endcodeblock %}

### Example 3
This code
{% codeblock lang:js example %}
range( 'a', 'i' );
{% endcodeblock %}

Should return
{% codeblock lang:js returns %}
['a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i']
{% endcodeblock %}


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