phpjs/_octopress/source/functions/log10/index.markdown

php.js offers community built php functions in javascript

---
layout: page
title: "JavaScript log10 function"
comments: true
sharing: true
footer: true
alias:
- /functions/view/log10:465
- /functions/view/log10
- /functions/view/465
- /functions/log10:465
- /functions/465
---
<!-- Generated by Rakefile:build -->
A JavaScript equivalent of PHP's log10

{% codeblock math/log10.js lang:js https://raw.github.com/kvz/phpjs/master/functions/math/log10.js raw on github %}
function log10 (arg) {
  // From: http://phpjs.org/functions
  // +   original by: Philip Peterson
  // +   improved by: Onno Marsman
  // +   improved by: Tod Gentille
  // +   improved by: Brett Zamir (http://brett-zamir.me)
  // *     example 1: log10(10);
  // *     returns 1: 1
  // *     example 2: log10(1);
  // *     returns 2: 0
  return Math.log(arg) / 2.302585092994046; // Math.LN10
}
{% endcodeblock %}

 - [Raw function on GitHub](https://github.com/kvz/phpjs/blob/master/functions/math/log10.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/math/log10.js)

### Example 1
This code
{% codeblock lang:js example %}
log10(10);
{% endcodeblock %}

Should return
{% codeblock lang:js returns %}
1
{% endcodeblock %}

### Example 2
This code
{% codeblock lang:js example %}
log10(1);
{% endcodeblock %}

Should return
{% codeblock lang:js returns %}
0
{% endcodeblock %}


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