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

php.js offers community built php functions in javascript

---
layout: page
title: "JavaScript bccomp function"
comments: true
sharing: true
footer: true
alias:
- /functions/view/bccomp:877
- /functions/view/bccomp
- /functions/view/877
- /functions/bccomp:877
- /functions/877
---
<!-- Generated by Rakefile:build -->
A JavaScript equivalent of PHP's bccomp

{% codeblock bc/bccomp.js lang:js https://raw.github.com/kvz/phpjs/master/functions/bc/bccomp.js raw on github %}
function bccomp (left_operand, right_operand, scale) {
  // From: http://phpjs.org/functions
  // +   original by: lmeyrick (https://sourceforge.net/projects/bcmath-js/)
  // -    depends on: _phpjs_shared_bc
  // *     example 1: bccomp(1, 2);
  // *     returns 1: 3
  //  @todo: implement these testcases
  //        bcscale(0);
  //
  //        bcmath.test.result('bccomp', 1, -1, bccomp('-1','5', 4));
  //        bcmath.test.result('bccomp', 2, -1, bccomp('1928372132132819737213', '8728932001983192837219398127471'));
  //        bcmath.test.result('bccomp', 3,  0, bccomp('1.00000000000000000001', '1', 2));
  //        bcmath.test.result('bccomp', 4,  1, bccomp('97321', '2321'));
  var libbcmath = this._phpjs_shared_bc();

  var first, second; //bc_num
  if (typeof scale === 'undefined') {
    scale = libbcmath.scale;
  }
  scale = ((scale < 0) ? 0 : scale);

  first = libbcmath.bc_init_num();
  second = libbcmath.bc_init_num();

  first = libbcmath.bc_str2num(left_operand.toString(), scale); // note bc_ not php_str2num
  second = libbcmath.bc_str2num(right_operand.toString(), scale); // note bc_ not php_str2num
  return libbcmath.bc_compare(first, second, scale);
}
{% endcodeblock %}

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

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

Should return
{% codeblock lang:js returns %}
3
{% endcodeblock %}


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