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Javascript - Manipulating currency for display and computation

/ Published in: JavaScript
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Used to easily display or compute for prices e.g shopping cart.

Thousands separator regex based on Paul Creasey.

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  1. jQuery(document).ready(function($) {
  2.  
  3.    $.currency = {
  4.  
  5.        displayFormat: function(amount)
  6.        {
  7.            amount = $.currency.convert_to_decimal(amount);
  8.            amount = $.currency.add_thousands_separator(amount);
  9.  
  10.            return amount;
  11.        },
  12.  
  13.        computeFormat: function(amount)
  14.        {
  15.            amount = $.currency.remove_thousands_separator(amount);
  16.            amount = $.currency.convert_to_decimal(amount);
  17.  
  18.            return amount;
  19.        },
  20.  
  21.        add_thousands_separator: function(amount)
  22.        {
  23.             amount = String(amount);
  24.             amount = amount.replace(/(\d)(?=(\d\d\d)+(?!\d))/g, "$1,");
  25.  
  26.             return amount;
  27.        },
  28.  
  29.        remove_thousands_separator: function(amount)
  30.        {
  31.            amount = String(amount);
  32.            amount = amount.replace(/\,/g, "");
  33.  
  34.            return amount;
  35.        },
  36.  
  37.        convert_to_decimal: function(amount)
  38.        {
  39.            amount = Number(amount).toFixed(2);
  40.  
  41.            return amount;
  42.        }
  43.    };
  44. });

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