Simple PHP style number formatting - Node.js Number

Node.js examples for Number:Format

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Description

Simple PHP style number formatting

Demo Code


  /**//from w w  w.  j ava2s .  co m
   * Simple PHP style number formatting
   *
   * Does not round
   *
   * @see    http://php.net/number_format
   * @param  {Number} precision Number of digits to display after the decimal, default 0
   * @param  {String} decimal   Character to use as the decimal, default '.'
   * @param  {String} separator Character to use as the thousands separator, default ','
   * @return {String}           The formatted string
   */
  Number.prototype.format = function(precision, decimal, separator) {
    if (!precision) {precision = 0;}
    if (!decimal)   {decimal   = '.';}
    if (!separator) {separator = ',';}

    var string_this = String(this);
    var x = string_this.split('.');
    var formatted_number = x[0];
    var remainder = x.length > 1 ? x[1] : '0';
    var regex = /(\d+)(\d{3})/;

    while (regex.test(formatted_number)) {
      formatted_number = formatted_number.replace(regex, '$1'+separator+'$2');
    }

    if (precision > 0) {
      formatted_number += decimal;
      for (var a = 0; a < precision; a++) {
        if (remainder[a]) {
          formatted_number += remainder[a];
        } else {
          formatted_number += '0';
        }
      }
    }

    return formatted_number;
  };
}();

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