Javascript Number format(n, x, s, c)

Introduction

Javascript Number format(n, x, s, c) 

/**/*  w  w  w  .j a  v a 2  s  .com*/
 * Number.prototype.format(n, x, s, c)
 *
 * @param integer n: length of decimal
 * @param integer x: length of whole part
 * @param mixed   s: sections delimiter
 * @param mixed   c: decimal delimiter
 */
Number.prototype.format = function(n, x, s, c) {
 var re = '\\d(?=(\\d{' + (x || 3) + '})+' + (n > 0 ? '\\D' : '$') + ')',
  num = this.toFixed(Math.max(0, ~~n));

 return (c ? num.replace('.', c) : num).replace(new RegExp(re, 'g'), '$&' + (s || ','));
};

Javascript Number format(n, x, s, c) 

/**/*from   www .j  ava  2  s. c om*/
 * Number.prototype.format(n, x, s, c)
 * 
 * @param integer n: length of decimal
 * @param integer x: length of whole part
 * @param mixed   s: sections delimiter
 * @param mixed   c: decimal delimiter
 */
Number.prototype.format = function(n, x, s, c) {
  var re = '\\d(?=(\\d{' + (x || 3) + '})+' + (n > 0 ? '\\D' : '$') + ')',
      num = this.toFixed(Math.max(0, ~~n));

  return (c ? num.replace('.', c) : num).replace(new RegExp(re, 'g'), '$&' + (s || ','));
};
// 12345678.9.format(2, 3, '.', ',');  // "12.345.678,90"
// 123456.789.format(4, 4, ' ', ':');  // "12 3456:7890"
// 12345678.9.format(0, 3, '-');       // "12-345-679"



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