Nodejs Number Format format(n, x, s, c)

Method Source Code

/**//  ww w .ja va2s.  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"

Related

1. format(n, x)

   Number.prototype.format = function(n, x) {
     var re = '\\d(?=(\\d{' + (x || 3) + '})+' + (n > 0 ? '\\.' : '$') + ')';
     return this.toFixed(Math.max(0, ~~n)).replace(new RegExp(re, 'g'), '$&,');
   };
   

2. format(n, x)

   Number.prototype.format = function(n, x) {
       var re = '(\\d)(?=(\\d{' + (x || 3) + '})+' + (n > 0 ? '\\.' : '$') + ')';
       return this.toFixed(Math.max(0, ~~n)).replace(new RegExp(re, 'g'), '$1,');
   };
   

3. format(n, x)

   Number.prototype.format = function (n, x) {
       var re = '\\d(?=(\\d{' + (x || 3) + '})+' + (n > 0 ? '\\.' : '$') + ')';
       return this.toFixed(Math.max(0, ~~n));
   };
   

4. format(n, x, s, c)

   Number.isInteger = Number.isInteger || function(value) {
     return typeof value === 'number' && 
       isFinite(value) && 
       Math.floor(value) === value;
   };
   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 || ','));
   ...
   

5. format(n, x, s, c)

   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 || ','));
   };
   

6. format(n, x, s, c)

   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 || ','));
   };
   

7. format(n, x, s, c)

   Number.prototype.format = function(n, x, s, c) {
       if (arguments.length === 0) { n = 2; x = 3; s = ','; c = '.'; }
       var re = '\\d(?=(\\d{' + (x || 3) + '})+' + (n > 0 ? '\\D' : '$') + ')',
           num = this.toFixed(Math.max(0, Math.floor(n)));
       return (c ? num.replace('.', c) : num).replace(new RegExp(re, 'g'), '$&' + (s || ','));
   };
   

8. format(n, x, unit)

   Number.prototype.format = function(n, x, unit) {
       var re = '\\d(?=(\\d{' + (x || 3) + '})+' + (n > 0 ? '\\,' : '$') + ')';
       var concatunit = "";
       if (unit != null){ concatunit = " "+unit; }
       return this.toFixed(Math.max(0, ~~n)).replace(new RegExp(re, 'g'), '$&.')+concatunit;
   

9. formatNum(n, x, s, c)

   Number.prototype.formatNum = 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 || ','));
   };