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

Method Source Code

/**//from ww  w.j av  a2 s.  c  o m
 * Number.prototype.format(n, x, s, c)
 *
 * @param n integer: length of decimal
 * @param x integer: length of whole part
 * @param s mixed: sections delimiter
 * @param c mixed: decimal delimiter
 */
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 || ','));
};

Related

1. 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 || ','));
   };
   

2. 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 || ','));
   };
   

3. 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 || ','));
   };
   

4. 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 || ','));
   };
   

5. 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;
   

6. formatNumber()

   Number.prototype.formatNumber = function() {
     var a = Math.abs(this).toString().split('');
     v = '';
     var n = 0;
     while (a.length > 0) {
       if (n>0 && n%3 == 0)
         v = '.' + v;
       v = a.pop() + v;
       n ++;
   ...
   

7. formatNumber(c, d, t)

   Number.prototype.formatNumber = function(c, d, t){
     var n = this,
         c = isNaN(c = Math.abs(c)) ? 2 : c,
         d = d == undefined ? "." : d,
         t = t == undefined ? "," : t,
         s = n < 0 ? "-" : "",
         i = parseInt(n = Math.abs(+n || 0).toFixed(c)) + "",
         j = (j = i.length) > 3 ? j % 3 : 0;
        return s + (j ? i.substr(0, j) + t : "") + i.substr(j).replace(/(\d{3})(?=\d)/g, "$1" + t) + (c ? d + Math.abs(n - i).toFixed(c).slice(2) : "");
   ...
   

8. formatNumber(c, d, t)

   Number.prototype.formatNumber = function(c, d, t) {
       var n = this, c = isNaN(c = Math.abs(c)) ? 2 : c, 
       d = d == undefined ? "," : d, 
       t = t == undefined ? "." : t, 
       s = n < 0 ? "-" : "", 
       i = parseInt(n = Math.abs(+n || 0).toFixed(c)) + "", 
       j = (j = i.length) > 3 ? j % 3 : 0;
       return s + (j ? i.substr(0, j) + t : "") + i.substr(j).replace(/(\d{3})(?=\d)/g, "$1" + t) + (c ? d + Math.abs(n - i).toFixed(c).slice(2) : "");
   

9. format(thousandSep, decPoint)

   Number.THOUSAND_STEP = ",";
   Number.DECIMAL_POINT = ".";
   Number.prototype.format = function(thousandSep, decPoint) {
     var decimal, str;
     thousandSep = thousandSep || Number.THOUSAND_STEP;
     decPoint = decPoint || Number.DECIMAL_POINT;
     decimal = this.toString().split(".");
     str = Math.abs(this)
       .toFixed(0)
   ...