Nodejs Number Format formatDecimal()

Method Source Code

Number.prototype.formatDecimal = function() {
   var nStr = this.toFixed(2);
   x = nStr.split('.');
   x1 = x[0];/*  w ww . java2 s. c o  m*/
   x2 = x.length > 1 ? '.' + x[1] : '';
   var rgx = /(\d+)(\d{3})/;
   while (rgx.test(x1)) {
      x1 = x1.replace(rgx, '$1' + ',' + '$2');
   }
   return x1 + x2;
};

Related

1. 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)
   ...
   

2. formatAmount(c, d, t)

   Number.prototype.formatAmount=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) : "");
   ...
   

3. formatBytes()

   Number.prototype.formatBytes = function() {
       var units = ['Bytes', 'KBytes', 'MBytes', 'GBytes'],
           bytes = this,
           i;
       for (i = 0; bytes >= 1024 && i < 3; i++) {
           bytes /= 1024;
       return bytes.toFixed(2) + ' ' + units[i];
   };
   ...
   

4. formatComma()

   Number.prototype.formatComma = function() {
     var n = this;
     var thouSeparator = thouSeparator == undefined ? "," : thouSeparator;
     var sign = n < 0 ? "-" : "";
     var i = parseInt(n = Math.abs(+n || 0)) + "";
     var j = (j = i.length) > 3 ? j % 3 : 0;
     return sign + (j ? i.substr(0, j) + thouSeparator : "") + i.substr(j).replace(/(\d{3})(?=\d)/g, "$1" + thouSeparator); 
   };
   

5. formatCustom(c, d, t)

   Number.prototype.formatCustom = 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 = String(parseInt(n = Math.abs(Number(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) : "");
   ...
   

6. formatHuman()

   Number.prototype.formatHuman = function() {
     var numStr   = '' + this;
     var numParts = numStr.split('.');
     var whole    = numParts[0];
     var decimal  = numParts[1] || '';
     var re = /(\d+)(\d{3})/;
     while (re.test(whole)) {
       whole = whole.replace(re, '$1' + ',' + '$2');
     return decimal.length === 0 ? whole : whole + '.' + decimal;
   };
   

7. formatformat(n, x)

   'use strict';
   Number.prototype.format = function format(n, x) {
     const re = `\\d(?=(\\d{${x || 3}})+${(n > 0 ? '\\.' : '$')})`;
     return this.toFixed(Math.max(0, ~~n)).replace(new RegExp(re, 'g'), '$&,');
   };
   String.prototype.rpad = function rpad(padString, length) {
     let str = this;
     while (str.length < length) {
       str = str + padString;
   ...
   

8. formatted()

   Number.prototype.formatted = function(){
     if (!this) return 0;
     var sign   = this < 0 ? '-' : '',
       num    = Math.floor(Math.abs(this)*100+0.50000000001),
       cents  = (num % 100).toString().substring(0, 2);
     num = Math.floor(num/100).toString();
     for (var i = 0, l = Math.floor((num.length-1)/3), p = 3; i < l; i++, p += 4){
       num = num.substring(0, num.length - p) + ' ' + num.substring(num.length - p);
     return sign + num + '.' + (cents < 10 ? '0' + cents : cents);
   };
   

9. toSize()

   Object.defineProperty( Number.prototype, "toSize", {
       "get": function() {
           return function( bitsNotBytes ) {
               var sizes = ['', ' Kb', ' Mb', ' Gb', ' Tb', ' Pb' ];
               var unit  = 0, remain = Math.abs( this * 1 );
               if ( bitsNotBytes )
                   remain *= 8;
               while ( remain >= 1024 && unit<5 )
                   remain /= 1024, unit++;
   ...