Nodejs Float Format formatFloat(num, pos)

Method Source Code

function formatFloat(num, pos) {
   var size = Math.pow(10, pos);
   return Math.round(num * size) / size;
}

Related

1. toFix(digits)

   Number.prototype.toFix=function(digits){
       var f=parseInt(digits),
           n=Number(this),
           s=n.toString();
       var p=s.split(".");
       if(p[1]&&p[1].length>f){
           p[1]=p[1].substring(0,f);
           n=Number(p.join("."));
       }else{
   ...
   

2. toFixed(d)

   Number.prototype.toFixed = function (d) {
       var s = this + "";
       if (!d) d = 0;
       if (s.indexOf(".") == -1) s += ".";
       s += new Array(d + 1).join("0");
       if (new RegExp("^(-|\\+)?(\\d+(\\.\\d{0," + (d + 1) + "})?)\\d*$").test(s)) {
           var s = "0" + RegExp.$2, pm = RegExp.$1, a = RegExp.$3.length, b = true;
           if (a == d + 2) {
               a = s.match(/\d/g);
   ...
   

3. toFixed(exponent)

   Number.prototype.toFixed = function(exponent) {
       if (exponent) {
           var result = (parseInt(this * Math.pow(10, exponent) + 0.5) / Math.pow(10, exponent)).toString();
           var count = 0;
           if (result.indexOf(".") > 0) {
               count = exponent - result.split(".")[1].length;
           } else {
               count = exponent;
               result += ".";
   ...
   

4. toFixed10(precision)

   Number.prototype.toFixed10 = function(precision) {
       return Math.round10(this, -precision).toFixed(precision);