Nodejs Number to Percentage Format toPercent(ofTotalAmount)

Method Source Code

Number.prototype.toPercent = function (ofTotalAmount) {

    "use strict";
    var n, t;//from   w w w  .ja  v  a2  s  .  c om
    var sign, suffix, i;
    n = this;

    try {

        // assume base of 100
        t = (typeof ofTotalAmount === 'undefined' || isNaN(ofTotalAmount)) ? 100 : ofTotalAmount;
        if (t === 0) throw "division exception averted";
        if (t <= n) throw "is too low";

        sign = (n < 0) ? '-' : '';
        suffix = '%';
        i = parseInt(n = Math.abs(n * t)) + '';

    } catch (err) {
        console.log("Error: " + err + ".");
    } finally {
         return sign + i + suffix;
    }

    return sign + i + suffix;
};

Related

1. toPercent(n)

   Number.prototype.toPercent = function(n) {
     n = n || 0;
     return (Math.round(this * Math.pow(10, n + 2)) / Math.pow(10, n)).toFixed(n) + '%';
   

2. toPercent(places)

   Number.prototype.toPercent = function(places) {
     return (this * 100).toFixed(places) + '%';
   };
   

3. toPercentage(radix)

   Number.prototype.toPercentage = function (radix) {
       var num = this * 100;
       return num.roundToFixed(radix);
   };