Nodejs Float Format toFixedDown(digits)

Method Source Code

Number.prototype.toFixedDown = function(digits) {
  var re = new RegExp('(\\d+\\.\\d{' + digits + '})(\\d)'),
      m = this.toString().match(re);
  return m ? parseFloat(m[1]) : this.valueOf();
};

Related

1. 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);
   ...
   

2. 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 += ".";
   ...
   

3. toFixed10(precision)

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

4. toFixedBtoFixed ( precision )

   Number.prototype.toFixedB = function toFixed ( precision ) {
       var multiplier = Math.pow( 10, precision + 1 ),
           wholeNumber = Math.floor( this * multiplier );
       return (Math.round( wholeNumber / 10 ) * 10 / multiplier).toFixed(precision);
   

5. toFixedDown(digits)

   Number.prototype.toFixedDown = function(digits) {
       var n = this - Math.pow(10, -digits)/2;
       n += n / Math.pow(2, 53); 
       return n.toFixed(digits);
   

6. toFixedtoFixed

   function toFixed(num){
     var divisor = parseInt(1 + "0".repeat(num));
     return Math.round(this*divisor)/divisor
   Number.prototype.toFixed = toFixed
   

7. toFloorFixed(accuracy)

   Number.prototype.toFloorFixed = function (accuracy) {
     var k = Math.pow(10, accuracy)
     return (Math.floor(this * k) / k).toString()
   Date.prototype.toInternetTime = function (accuracy) {
     const BeatInSeconds = 86.4
     const utcHours = this.getUTCHours()
     const hours = utcHours !== 23 ? utcHours + 1 : 0
     const BielMeanTime = this.getUTCSeconds() + this.getUTCMinutes() * 60 + hours * 3600
   ...
   

8. toNumFixed(num)

   Number.prototype.toNumFixed = function (num) {
     return parseFloat(this.toFixed(num));
   

9. splitThousands()

   Number.prototype.splitThousands = function () {
       var s = this.toString();
       var thousands = Math.floor(this / 1000).toString();
       return this > 999 ? ("{0} {1}").format(thousands, s.slice(thousands.length, s.length)) : s;
   };