Nodejs Float Round roundToPrec(precision)

Method Source Code

// roundToPrec is different from toFixed as it returns a Number
// instead of a String thus removing trailing zeros int the fractional part...
Number.prototype.roundToPrec = function(precision)
{
    var power = Math.pow(10, precision || 0);
    return Math.round(this * power) / power;
}

Related

1. roundMoney(decimals = 2)

   Number.prototype.roundMoney = Number.prototype.toObject || function roundMoney(decimals = 2) {
     return Number((Math.round(this + "e" + decimals) + "e-" + decimals));
   };
   

2. roundNumber.prototype.round || (precision)

   Number.prototype.round = Number.prototype.round || function (precision) {
     return Math.round(this * Math.pow(10, (precision || 2))) / Math.pow(10, (precision || 2))
   

3. roundTo()

   Number.prototype.roundTo = function() {
       return 32 * Math.round(this / 32);
   

4. roundTo(num)

   Number.prototype.roundTo = function(num) {
     var resto = this%num;
     if (resto <= (num/2)) {
       return this-resto;
     } else {
       return this+num-resto;
   };
   

5. roundToFixed(radix)

   Number.prototype.roundToFixed = function (radix) {
       var val = this;
       radix = radix || 0;
       val *= Math.pow(10, radix);
       val = Math.round(val);
       val /= Math.pow(10, radix);
       return val;
   };
   

6. roundToTwoDPoints()

   Number.prototype.roundToTwoDPoints = function() {
     if (isNaN(this)) {
       console.log(this);
       console.dir(this);
       throw new Error('Not a number!');
     return Math.round((this + 0.00001) * 100) / 100;
   };
   

7. ceil()

   Number.prototype.ceil = function(){
       return Math.ceil(this);
   };
   

8. ceilMagnitude()

   Number.prototype.ceilMagnitude = function(){
     if (this > 1) {
       var magnitude = Math.pow(10, (this.toString().length - 1));
       return Math.ceil(this / magnitude) * magnitude;
     } else {
       return 1;
   };
   var objectLength = function objectLength(object) {
   ...
   

9. floor()

   Number.prototype.floor = function(){
       return Math.floor(this);
   };