Nodejs Float Round round(places)

Method Source Code

Number.prototype.round = function(places) {
    return +(Math.round(this + "e+" + places)  + "e-" + places);
}

function fractionToFloat(str)
{
    // Check for complex fraction
var complexParts = str.split(' ');

var result = 0;//from  w  ww .  j a  v  a  2 s . c  om
var f;

if (complexParts.length == 1) {
    f = complexParts[0];
}
else {
    result += parseInt(complexParts[0]);
    f = complexParts[1];
}

var parts = f.split('/');

if (parts.length == 1) {
    // No fractions
    return str;
}
else {
    result += parseInt(parts[0]) / parseInt(parts[1]);
}

return result;
}

Related

1. round()

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

2. round()

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

3. round(d)

   Number.prototype.round = function(d) {
     const string_number = String(this)
     const split_string = string_number.split('.')
     if (split_string.length === 1) return this
     const integer_chunk = split_string[0]
     if (!d) return integer_chunk
     const decimal_chunk = split_string[1]
     const determinig_digit = parseInt(decimal_chunk[d])
     if (determinig_digit < 5) {
   ...
   

4. round(decimals)return round(this,decimals);}

   exports.round = function(number,decimals){return round(number,decimals);}
   Number.prototype.round = function(decimals){return round(this,decimals);}
   var round = function(number,decimals){
     if(!isNaN(number)){
       var d = 1;
       if(!isNaN(decimals)){
         d = Math.pow(10,decimals)
       return Math.round(number * d)/d;
   ...
   

5. round(dp)

   Number.prototype.round = function(dp) {
       multiplier = Math.pow(10,dp);
       return Math.round(this*multiplier) / multiplier;
   

6. round(precision)

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

7. round(precision)

   Number.prototype.round = function(precision){
     if (Object.isUndefined(precision)){
       return Math.round(this);
     precision = Math.pow(10, precision);
     return Math.round(this * precision) / precision;
   };
   

8. round(precision)

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

9. round5()

   Number.prototype.round5 = function() {
     return ((this)- (this % 5));