Nodejs String to Number Convert toNumber()

Method Source Code

/**//from   w  w w .  j av  a 2  s.co m
@Name: String.prototype.toNumber
@Author: Paul Visco
@Version: 1.0 11/19/07
@Description: Converts a numeric string into an integer or float
@Return: Float If the original value has a decimal in it, a float is returned
@Return: Number If the original value is an interger, an integer value is returned
@Example:
var myString = '12';
var num = myString.toNumber() +2;
//num = 14 //without running toNumber it would return '122'

var myString = '12.4';
var num = myString.toNumber() +2;
//num = 14.4 //without running toNumber it would return '12.42'
*/
String.prototype.toNumber = function(){
   if(this.match(/\./)){
      return parseFloat(this, 10);
   } else {
      return parseInt(this, 10);
   }
};

Related

1. toNum()

   String.prototype.toNum = function() {
      if (this.length === 0) return 0;
      return parseInt(this);
   

2. toNumber()

   String.prototype.toNumber = function() {
       return parseInt(this);
   };
   var ten = "10";
   var fifty = "50";
   console.log(ten.toNumber()); 
   console.log(fifty.toNumber()); 
   

3. toNumber()

   String.prototype.toNumber = function() {
     return parseFloat(this);
   };
   

4. toNumber()

   String.prototype.toNumber = function(){
     return +this;
   };
   

5. toNumber()

   String.prototype.toNumber = function(){
     var str = this.gsub(",", ".");
     if (str.length == 0)
       return 0;
     var parts = str.split(".");
     if (parts.length > 1){               
       var res = '';
       for(var i=0; i<parts.length-1; i++){
         res = res + parts[i];
   ...
   

6. toNumber()

   String.prototype.toNumber = function() {
       return Number(this);
   

7. toNumber()

   String.prototype.toNumber = function()
     var res = 0;
     for(var i = this.length - 1; i >= 0; --i) {
       res += res * 256 + this.charCodeAt( i );
     return res;