Nodejs Int Parse toInt(fallBack)

Method Source Code

String.prototype.toInt = function (fallBack) {
    fallBack = fallBack || 0;//w  w  w  .  jav a2 s . c  om
    var str = this;
    if(!str){
        return fallBack;
    }
    var strAsInt = parseInt(str);
    if(isNaN(strAsInt)){
        return fallBack;
    } else {
        return strAsInt;
    }
}

Related

1. toInt()

   String.prototype.toInt = function(){
     return parseInt(this);
   };
   

2. toInt()

   String.prototype.toInt = function() {
     return parseInt(this, 10);
   };
   

3. toInt()

   String.prototype.toInt = function() {
     return parseInt(this);
   

4. toInt()

   const string = '10.5';
   String.prototype.toInt = () => parseInt(string);
   String.prototype.toFloat = () => parseFloat(string);
   const convert = string.toInt();
   const convertToFloat = string.toFloat();
   console.log('------------------------------------------');
   console.log('result chaining:');
   console.log('------------------------------------------');
   console.log('string.toInt()\n', convert);
   ...
   

5. toInt()

   String.prototype.toInt = function(){
       var str = this;
       str = str.toLowerCase();
       str = str.replace(/ /g, "");
       str = str.replace(/?/g, "");
       return parseInt(str);
   

6. toIntZero()

   String.prototype.toIntZero = function(){
     var val = parseInt(this);
     if(isNaN(val)){
       return 0;
     }else{
       return val
   };
   

7. toInteger()

   String.prototype.toInteger=function(){
     var s,x;
     if(s=/(^[+-]?)(0b[01]+$)/.exec(this)) {
       x=Number(s[2]);
       return s[1]!='-'?x:-x;
     } else if(s=/(^[+-]?)(0o[0-7]+$)/.exec(this)) {
       x=Number(s[2]);
       return s[1]!='-'?x:-x;
     } else if(s=/(^[+-]?)(0x[0-9a-fA-F]+$)/.exec(this)) {
   ...