Nodejs Utililty Methods Int Parse

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

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

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

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);
...

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

String.prototype.toInt = function (fallBack) {
    fallBack = fallBack || 0;
    var str = this;
    if(!str){
        return fallBack;
    var strAsInt = parseInt(str);
    if(isNaN(strAsInt)){
        return fallBack;
...

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

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)) {
...