Nodejs String Sub String from Left left(cnt)

Method Source Code

if(!String.prototype.left){
   String.prototype.left = function(cnt){
      return this.substr(0,cnt);
   };//w w w. ja v  a 2 s.c o m
}

if(!String.prototype.right){
   String.prototype.right = function(cnt){
      return this.substr(this.length - cnt,this.length);
   };
}

Related

1. left(count)

   String.prototype.left = function(count) {
       if (count >= this.length) {
           return this.toString();
       }else {
           return this.slice(0, count);
   };
   

2. left(count)

   String.prototype.left = function (count) {
       return this.substring(0, count);
   

3. left(count)

   String.prototype.left = function(count) {
       var result = "";
       var stringLength = this.length;
       if (count > stringLength) {
           count = stringLength;
       var i;
       for (i = 0; i < count; i += 1) {
           result += this[i];
   ...
   

4. left(count)

   String.prototype.left = function(count) {
       if (count > this.length) return this.toString();
       return this.substring(0, count);
   };