Javascript String rev()

Description

Javascript String rev() 


var a = "aa";
String.prototype.rev = function(){
  console.log(this+"_rev_"+this.length);
};
console.log("a");
a.rev();// w  ww.j a v a 2 s.  c  o m

Javascript String rev() 

//Just like you can add methods to your own constructor, you can also add methods and properties to built in classes in JavaScript like Arrays and Objects.

//Add a reverse method to the String 'class' so that every instance of String can call reverse and reverse itself.
  
  //code here/*from w  w w  .  j a v  a 2 s.  c  o  m*/

String.prototype.rev = function() {
 return this.split("").reverse().join("");
};

var str = "class";

str.rev();

Javascript String rev() 

//Just like you can add methods to your own constructor, you can also add methods and properties to built in classes in JavaScript like Arrays and Objects.

//Add a reverse method to the String 'class' so that every instance of String can call reverse and reverse itself.
  
  //code here//  w  ww.  j a va  2 s  .c  o  m

String.prototype.rev = function() {
    var newStr = ''
    for (var i = this.length - 1; i >= 0; i--) {
        newStr += this[i];
    }
    console.log(newStr);
    return newStr;
}

var testStr = 'just like you can add';
testStr.rev();



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