Updating object value from prototype function

Question

I\'m trying to do this:

String.prototype.clear = function(){
    alert(this.value);
    this = \'\'; // I want to set value to \'\' here
}

var temp = \'Hell         


        

Answer 1

You can create a class called MyMutableString like:

function MyMutableString(s) {
   this.string = s;
   this.clear = function() {
      this.string = "";
   }
}

Now you create an instance and use it like like:

var s = new MyMutableString("my str");
s.clear(); // makes string stored inside object `s` empty
console.log(s.string);