Set String via String.prototype function without return

Question

I have the following function to add splice to a string:

String.prototype.splice = function(index, howManyToDelete, stringToInsert) {
    var ch         


        

Answer 1

You can't do that. You can't change the value of a string in the way that you change the content of an array.

Look at the other string methods, and how they return the new string value rather than changing the string in place.