Javascript custom functions with string

Question

Today i was asked question in interview. when i call 'hello'.replicate(3) it should print 'hellohellohello'

please help if anyone has answer to this

// 'hello'.replicate(3)
//output > 'hellohellohello'


function replicate(num){
  for(i=0; i<3; i++){
    
  }
}

Show your effort? Also don't modify builtin object (string) behavior. — user202729
– user202729, Commented Jan 30, 2018 at 2:10
'helo' a string and attach function to it and get output. i never did this before and got stuck here — Jay
– Jay, Commented Jan 30, 2018 at 2:13

Andrew · Accepted Answer · 2018-01-30 02:21:08Z

2

A JavaScript string will inherit functions from its prototype, so you need to add the function to the string prototype. For example:

String.prototype.replicate = function (n) {
  var replicatedString = '';

  for (var i = 0; i < n; i++) {
    replicatedString += this;
  }

  return replicatedString;
};

Collectives™ on Stack Overflow

Javascript custom functions with string

1 Answer 1

Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related