How to implement String.prototype.repeat? | String Polyfills | Frontend Problem Solving | JavaScript Interview Question

In this question, the candidate needs to implement a function customRepeat that mimics the behaviour of String.prototype.repeat method.

More about Array.prototype.repeat

The repeat() method constructs and returns a new string which contains the specified number of copies of the string on which it was called, concatenated together.

Syntax

customRepeat(count);

Parameters

• count

An integer between 0 and +Infinity, indicating the number of times to repeat the string.

Return value

A new string containing the specified number of copies of the given string.

Exceptions

RangeError

Thrown if count is negative or if count overflows maximum string length (Infinity).

Examples

const mood = 'Happy! ';

console.log(`I feel ${mood.customRepeat(3)}`);
// prints: "I feel Happy! Happy! Happy! "

Submission

Start the timer, complete your solution, pass all the test cases and submit it. Ideally, you should finish this question within 30 mins.

Share your solution with us on twitter or linkedin