javascript exercise - recursive function with a string

Question

console.log( ‘blah’.repeatMe( 3 ) );

Using Javascript write the code that would make the previous function print:

Output: blahblahblah

What have you tried? What did not work? Can you do it without the syntactic sugar of attaching the method to strings directly? — Thilo
– Thilo, Commented Mar 19, 2015 at 0:10
Sounds like homework to me. What have you tried? Where did you get stuck? Can you ask a more specific question about a piece of the solution rather than just ask us to write the code for you? — jfriend00
– jfriend00, Commented Mar 19, 2015 at 0:10
Hey guys, this was an exercise I saw into a test. I ask how to solve it in order to find anyone who is interested in just shows up this solution for fun. — Veka0881
– Veka0881, Commented Mar 19, 2015 at 14:19

Lye Fish · Accepted Answer · 2015-03-19 00:29:07Z

1

Oh, it's too fun to pass up a functional style solution.

String.prototype.repeatMe = function(n) {
    if (n <= 0) return "";
    if (n%2 === 1) return (""+this) + this.repeatMe(n-1);

    var half = this.repeatMe(n/2);
    return half + half;
}

document.body.innerHTML = "tester".repeat(10)

I'll let you work out what's happening as an exercise.

answered Mar 19, 2015 at 0:29

Lye Fish

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1 Comment

Veka0881 Over a year ago

Thank you very much Lye. It's very fun to analize your solution.

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