Question

16

rated 0 times [ 17] [ 1] / answers: 1 / hits: 40598 / 8 Years ago, wed, may 18, 2016, 12:00:00

Say I have a number 18, instead of an array, in hand.

What is the best way to create a functional loop in JS given a number X instead of array of X elements?

I can do this:

[1,2,3].forEach(function(){



));

but if I have the number 3

I can do

for(var i = 0; i < 3; i++){



}

but I want that loop to be functional instead

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answered 8 Years ago rey · Accepted Answer

I don't understand why you want to do this. An equivalent to:

[1,2,3].forEach(function(){ ... ));

Is

var limit = n;

while (--limit) {(  // Note: 0 is falsy

    function(){ ... }

)(limit);}

Or if you really want to use an array structure, the following will do:

new Array(limit).fill(0).forEach(function(){...});