Re-dimensioning javascript arrays (i.e 1x6 => 2x3)

Question

Is it possible to use a higher order javascript function to resize single dimension array into a multi-dimensional array (i.e. 1x6 to 2x3) or do i have to work around with for loops?

Do you have any code examples to resize [0,1,2,3,4,5] to [[0,1,2],[3,4,5]]?

There doesn't seem to be any function that could resize an array the way you want. You need to to that with loops, I could write an example code that contains loops if you want. — Ümit Aparı, Oct 06 '18 at 16:36

score 1 · Accepted Answer · answered Oct 06 '18 at 16:40

1

For a real 2D array, you could flat it and take the values with a generator by using new arrays' mapping.

function resize(array, i, j) {
    var gen = array.reduce((a, b) => a.concat(b))[Symbol.iterator]();
    
    return Array.from({ length: i }, _ => Array.from({ length: j }, _ => gen.next().value));
}

console.log(resize([[0, 1, 2, 3, 4, 5]], 2, 3));

answered Oct 06 '18 at 16:40

Nina Scholz

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Cheers Nina!!! It works really really well. Thankyou sooo much – jumper384 Oct 07 '18 at 03:13

score -1 · Answer 2 · answered Oct 06 '18 at 16:53

-1

Using Ramda https://ramdajs.com/docs/#splitEvery

R.splitEvery(3, [0,1,2,3,4,5]); //=> [[0,1,2],[3,4,5]]

answered Oct 06 '18 at 16:53

Anthony Raimondo

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How does this not answer the question? – Anthony Raimondo Oct 06 '18 at 16:57
Possibly because it is not showing any code but is relying on a library to perform something trivial. I did not vote down but I can see why – mplungjan Oct 06 '18 at 17:04
@mplugjan makes sense, but that Nina Scholz answer is clearly non-trivial lol – Anthony Raimondo Oct 06 '18 at 17:08
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That is because it is Nina. Is this better: `var i,j,temparray,chunk = 3; for (i=0,j=array.length; i – mplungjan Oct 06 '18 at 17:17
@mplungjan, "*That is because it is Nina.*" do i miss something? – Nina Scholz Oct 06 '18 at 17:26
1

You always post highly effective but impossible for any noob to decipher- because you can. More power to you. The code from the dupe I posted in the comment above is much easier to read and does the same. – mplungjan Oct 06 '18 at 17:32

Re-dimensioning javascript arrays (i.e 1x6 => 2x3)

2 Answers2