Proposal: `Array.prototype.chunks` and `Array.prototype.windows`

Cyril Auburtin cyril.auburtin at gmail.com
Tue Jul 9 15:16:06 UTC 2019


Nice,
https://github.com/tc39/proposal-slice-notation/issues/19#issuecomment-421453934
is
really awesome. I hope this idea doesn't get abandoned

I feel you can swap things easily already;
```js
let x = 1, y = 2;
[x, y] = [y, x];
```

Chunks could be written
```js
// take chunks of 4 from arr
// with slice+range operator proposal
const chunks = [0:Math.ceil(arr.length/4)].map(i => arr[4*i:4*(i+1)])
// vs
const chunks = Array.from({length: Math.ceil(arr.length/4)}, (_,i) =>
arr.slice(4*i, 4*(i+1)))
```


On Tue, May 28, 2019 at 12:05 PM Joseph Rocca <rocca.joseph at gmail.com>
wrote:

> Apologies if this has already been suggested and discussed somewhere, but
> I couldn't find anything. I'm learning Rust at the moment, and found myself
> wishing that JavaScript had `chunks` and `windows` array methods.
>
> https://doc.rust-lang.org/std/primitive.slice.html#method.windows
>
> https://doc.rust-lang.org/std/primitive.slice.html#method.chunks
>
> A `swap` method (like Rust's) might be handy too. Has there been any
> discussion on new array methods like this? I think it's great that slice
> notation and range() type stuff
> <https://github.com/tc39/proposal-slice-notation/issues/19#issuecomment-421453934> is
> being discussed, and I think it would be neat if JavaScript got some more
> array-manipulation features to make wrangling data more pleasant.
>
> Any thoughts?
>
> Cheers,
> Joe
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