How do I make each each element in array another array?

Question

I have some text that I receive from the user:

var text = ['Hello', 'World']; // this is the product of string.split(',')

I need to convert it into an array like this one:

var argument = [['Hello'], ['World']];

I need the input in this format so I can send multiple values to the db.

How can I do this elegantly?

Checkout [`map`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/map) — Jason Cust, May 05 '15 at 15:00
Please see #ninjagecko `Array.prototype.chunk` answer [here](http://stackoverflow.com/a/10456644/2365792). To use on your `text` array, do it like `var argument = text.chunk(text.length);` — Tim Rijavec, May 05 '15 at 15:02
possible duplicate of [Split array into chunks](http://stackoverflow.com/questions/8495687/split-array-into-chunks) — Tim Rijavec, May 05 '15 at 15:03

score 3 · Accepted Answer · answered May 05 '15 at 15:00

3

I can't think of anything more elegant for this than map:

E.g.:

var argument = originalString.split(",").map(function(entry) {
    return [entry];
});

Or if you've enabled ES6 on your NodeJS installation:

var argument = originalString.split(",").map((entry) => [entry]);

answered May 05 '15 at 15:00

T.J. Crowder

Perfect. How do I enable ES6 in Node? Are arrow functions supported yet? – Angular noob May 05 '15 at 15:38
@Angularnoob: Ah, looks like they aren't *quite* yet: https://github.com/joyent/node/wiki/ES6-%28a.k.a.-Harmony%29-Features-Implemented-in-V8-and-Available-in-Node (right at the bottom, but I figured the page as a whole was useful to you). – T.J. Crowder May 05 '15 at 15:54
@That is too bad, man. I am not much of a JS coder (evidently,) but it seems like ES 6 has been imminent for **ages**! – Angular noob May 05 '15 at 16:46
@Angularnoob: It's getting here. :-) About two years behind schedule, which isn't as bad as it could be as these things go... – T.J. Crowder May 05 '15 at 16:58

1 Answers1