Loading string to array of array

Question

I am getting a set of arrays in string format which looks like

[49,16,135],[51,16,140],[50,18,150]

Now I need to save them in an array of arrays. I tried it like

let array = [];
let str = '[49,16,135],[51,16,140],[50,18,150]';
array = str.split('[]');
    
console.log(array);

but it is creating only one array including all string as an element while I need to have

array = [[49,16,135],[51,16,140],[50,18,150]]

It's returning one string because the substring [] does not appear in the str — Taplar
– Taplar, Commented Feb 9, 2019 at 6:21

CertainPerformance · Accepted Answer · 2019-02-09 06:21:01Z

4

Add array delimiters to each end of the string, then use JSON.parse:

const str = '[49,16,135],[51,16,140],[50,18,150]';
const json = '[' + str + ']';
const array = JSON.parse(json);
console.log(array);

answered Feb 9, 2019 at 6:21

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1 Comment

you were faster! :D

Dhananjai Pai · Accepted Answer · 2019-02-09 06:26:28Z

2

You are splitting it incorrectly, in the example, it will only split of there is a [] in the string

You can create a valid JSON syntax and parse it instead like so,

let str = '[49,16,135],[51,16,140],[50,18,150]';
let array = JSON.parse(`[${str}]`);

console.log(array);

answered Feb 9, 2019 at 6:22

Dhananjai Pai

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Yeah @Taplar I copied the snippet from question for faster response, Will edit.

Nick Parsons · Accepted Answer · 2019-02-09 06:48:15Z

0

Another way you could achieve this is by using a Function constructor. This method allows you to "loosely" pass your array.

const strArr = "[49,16,135],[51,16,140],[50,18,150]",
arr = Function(`return [${strArr}]`)();

console.log(arr);

answered Feb 9, 2019 at 6:48

Nick Parsons

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