Javascript string to multidimensional array of numbers

Question

Ive been reading semilar questions and answers trying to get a solution to this, im working on maps and getting strings that I have to convert to arrays... I got an string that's given to me as variable that I have access on it as string:

coords = '[42.46329472141537,21.46498522471254],[42.463191829327116,21.4654574564449],[42.463524249310545,21.465586246917347],[42.463642970305486,21.465092550106277]';

I need this variable to be an array, I tried JSON.parse it's throwing me an error, I tried to map(Number) that's not defined and Ive tried to split, it's deforming my array... As result I need the array to be in this format:

var newCoords = Array(Array([42.46329472141537,21.46498522471254]),Array([42.463191829327116,21.4654574564449]),Array([42.463524249310545,21.465586246917347]),Array([42.463642970305486,21.465092550106277]));

Every advice will be helpful.

No, it is just string concatenation, is the same thing as JSON.parse("[" + coords + "]"); and this just wraps the string in square brackets to have a valid JSON. — Titus
– Titus, Commented Nov 8, 2019 at 9:58
I didn't know about that, thank you very much, I was looking for a solution since 2 days... — Flamur Beqiraj
– Flamur Beqiraj, Commented Nov 8, 2019 at 10:00
Does this answer your question? Convert string to a multidimensional array — Heretic Monkey
– Heretic Monkey, Commented Oct 24, 2023 at 18:34

Mosè Raguzzini · Accepted Answer · 2019-11-08 10:14:43Z

2

To make it parsable you have to wrap the arrays in a parsable object (object property, another array and so on);

To wrap your string in another object you can take advantage of template literals:

Template literals are string literals allowing embedded expressions. You can use multi-line strings and string interpolation features with them. They were called "template strings" in prior editions of the ES2015 specification.

// Wrap arrays in another array to get a parsable object

const coords = '[42.46329472141537,21.46498522471254],[42.463191829327116,21.4654574564449],[42.463524249310545,21.465586246917347],[42.463642970305486,21.465092550106277]';

console.log(JSON.parse(`[${coords}]`));

edited Nov 8, 2019 at 10:14

answered Nov 8, 2019 at 10:02

Mosè Raguzzini

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2 Comments

Flamur Beqiraj Over a year ago

I allready got the answer on the commens, but you just changed the question it doesent have double brackeds at beginning of the string [[ it has arrays one after one on the string long...

Mosè Raguzzini Over a year ago

Just edited, I thought it was trivial but if you are not used to javascript look at my edit.

StepUp · Accepted Answer · 2019-11-08 10:16:39Z

1

You can use split function to make an array:

let coords = '[42.46329472141537,21.46498522471254],[42.463191829327116,21.4654574564449],[42.463524249310545,21.465586246917347],[42.463642970305486,21.465092550106277]';
let array = coords.split('],[')
              .map( c=> c.replace(/\[/g, '').replace(/]/g, '').split(','));
console.log(array);

edited Nov 8, 2019 at 10:16

answered Nov 8, 2019 at 10:05

StepUp

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1 Comment

Flamur Beqiraj Over a year ago

Good ide, using replace after a split... Thank you for answering ^^.

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