This might be a dumb question but I have a string like so:
"[1, 2, 3, 4]"
I want to convert it into an actual array:
[1, 2, 3, 4]
How do I go about this?
4 Answers
Just JSON parse it! JSON.parse("[1, 2, 3, 4]")
Comments
var string = "[1, 2, 3, 4]";
JSON.parse(string);
Comments
You should use AND validate Tom Finney's or Ashishya11's or Hasee Amarathunga's answer because mine contains a gross security vulnerability if your string input comes from an untrusted source. But anyways, you can also do it like this:
const array = eval('[1, 2, 3, 4]')
8 Comments
Nick Parsons
or an alternative to eval, a function constructor:
const array = Function("return [1, 2, 3, 4]")() - which apparently is supposed to be less of a security threat, but can still be harmful
Jonas Wilms
@nick no, it isn't. Also I don't get why this answer is necessary.
Hammerbot
This answer is not necessary, I was just pointing out the fact that this is a solution to OP's question after 3 exact same solutions provided as answers. I can delete it if you find it harmful
Nick Parsons
@JonasWilms when you say “it isn’t” do you mean that it isn’t an alternative to eval or that it isn’t less of a security threat?
Jonas Wilms
@nick both ... ...
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Try this:
JSON.parse("[1, 2, 3, 4]")
JSON.parse("[1, 2, 3, 4]")- developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/…