Convert string to array JavaScript

Question

I have urlencoded JSON data:

%5B%5B"Task"%2C"Hours%20per%20Day"%5D%2C%5B"Work"%2C11%5D%2C%5B"Eat"%2C2%5D%2C%5B"Commute"%2C2%5D%2C%5B"Watch%20TV"%2C2%5D%2C%5B"Sleep"%2C7%5D%5D

I have already decoded it to:

"[["Task","Hours per Day"],["Work",11],["Eat",2],["Commute",2],["Watch TV",0.5],["Sleep",7]]"

As you can see, this is a string, not an array, and I am trying to convert it to an array.

Sidenote:

I am making a page which will display charts using Google Charts that is having this problem. All help is welcome!

@adeneo eval is actually your enemy, use it wisely or never at all. This case is not a wise case to use it since the input is likely from a URL, which could be spoofed for phishing and you'd be subject to script injection. — Ruan Mendes
– Ruan Mendes, Commented Mar 28, 2014 at 21:19
@JuanMendes - "eval is your friend" is more of a joke really, as opposed to the usual "eval is evil". — adeneo
– adeneo, Commented Mar 28, 2014 at 21:21

Ruan Mendes · Accepted Answer · 2014-03-28 21:25:44Z

3

Use JSON.parse

var jsArray = JSON.parse('[["Task","Hours per Day"],["Work",11],["Eat",2],["Commute",2],["Watch TV",0.5],["Sleep",7]]');
console.log(jsArray[0][0]) // "Task"
console.log(jsArray[0][1]) // "Hours per Day"

Using eval would also work but would expose you to script injection if you are getting that value from an untrusted source, like the URL parameters, which can be spoofed for fishing

edited Mar 28, 2014 at 21:25

answered Mar 28, 2014 at 21:15

Ruan Mendes

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1 Comment

bren Over a year ago

Good. Thank you for submitting an answer instead of a comment. That way I can accept it

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