JSON: String To Array

Question

Im working with the datatables plugin with JQUERY and I have to get my string into an array. The below code works when I manually set the array.

var myarray = [['Joe','Smith',20,3], ['Kayla','Smith',32,1]]
dt.clear().rows.add(myArray).draw();

when I run console.log(myarray)

[Array[4], Array[4]]

now when I have a string that I get from the back end its in the exact same format, however, like i said its a string.

I tried something like this on a string thats in this format: [['Joe','Smith',20,3], ['Kayla','Smith',32,1]]

var myArray = new Array(mystring);

but when I run console.log(myArray) I get

["[['Joe','Smith',20,3], ['PG','Kayla','Smith',32,1]]"]

Not sure how to get it in the right format. Thanks.

BenM · Accepted Answer · 2017-03-08 18:35:39Z

1

You cannot simply turn a string representation of an array into an array by passing it to the Array constructor. You will need to use valid JSON syntax (i.e. replacing single ' quotes with " double ones).

You can then use JSON.parse() to parse the string back into an array as follows:

let myArray = JSON.parse('[["Joe","Smith",20,3],["Kayla","Smith",32,1]]');
console.log(myArray);

answered Mar 8, 2017 at 18:35

BenM

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