CODEWITHSUNDEEP
javascript
Abhinav
Abhinav

Reputation: 23

Convert string into an array of arrays in javascript

I have a string as follows:

my_string = "['page1',5],['page2',3],['page3',8]";

I want to convert this into the following:

my_array = [['page1',5],['page2',3],['page3',8]];

I know that there is a split function in which i have to specify delimiter.When i did this:-

my_string.split(',');

I got the following result:

 ["['page1'", "5]", "['page2'", "3]", "['page3'", "8]"]

Upvotes: 1

Views: 3797

Answers (3)

Nick Parsons
Nick Parsons

Reputation: 50674

The first thing you should try and do is to make my_string a valid JSON string. That means that instead of single quotes (') you have double quotes (") around your strings. To create a JSON string like this, you can use JSON.stringify() on the data you want to be converted into a string. Below is a valid JSON string of your array which you can use JSON.parse(my_string) on:

const my_string = '[["page1",5],["page2",3],["page3",8]]';
const res = JSON.parse(my_string);
console.log(res);

If you can't do this for whatever reason, then you can try one of the below options.

You can use JSON.parse() and .replace() to make your string a valid JSON string that is parseable like so:

const my_string = "['page1',5],['page2',3],['page3',8]",
stringified = '['+my_string.replace(/'/g, '"')+']';

console.log(JSON.parse(stringified));

Or you can use a Function constructor to "loosly" parse your JSON. Note that you should only use this if my_string is coming from a trusted source (ie: not user input):

const  my_string  = "['page1',5],['page2',3],['page3',8]";
arr = Function('return [' +  my_string + ']')(); 

console.log(arr);

Upvotes: 5

Vivek
Vivek

Reputation: 2755

You can use the eval() function to convert your string to an array. See the code below.

my_string = "['page1',5],['page2',3],['page3',8]";

my_array = eval(`[${my_string}]`);

console.log(my_array);

However, using the eval() function comes with a set of drawbacks if not used properly. Please read through this answer before using eval in any of your serious code.

Upvotes: 1

Oğuzhan Aygün
Oğuzhan Aygün

Reputation: 137

first split the string with "],[" and you got an array like bellow

splitted_string = ["[page1,5", "[page2,3" , "[page3,8"];

then loop this array and get rid of "[" character and you got an array like bellow

splitted_string = ["page1,5", "page2,3" , "page3,8"];

finally loop this array and split the each element with ",". viola! you got what you want like bellow

splitted_string =  [['page1',5],['page2',3],['page3',8]];

Upvotes: -1

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