cloning a 2d array using JSON.stringify()

Question

How are 2d arrays cloned using json.stringify and json.pasrse ?I came across this function which does but couldn't get the technique.What are some other methods to achieve the same?

Note: The JSON.stringify() method converts a JavaScript value to a JSON string.

let g2 = arrayclone(this.state.gridfull);// note gridfull is 2d array 
        function arrayclone(arr) {
        return JSON.parse(JSON.stringify(arr));
}

JSON.parse(JSON.stringify(arr)) is a usual method to clone any kind of object or array: You convert it to a string and back to a new object/array — tru7
– tru7, Commented Jan 25, 2018 at 23:52
oh . i see being new to reactjs and javascript ,it looked alien concept to me . — jammy
– jammy, Commented Jan 25, 2018 at 23:54

marcelotokarnia · Accepted Answer · 2018-01-26 02:21:46Z

4

You could use ES6 deestructurtig:

[...arr]

Or you could you Array.from:

Array.from(arr)

Or you could use concat:

[].concat(arr)

Or you could use slice:

arr.slice()
arr.slice(0)

You could create an empty array and iterate over your original one pushing elements to the new one.

I think that's pretty much it.

Hope it helps.

edited Jan 26, 2018 at 2:21

answered Jan 26, 2018 at 0:09

marcelotokarnia

3861 silver badge6 bronze badges

Sign up to request clarification or add additional context in comments.

Collectives™ on Stack Overflow

cloning a 2d array using JSON.stringify()

1 Answer 1

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Your Answer

Sign up or log in

Post as a guest

Related