Convert array of array's each array into array of string

Question

I am trying to convert an array of array's each array into a string.

I know the method flat where all the array of the array becomes a single array but this is not solving my full purpose.

array = [['ba','ab'],['bab','abb']]

my tried code is:

let merged = array.map(a => {
 console.log(a)
 a.reduce((a, b) => a.concat(b), []);
})
console.log(merged);

Expected output is: [['ba,ab'],['bab, abb']]

• Uthistran Selvaraj: what is your expected output?
• Premjeet Kumar: @UthistranSelvaraj i have given in the bottom

Answer 1

You can use Array.prototype.join() for this purpose. From the documentation:

The join() method creates and returns a new string by concatenating all of the elements in an array (or an array-like object), separated by commas or a specified separator string. If the array has only one item, then that item will be returned without using the separator.

Like the following:

const array = [['ba', 'ab'], ['bab', 'abb']];
const result = array.map(e => e.join(','));
console.log(result);

Hope that helps!

• Premjeet Kumar: i posted wrong output can you tell me how to get this output ?

Answer 2

You could map the joined values.

var array = [['ba', 'ab'], ['bab', 'abb']],
 result = array.map(a => a.join(', '));
console.log(result);

Answer 3

With respect to your comment on @norbitrial answer. Plus a little JS type conversion hack (just for education, you'd better use join(",")). And I think you should accept his answer.

const array = [['ba', 'ab'], ['bab', 'abb']];
const result = array.map(e => ["" + e]);
console.log(result);