To split a JavaScript array into N arrays, we can use the splice method.
For instance, we write
const split = (array, n) => {
const [...arr] = array;
const res = [];
while (arr.length) {
res.push(arr.splice(0, n));
}
return res;
};
to define the split function.
In it, we make a copy of array with the rest operator.
And then we use a while loop that calls arr.splice to remove the items from index 0 to n - 1 from arr and return them in an array.
Then we call res.push to append the array into res.
This is done until arr is empty.
