I need to merge two subarrays inside an array without pushing them to the end of the array
let array = [["a"], ["b"], ["c"], ["d"]];
array[1] = array[1].concat[2];
So I basically want array to be
array = [["a"], ["bc"], ["d"]];
Thanks!
You could splice the array and remove the item for adding to another item.
let array = [["a"], ["b"], ["c"], ["d"]];
array[1][0] += array.splice(2, 1).join('');
console.log(array);const arr = [['a'], ['b'], ['c'], ['d']];
arr[1][0] += arr[2][0];
arr.splice(2, 1);
console.log(arr);