Javascript multidimensional array updating specific element

Question

I have a string that has been converted into an 2D Array in js.

board = "...|.X.|...|"

It is used to represent a game board

each . represent

Answer 1

Two remarks here:

1. Arrays start with index 0 in every dimension.
2. If you access a string as a 2D array, every element is a char rather than a string.

So if you write board[0][0] = 'X'; then you get the right behavior (and that changes the first character of the string, not the second).