I'm working on a discord bot in node js and i need to get the length of the 2 dimentions of a 2d array. My array is structurated like this, that algo get expanded at the bottom when needed:
var users = [["","","","",""]];
now i need to know how to get the dimentions. i was originaly doing like this, but it didn't work 🙃.
// for the y length
users.length
// for the x length
users[i].length
hope you can help
thanks in advance
Enrico 😊
Actually you almost are correct:
var users = [[1,2],[3,4]]
users.length // y
users[0].length // x
Just keeps in mind that index for each X demantion statred since zero , and might be different for each row.
Your array var users = [["","","","",""]]; is a 2d array where only the 0th index is occupied. In your case, users[i].length would probably throw a length not defined error of some sort at index 1 and beyond. You should used users[0].length to get the length of the 2d element
Assuming that none of the elements in the array varies its length from the first one you could just get the length of the first element with
var dimensions = [users.length, users[0].length]
// returns [1, 5]
In a more practical world, probably is better for you to get the dimensions on each of the elements on the array users and decide on whether to use the biggest or the smallest, naturally I'll chose the biggest.
var users = [["", "", ""], ["", ""], ["", "", "", ""]];
var elementsLength = users.map((user) => (user.length));
var lengthY = Math.max(...elementsLength);
var lengthX = users.length;
var dimensions = [lengthX, lengthY];
// returns [3, 4]
It all depends on what you want.
