Filling up a 2D array with random numbers in javascript

Question

I\'m really sorry if anything like this has been posted here before but I couldn\'t find anything, I\'m kinda new to the site still!

So for a while now I\'ve been

Answer 1

You were thinking in the right direction but there are some errors in your code ;)

• You have to initialize the array first before you can push elements into it.
• And you were counting i++ twice

Javascript

var ground = []; // Initialize array
for (var i = 0 ; i < 15; i++) {
    ground[i] = []; // Initialize inner array
    for (var j = 0; j < 9; j++) { // i++ needs to be j++
        ground[i][j] = (Math.random() * 5 | 0) + 6;
    }
}

Maybe even better (reusable)

function createGround(width, height){
    var result = [];
    for (var i = 0 ; i < width; i++) {
        result[i] = [];
        for (var j = 0; j < height; j++) {
            result[i][j] = (Math.random() * 5 | 0) + 6;
        }
    }
    return result;
}
// Create a new ground with width = 15 & height = 9
var ground = createGround(15, 9);