Access Multi-Dimensional Arrays With Indexes
Hints
Hint 1
Consider the following multi-dimensional array:
const arr = [[1, 2, 3], [4, 5, 6], [7, 8, 9], [10, 11, 12]];
This is what it looks like in tabular form.
| Position | 0 | 1 | 2 | 3 |
|---|---|---|---|---|
| 0 | 1 | 4 | 7 | 10 |
| 1 | 2 | 5 | 8 | 11 |
| 2 | 3 | 6 | 9 | 12 |
Now all you have to do, is choose the coordinates of the data you desire! For examples, if we want myNum to equal 8, then…
const myNum = arr[2][1]; // Equal to 8
Or, if you want it to equal 1. You do…
const myNum = arr[0][0]; // Equal to 1
You first start off by choosing what column the number is in, then you choose the row. It’s kind of like the x-y coordinate plane!