Index out of range in multidimensional array in Swift

Question

var tri = [[Int]]();
tri[0][0] = 321;

This code causes this error:

fatal error: Index out of range

What's wrong?

score -1 · Answer 1 · answered Aug 17 '17 at 22:32

-1

You're accessing the first element of the first subarray of the array. But your array doesn't contain any subarrays, so it crashes.

answered Aug 17 '17 at 22:32

Alexander

How can I fix that? – A. Bhakta Aug 17 '17 at 22:36
@A.Bhakta Depends. Is `tri` only going to contain static data? – Alexander Aug 17 '17 at 22:36
No, it will contain dynamic data. – A. Bhakta Aug 17 '17 at 22:38
@A.Bhakta So then you'll need to append empty subarrays to the main array, and then append to those subarrays. What exactly is this data? `tri` doesn't really say much – Alexander Aug 17 '17 at 22:49

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