Does map have a traversal order?

Internals & Design
1

Suppose that in map(f, a1, ...) the function f has side-effects, and a1 etc are ordered collections (eg arrays or similar).

Is map guaranteed to traverse the arguments in the linear-index ordering, or could that theoretically change in a new version of Julia? (I know that it currently does).

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2

it is not guaranteed

3

Thanks. Is that made explicit anywhere? Or we simply don’t know that it is guaranteed, so it isn’t?

4

My information is based only on seeing this convo come up a few times on slack, and each time it was said this is not guaranteed :slight_smile:

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