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kotlinlang

maybe
```
val frameDurationArray = IntArray(frames + 1) { animation?.getDuration(it)!! }
val duration = frameDurationArray.sum()
```

Interesting, I can easily use `reduce` by creating an Array like you do… 
Thanks!

strange, I can call reduce on a range, as ranges are Iterable and reduce is defined for Iterable

<@U6LHLP85C> You are right. I missed the last one here: <https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.collections/reduce.html>

Still, I am not sure why `reduce` did not appear in AS auto-complete. Perhaps I did not put my range inside parentheses.