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kotlinlang

is there any std fun on Lists, than when getting by index, if the index is greater than size, it will go back to zero? For instance, size: 3, get(4) will be the same as get(0)

To me, this case seems like a bit of a design issue. I think the index should somehow be validated/manipulated before accessing the list.
There is no function for that, but you could add an extension function that uses mod operator on the index

like this:
```fun &lt;T&gt; List&lt;T&gt;.getMod(index: Int) = this.takeIf { it.isNotEmpty() }?.let { get(index % size) }```

or (alternative notation)
```fun &lt;T&gt; List&lt;T&gt;.getMod(index: Int) = if (isEmpty()) null else get(index % size)```

ya, i made one myself thanks! Just asked, because was not sure if there is already one