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| defmodule Utils do | |
| def value_at(list, 0), do: List.first(list) | |
| def value_at(list, index) when index > length(list), do: raise "Index(#{index}) out of bounds on List" | |
| def value_at(list, index) when index > 0 do | |
| [_ | tail] = list | |
| value_at(tail, index - 1) | |
| end | |
| end |
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