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22 lines
541 B
Elixir
22 lines
541 B
Elixir
# Write a mapsum function that takes a list and a function. It applies the function to each element of the list and then sums the result, so
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# iex> MyList.mapsum [1, 2, 3], &(&1 * &1)
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# 14
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defmodule MyList do
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def mapsum(list, func) do
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mapsum(list, 0, func)
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end
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defp mapsum([head | tail], acc, func) do
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mapsum(tail, acc + func.(head), func)
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end
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defp mapsum([], acc, _func) do
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acc
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end
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end
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IO.puts MyList.mapsum([1, 2, 3], fn (n) -> n end)
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IO.puts MyList.mapsum('A', fn (n) -> n end)
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