List comprehension vs. Enum module

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1

I have a question about List comprehensions vs the Enum module. While the Enum module can basically do what the comprehension can do… such as

def my_function(arr) do
  for x <- arr, do: IO.inspect(x)
end

vs something like

def my_function(arr) do
  Enum.map(arr, fn x -> IO.inspect(x) end)
end

is there any performance gains using one rather than the other or any places where one approach is favorable?

2

Hello and welcome,

For simple example, it might look the same… but not really, try to do this with Enum :slight_smile:

iex> for x <- 0..3, y <- 2..4, x > 1 and y < 3, do: {x, y}, into: %{}
%{2 => 2, 3 => 2}

comprehension can accept many generators and filters

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3

well then… that made the distinction pretty clear. hah thanks!

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