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terinjokes/foobar.ex

Last active December 30, 2015 23:08
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Simple Elixir lambda example
Raw
foobar.ex
defmodule FooBar do
def update_header(headers, key, fun) do
if List.keymember?(headers, key, 0) do
value = fun.(headers)
List.keystore(headers, key, 0, {key, value})
else
value = fun.(nil)
List.keystore(headers, key, 0, {key, value})
end
end
end
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