How do you pass a function as a parameter in Elixir?

elixir
Matt picture Matt · Mar 21, 2014 · Viewed 16.6k times · Source

How do you specify a function as a parameter to another function in Elixir? For instance, pass foo to bar so that bar can then call foo. What is the syntax both in the calling function and the function that receives it?

Answer

rightfold picture rightfold · Mar 21, 2014

Use &Module.function/arity to pass it, and .(…) to call it.

For example:

def my_hof(f)
    f.([1, 2, 3], &(&1 * 2))
end

my_hof(&Enum.map/2)

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