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GitHub - pragdave/mdef: Easily define multiple function heads in elixir
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GitHub - pragdave/mdef: Easily define multiple function heads in elixir

GitHub - pragdave/mdef: Easily define multiple function heads in elixir

MultiDef—Define a function with multiple heads

Add the dependency {:multidef, "> 0.0.0"} to mix.exs.

Use it like this:

defmodule Test do

  import MultiDef

  mdef fib do
    0 -> 0
    1 -> 1
    n -> fib(n-1) + fib(n-1)
  end
end
IO.puts Test.fib(20)

When clauses can be used:

defmodule Test do

  import MultiDef

  mdef fib do
    0 -> 0
    1 -> 1
    n when n > 0 -> fib(n-1) + fib(n-1)
  end
end
IO.puts Test.fib(20)

Does not support default arguments.

Does not enforce that all heads have the same arity (deliberately).


Copyright © 2014 Dave Thomas, The Pragmatic Programmers
@/+pragdave, [email protected]

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