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adamhunter
Erlang-Training

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-module (doubler).

-export ([doubler/1]).

doubler(Data) ->

[X * 2 || X <- Data].

doubler(Data) ->

doubler(Data, []).

doubler([], Accum) ->

lists:reverse(Accum);

doubler([H|T], Accum) ->

doubler(T, [H * 2 | Accum]).

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