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ngnguyen1/map_fold.erl

Created June 20, 2016 18:21
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map_fold.erl
%% fold here
fold(_, Start, []) -> Start;
fold(F, Start, [H|T]) -> fold(F, F(H,Start), T).
%% Use fold to write the map function.
map(F,L) -> fold(fun(X, Acc) -> [F(X)|Acc] end, [], L).
%% Exp: map(fun(X) -> X+1 end, lists:seq(1,3)). => [2,3,4]
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