8/8/2019 Erlang - Cheatsheet v1.0

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ERLANG CHEAT SHEET V1.0Marouan OMEZZINE(marouan.omezzine[~at~]gmail[~dot~]com) http://www.myownpercept.com/2009/03/erlang-cheat-sheet/SAMPLE MODULEmodule(foo).

export([sayhi/0]).

% This is a comment.

sayhi() ->

o:format("Happy Erlanging!~n" ).

GETTING HELPerl -man

CASE EXPRESSIONScase Expression of

Pattern1 [when Guard1] -> Expr_seq1;Pattern2 [when Guard2] -> Expr_seq2;...

end

F EXPRESSIONSf

Guard1 ->Expr_seq1;

Guard2 ->Expr_seq2;

...end

TERM COMPARISONSX> Y X is greater than Y.X< Y X is less than Y.X=< Y X is equal to or less than Y.X>= Y X is greater than or equal to Y.X== Y X is equal to Y.X/= Y X is not equal to Y.X=:= Y X is identical to Y.X=/= Y X is not identical to Y.

OIo:format( I am ~s~n, [String]).Io:fwrite(I am ~s~n, [String]).~n : new line | ~s: string |~f=> float |~w:standard output |~p: like ~w but breaks after eachline

LISTListA = [1,2,3,4].Returns [1,2,3,4]

ListB = [1+7,hello,2-2,{cost, apple, 30-20},3].Returns [8,hello,0,{cost,apple,10},3]

[H|T] = ListA.Returns the Head and Tail.

Comprehensions

L = [ X*X || X X*X end, [1,2,3])

This gives the output: [1,4,9]Simple Comprehensions

L = [ {X,Y} || X