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[erlang/en] Fix #1142

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Julien Cretel 2015-06-16 18:14:36 +01:00
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@ -164,6 +164,13 @@ is_cat(A) -> false.
is_dog(A) when is_atom(A), A =:= dog -> true;
is_dog(A) -> false.
% We won't dwell on the `=:=` operator here; just be aware that it is used to
% check whether two Erlang expressions have the same value *and* the same type.
% Contrast this behaviour to that of the `==` operator:
1 + 2 =:= 3. % true
1 + 2 =:= 3.0. % false
1 + 2 == 3.0. % true
% A guard sequence is either a single guard or a series of guards, separated
% by semicolons (`;`). The guard sequence `G1; G2; ...; Gn` is true if at
% least one of the guards `G1`, `G2`, ..., `Gn` evaluates to `true`.