[erlang-questions] Order of evaluation of guards
Mon Jan 5 09:57:49 CET 2015
The last is correct according to your guards: M < 100. Perhaps you could try:
... when N > 0, M > 0, N < 100;
N > 0, M > 0, M < 100 -> ...
Happy New Year!
> On 5 Jan 2015, at 08:51, Martin Koroudjiev <mrtndimitrov@REDACTED> wrote:
> First of all - Happy New Year!
> Suppose we have a function that accepts 2 integers and we want to react
> only when both integers are greater than 0 and one of them is less than 100:
> I tried:
> (dilbert@REDACTED)1> F = fun(N, M) when N > 0, M > 0, N < 100; M < 100
> -> cool; (_, _) -> not_cool end.
> (dilbert@REDACTED)2> F(1,2).
> (dilbert@REDACTED)3> F(1,200).
> (dilbert@REDACTED)4> F(0,200).
> (dilbert@REDACTED)5> F(0,50).
> The last is not correct.
> What is the order of evaluation of the guards? Sadly parentheses are not
> allowed in guards.
> Best regards,
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