exported variables (was: RE: How to make GS Widgets)

Jay Nelson <>
Sun Apr 18 00:39:11 CEST 2004


At 10:59 PM 4/17/04 +0200, Ulf Wiger wrote:

>>I assume you intended another clause for the non-valid
>>cases to avoid the program failing with bad_match:
>>
>>validate_color(_) ->
>>      0.
>
>Actually, no, but I was aware of the fact that by doing so,
>I changed the semantics of the code.

Oh, I was trying to reproduce the same semantics in
a different way so that the original poster could compare
them.


>I usually don't silently transform illegal input to default
>values, especially not in early versions. I find that it is
>almost always better to let the program fail in those
>cases. And function_clause is a perfectly good way to fail,
>IMHO.  (:

I agree wholeheartedly with that approach.




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