moving general-purpose functions from httpd_util to stdlib

[Robert Virding]

Definitely the closed case. The extra cost is negligible and the meaning
much clearer, especially if the test is not so obviously a "safe" boolean.

Robert

----- Original Message ----- 
From: "Chris Pressey" <cpressey@REDACTED>
To: "Robert Virding" <robert.virding@REDACTED>
Cc: <eleberg@REDACTED>; <erlang-questions@REDACTED>
Sent: Tuesday, April 15, 2003 8:06 PM
Subject: Re: moving general-purpose functions from httpd_util to stdlib


> Thanks, everybody.
> 
> But I have to apologize for that bad example.  The 'error' is a red
> herring that clouds the issue.  The question is more about whether it is
> wiser, in general, to write "open" or "closed" cases.
> 
> A (possibly) better example:
> 
>   % "open" case
>   case A > B of
>     true ->
>       41;
>     _ ->
>       42
>   end
> 
>   % "closed" case
>   case A > B of
>     true ->
>       41;
>     false ->
>       42
>   end
> 
>   % "let-it-crash" style - seems almost like a different problem
>   case catch begin
>                 true = A > B,
>                 41
>              end of
>     {'EXIT', Reason} ->
>       42;
>     Result ->
>       Result
>   end
> 
> -Chris