On Thu, 15 Nov 2007 12:31:07 +0100, Henning Thielemann
<[EMAIL PROTECTED]> wrote:
On Tue, 13 Nov 2007, Dan Piponi wrote:
On Nov 13, 2007 1:24 PM, Ryan Ingram <[EMAIL PROTECTED]> wrote:
> I tend to prefer where, but I think that guards & function
declarations are
> more readable than giant if-thens and case constructs.
Up until yesterday I had presumed that guards only applied to
functions. But I was poking about in the Random module and discovered
that you can write things like
a | x > 1 = 1
| x < -1 = -1
| otherwise = x
Btw. I would write here
min 1 (max (-1) x)
or even better define a function for such clipping, since it is needed
quite often.
The value of 'a' needs only be calculated once; when defined at top level,
'a' is a CAF; in a 'where' clause, the value is also calculated once.
--
Met vriendelijke groet,
Henk-Jan van Tuyl
--
http://functor.bamikanarie.com
http://Van.Tuyl.eu/
--
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