On 2009-Feb-23, at 10:09 am, TSa wrote:
I also think that time and numbers in general should be treated in
a fuzzy way by smart match.
My thought is to have == take a :within adverb, at least for imprecise
types like Num, that could be used to specify how close values need to
come in order to be considered equal.
So instead of:
if abs($x-$y)<$epsilon { ... }
you could say:
if $x==$y :within($epsilon) { ... }
which makes your tests for equality look like tests for equality.
I'd even suggest that the :within be mandatory, to guarantee that the
coder is aware that "$x==$y" is probably not DWIM. Of course, there
should also be an easy way to set epsilon across a scope, like:
use Num :precision(0); # force exact matches in this block
-David
