From: Gyepi SAM <[email protected]>
Date: Mon, 8 Apr 2013 15:02:55 -0400
On Mon, Apr 08, 2013 at 10:54:47AM -0400, Ricker, William wrote:
> Have we mentioned the other solution?
> The Implicit loops of map {block} list; should produce more
> optimized code and reads better too.
map should produce better code and does reads better but it also
iterates the entire list and you can't break out of it . . .
Not quite true, as you can "goto" a label outside of the block:
sub find_odd {
# Return the first odd argument.
my (@values) = @_;
my $result;
map { $result = $_ and goto LAST
if $_ & 1;
} @values;
LAST:
return $result;
}
It's hard to think of a case where this would be better than a simple
loop, which is both smaller and more readable. However, this technique
also gives you an early exit when mapping over a tree recursively.
-- Bob Rogers
http://www.rgrjr.com/
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