Jeff 'japhy' Pinyan wrote:
Gunnar Hjalmarsson said:
Jeff 'japhy' Pinyan wrote:
The general way is:
# to add %w to %q
@q{keys %w} = values %w;
If there are overlapping keys, %w's values will be used.
Why not just
%q = (%q, %w);
Benchmark it to see which is better.
The slice method seems to be faster.
use Benchmark 'cmpthese';
my %y = (three => 3, four => 4);
cmpthese -5, {
hashslice => sub {
my %x = (one => 1, two => 2);
@x{ keys %y } = values %y;
},
lists => sub {
my %x = (one => 1, two => 2);
%x = (%x, %y);
},
};
Result:
Rate lists hashslice
lists 21936/s -- -40%
hashslice 36517/s 66% --
Using %q = (%w, %q) allows you to keep %q's values, though.
And requires less typing. :)
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Gunnar Hjalmarsson
Email: http://www.gunnar.cc/cgi-bin/contact.pl
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