[Chicago-talk] appending hashes
Andy_Bach at wiwb.uscourts.gov
Andy_Bach at wiwb.uscourts.gov
Mon Nov 3 10:22:40 CST 2003
my %h = (a=>1, b=>2, c=>3);
my %a = (d=>4, e=>5);
%h = (%h, %a);
for my $key ( keys %h ) {
print "Key: $key: $h{$key}\n"
}
A hash is just (sort of) a list of key value pairs, so making one big
array/list of it ... the '=>' Supercomma is just a comma that
automatically quotes the lhs, i.e
my %a = ('a', 1, ...);
is the same as:
my %a = (a => 1, ...)
%h = (%h, %a);
just unrolls the hashs and rolls them all back up again.
You'd think there'd be a way to push (%a) on to the end of %h w/o
unrolling %h (what if its really big or something?) but, besides the map
sort of method, I can't think of a way.
a
Andy Bach, Sys. Mangler
Internet: andy_bach at wiwb.uscourts.gov
VOICE: (608) 261-5738 FAX 264-5030
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