You can nest maps in much the same way you can nest for loops. It's not clear that there is a win doing that here, but consider:
my @items = map {$licensehash{$_->[0]}{$_->[1]}} sort {$a->[2] cmp $b-
+>[2]}
map {
my $top = $_;
map {[$top, $_, $licensehash{$top}{$_}[3]]} keys %{$licensehash{$_
+}}
} keys %licensehash;
print "$_->[3]: $_->[0]\n" for @items;
Prints:
Chassis Serial:
Creation Date:
Creation User:
Customer Name:
Epoc:
Key Type:
LMU Version:
Lenovo Serial:
Lenovo UUID:
MAC 1/UUID:
MAC 2:
NAS:
Sync Replication:
iSCSI:
iTX Version:
Note that @items contains the sorted values rather than the keys which cleans up the print statement somewhat. The map just to the right of the @items assignment does the lookup.
If the code changes take longer than the time saved, it's fast enough already.
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