Re^5: Possible for Map to create Hash of Hash?

he can also use things like keys %{$hash{$store}} to list all products.

Agree. But does he need to?

neither shorter to write

It's shorter to write: "$h{$s,$p}" 9 characters. "$h{$s}{$p}" 10 characters. + code to populate hash is simpler.

nor more efficient

Maybe memory usage is not important in this case? And maybe serialization/deserialization time is more important. Who knows.

Also, perl has a special notation for it. That makes me think it's a useful feature for some cases.

Comment on Re^5: Possible for Map to create Hash of Hash?

Replies are listed 'Best First'.
Re^6: Possible for Map to create Hash of Hash? by Anonymous Monk on May 11, 2013 at 14:56 UTC
:D OP-Q: I am using a knife to cut this steak, how can I use scissors? You-A: As an alternative, you can use an improvised spork made of toothpicks, saves two characters!	[reply]
Re^7: Possible for Map to create Hash of Hash? by LanX (Saint) on May 11, 2013 at 15:44 UTC
++ Excellent metaphor! 8) Cheers Rolf ( addicted to the Perl Programming Language)	[reply]