Re^2: importing all the values stored in an HoH into an array

This worked like a charm, Thanks!

Better yet, I think I can make some sense out of how the references work.

one question: In the line:

for my $word ( keys %{ $hash{ $w1 }{ $w2 }{ words } } ) {
[download]

What does 'keys' stand for? Is it a reference?

Thank you very much for your help!

-mox

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Re^3: importing all the values stored in an HoH into an array by johngg (Canon) on Oct 31, 2006 at 13:48 UTC
`keys` is a function for pulling out all the keys from a hash. There is also a `values` function for ... er ... pulling out the values. You should also be aware of `each`. Here is an example. `use strict; use warnings; my %dets = ( name => q{fred}, age => 33); while (my ($key, $value) = each %dets) { # Do something with key and value here }` [download] Note that you can't predict the order in which these functions will present keys, values or key/value pairs. I hope this is of use. Cheers, JohnGG	[reply] [d/l] [select]
Re^4: importing all the values stored in an HoH into an array by chinamox (Scribe) on Oct 31, 2006 at 14:02 UTC
Thank you for the example. It makes sense that there would be no predictable order for how keys, values, or key/value pairs are presented because a hash is not indexed like an array is. Still, these three tools will be most useful in my future dealings with hashes. cheers -mox	[reply]
Re^3: importing all the values stored in an HoH into an array by davorg (Chancellor) on Oct 31, 2006 at 13:46 UTC
What does 'keys' stand for? Is it a reference? 'keys' is a Perl built-in function. It returns a list of the keys in a given hash. You should read the documentation (which I already pointed you to above). -- <http://dave.org.uk> "The first rule of Perl club is you do not talk about Perl club." -- Chip Salzenberg	[reply]