anonymous hash

perumal has asked for the wisdom of the Perl Monks concerning the following question:

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Re: anonymous hash by Joost (Canon) on Jun 12, 2006 at 07:40 UTC
Anonymous hashes are references to hashes that aren't named: `my %normal_hash = ( a => 1, b => 2 ); print $normal_hash{a}; my $hash_ref = \%normal_hash; print $hash_ref->{a}; my $anon_hash = { a => 1, b => 2 }; # note the curly braces print $anon_hash->{a};` [download] See also the perldata and perlref documentation. "What should it profit a man, if he should win a flame war, yet lose his cool?"	[reply] [d/l]
Re: anonymous hash by jaa (Friar) on Jun 12, 2006 at 07:40 UTC
Its a hash without a name of its own - e.g. `my @list; # push an anonymous hash into @list push @list, { apples => 'green', peaches => 'cream' };` [download] The hash is created using a pair of curlies, and then pushed straight into our list. The hash never has a name of its own, so you can only refer to it as a member of the list, e.g. `$list[0]->{pears} = 'expensive';` [download] Regards, Jeff	[reply] [d/l] [select]
Re: anonymous hash by sh1tn (Priest) on Jun 12, 2006 at 07:47 UTC
In addition - use perldoc -q hash 'How can I make the Perl equivalent of a C structure/C++ class/hash or array of hashes or arrays?' or perlreftut	[reply]
Re: anonymous hash by planetscape (Chancellor) on Jun 12, 2006 at 20:24 UTC
IMHO, one of the best discussions of complex data structures, including anonymous arrays/hashes, is to be found in Chapter 3. References and complex data structures of `perlinter.pdf`, available from Perl Training Australia. You'd probably want the most current version of the course notes, though, which have been reworked into `progperl.pdf`, available from the same page noted above. You might also wish to take a look at Introduction to anonymous arrays and hashes. HTH, planetscape	[reply] [d/l] [select]
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