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(tye)Re: varying length multi-dimensional hashes

by tye (Sage)
on Oct 04, 2000 at 23:29 UTC ( #35317=note: print w/replies, xml ) Need Help??

in reply to varying length multi-dimensional hashes

Okay, here is one way to populate the hash:

#!/usr/bin/perl -w use strict; my %hash; while( <> ) { chomp $_; my @trib= grep { "" ne $_ } split /(...)/, $_; my $ref= \\%hash; while( @trib ) { $ref= \$$ref->{shift @trib}; } $$ref++; }

Note how I avoided having to save shift @trib to index into the next subhash by keeping a reference to the slot for the hash value instead of a reference to the hash.

If that code makes sense to you right away, then you are either sick, overlooking something, or do way too much work with Perl references. (:

P.S. I was seriously disappointed that

my @trib= split /(?<=\G...)/, $_;
doesn't work because split doesn't set pos($_) the way /(?<=\G...)/g would.

        - tye (but my friends call me "Tye")

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