Beefy Boxes and Bandwidth Generously Provided by pair Networks
Perl Monk, Perl Meditation

Re: How to make buckets of like data

by BrowserUk (Pope)
on Feb 05, 2013 at 20:07 UTC ( #1017269=note: print w/replies, xml ) Need Help??

in reply to How to make buckets of like data

Am I missing something simple here?

I don't believe you can do it in one pass. This works, but might be simplified?:

#! perl -slw use strict; use Data::Dump qw[ pp ]; my @array = (['A','B'],['C','D'],['A','C'],['E','F'],['F','G']); my %h; for( @array ) { my( $x, $y ) = @$_; $h{ $x }{ $y } = 1; $h{ $y }{ $x } = 1; } OUTER: for my $x ( reverse sort keys %h ) { for my $y ( reverse sort keys %h ) { next if $x eq $y; if( exists $h{ $y }{ $x } ) { $h{ $y }{ $_ } = 1 for keys %{ $h{ $x } }; delete $h{ $x }; next OUTER; } } } my @buckets = map[ sort keys %{ $h{ $_ } } ], keys %h; pp \@buckets; __END__ C:\test>1017261 [["A", "B", "C", "D"], ["E", "F", "G"]]

With the rise and rise of 'Social' network sites: 'Computers are making people easier to use everyday'
Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.
"Science is about questioning the status quo. Questioning authority".
In the absence of evidence, opinion is indistinguishable from prejudice.

Log In?

What's my password?
Create A New User
Node Status?
node history
Node Type: note [id://1017269]
and all is quiet...

How do I use this? | Other CB clients
Other Users?
Others drinking their drinks and smoking their pipes about the Monastery: (7)
As of 2018-05-24 16:19 GMT
Find Nodes?
    Voting Booth?