Beefy Boxes and Bandwidth Generously Provided by pair Networks
Keep It Simple, Stupid

Re: Unique key/value pair in Multiple key values pair in Hash

by roboticus (Chancellor)
on Feb 18, 2013 at 13:49 UTC ( #1019343=note: print w/replies, xml ) Need Help??

in reply to Unique key/value pair in Multiple key values pair in Hash


If you're interested in the unique values, I'd suggest adding another level to your hash, something like:

use strict; use warnings; my %hash; while (<DATA>) { s/\s+$//; my ($key1, $key2) = split /\s+/, $_; $hash{$key1}{$key2}++; } for my $k1 (sort keys %hash) { print "$k1: ", join(", ", sort keys %{$hash{$k1}}), "\n"; } __DATA__ Lemon Juice Lemon Cake Apple Cider Lemon Cake Apple Butter Apple Sauce Apple Juice Lemon Juice

Note: The code is untested, but I'd expect output like:

Apple: Butter, Cider, Juice, Sauce Lemon: Cake, Juice


When your only tool is a hammer, all problems look like your thumb.

Log In?

What's my password?
Create A New User
Node Status?
node history
Node Type: note [id://1019343]
[erix]: swedes in winter have too much time on their hands

How do I use this? | Other CB clients
Other Users?
Others romping around the Monastery: (9)
As of 2018-02-22 15:28 GMT
Find Nodes?
    Voting Booth?
    When it is dark outside I am happiest to see ...

    Results (294 votes). Check out past polls.