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118 chars:
sub state { 1&index" AKALCAARAZCOCTDCDEFLGAHIIAIDILINKSKTKYLAMAMDMEMIMNNCMOMSMTOHN +DNENHNJNMPANVNYOKORRISCSDTNTXUTVAVTWAWIWVWY",pop }
And it's 117 chars if you replace pop with $_, as the original rules ask.

The character string was constructed to ensure that a valid state would never match a non-valid boundary. It was easier than I thought:

#!/usr/bin/perl use strict; $|++; my @states = qw( AK AL AR AZ CA CO CT DC DE FL GA HI IA ID IL IN KS KT KY LA MA MD ME MI MN MO MS MT NC ND NE NH NJ NM NV NY OH OK OR PA RI SC SD TN TX UT VA VT WA WI WV WY ); my %states = map { $_ => 1 } @states; try("", \@states); sub try { print "try: $_[0] @{$_[1]}\n"; my $prefix = shift; my @later = @{+shift}; unless (@later) { print "WINNER: $prefix\n"; exit; } for my $i (0..$#later) { my $prefix2 = "$prefix$later[$i]"; if (length $prefix2 < 3 or not $states{substr($prefix2, -3, 2)}) { ## worth recursing try($prefix2, [@later[0..$i-1, $i+1..$#later]]); } } }

-- Randal L. Schwartz, Perl hacker


In reply to Re: Golf challange: match U.S. State names by merlyn
in thread Golf challange: match U.S. State names by John M. Dlugosz

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    [Tux]: but I <3 the way people test here
    [Tanktalus]: Tux: use sort -V to sort your perls. Looks much nicer that way ;)
    [Tux]: Hmmm, pm-cb-g does not seem to accept dead-key diacriticals as all my other (perl) applications do. choroba?
    [Tux]: Tanktalus this was the output of autocompletion in my tcsh
    [erix]: ah, but I have different compilation- versions of Pg too, so double that: 26 * 2 = more than 50 :P
    [Tanktalus]: When I showed one of my coworkers my perl list, he told me that my sort routine was broken when 5.8.8 showed up after 5.26.0 ... which made me investigate sort, which is when I found this option :)
    erix atm running billion row table replication (pg-)tests...
    [Tanktalus]: Tux: ah, still... :)
    Tux writes mail to tcsh developers ...
    Tanktalus snickers :)

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