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Re: (Golf) Shortest Graph Distance

by no_slogan (Deacon)
on May 12, 2001 at 00:03 UTC ( [id://79830] : note . print w/replies, xml ) Need Help??

in reply to (Golf) Shortest Graph Distance

My first try. Passes -w and strict. 172 characters.
sub path { my($g,$a,$b,$x,$y,%s)=@_;$s{$a}=[0,[$a]];for(%$g){for(keys%s){$s{$x}&& +$s{$_}[0]+$y>$s{$x}[0]or$s{$x}=[$s{$_}[0]+$y,[@{$s{$_}[1]},$x]]while( +$x,$y)=each%{$g->{$_}}}}$s{$b}[1] }

Update:Oops, it returns an arrayref instead of an array. No point in fixing it, chipmunk's solution puts mine to shame anyway.