in reply to Re: Formalizing an array type problem, looking for solution
in thread Formalizing an array type problem, looking for solution
I've no idea what a "consensus path" is so the following code, while fun to write, is probably wildly wide of what you want to achieve. It may act as a starting point for discussion though.
#!/usr/bin/perl -l use strict; use warnings; my @paths; push @paths, [map {chomp; $_} split /\s*:\s*/] while <DATA>; my @pattern = @{pop @paths}; for my $part (@pattern) { my ($node, $dir) = split '', $part; for my $testPattern (@paths) { if ($dir eq '+') { next if $testPattern->[0] !~ $node; $part = $testPattern; last; } else { next if $testPattern->[-1] !~ $node; $part = [map {tr~+-~-+~; $_} reverse @$testPattern]; last; } } die "Can't match $part in '@pattern'\n" if 'ARRAY' ne ref $part; } print join ' : ', map {@$_} @pattern; __DATA__ A+ : B+ C+ : D- : E- C+ : E-
Prints:
C- : D+ : E+ : E+ : D+ : C-
Premature optimization is the root of all job security
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Re^3: Formalizing an array type problem, looking for solution
by Anonymous Monk on Sep 02, 2016 at 21:08 UTC | |
by GrandFather (Saint) on Sep 04, 2016 at 21:08 UTC |
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Seekers of Perl Wisdom