since the data files are effectively presorted...
ObAlgorithmDiff:
#!/usr/bin/perl -w
use strict;
use Algorithm::Diff qw(traverse_sequences);
die unless @ARGV == 2 and $ARGV[0] ne $ARGV[1];
my @files = @ARGV;
my %data;
push @{$data{$ARGV}}, $_ while <>;
my $a = $data{$files[0]};
my $b = $data{$files[1]};
my (@additions, @deletions);
traverse_sequences $a, $b, {
DISCARD_A => sub { push @deletions, $a->[$_[0]] },
DISCARD_B => sub { push @additions, $b->[$_[0]] },
};
if (@deletions)
{
print "Deletions:", $/;
print for @deletions;
print $/;
}
if (@additions)
{
print "Additions:", $/;
print for @additions;
print $/;
}
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