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package LCS::Similar; |
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17317
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use 5.010001; |
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use strict; |
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use warnings; |
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1063
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our $VERSION = '0.03'; |
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#use utf8; |
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#use Data::Dumper; |
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sub new { |
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1
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1711
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my $class = shift; |
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# uncoverable condition false |
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100
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bless @_ ? @_ > 1 ? {@_} : {%{$_[0]}} : {}, ref $class || $class; |
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} |
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sub LCS { |
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49
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1
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344954
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my ($self, $X, $Y, $compare, $threshold) = @_; |
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49
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100
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18274
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246
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$compare //= sub { $_[0] eq $_[1] }; |
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18274
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59559
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20
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49
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my $m = scalar @$X; |
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my $n = scalar @$Y; |
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my $c = []; |
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49
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63
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my ($i,$j); |
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134
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for ($i=0;$i<=$m;$i++) { |
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659
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1299
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for ($j=0;$j<=$n;$j++) { |
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20446
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47028
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$c->[$i][$j]=0; |
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} |
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} |
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49
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for ($i=1;$i<=$m;$i++) { |
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610
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1310
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for ($j=1;$j<=$n;$j++) { |
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19221
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42532
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$c->[$i][$j] = $self->max3( |
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&$compare( |
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$X->[$i-1], |
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$Y->[$j-1], |
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$threshold |
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) + $c->[$i-1][$j-1], |
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$c->[$i][$j-1], |
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$c->[$i-1][$j], |
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); |
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} |
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} |
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139
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my $path = $self->_lcs($X,$Y,$c,$m,$n,[],$compare, $threshold); |
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649
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return $path; |
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} |
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48
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49
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8
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100
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1
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663
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sub max { ($_[1] > $_[2]) ? $_[1] : $_[2]; } |
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sub max3 { |
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19233
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100
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19233
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1
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736768
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($_[1] >= $_[2]) |
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100
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100
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? ($_[1] >= $_[3] |
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? $_[1] : $_[3] |
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) |
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: ($_[2] >= $_[3] |
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? $_[2] : $_[3] |
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); |
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} |
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61
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sub _lcs { |
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49
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49
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100
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my ($self,$X,$Y,$c,$i,$j,$L,$compare, $threshold) = @_; |
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64
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49
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100
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280
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while ($i > 0 && $j > 0) { |
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635
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100
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1356
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if ( &$compare($X->[$i-1],$Y->[$j-1], $threshold) ) { |
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100
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66
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435
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25751
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unshift @{$L},[$i-1,$j-1]; |
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435
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1258
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67
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435
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581
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$i--; |
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435
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1901
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$j--; |
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} |
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elsif ($c->[$i][$j] == $c->[$i-1][$j]) { |
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154
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8697
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$i--; |
72
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} |
73
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else { |
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46
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790
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$j--; |
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} |
76
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} |
77
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49
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107
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return $L; |
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} |
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80
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1; |
81
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82
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__END__ |