Knuth-Morris-Pratt string search: Difference between revisions
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(added Raku programming solution) |
m (→{{header|Raku}}: insignificant changes) |
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<lang perl6># 20220810 Raku programming solution |
<lang perl6># 20220810 Raku programming solution |
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sub kmp_search (@S,@W) { |
sub kmp_search (@S where *.Bool, @W where *.Bool) { |
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sub kmp_table (@W) { |
sub kmp_table (@W where *.Bool) { |
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loop (my ($pos,$cnd,@T) = 1,0,-1 ; $pos < @W.elems ; ($pos, $cnd)>> |
loop (my ($pos,$cnd,@T) = 1,0,-1 ; $pos < @W.elems ; ($pos, $cnd)>>++) { |
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if @W[$pos] eq @W[$cnd] { |
if @W[$pos] eq @W[$cnd] { |
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@T[$pos] = @T[$cnd] |
@T[$pos] = @T[$cnd] |
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} |
} |
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my ($j,$k,@T) = 0,0, |kmp_table @W; |
return gather loop (my ($j,$k,@T) = 0,0, |kmp_table @W; $j < @S.elems; ) { |
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return gather while $j < @S.elems { |
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if @W[$k] eq @S[$j] { |
if @W[$k] eq @S[$j] { |
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($j, $k)>> |
($j, $k)>>++; |
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if $k == @W.elems { |
if $k == @W.elems { |
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take $j - $k; |
take $j - $k; |
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} |
} |
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} else { |
} else { |
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($j, $k)>> |
($j, $k)>>++ if ($k = @T[$k]) < 0 |
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} |
} |
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} |
} |
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