Card shuffles: Difference between revisions
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<pre>%1 = [1, 2, 3, 21, 4, 22, 23, 5, 24, 25, 26, 6, 27, 28, 29, 30, 7, 31, 32, 33, 34, 35, 36, 8, 37, 38, 39, 40, 9, 10, 11, 12, 41, 42, 43, 13, 44, 45, 14, 46, 47, 48, 15, 16, 17, 49, 50, 18, 51, 19, 20, 52] |
<pre>%1 = [1, 2, 3, 21, 4, 22, 23, 5, 24, 25, 26, 6, 27, 28, 29, 30, 7, 31, 32, 33, 34, 35, 36, 8, 37, 38, 39, 40, 9, 10, 11, 12, 41, 42, 43, 13, 44, 45, 14, 46, 47, 48, 15, 16, 17, 49, 50, 18, 51, 19, 20, 52] |
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%2 = [44, 45, 46, 47, 48, 49, 50, 51, 52, 43, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 23, 24, 25, 26, 27, 28, 29, 30, 31, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 1, 2, 3, 4]</pre> |
%2 = [44, 45, 46, 47, 48, 49, 50, 51, 52, 43, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 23, 24, 25, 26, 27, 28, 29, 30, 31, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 1, 2, 3, 4]</pre> |
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=={{header|Perl 6}}== |
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<lang perl6>use v6; |
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sub overhand ( @cards ) { |
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my @splits = roll 10, ^( @cards.elems div 5 )+1; |
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@cards.rotor( @splits ,:partial ).reverse.flat |
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} |
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sub riffle ( @pile is copy ) { |
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my @pile2 = @pile.splice: @pile.elems div 2 ; |
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roundrobin( |
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@pile.rotor( (1 .. 3).roll(7), :partial ), |
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@pile2.rotor( (1 .. 3).roll(9), :partial ), |
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).flat |
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} |
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my @cards = ^20; |
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@cards.=&overhand for ^10; |
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say @cards; |
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my @cards2 = ^20; |
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@cards2.=&riffle for ^10; |
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say @cards2; |
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say (^20).pick(*); |
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</lang> |
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=={{header|Racket}}== |
=={{header|Racket}}== |