Card shuffles: Difference between revisions
→{{header|Raku}}
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(formerly Perl 6)
<lang perl6>
use v6;
sub overhand ( @cards ) {
my @splits = roll 10, ^( @cards.elems div 5 )+1;
@cards.rotor( @splits ,:partial ).reverse.flat
}
sub riffle ( @pile is copy ) {
my @pile2 = @pile.splice: @pile.elems div 2 ;
roundrobin(
@pile.rotor( (1 .. 3).roll(7), :partial ),
@pile2.rotor( (1 .. 3).roll(9), :partial ),
).flat
}
my @cards = ^20;
@cards.=&overhand for ^10;
say @cards;
my @cards2 = ^20;
@cards2.=&riffle for ^10;
say @cards2;
say (^20).pick(*);
</lang>
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