14 lines
586 B
Factor
14 lines
586 B
Factor
USING: help.syntax help.markup ;
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IN: shufflers
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HELP: SHUFFLE:
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{ $syntax "SHUFFLE: alphabet #" }
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{ $values { "alphabet" "an alphabet of unique letters" } { "#" "the maximum length" } }
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{ $description "Defines stack shufflers of the form abc-bcba where 'abc' describes the inputs and 'bcba' describes the outputs. Given a stack of 1 2 3, this returns 2 3 2 1. The stack shufflers defined are put in the current vocab with the suffix '.shuffle' appended." }
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{ $examples
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"SHUFFLE: abcd 6\n"
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": 4drop abcd- ;\n"
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": 2over abcd-abcdab ;\n"
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": 2swap abcd-cdab ;\n"
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": 3dup abc-abcabc ;\n" } ;
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