34 lines
969 B
Factor
34 lines
969 B
Factor
! Copyright (C) 2007 Chris Double, Doug Coleman.
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! See http://factorcode.org/license.txt for BSD license.
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USING: accessors assocs combinators effects.parser
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generalizations sequences.generalizations hashtables kernel
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locals locals.backend macros make math parser sequences ;
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IN: shuffle
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<PRIVATE
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: >index-assoc ( sequence -- assoc )
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dup length iota zip >hashtable ;
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PRIVATE>
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MACRO: shuffle-effect ( effect -- )
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[ out>> ] [ in>> >index-assoc ] bi
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[
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[ nip assoc-size , \ narray , ]
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[ [ at \ swap \ nth [ ] 3sequence ] curry map , \ cleave , ] 2bi
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] [ ] make ;
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SYNTAX: shuffle(
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")" parse-effect suffix! \ shuffle-effect suffix! ;
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: tuck ( x y -- y x y ) swap over ; inline deprecated
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: spin ( x y z -- z y x ) swap rot ; inline deprecated
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: roll ( x y z t -- y z t x ) [ rot ] dip swap ; inline deprecated
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: -roll ( x y z t -- t x y z ) swap [ -rot ] dip ; inline deprecated
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: 2swap ( x y z t -- z t x y ) 2 2 mnswap ; inline
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