51 lines
1.4 KiB
Factor
51 lines
1.4 KiB
Factor
! Copyright (C) 2013 Doug Coleman, John Benediktsson.
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! See http://factorcode.org/license.txt for BSD license.
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USING: arrays combinators combinators.smart fry generalizations
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kernel macros math quotations sequences
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sequences.generalizations sequences.private system ;
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IN: combinators.extras
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: once ( quot -- ) call ; inline
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: twice ( quot -- ) dup [ call ] dip call ; inline
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: thrice ( quot -- ) dup dup [ call ] 2dip [ call ] dip call ; inline
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: forever ( quot -- ) [ t ] compose loop ; inline
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MACRO: cond-case ( assoc -- )
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[
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dup callable? not [
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[ first [ dup ] prepose ]
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[ second [ drop ] prepose ] bi 2array
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] when
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] map [ cond ] curry ;
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MACRO: cleave-array ( quots -- )
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[ '[ _ cleave ] ] [ length '[ _ narray ] ] bi compose ;
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: 3bi* ( u v w x y z p q -- )
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[ 3dip ] dip call ; inline
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: 3bi@ ( u v w x y z quot -- )
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dup 3bi* ; inline
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: 4bi ( w x y z p q -- )
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[ 4keep ] dip call ; inline
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: 4tri ( w x y z p q r -- )
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[ [ 4keep ] dip 4keep ] dip call ; inline
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: keepd ( ..a x y quot: ( ..a x y -- ..b ) -- ..b x )
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2keep drop ; inline
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: plox ( ... x/f quot: ( ... x -- ... ) -- ... )
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dupd when ; inline
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MACRO: smart-plox ( true -- )
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[ inputs [ 1 - [ and ] n*quot ] keep ] keep swap
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'[ _ _ [ _ ndrop f ] smart-if ] ;
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: throttle ( quot millis -- quot' )
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1,000,000 * '[
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_ nano-count { 0 } 2dup first-unsafe _ + >=
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[ 0 swap set-nth-unsafe call ] [ 3drop ] if
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] ; inline
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