80 lines
2.3 KiB
Factor
80 lines
2.3 KiB
Factor
! (c)2009 Joe Groff bsd license
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USING: kernel sequences sequences.private math
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combinators macros math.order math.ranges quotations fry effects
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memoize.private generalizations ;
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IN: sequences.generalizations
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MACRO: nmin-length ( n -- )
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dup 1 - [ min ] n*quot
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'[ [ length ] _ napply @ ] ;
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: nnth-unsafe ( n seq... n -- )
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[ nth-unsafe ] swap [ apply-curry ] [ cleave* ] bi ; inline
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MACRO: nset-nth-unsafe ( n -- )
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[ [ drop ] ]
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[ '[ [ set-nth-unsafe ] _ [ apply-curry ] [ cleave-curry ] [ spread* ] tri ] ]
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if-zero ;
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: (neach) ( seq... quot n -- len quot' )
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dup dup dup
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'[ [ _ nmin-length ] _ nkeep [ _ nnth-unsafe ] _ ncurry ] dip compose ; inline
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: neach ( seq... quot n -- )
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(neach) each-integer ; inline
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: nmap-as ( seq... quot exemplar n -- result )
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'[ _ (neach) ] dip map-integers ; inline
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: nmap ( seq... quot n -- result )
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dup '[ [ _ npick ] dip swap ] dip nmap-as ; inline
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MACRO: nnew-sequence ( n -- )
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[ [ drop ] ]
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[ dup '[ [ new-sequence ] _ apply-curry _ cleave* ] ] if-zero ;
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: nnew-like ( len exemplar... quot n -- result... )
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5 dupn '[
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_ nover
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[ [ _ nnew-sequence ] dip call ]
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_ ndip [ like ]
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_ apply-curry
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_ spread*
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] call ; inline
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MACRO: (ncollect) ( n -- )
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3 dupn 1 +
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'[ [ [ keep ] _ ndip _ nset-nth-unsafe ] _ ncurry ] ;
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: ncollect ( len quot into... n -- )
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(ncollect) each-integer ; inline
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: nmap-integers ( len quot exemplar... n -- result... )
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4 dupn
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'[ [ over ] _ ndip [ [ _ ncollect ] _ nkeep ] _ nnew-like ] call ; inline
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: mnmap-as ( m*seq quot n*exemplar m n -- result*n )
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dup '[ [ _ (neach) ] _ ndip _ nmap-integers ] call ; inline
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: mnmap ( m*seq quot m n -- result*n )
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2dup '[ [ _ npick ] dip swap _ dupn ] 2dip mnmap-as ; inline
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: ncollector-for ( quot exemplar... n -- quot' vec... )
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5 dupn '[
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[ [ length ] keep new-resizable ] _ napply
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[ [ [ push ] _ apply-curry _ spread* ] _ ncurry compose ] _ nkeep
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] call ; inline
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: ncollector ( quot n -- quot' vec... )
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[ V{ } swap dupn ] keep ncollector-for ; inline
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: nproduce-as ( pred quot exemplar... n -- seq... )
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7 dupn '[
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_ ndup
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[ _ ncollector-for [ while ] _ ndip ]
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_ ncurry _ ndip
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[ like ] _ apply-curry _ spread*
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] call ; inline
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: nproduce ( pred quot n -- seq... )
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[ { } swap dupn ] keep nproduce-as ; inline
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