1 USING: arrays grouping kernel locals math math.order math.ranges
2 sequences sequences.private splitting ;
6 : reduce1 ( seq quot -- result ) [ unclip ] dip reduce ; inline
8 :: reduce-r ( list identity quot: ( obj1 obj2 -- obj ) -- result )
11 [ list rest identity quot reduce-r list first quot call ] if ;
14 ! Quot must have static stack effect, unlike "reduce"
15 :: reduce* ( seq id quot -- result ) seq
17 [ unclip id swap quot call( prev elt -- next ) quot reduce* ] if-empty ; inline recursive
19 :: combos ( list1 list2 -- result )
20 list2 [ [ 2array ] curry list1 swap map ] map concat ;
22 : find-all ( seq quot -- elts )
23 [ [ length iota ] keep ] dip
24 [ dupd call( a -- ? ) [ 2array ] [ 2drop f ] if ] curry
25 2map [ ] filter ; inline
27 : insert-sorted ( elt seq -- seq )
28 2dup [ < ] with find drop over length or swap insert-nth ;
30 : each-from ( ... seq quot: ( ... x -- ... ) i -- ... )
31 -rot (each) (each-integer) ; inline
33 : reduce-from ( ... seq identity quot: ( ... prev elt -- ... next ) i -- ... result )
34 [ swap ] 2dip each-from ; inline
36 : supremum-by ( seq quot: ( ... elt -- ... x ) -- elt )
37 [ [ first dup ] dip call ] 2keep [
38 dupd call pick dupd max over =
39 [ [ 2drop ] 2dip ] [ 2drop ] if
40 ] curry 1 each-from drop ; inline
42 : infimum-by ( seq quot: ( ... elt -- ... x ) -- elt )
43 [ [ first dup ] dip call ] 2keep [
44 dupd call pick dupd min over =
45 [ [ 2drop ] 2dip ] [ 2drop ] if
46 ] curry 1 each-from drop ; inline
48 : all-subseqs ( seq -- seqs )
49 dup length [1,b] [ <clumps> ] with map concat ;
51 :: each-subseq ( ... seq quot: ( ... x -- ... ) -- ... )
57 from to seq subseq quot call( x -- )
61 :: longest-subseq ( seq1 seq2 -- subseq )
66 len1 1 + [ len2 1 + 0 <array> ] replicate :> table
70 y 1 - seq2 nth-unsafe = [
71 y 1 - x 1 - table nth-unsafe nth-unsafe 1 + :> len
72 len y x table nth-unsafe set-nth-unsafe
73 len n > [ len n! x end! ] when
74 ] [ 0 y x table nth-unsafe set-nth-unsafe ] if
76 ] each end n - end seq1 subseq ;
78 : pad-longest ( seq1 seq2 elt -- seq1 seq2 )
79 [ 2dup max-length ] dip [ pad-tail ] 2curry bi@ ;
81 : change-nths ( ... indices seq quot: ( ... elt -- ... elt' ) -- ... )
82 [ change-nth ] 2curry each ; inline
84 : push-if-index ( ..a elt i quot: ( ..a elt i -- ..b ? ) accum -- ..b )
85 [ 2keep drop ] dip rot [ push ] [ 2drop ] if ; inline
87 : index-selector-for ( quot exemplar -- selector accum )
88 [ length ] keep new-resizable [ [ push-if-index ] 2curry ] keep ; inline
90 : filter-index-as ( ... seq quot: ( ... elt i -- ... ? ) exemplar -- ... seq' )
91 dup [ index-selector-for [ each-index ] dip ] curry dip like ; inline
93 : filter-index ( ... seq quot: ( ... elt i -- ... ? ) -- ... seq' )
94 over filter-index-as ; inline
96 : even-indices ( seq -- seq' ) [ nip even? ] filter-index ;
98 : odd-indices ( seq -- seq' ) [ nip odd? ] filter-index ;
100 : compact ( seq quot elt -- seq' )
101 [ split-when harvest ] dip join ; inline
103 : collapse ( seq quot elt -- seq' )
105 [ [ harvest ] dip join ]
106 [ [ first empty? ] dip [ prepend ] curry when ]
107 [ [ last empty? ] dip [ append ] curry when ]
110 :: slice-when ( seq quot: ( elt -- ? ) -- seq' )
113 dup seq quot find-from drop
114 [ 2dup = [ 1 + ] when ] [ len ] if*
115 [ seq <slice> ] keep len or swap
116 ] produce nip ; inline
118 : rotate ( seq n -- seq' )
121 :: rotate! ( seq n -- )
122 n seq bounds-check length :> end
124 [ seq exchange-unsafe ] [ [ 1 + ] bi@ ] 2bi
125 dup end = [ drop over ] when
126 2over = [ -rot nip over ] when
129 : appender-for ( quot exemplar -- quot' vec )
130 [ length ] keep new-resizable
131 [ [ push-all ] curry compose ] keep ; inline
133 : appender ( quot -- quot' vec )
134 V{ } appender-for ; inline
136 : map-concat-as ( ... seq quot: ( ... elt -- ... newelt ) exemplar -- ... newseq )
137 dup [ appender-for [ each ] dip ] curry dip like ; inline
139 : >resizable ( seq -- vec ) ! fixes map-concat "cannot apply call to run-time..."
140 [ length ] keep [ new-resizable ] [ over push-all ] bi ;
142 : map-concat ( ... seq quot: ( ... elt -- ... newelt ) -- ... newseq )
144 first over call dup [
145 >resizable [ [ push-all ] curry compose ] keep
146 [ 1 ] 3dip [ (each) (each-integer) ] dip
150 : map-filter-as ( ... seq map-quot: ( ... elt -- ... newelt ) filter-quot: ( ... newelt -- ... ? ) exemplar -- ... subseq )
151 dup [ selector-for [ compose each ] dip ] curry dip like ; inline
153 : map-filter ( ... seq map-quot: ( ... elt -- ... newelt ) filter-quot: ( ... newelt -- ... ? ) -- ... subseq )
154 pick map-filter-as ; inline
156 : map-sift ( ... seq quot: ( ... elt -- ... newelt ) -- ... newseq )
157 [ ] map-filter ; inline
159 : map-harvest ( ... seq quot: ( ... elt -- ... newelt ) -- ... newseq )
160 [ empty? not ] map-filter ; inline
164 : push-map-if ( ..a elt filter-quot: ( ..a elt -- ..b ? ) map-quot: ( ..a elt -- ..b newelt ) accum -- ..b )
165 [ keep over ] 2dip [ when ] dip rot [ push ] [ 2drop ] if ; inline
167 : filter-mapper-for ( filter-quot map-quot exemplar -- quot' vec )
168 [ length ] keep new-resizable [ [ push-map-if ] 3curry ] keep ; inline
170 : filter-mapper ( filter-quot map-quot -- quot' vec )
171 V{ } filter-mapper-for ; inline
175 : filter-map-as ( ... seq filter-quot: ( ... elt -- ... ? ) map-quot: ( ... elt -- ... newelt ) exemplar -- ... newseq )
176 dup [ filter-mapper-for [ each ] dip ] curry dip like ; inline
178 : filter-map ( ... seq filter-quot: ( ... elt -- ... ? ) map-quot: ( ... elt -- ... newelt ) -- ... newseq )
179 pick filter-map-as ; inline
181 : 2map-sum ( ... seq1 seq2 quot: ( ... elt1 elt2 -- ... n ) -- ... n )
182 [ 0 ] 3dip [ dip + ] curry [ rot ] prepose 2each ; inline
184 : 2count ( ... seq1 seq2 quot: ( ... elt1 elt2 -- ... ? ) -- ... n )
185 [ 1 0 ? ] compose 2map-sum ; inline
187 : round-robin ( seq -- newseq )
189 [ [ length ] [ max ] map-reduce iota ] keep
190 [ [ ?nth ] with map ] curry map concat sift
193 : sift-as ( seq exemplar -- newseq )
196 : harvest-as ( seq exemplar -- newseq )
197 [ empty? not ] swap filter-as ;
199 : contains? ( seq elts -- ? )
200 [ member? ] curry any? ; inline
202 : trim-as ( ... seq quot: ( ... elt -- ... ? ) exemplar -- ... newseq )
203 [ trim-slice ] [ like ] bi* ; inline
207 : last-unsafe ( seq -- elt ) [ length 1 - ] [ nth-unsafe ] bi ;
211 : ?trim ( ... seq quot: ( ... elt -- ... ? ) -- ... seq/newseq )
212 over empty? [ drop ] [
213 over [ first-unsafe ] [ last-unsafe ] bi pick bi@ or
217 : unsurround ( newseq seq2 seq3 -- seq1 )
218 [ ?head drop ] [ ?tail drop ] bi* ;
220 : none? ( ... seq quot: ( ... elt -- ... ? ) -- ... ? )
223 : one? ( ... seq quot: ( ... elt -- ... ? ) -- ... ? )
225 [ 1 + ] 2dip find-from drop not
226 ] [ 3drop f ] if ; inline