1 USING: accessors arrays assocs fry grouping growable kernel
2 locals make math math.order math.ranges sequences
3 sequences.deep sequences.private sorting splitting ;
4 FROM: sequences => change-nth ;
7 : reduce1 ( seq quot -- result ) [ unclip ] dip reduce ; inline
9 :: reduce-r ( list identity quot: ( obj1 obj2 -- obj ) -- result )
12 [ list rest identity quot reduce-r list first quot call ] if ;
15 ! Quot must have static stack effect, unlike "reduce"
16 :: reduce* ( seq id quot -- result ) seq
18 [ unclip id swap quot call( prev elt -- next ) quot reduce* ] if-empty ; inline recursive
20 :: combos ( list1 list2 -- result )
21 list2 [ [ 2array ] curry list1 swap map ] map concat ;
23 : find-all ( seq quot -- elts )
24 [ [ length iota ] keep ] dip
25 [ dupd call( a -- ? ) [ 2array ] [ 2drop f ] if ] curry
26 2map [ ] filter ; inline
28 : insert-sorted ( elt seq -- seq )
29 2dup [ < ] with find drop over length or swap insert-nth ;
31 : reduce-from ( ... seq identity quot: ( ... prev elt -- ... next ) i -- ... result )
32 [ swap ] 2dip each-from ; inline
34 : all-subseqs ( seq -- seqs )
35 dup length [1,b] [ clump ] with map concat ;
37 :: each-subseq ( ... seq quot: ( ... x -- ... ) -- ... )
43 from to seq subseq quot call( x -- )
47 : map-like ( seq exemplar -- seq' )
48 '[ _ like ] map ; inline
50 : filter-all-subseqs-range ( ... seq range quot: ( ... x -- ... ) -- seq )
52 '[ <clumps> _ filter ] with map concat
53 ] 3keep 2drop map-like ; inline
55 : filter-all-subseqs ( ... seq quot: ( ... x -- ... ) -- seq )
56 [ dup length [1,b] ] dip filter-all-subseqs-range ; inline
58 :: longest-subseq ( seq1 seq2 -- subseq )
63 len1 1 + [ len2 1 + 0 <array> ] replicate :> table
67 y 1 - seq2 nth-unsafe = [
68 y 1 - x 1 - table nth-unsafe nth-unsafe 1 + :> len
69 len y x table nth-unsafe set-nth-unsafe
70 len n > [ len n! x end! ] when
71 ] [ 0 y x table nth-unsafe set-nth-unsafe ] if
73 ] each end n - end seq1 subseq ;
75 : pad-longest ( seq1 seq2 elt -- seq1 seq2 )
76 [ 2dup max-length ] dip [ pad-tail ] 2curry bi@ ;
78 : change-nths ( ... indices seq quot: ( ... elt -- ... elt' ) -- ... )
79 [ change-nth ] 2curry each ; inline
81 : push-if-index ( ..a elt i quot: ( ..a elt i -- ..b ? ) accum -- ..b )
82 [ 2keep drop ] dip rot [ push ] [ 2drop ] if ; inline
84 : index-selector-for ( quot exemplar -- selector accum )
85 [ length ] keep new-resizable [ [ push-if-index ] 2curry ] keep ; inline
87 : filter-index-as ( ... seq quot: ( ... elt i -- ... ? ) exemplar -- ... seq' )
88 dup [ index-selector-for [ each-index ] dip ] curry dip like ; inline
90 : filter-index ( ... seq quot: ( ... elt i -- ... ? ) -- ... seq' )
91 over filter-index-as ; inline
93 : even-indices ( seq -- seq' ) [ nip even? ] filter-index ;
95 : odd-indices ( seq -- seq' ) [ nip odd? ] filter-index ;
97 : compact ( seq quot elt -- seq' )
98 [ split-when harvest ] dip join ; inline
100 : collapse ( seq quot elt -- seq' )
102 [ [ harvest ] dip join ]
103 [ [ first empty? ] dip [ prepend ] curry when ]
104 [ [ last empty? ] dip [ append ] curry when ]
107 :: slice-when ( seq quot: ( elt -- ? ) -- seq' )
110 dup seq quot find-from drop
111 [ 2dup = [ 1 + ] when ] [ len ] if*
112 [ seq <slice> ] keep len or swap
113 ] produce nip ; inline
115 : rotate ( seq n -- seq' )
118 :: rotate! ( seq n -- )
119 n seq bounds-check length :> end
121 [ seq exchange-unsafe ] [ [ 1 + ] bi@ ] 2bi
122 dup end = [ drop over ] when
123 2over = [ -rot nip over ] when
126 : all-rotations ( seq -- seq' )
127 dup length iota [ rotate ] with map ;
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 : ((each-from)) ( i seq -- n quot )
165 [ length over [-] swap ] keep '[ _ + _ nth-unsafe ] ; inline
167 : (each-from) ( i seq quot -- n quot' ) [ ((each-from)) ] dip compose ;
172 : map-from-as ( ... seq quot: ( ... elt -- ... newelt ) i exemplar -- ... newseq )
173 [ -rot (each-from) ] dip map-integers ; inline
175 : map-from ( ... seq quot: ( ... elt -- ... newelt ) i -- ... newseq )
176 pick map-from-as ; inline
180 : push-map-if ( ..a elt filter-quot: ( ..a elt -- ..b ? ) map-quot: ( ..a elt -- ..b newelt ) accum -- ..b )
181 [ keep over ] 2dip [ when ] dip rot [ push ] [ 2drop ] if ; inline
183 : filter-mapper-for ( filter-quot map-quot exemplar -- quot' vec )
184 [ length ] keep new-resizable [ [ push-map-if ] 3curry ] keep ; inline
186 : filter-mapper ( filter-quot map-quot -- quot' vec )
187 V{ } filter-mapper-for ; inline
191 : filter-map-as ( ... seq filter-quot: ( ... elt -- ... ? ) map-quot: ( ... elt -- ... newelt ) exemplar -- ... newseq )
192 dup [ filter-mapper-for [ each ] dip ] curry dip like ; inline
194 : filter-map ( ... seq filter-quot: ( ... elt -- ... ? ) map-quot: ( ... elt -- ... newelt ) -- ... newseq )
195 pick filter-map-as ; inline
197 : 2map-sum ( ... seq1 seq2 quot: ( ... elt1 elt2 -- ... n ) -- ... n )
198 [ 0 ] 3dip [ dip + ] curry [ rot ] prepose 2each ; inline
200 : 2count ( ... seq1 seq2 quot: ( ... elt1 elt2 -- ... ? ) -- ... n )
201 [ 1 0 ? ] compose 2map-sum ; inline
203 : round-robin ( seq -- newseq )
205 [ longest length iota ] keep
206 [ [ ?nth ] with map ] curry map concat sift
209 : sift-as ( seq exemplar -- newseq )
212 : sift! ( seq -- newseq )
215 : harvest-as ( seq exemplar -- newseq )
216 [ empty? not ] swap filter-as ;
218 : harvest! ( seq -- newseq )
219 [ empty? not ] filter! ;
221 : contains? ( seq elts -- ? )
222 [ member? ] curry any? ; inline
224 : head-as ( seq n exemplar -- seq' )
225 [ head-slice ] [ like ] bi* ; inline
227 : head*-as ( seq n exemplar -- seq' )
228 [ head-slice* ] [ like ] bi* ; inline
230 : tail-as ( seq n exemplar -- seq' )
231 [ tail-slice ] [ like ] bi* ; inline
233 : tail*-as ( seq n exemplar -- seq' )
234 [ tail-slice* ] [ like ] bi* ; inline
236 : trim-as ( ... seq quot: ( ... elt -- ... ? ) exemplar -- ... newseq )
237 [ trim-slice ] [ like ] bi* ; inline
239 : ?trim ( ... seq quot: ( ... elt -- ... ? ) -- ... seq/newseq )
240 over empty? [ drop ] [
241 over [ first-unsafe ] [ last-unsafe ] bi pick bi@ or
245 : unsurround ( newseq seq2 seq3 -- seq1 )
246 [ ?head drop ] [ ?tail drop ] bi* ;
248 : none? ( ... seq quot: ( ... elt -- ... ? ) -- ... ? )
251 : one? ( ... seq quot: ( ... elt -- ... ? ) -- ... ? )
253 [ 1 + ] 2dip find-from drop not
254 ] [ 3drop f ] if ; inline
256 : map-index! ( ... seq quot: ( ... elt index -- ... newelt ) -- ... seq )
257 over [ [ (each-index) ] dip collect ] keep ; inline
261 : (2each-index) ( seq1 seq2 quot -- n quot' )
262 [ ((2each)) [ keep ] curry ] dip compose ; inline
266 : 2each-index ( ... seq1 seq2 quot: ( ... elt1 elt2 index -- ... ) -- ... )
267 (2each-index) each-integer ; inline
269 : 2map-into ( seq1 seq2 quot into -- )
270 [ (2each) ] dip collect ; inline
272 : 2map! ( ... seq1 seq2 quot: ( ... elt1 elt2 -- ... newelt ) -- ... seq1 )
273 pick [ 2map-into ] keep ; inline
275 : 2map-index ( ... seq1 seq2 quot: ( ... elt1 elt2 index -- ... newelt ) -- ... newseq )
276 pick [ (2each-index) ] dip map-integers ; inline
278 TUPLE: evens seq length ;
280 : <evens> ( seq -- evens )
281 dup length 1 + 2/ evens boa ; inline
283 M: evens length length>> ; inline
285 M: evens nth-unsafe [ 2 * ] [ seq>> nth-unsafe ] bi* ; inline
287 INSTANCE: evens immutable-sequence
289 TUPLE: odds seq length ;
291 : <odds> ( seq -- odds )
292 dup length 2/ odds boa ; inline
294 M: odds length length>> ; inline
296 M: odds nth-unsafe [ 2 * 1 + ] [ seq>> nth-unsafe ] bi* ; inline
298 INSTANCE: odds immutable-sequence
300 : until-empty ( seq quot -- )
301 [ dup empty? ] swap until drop ; inline
303 : arg-max ( seq -- n )
304 dup length iota zip [ first-unsafe ] supremum-by second ;
306 : arg-min ( seq -- n )
307 dup length iota zip [ first-unsafe ] infimum-by second ;
309 : arg-where ( ... seq quot: ( ... elt -- ... ? ) -- ... indices )
310 [ dup length iota zip ] dip
311 [ first-unsafe ] prepose filter values ; inline
313 : arg-sort ( seq -- indices )
314 dup length iota zip sort-keys values ;
316 : first= ( seq elt -- ? ) [ first ] dip = ; inline
317 : second= ( seq elt -- ? ) [ second ] dip = ; inline
318 : third= ( seq elt -- ? ) [ third ] dip = ; inline
319 : fourth= ( seq elt -- ? ) [ fourth ] dip = ; inline
320 : last= ( seq elt -- ? ) [ last ] dip = ; inline
321 : nth= ( n seq elt -- ? ) [ nth ] dip = ; inline
323 : first? ( seq quot -- ? ) [ first ] dip call ; inline
324 : second? ( seq quot -- ? ) [ second ] dip call ; inline
325 : third? ( seq quot -- ? ) [ third ] dip call ; inline
326 : fourth? ( seq quot -- ? ) [ fourth ] dip call ; inline
327 : last? ( seq quot -- ? ) [ last ] dip call ; inline
328 : nth? ( n seq quot -- ? ) [ nth ] dip call ; inline
330 : loop>sequence ( quot exemplar -- seq )
331 [ '[ [ @ [ [ , ] when* ] keep ] loop ] ] dip make ; inline
333 : loop>array ( quot -- seq )
334 { } loop>sequence ; inline
338 : (reverse) ( seq -- newseq )
339 dup [ length ] keep new-sequence [ 0 swap copy ] keep reverse! ;
343 : reverse-as ( seq exemplar -- newseq )
344 [ (reverse) ] [ like ] bi* ;
346 : map-product ( ... seq quot: ( ... elt -- ... n ) -- ... n )
347 [ 1 ] 2dip [ dip * ] curry [ swap ] prepose each ; inline
349 : insert-nth! ( elt n seq -- )
350 [ length ] keep ensure swap pick (a,b]
351 over '[ [ 1 + ] keep _ move-unsafe ] each
354 : set-nths ( value indices seq -- )
355 swapd '[ [ _ ] dip _ set-nth ] each ; inline
357 : set-nths-unsafe ( value indices seq -- )
358 swapd '[ [ _ ] dip _ set-nth-unsafe ] each ; inline
360 : flatten1 ( obj -- seq )
364 [ dup branch? [ % ] [ , ] if ] each
367 ] keep dup branch? [ drop f ] unless make ;