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 vectors ;
4 FROM: sequences => change-nth ;
7 : reduce1 ( seq quot -- result ) [ unclip ] dip reduce ; inline
9 :: reduce-r ( seq identity quot: ( obj1 obj2 -- obj ) -- result )
11 unclip [ identity quot reduce-r ] [ quot call ] bi*
12 ] if-empty ; inline recursive
14 ! Quot must have static stack effect, unlike "reduce"
15 :: reduce* ( seq identity quot: ( prev elt -- next ) -- result )
17 unclip identity swap quot call( prev elt -- next )
19 ] if-empty ; inline recursive
21 :: combos ( list1 list2 -- result )
22 list2 [ [ 2array ] curry list1 swap map ] map concat ;
24 : find-all ( seq quot: ( elt -- ? ) -- elts )
25 [ [ length iota ] keep ] dip
26 [ dupd call( a -- ? ) [ 2array ] [ 2drop f ] if ] curry
27 2map [ ] filter ; inline
29 : insert-sorted ( elt seq -- seq )
30 2dup [ < ] with find drop over length or swap insert-nth ;
32 : reduce-from ( ... seq identity quot: ( ... prev elt -- ... next ) i -- ... result )
33 [ swap ] 2dip each-from ; inline
35 :: subseq* ( from to seq -- subseq )
37 from [ dup 0 < [ len + ] when ] [ 0 ] if*
38 to [ dup 0 < [ len + ] when ] [ len ] if*
39 [ 0 len clamp ] bi@ dupd max seq subseq ;
41 : safe-subseq ( from to seq -- subseq )
42 [ length '[ 0 _ clamp ] bi@ ] keep subseq ;
44 : all-subseqs ( seq -- seqs )
45 dup length [1,b] [ clump ] with map concat ;
47 :: each-subseq ( ... seq quot: ( ... x -- ... ) -- ... )
53 from to seq subseq quot call
57 : subseq-as ( from to seq exemplar -- subseq )
58 [ check-slice subseq>copy (copy) ] dip like ;
60 : map-like ( seq exemplar -- seq' )
61 '[ _ like ] map ; inline
63 : filter-all-subseqs-range ( ... seq range quot: ( ... x -- ... ) -- seq )
65 '[ <clumps> _ filter ] with map concat
66 ] 3keep 2drop map-like ; inline
68 : filter-all-subseqs ( ... seq quot: ( ... x -- ... ) -- seq )
69 [ dup length [1,b] ] dip filter-all-subseqs-range ; inline
71 :: longest-subseq ( seq1 seq2 -- subseq )
76 len1 1 + [ len2 1 + 0 <array> ] replicate :> table
80 y 1 - seq2 nth-unsafe = [
81 y 1 - x 1 - table nth-unsafe nth-unsafe 1 + :> len
82 len y x table nth-unsafe set-nth-unsafe
83 len n > [ len n! x end! ] when
84 ] [ 0 y x table nth-unsafe set-nth-unsafe ] if
86 ] each end n - end seq1 subseq ;
88 : pad-longest ( seq1 seq2 elt -- seq1 seq2 )
89 [ 2dup max-length ] dip [ pad-tail ] 2curry bi@ ;
91 : change-nths ( ... indices seq quot: ( ... elt -- ... elt' ) -- ... )
92 [ change-nth ] 2curry each ; inline
94 : push-if-index ( ..a elt i quot: ( ..a elt i -- ..b ? ) accum -- ..b )
95 [ 2keep drop ] dip rot [ push ] [ 2drop ] if ; inline
99 : (index-selector-for) ( quot length exampler -- selector accum )
100 new-resizable [ [ push-if-index ] 2curry ] keep ; inline
104 : index-selector-for ( quot exemplar -- selector accum )
105 [ length ] keep (index-selector-for) ; inline
107 : index-selector ( quot -- selector accum )
108 V{ } index-selector-for ; inline
110 : filter-index-as ( ... seq quot: ( ... elt i -- ... ? ) exemplar -- ... seq' )
111 pick length over [ (index-selector-for) [ each-index ] dip ] 2curry dip like ; inline
113 : filter-index ( ... seq quot: ( ... elt i -- ... ? ) -- ... seq' )
114 over filter-index-as ; inline
116 : even-indices ( seq -- seq' )
117 [ length 1 + 2/ ] keep [
118 [ [ 2 * ] dip nth-unsafe ] curry
119 ] keep map-integers ;
121 : odd-indices ( seq -- seq' )
123 [ [ 2 * 1 + ] dip nth-unsafe ] curry
124 ] keep map-integers ;
126 : compact ( ... seq quot: ( ... elt -- ... ? ) elt -- ... seq' )
127 [ split-when harvest ] dip join ; inline
129 : collapse ( ... seq quot: ( ... elt -- ... ? ) elt -- ... seq' )
131 [ [ harvest ] dip join ]
132 [ [ first empty? ] dip [ prepend ] curry when ]
133 [ [ last empty? ] dip [ append ] curry when ]
136 :: slice-when ( seq quot: ( elt -- ? ) -- seq' )
139 dup seq quot find-from drop
140 [ 2dup = [ 1 + ] when ] [ len ] if*
141 [ seq <slice> ] keep len or swap
142 ] produce nip ; inline
144 : cut-slice* ( seq n -- before after )
145 [ head-slice* ] [ tail-slice* ] 2bi ;
147 : rotate ( seq n -- seq' )
150 :: rotate! ( seq n -- )
151 n seq bounds-check length :> end
153 [ seq exchange-unsafe ] [ [ 1 + ] bi@ ] 2bi
154 dup end = [ drop over ] when
155 2over = [ -rot nip over ] when
158 : all-rotations ( seq -- seq' )
159 dup length iota [ rotate ] with map ;
163 : (appender-for) ( quot length exemplar -- appender accum )
164 new-resizable [ [ push-all ] curry compose ] keep ; inline
168 : appender-for ( quot exemplar -- appender accum )
169 [ length ] keep (appender-for) ; inline
171 : appender ( quot -- appender accum )
172 V{ } appender-for ; inline
174 : map-concat-as ( ... seq quot: ( ... elt -- ... newelt ) exemplar -- ... newseq )
175 [ appender-for [ each ] dip ] keep like ; inline
177 : >resizable ( seq -- accum ) ! fixes map-concat "cannot apply call to run-time..."
178 [ length ] keep [ new-resizable ] [ over push-all ] bi ;
180 : map-concat ( ... seq quot: ( ... elt -- ... newelt ) -- ... newseq )
181 over empty? [ 2drop { } ] [
182 [ [ first ] dip call ] 2keep rot dup [
183 >resizable [ [ push-all ] curry compose ] keep
184 [ 1 ] 3dip [ (each) (each-integer) ] dip
188 : map-filter-as ( ... seq map-quot: ( ... elt -- ... newelt ) filter-quot: ( ... newelt -- ... ? ) exemplar -- ... subseq )
189 [ pick ] dip swap length over
190 [ (selector-for) [ compose each ] dip ] 2curry dip like ; inline
192 : map-filter ( ... seq map-quot: ( ... elt -- ... newelt ) filter-quot: ( ... newelt -- ... ? ) -- ... subseq )
193 pick map-filter-as ; inline
195 : map-sift ( ... seq quot: ( ... elt -- ... newelt ) -- ... newseq )
196 [ ] map-filter ; inline
198 : map-harvest ( ... seq quot: ( ... elt -- ... newelt ) -- ... newseq )
199 [ empty? not ] map-filter ; inline
203 : ((each-from)) ( i seq -- n quot )
204 [ length over [-] swap ] keep '[ _ + _ nth-unsafe ] ; inline
206 : (each-from) ( i seq quot -- n quot' ) [ ((each-from)) ] dip compose ;
211 : map-from-as ( ... seq quot: ( ... elt -- ... newelt ) i exemplar -- ... newseq )
212 [ -rot (each-from) ] dip map-integers ; inline
214 : map-from ( ... seq quot: ( ... elt -- ... newelt ) i -- ... newseq )
215 pick map-from-as ; inline
219 : push-map-if ( ..a elt filter-quot: ( ..a elt -- ..b ? ) map-quot: ( ..a elt -- ..b newelt ) accum -- ..b )
220 [ keep over ] 2dip [ when ] dip rot [ push ] [ 2drop ] if ; inline
222 : (filter-mapper-for) ( filter-quot map-quot length exempler -- filter-mapper accum )
223 new-resizable [ [ push-map-if ] 3curry ] keep ; inline
225 : filter-mapper-for ( filter-quot map-quot exemplar -- filter-mapper accum )
226 [ length ] keep (filter-mapper-for) ; inline
228 : filter-mapper ( filter-quot map-quot -- filter-mapper accum )
229 V{ } filter-mapper-for ; inline
233 : filter-map-as ( ... seq filter-quot: ( ... elt -- ... ? ) map-quot: ( ... elt -- ... newelt ) exemplar -- ... newseq )
234 [ pick ] dip swap length over
235 [ (filter-mapper-for) [ each ] dip ] 2curry dip like ; inline
237 : filter-map ( ... seq filter-quot: ( ... elt -- ... ? ) map-quot: ( ... elt -- ... newelt ) -- ... newseq )
238 pick filter-map-as ; inline
240 : 2map-sum ( ... seq1 seq2 quot: ( ... elt1 elt2 -- ... n ) -- ... n )
241 [ 0 ] 3dip [ dip + ] curry [ rot ] prepose 2each ; inline
243 : 2count ( ... seq1 seq2 quot: ( ... elt1 elt2 -- ... ? ) -- ... n )
244 [ 1 0 ? ] compose 2map-sum ; inline
246 : round-robin ( seq -- newseq )
248 [ longest length iota ] keep
249 [ [ ?nth ] with map ] curry map concat sift
252 : sift-as ( seq exemplar -- newseq )
255 : sift! ( seq -- newseq )
258 : harvest-as ( seq exemplar -- newseq )
259 [ empty? not ] swap filter-as ;
261 : harvest! ( seq -- newseq )
262 [ empty? not ] filter! ;
264 : contains? ( seq elts -- ? )
265 [ member? ] curry any? ; inline
267 : head-as ( seq n exemplar -- seq' )
268 [ head-slice ] [ like ] bi* ; inline
270 : head*-as ( seq n exemplar -- seq' )
271 [ head-slice* ] [ like ] bi* ; inline
273 : tail-as ( seq n exemplar -- seq' )
274 [ tail-slice ] [ like ] bi* ; inline
276 : tail*-as ( seq n exemplar -- seq' )
277 [ tail-slice* ] [ like ] bi* ; inline
279 : trim-as ( ... seq quot: ( ... elt -- ... ? ) exemplar -- ... newseq )
280 [ trim-slice ] [ like ] bi* ; inline
282 : ?trim ( seq quot: ( elt -- ? ) -- seq/newseq )
283 over empty? [ drop ] [
284 over [ first-unsafe ] [ last-unsafe ] bi pick bi@ or
288 : ?trim-head ( seq quot: ( elt -- ? ) -- seq/newseq )
289 over empty? [ drop ] [
290 over first-unsafe over call
291 [ trim-head ] [ drop ] if
294 : ?trim-tail ( seq quot: ( elt -- ? ) -- seq/newseq )
295 over empty? [ drop ] [
296 over last-unsafe over call
297 [ trim-tail ] [ drop ] if
300 : unsurround ( newseq seq2 seq3 -- seq1 )
301 [ ?head drop ] [ ?tail drop ] bi* ;
303 : none? ( ... seq quot: ( ... elt -- ... ? ) -- ... ? )
306 : one? ( ... seq quot: ( ... elt -- ... ? ) -- ... ? )
308 [ 1 + ] 2dip find-from drop not
309 ] [ 3drop f ] if ; inline
311 : map-index! ( ... seq quot: ( ... elt index -- ... newelt ) -- ... seq )
312 over [ [ (each-index) ] dip collect ] keep ; inline
316 : (2each-index) ( seq1 seq2 quot -- n quot' )
317 [ ((2each)) [ keep ] curry ] dip compose ; inline
321 : 2each-index ( ... seq1 seq2 quot: ( ... elt1 elt2 index -- ... ) -- ... )
322 (2each-index) each-integer ; inline
324 : 2map-into ( seq1 seq2 quot into -- )
325 [ (2each) ] dip collect ; inline
327 : 2map! ( ... seq1 seq2 quot: ( ... elt1 elt2 -- ... newelt ) -- ... seq1 )
328 pick [ 2map-into ] keep ; inline
330 : 2map-index ( ... seq1 seq2 quot: ( ... elt1 elt2 index -- ... newelt ) -- ... newseq )
331 pick [ (2each-index) ] dip map-integers ; inline
333 TUPLE: evens seq length ;
335 : <evens> ( seq -- evens )
336 dup length 1 + 2/ evens boa ; inline
338 M: evens length length>> ; inline
340 M: evens nth-unsafe [ 2 * ] [ seq>> nth-unsafe ] bi* ; inline
342 INSTANCE: evens immutable-sequence
344 TUPLE: odds seq length ;
346 : <odds> ( seq -- odds )
347 dup length 2/ odds boa ; inline
349 M: odds length length>> ; inline
351 M: odds nth-unsafe [ 2 * 1 + ] [ seq>> nth-unsafe ] bi* ; inline
353 INSTANCE: odds immutable-sequence
355 : until-empty ( seq quot -- )
356 [ dup empty? ] swap until drop ; inline
358 : arg-max ( seq -- n )
359 <enum> [ second-unsafe ] supremum-by first ;
361 : arg-min ( seq -- n )
362 <enum> [ second-unsafe ] infimum-by first ;
366 : push-index-if ( ..a elt i quot: ( ..a elt -- ..b ? ) accum -- ..b )
367 [ dip ] dip rot [ push ] [ 2drop ] if ; inline
371 : arg-where ( ... seq quot: ( ... elt -- ... ? ) -- ... indices )
372 over length <vector> [
373 [ push-index-if ] 2curry each-index
376 : arg-sort ( seq -- indices )
377 dup length iota zip sort-keys values ;
379 : first= ( seq elt -- ? ) [ first ] dip = ; inline
380 : second= ( seq elt -- ? ) [ second ] dip = ; inline
381 : third= ( seq elt -- ? ) [ third ] dip = ; inline
382 : fourth= ( seq elt -- ? ) [ fourth ] dip = ; inline
383 : last= ( seq elt -- ? ) [ last ] dip = ; inline
384 : nth= ( n seq elt -- ? ) [ nth ] dip = ; inline
386 : first? ( seq quot -- ? ) [ first ] dip call ; inline
387 : second? ( seq quot -- ? ) [ second ] dip call ; inline
388 : third? ( seq quot -- ? ) [ third ] dip call ; inline
389 : fourth? ( seq quot -- ? ) [ fourth ] dip call ; inline
390 : last? ( seq quot -- ? ) [ last ] dip call ; inline
391 : nth? ( n seq quot -- ? ) [ nth ] dip call ; inline
393 : loop>sequence ( quot exemplar -- seq )
394 [ '[ [ @ [ [ , ] when* ] keep ] loop ] ] dip make ; inline
396 : loop>array ( quot -- seq )
397 { } loop>sequence ; inline
401 : (reverse) ( seq -- newseq )
402 dup [ length ] keep new-sequence
403 [ 0 swap copy-unsafe ] keep reverse! ;
407 : reverse-as ( seq exemplar -- newseq )
408 [ (reverse) ] [ like ] bi* ;
410 : map-product ( ... seq quot: ( ... elt -- ... n ) -- ... n )
411 [ 1 ] 2dip [ dip * ] curry [ swap ] prepose each ; inline
413 : insert-nth! ( elt n seq -- )
414 [ length ] keep ensure swap pick (a,b]
415 over '[ [ 1 + ] keep _ move-unsafe ] each
418 : set-nths ( value indices seq -- )
419 swapd '[ [ _ ] dip _ set-nth ] each ; inline
421 : set-nths-unsafe ( value indices seq -- )
422 swapd '[ [ _ ] dip _ set-nth-unsafe ] each ; inline
424 : flatten1 ( obj -- seq )
428 [ dup branch? [ % ] [ , ] if ] each
431 ] keep dup branch? [ drop f ] unless make ;
435 : (map-find-index) ( seq quot find-quot -- result elt index )
436 [ [ f ] 2dip [ [ nip ] 2dip call dup ] curry ] dip call
437 [ [ [ drop f ] unless ] keep ] dip ; inline
441 : map-find-index ( ... seq quot: ( ... elt index -- ... result/f ) -- ... result elt index )
442 [ find-index ] (map-find-index) ; inline
444 : filter-length ( seq n -- seq' ) '[ length _ = ] filter ;
446 : all-shortest ( seqs -- seqs' ) dup shortest length filter-length ;
448 : all-longest ( seqs -- seqs' ) dup longest length filter-length ;
450 : remove-first ( obj seq -- seq' )
451 [ index ] keep over [ remove-nth ] [ nip ] if ;
453 : remove-first! ( obj seq -- seq )
454 [ index ] keep over [ remove-nth! ] [ nip ] if ;
456 : remove-last ( obj seq -- seq' )
457 [ last-index ] keep over [ remove-nth ] [ nip ] if ;
459 : remove-last! ( obj seq -- seq )
460 [ last-index ] keep over [ remove-nth! ] [ nip ] if ;