1 USING: accessors arrays assocs combinators fry generalizations
2 grouping growable kernel locals make math math.order math.ranges
3 sequences sequences.deep sequences.private sorting splitting
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
29 : reduce-from ( ... seq identity quot: ( ... prev elt -- ... next ) i -- ... result )
30 [ swap ] 2dip each-from ; inline
32 :: subseq* ( from to seq -- subseq )
34 from [ dup 0 < [ len + ] when ] [ 0 ] if*
35 to [ dup 0 < [ len + ] when ] [ len ] if*
36 [ 0 len clamp ] bi@ dupd max seq subseq ;
38 : safe-subseq ( from to seq -- subseq )
39 [ length '[ 0 _ clamp ] bi@ ] keep subseq ;
41 : all-subseqs ( seq -- seqs )
42 dup length [1,b] [ clump ] with map concat ;
44 :: each-subseq ( ... seq quot: ( ... x -- ... ) -- ... )
50 from to seq subseq quot call
54 : map-like ( seq exemplar -- seq' )
55 '[ _ like ] map ; inline
57 : filter-all-subseqs-range ( ... seq range quot: ( ... x -- ... ) -- seq )
59 '[ <clumps> _ filter ] with map concat
60 ] 3keep 2drop map-like ; inline
62 : filter-all-subseqs ( ... seq quot: ( ... x -- ... ) -- seq )
63 [ dup length [1,b] ] dip filter-all-subseqs-range ; inline
65 :: longest-subseq ( seq1 seq2 -- subseq )
70 len1 1 + [ len2 1 + 0 <array> ] replicate :> table
74 y 1 - seq2 nth-unsafe = [
75 y 1 - x 1 - table nth-unsafe nth-unsafe 1 + :> len
76 len y x table nth-unsafe set-nth-unsafe
77 len n > [ len n! x end! ] when
78 ] [ 0 y x table nth-unsafe set-nth-unsafe ] if
80 ] each end n - end seq1 subseq ;
82 : pad-longest ( seq1 seq2 elt -- seq1 seq2 )
83 [ 2dup max-length ] dip [ pad-tail ] 2curry bi@ ;
85 :: pad-center ( seq n elt -- padded )
86 n seq length [-] :> extra
89 left elt <repetition> seq right elt <repetition>
92 : change-nths ( ... indices seq quot: ( ... elt -- ... elt' ) -- ... )
93 [ change-nth ] 2curry each ; inline
95 : push-if-index ( ..a elt i quot: ( ..a elt i -- ..b ? ) accum -- ..b )
96 [ 2keep drop ] dip rot [ push ] [ 2drop ] if ; inline
98 : push-if* ( ..a elt quot: ( ..a elt -- ..b obj/f ) accum -- ..b )
99 [ call ] dip [ push ] [ drop ] if* ; inline
103 : (index-selector-as) ( quot length exampler -- selector accum )
104 new-resizable [ [ push-if-index ] 2curry ] keep ; inline
106 : (selector-as*) ( quot length exemplar -- selector accum )
107 new-resizable [ [ push-if* ] 2curry ] keep ; inline
111 : index-selector-as ( quot exemplar -- selector accum )
112 [ length ] keep (index-selector-as) ; inline
114 : index-selector ( quot -- selector accum )
115 V{ } index-selector-as ; inline
117 : selector-as* ( quot exemplar -- selector accum )
118 [ length ] keep (selector-as*) ; inline
120 : selector* ( quot -- selector accum ) V{ } selector-as* ; inline
122 : filter-index-as ( ... seq quot: ( ... elt i -- ... ? ) exemplar -- ... seq' )
123 pick length over [ (index-selector-as) [ each-index ] dip ] 2curry dip like ; inline
125 : filter-index ( ... seq quot: ( ... elt i -- ... ? ) -- ... seq' )
126 over filter-index-as ; inline
128 : even-indices ( seq -- seq' )
129 [ length 1 + 2/ ] keep [
130 [ [ 2 * ] dip nth-unsafe ] curry
131 ] keep map-integers ;
133 : odd-indices ( seq -- seq' )
135 [ [ 2 * 1 + ] dip nth-unsafe ] curry
136 ] keep map-integers ;
138 : compact ( ... seq quot: ( ... elt -- ... ? ) elt -- ... seq' )
139 [ split-when harvest ] dip join ; inline
141 : collapse ( ... seq quot: ( ... elt -- ... ? ) elt -- ... seq' )
143 [ [ harvest ] dip join ]
144 [ [ first empty? ] dip [ prepend ] curry when ]
145 [ [ last empty? ] dip [ append ] curry when ]
148 :: slice-when ( seq quot: ( elt -- ? ) -- seq' )
151 dup seq quot find-from drop
152 [ 2dup = [ 1 + ] when ] [ len ] if*
153 [ seq <slice> ] keep len or swap
154 ] produce nip ; inline
156 : cut-slice* ( seq n -- before after )
157 [ head-slice* ] [ tail-slice* ] 2bi ;
159 : ?<slice> ( from/f to/f sequence -- slice )
160 [ [ 0 ] unless* ] 2dip
161 over [ nip [ length ] [ ] bi ] unless
164 : sequence>slice ( sequence -- slice )
165 [ drop 0 ] [ length ] [ ] tri <slice> ; inline
167 : slice-order-by-from ( slice1 slice2 -- slice-lt slice-gt )
168 2dup [ from>> ] bi@ > [ swap ] when ; inline
170 : ordered-slices-range ( slice-lt slice-gt -- to from )
171 [ to>> ] [ from>> ] bi* ;
173 : unordered-slices-range ( slice1 slice2 -- to from )
174 slice-order-by-from ordered-slices-range ;
176 : ordered-slices-overlap? ( slice-lt slice-gt -- ? )
177 ordered-slices-range > ; inline
179 : unordered-slices-overlap? ( slice1 slice2 -- ? )
180 unordered-slices-range > ; inline
182 : slices-overlap? ( slice1 slice2 -- ? )
183 unordered-slices-overlap? ;
185 : ordered-slices-touch? ( slice-lt slice-gt -- ? )
186 ordered-slices-range >= ; inline
188 : unordered-slices-touch? ( slice1 slice2 -- ? )
189 unordered-slices-range >= ; inline
191 : slices-touch? ( slice1 slice2 -- ? )
192 unordered-slices-touch? ;
194 ERROR: slices-don't-touch slice1 slice2 ;
196 : merge-slices ( slice1 slice2 -- slice/* )
198 2dup ordered-slices-touch? [
199 [ from>> ] [ [ to>> ] [ seq>> ] bi ] bi* <slice>
204 : rotate ( seq n -- seq' )
205 over length mod dup 0 >= [ cut ] [ abs cut* ] if prepend ;
207 ERROR: underlying-mismatch slice1 slice2 ;
208 : ensure-same-underlying ( slice1 slice2 -- slice1 slice2 )
209 2dup [ seq>> ] bi@ eq? [ underlying-mismatch ] unless ;
211 : span-slices ( slice1 slice2 -- slice )
212 ensure-same-underlying
213 [ [ from>> ] bi@ min ]
215 [ drop seq>> ] 2tri <slice> ;
217 : ?span-slices ( slice1/f slice2/f -- slice )
218 2dup and [ span-slices ] [ or ] if ;
220 :: rotate! ( seq n -- )
222 n len mod dup 0 < [ len + ] when seq bounds-check drop 0 over
224 [ seq exchange-unsafe ] [ [ 1 + ] bi@ ] 2bi
225 dup len = [ drop over ] when
226 2over = [ -rot nip over ] when
229 : all-rotations ( seq -- seq' )
230 dup length iota [ rotate ] with map ;
234 : (appender-for) ( quot length exemplar -- appender accum )
235 new-resizable [ [ push-all ] curry compose ] keep ; inline
239 : appender-for ( quot exemplar -- appender accum )
240 [ length ] keep (appender-for) ; inline
242 : appender ( quot -- appender accum )
243 V{ } appender-for ; inline
245 : map-concat-as ( ... seq quot: ( ... elt -- ... newelt ) exemplar -- ... newseq )
246 [ appender-for [ each ] dip ] keep like ; inline
248 : >resizable ( seq -- accum ) ! fixes map-concat "cannot apply call to run-time..."
249 [ length ] keep [ new-resizable ] [ append! ] bi ;
251 : map-concat ( ... seq quot: ( ... elt -- ... newelt ) -- ... newseq )
252 over empty? [ 2drop { } ] [
253 [ [ first ] dip call ] 2keep rot dup [
254 >resizable [ [ push-all ] curry compose ] keep
255 [ 1 ] 3dip [ setup-each (each-integer) ] dip
259 : map-filter-as ( ... seq map-quot: ( ... elt -- ... newelt ) filter-quot: ( ... newelt -- ... ? ) exemplar -- ... subseq )
260 [ pick ] dip swap length over
261 [ (selector-as) [ compose each ] dip ] 2curry dip like ; inline
263 : map-filter ( ... seq map-quot: ( ... elt -- ... newelt ) filter-quot: ( ... newelt -- ... ? ) -- ... subseq )
264 pick map-filter-as ; inline
266 : map-sift ( ... seq quot: ( ... elt -- ... newelt ) -- ... newseq )
267 [ ] map-filter ; inline
269 : map-harvest ( ... seq quot: ( ... elt -- ... newelt ) -- ... newseq )
270 [ empty? not ] map-filter ; inline
274 : (setup-each-from) ( i seq -- n quot )
275 [ length over [-] swap ] keep '[ _ + _ nth-unsafe ] ; inline
277 : setup-each-from ( i seq quot -- n quot' )
278 [ (setup-each-from) ] dip compose ; inline
282 : map-from-as ( ... seq quot: ( ... elt -- ... newelt ) i exemplar -- ... newseq )
283 [ -rot setup-each-from ] dip map-integers ; inline
285 : map-from ( ... seq quot: ( ... elt -- ... newelt ) i -- ... newseq )
286 pick map-from-as ; inline
290 : push-map-if ( ..a elt filter-quot: ( ..a elt -- ..b ? ) map-quot: ( ..a elt -- ..b newelt ) accum -- ..b )
291 [ keep over ] 2dip [ when ] dip rot [ push ] [ 2drop ] if ; inline
293 : (filter-mapper-for) ( filter-quot map-quot length exempler -- filter-mapper accum )
294 new-resizable [ [ push-map-if ] 3curry ] keep ; inline
296 : filter-mapper-for ( filter-quot map-quot exemplar -- filter-mapper accum )
297 [ length ] keep (filter-mapper-for) ; inline
299 : filter-mapper ( filter-quot map-quot -- filter-mapper accum )
300 V{ } filter-mapper-for ; inline
304 : filter-map-as ( ... seq filter-quot: ( ... elt -- ... ? ) map-quot: ( ... elt -- ... newelt ) exemplar -- ... newseq )
305 [ pick ] dip swap length over
306 [ (filter-mapper-for) [ each ] dip ] 2curry dip like ; inline
308 : filter-map ( ... seq filter-quot: ( ... elt -- ... ? ) map-quot: ( ... elt -- ... newelt ) -- ... newseq )
309 pick filter-map-as ; inline
311 : 2map-sum ( ... seq1 seq2 quot: ( ... elt1 elt2 -- ... n ) -- ... n )
312 [ 0 ] 3dip [ dip + ] curry [ rot ] prepose 2each ; inline
314 : 2count ( ... seq1 seq2 quot: ( ... elt1 elt2 -- ... ? ) -- ... n )
315 [ 1 0 ? ] compose 2map-sum ; inline
317 : round-robin ( seq -- newseq )
319 [ longest length iota ] keep
320 [ [ ?nth ] with map ] curry map concat sift
323 : sift-as ( seq exemplar -- newseq )
326 : sift! ( seq -- newseq )
329 : harvest-as ( seq exemplar -- newseq )
330 [ empty? not ] swap filter-as ;
332 : harvest! ( seq -- newseq )
335 : head-as ( seq n exemplar -- seq' )
336 [ head-slice ] [ like ] bi* ; inline
338 : head*-as ( seq n exemplar -- seq' )
339 [ head-slice* ] [ like ] bi* ; inline
341 : tail-as ( seq n exemplar -- seq' )
342 [ tail-slice ] [ like ] bi* ; inline
344 : tail*-as ( seq n exemplar -- seq' )
345 [ tail-slice* ] [ like ] bi* ; inline
347 : trim-as ( ... seq quot: ( ... elt -- ... ? ) exemplar -- ... newseq )
348 [ trim-slice ] [ like ] bi* ; inline
350 : ?trim ( seq quot: ( elt -- ? ) -- seq/newseq )
351 over empty? [ drop ] [
352 over [ first-unsafe ] [ last-unsafe ] bi pick either?
356 : ?trim-head ( seq quot: ( elt -- ? ) -- seq/newseq )
357 over empty? [ drop ] [
358 over first-unsafe over call
359 [ trim-head ] [ drop ] if
362 : ?trim-tail ( seq quot: ( elt -- ? ) -- seq/newseq )
363 over empty? [ drop ] [
364 over last-unsafe over call
365 [ trim-tail ] [ drop ] if
368 : unsurround ( newseq seq2 seq3 -- seq1 )
369 [ ?head drop ] [ ?tail drop ] bi* ;
371 : none? ( ... seq quot: ( ... elt -- ... ? ) -- ... ? )
374 : one? ( ... seq quot: ( ... elt -- ... ? ) -- ... ? )
376 [ 1 + ] 2dip find-from drop not
377 ] [ 3drop f ] if ; inline
379 : map-index! ( ... seq quot: ( ... elt index -- ... newelt ) -- ... seq )
380 over [ [ (each-index) ] dip collect ] keep ; inline
384 : (2each-index) ( seq1 seq2 quot -- n quot' )
385 [ setup-2each [ keep ] curry ] dip compose ; inline
389 : 2each-index ( ... seq1 seq2 quot: ( ... elt1 elt2 index -- ... ) -- ... )
390 (2each-index) each-integer ; inline
392 : 2map-into ( seq1 seq2 quot into -- )
393 [ (2each) ] dip collect ; inline
395 : 2map! ( ... seq1 seq2 quot: ( ... elt1 elt2 -- ... newelt ) -- ... seq1 )
396 pick [ 2map-into ] keep ; inline
398 : 2map-index ( ... seq1 seq2 quot: ( ... elt1 elt2 index -- ... newelt ) -- ... newseq )
399 pick [ (2each-index) ] dip map-integers ; inline
401 TUPLE: evens seq length ;
403 : <evens> ( seq -- evens )
404 dup length 1 + 2/ evens boa ; inline
406 M: evens length length>> ; inline
408 M: evens nth-unsafe [ 2 * ] [ seq>> nth-unsafe ] bi* ; inline
410 INSTANCE: evens immutable-sequence
412 TUPLE: odds seq length ;
414 : <odds> ( seq -- odds )
415 dup length 2/ odds boa ; inline
417 M: odds length length>> ; inline
419 M: odds nth-unsafe [ 2 * 1 + ] [ seq>> nth-unsafe ] bi* ; inline
421 INSTANCE: odds immutable-sequence
423 : until-empty ( seq quot -- )
424 [ dup empty? ] swap until drop ; inline
426 : arg-max ( seq -- n )
427 <enum> [ second-unsafe ] supremum-by first ;
429 : arg-min ( seq -- n )
430 <enum> [ second-unsafe ] infimum-by first ;
434 : push-index-if ( ..a elt i quot: ( ..a elt -- ..b ? ) accum -- ..b )
435 [ dip ] dip rot [ push ] [ 2drop ] if ; inline
439 : arg-where ( ... seq quot: ( ... elt -- ... ? ) -- ... indices )
440 over length <vector> [
441 [ push-index-if ] 2curry each-index
444 : arg-sort ( seq -- indices )
445 zip-index sort-keys values ;
447 : first= ( seq elt -- ? ) [ first ] dip = ; inline
448 : second= ( seq elt -- ? ) [ second ] dip = ; inline
449 : third= ( seq elt -- ? ) [ third ] dip = ; inline
450 : fourth= ( seq elt -- ? ) [ fourth ] dip = ; inline
451 : last= ( seq elt -- ? ) [ last ] dip = ; inline
452 : nth= ( n seq elt -- ? ) [ nth ] dip = ; inline
454 : first? ( ... seq quot: ( ... elt -- ... ? ) -- ... ? ) [ first ] dip call ; inline
455 : second? ( ... seq quot: ( ... elt -- ... ? ) -- ... ? ) [ second ] dip call ; inline
456 : third? ( ... seq quot: ( ... elt -- ... ? ) -- ... ? ) [ third ] dip call ; inline
457 : fourth? ( ... seq quot: ( ... elt -- ... ? ) -- ... ? ) [ fourth ] dip call ; inline
458 : last? ( ... seq quot: ( ... elt -- ... ? ) -- ... ? ) [ last ] dip call ; inline
459 : nth? ( ... n seq quot: ( ... elt -- ... ? ) -- ... ? ) [ nth ] dip call ; inline
461 : loop>sequence ( quot exemplar -- seq )
462 [ '[ [ @ [ [ , ] when* ] keep ] loop ] ] dip make ; inline
464 : loop>array ( quot -- seq )
465 { } loop>sequence ; inline
469 : (reverse) ( seq -- newseq )
470 dup [ length ] keep new-sequence
471 [ 0 swap copy-unsafe ] keep reverse! ;
475 : reverse-as ( seq exemplar -- newseq )
476 [ (reverse) ] [ like ] bi* ;
478 : map-product ( ... seq quot: ( ... elt -- ... n ) -- ... n )
479 [ 1 ] 2dip [ dip * ] curry [ swap ] prepose each ; inline
481 : insert-nth! ( elt n seq -- )
482 [ length ] keep ensure swap pick (a,b]
483 over '[ [ 1 + ] keep _ move-unsafe ] each
486 : set-nths ( value indices seq -- )
487 swapd '[ _ swap _ set-nth ] each ; inline
489 : set-nths-unsafe ( value indices seq -- )
490 swapd '[ _ swap _ set-nth-unsafe ] each ; inline
492 : flatten1 ( obj -- seq )
496 [ dup branch? [ % ] [ , ] if ] each
499 ] keep dup branch? [ drop f ] unless make ;
503 : (map-find-index) ( seq quot find-quot -- result i elt )
504 [ [ f ] 2dip [ [ nip ] 2dip call dup ] curry ] dip call
505 [ [ [ drop f ] unless ] keep ] dip ; inline
509 : map-find-index ( ... seq quot: ( ... elt index -- ... result/f ) -- ... result i elt )
510 [ find-index ] (map-find-index) ; inline
512 : filter-length ( seq n -- seq' ) '[ length _ = ] filter ;
514 : all-shortest ( seqs -- seqs' ) dup shortest length filter-length ;
516 : all-longest ( seqs -- seqs' ) dup longest length filter-length ;
518 : remove-first ( obj seq -- seq' )
519 [ index ] keep over [ remove-nth ] [ nip ] if ;
521 : remove-first! ( obj seq -- seq )
522 [ index ] keep over [ remove-nth! ] [ nip ] if ;
524 : remove-last ( obj seq -- seq' )
525 [ last-index ] keep over [ remove-nth ] [ nip ] if ;
527 : remove-last! ( obj seq -- seq )
528 [ last-index ] keep over [ remove-nth! ] [ nip ] if ;
530 : ?first2 ( seq -- first/f second/f )
533 { 1 [ first-unsafe f ] }
534 [ drop first2-unsafe ]
537 : ?first3 ( seq -- first/f second/f third/f )
540 { 1 [ first-unsafe f f ] }
541 { 2 [ first2-unsafe f ] }
542 [ drop first3-unsafe ]
545 : ?first4 ( seq -- first/f second/f third/f fourth/f )
547 { 0 [ drop f f f f ] }
548 { 1 [ first-unsafe f f f ] }
549 { 2 [ first2-unsafe f f ] }
550 { 3 [ first3-unsafe f ] }
551 [ drop first4-unsafe ]
554 : cut-when ( ... seq quot: ( ... elt -- ... ? ) -- ... before after )
555 [ find drop ] 2keep drop swap
556 [ cut ] [ f over like ] if* ; inline
558 : nth* ( n seq -- elt )
559 [ length 1 - swap - ] [ nth ] bi ; inline
561 : each-index-from ( ... seq quot: ( ... elt index -- ... ) i -- ... )
562 -rot (each-index) (each-integer) ; inline
566 : select-by* ( ... seq quot: ( ... elt -- ... x ) compare: ( obj1 obj2 -- ? ) -- ... i elt )
568 [ keep swap ] curry [ dip ] curry
569 [ [ first 0 ] dip call ] 2keep
570 [ 2curry 3dip 5 npick pick ] curry
572 [ [ 3drop ] [ [ 3drop ] 3dip ] if ] compose
573 ] bi* compose 1 each-index-from nip swap ; inline
577 : supremum-by* ( ... seq quot: ( ... elt -- ... x ) -- ... i elt )
578 [ after? ] select-by* ; inline
580 : infimum-by* ( ... seq quot: ( ... elt -- ... x ) -- ... i elt )
581 [ before? ] select-by* ; inline
583 : change-last ( seq quot -- )
584 [ drop length 1 - ] [ change-nth ] 2bi ; inline
586 : change-last-unsafe ( seq quot -- )
587 [ drop length 1 - ] [ change-nth-unsafe ] 2bi ; inline
589 : replicate-into ( ... seq quot: ( ... -- ... newelt ) -- ... )
590 over [ length ] 2dip '[ _ dip _ set-nth-unsafe ] each-integer ; inline
592 : count* ( ... seq quot: ( ... elt -- ... ? ) -- ... % )
593 over [ count ] [ length ] bi* / ; inline
595 : find-last-index ( ... seq quot: ( ... elt i -- ... ? ) -- ... i elt )
596 [ [ 1 - ] dip find-last-integer ] (find-index) ; inline
598 : map-find-last-index ( ... seq quot: ( ... elt index -- ... result/f ) -- ... result i elt )
599 [ find-last-index ] (map-find-index) ; inline
601 :: (start-all) ( subseq seq increment -- indices )
603 [ [ subseq seq ] dip start* dup ]
604 [ [ increment + ] keep ] produce nip ;
606 : start-all ( subseq seq -- indices )
607 over length (start-all) ; inline
609 : start-all* ( subseq seq -- indices )
610 1 (start-all) ; inline
612 : count-subseq ( subseq seq -- n )
613 start-all length ; inline
615 : count-subseq* ( subseq seq -- n )
616 start-all* length ; inline
618 : map-zip ( quot: ( x -- y ) -- alist )
619 '[ _ keep swap ] map>alist ; inline
621 : map-keys ( assoc quot: ( key -- key' ) -- assoc )
622 '[ _ dip ] assoc-map ; inline
624 : map-values ( assoc quot: ( value -- value' ) -- assoc )
625 '[ swap _ dip swap ] assoc-map ; inline