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 : all-subseqs ( seq -- seqs )
36 dup length [1,b] [ clump ] with map concat ;
38 :: each-subseq ( ... seq quot: ( ... x -- ... ) -- ... )
44 from to seq subseq quot call
48 : subseq-as ( from to seq exemplar -- subseq )
49 [ check-slice subseq>copy (copy) ] dip like ;
51 : map-like ( seq exemplar -- seq' )
52 '[ _ like ] map ; inline
54 : filter-all-subseqs-range ( ... seq range quot: ( ... x -- ... ) -- seq )
56 '[ <clumps> _ filter ] with map concat
57 ] 3keep 2drop map-like ; inline
59 : filter-all-subseqs ( ... seq quot: ( ... x -- ... ) -- seq )
60 [ dup length [1,b] ] dip filter-all-subseqs-range ; inline
62 :: longest-subseq ( seq1 seq2 -- subseq )
67 len1 1 + [ len2 1 + 0 <array> ] replicate :> table
71 y 1 - seq2 nth-unsafe = [
72 y 1 - x 1 - table nth-unsafe nth-unsafe 1 + :> len
73 len y x table nth-unsafe set-nth-unsafe
74 len n > [ len n! x end! ] when
75 ] [ 0 y x table nth-unsafe set-nth-unsafe ] if
77 ] each end n - end seq1 subseq ;
79 : pad-longest ( seq1 seq2 elt -- seq1 seq2 )
80 [ 2dup max-length ] dip [ pad-tail ] 2curry bi@ ;
82 : change-nths ( ... indices seq quot: ( ... elt -- ... elt' ) -- ... )
83 [ change-nth ] 2curry each ; inline
85 : push-if-index ( ..a elt i quot: ( ..a elt i -- ..b ? ) accum -- ..b )
86 [ 2keep drop ] dip rot [ push ] [ 2drop ] if ; inline
90 : (index-selector-for) ( quot length exampler -- selector accum )
91 new-resizable [ [ push-if-index ] 2curry ] keep ; inline
95 : index-selector-for ( quot exemplar -- selector accum )
96 [ length ] keep (index-selector-for) ; inline
98 : index-selector ( quot -- selector accum )
99 V{ } index-selector-for ; inline
101 : filter-index-as ( ... seq quot: ( ... elt i -- ... ? ) exemplar -- ... seq' )
102 pick length over [ (index-selector-for) [ each-index ] dip ] 2curry dip like ; inline
104 : filter-index ( ... seq quot: ( ... elt i -- ... ? ) -- ... seq' )
105 over filter-index-as ; inline
107 : even-indices ( seq -- seq' )
108 [ length 1 + 2/ ] keep [
109 [ [ 2 * ] dip nth-unsafe ] curry
110 ] keep map-integers ;
112 : odd-indices ( seq -- seq' )
114 [ [ 2 * 1 + ] dip nth-unsafe ] curry
115 ] keep map-integers ;
117 : compact ( ... seq quot: ( ... elt -- ... ? ) elt -- ... seq' )
118 [ split-when harvest ] dip join ; inline
120 : collapse ( ... seq quot: ( ... elt -- ... ? ) elt -- ... seq' )
122 [ [ harvest ] dip join ]
123 [ [ first empty? ] dip [ prepend ] curry when ]
124 [ [ last empty? ] dip [ append ] curry when ]
127 :: slice-when ( seq quot: ( elt -- ? ) -- seq' )
130 dup seq quot find-from drop
131 [ 2dup = [ 1 + ] when ] [ len ] if*
132 [ seq <slice> ] keep len or swap
133 ] produce nip ; inline
135 : cut-slice* ( seq n -- before after )
136 [ head-slice* ] [ tail-slice* ] 2bi ;
138 : rotate ( seq n -- seq' )
141 :: rotate! ( seq n -- )
142 n seq bounds-check length :> end
144 [ seq exchange-unsafe ] [ [ 1 + ] bi@ ] 2bi
145 dup end = [ drop over ] when
146 2over = [ -rot nip over ] when
149 : all-rotations ( seq -- seq' )
150 dup length iota [ rotate ] with map ;
154 : (appender-for) ( quot length exemplar -- appender accum )
155 new-resizable [ [ push-all ] curry compose ] keep ; inline
159 : appender-for ( quot exemplar -- appender accum )
160 [ length ] keep (appender-for) ; inline
162 : appender ( quot -- appender accum )
163 V{ } appender-for ; inline
165 : map-concat-as ( ... seq quot: ( ... elt -- ... newelt ) exemplar -- ... newseq )
166 pick length over [ (appender-for) [ each ] dip ] 2curry dip like ; inline
168 : >resizable ( seq -- accum ) ! fixes map-concat "cannot apply call to run-time..."
169 [ length ] keep [ new-resizable ] [ over push-all ] bi ;
171 : map-concat ( ... seq quot: ( ... elt -- ... newelt ) -- ... newseq )
173 first over call dup [
174 >resizable [ [ push-all ] curry compose ] keep
175 [ 1 ] 3dip [ (each) (each-integer) ] dip
179 : map-filter-as ( ... seq map-quot: ( ... elt -- ... newelt ) filter-quot: ( ... newelt -- ... ? ) exemplar -- ... subseq )
180 [ pick ] dip swap length over
181 [ (selector-for) [ compose each ] dip ] 2curry dip like ; inline
183 : map-filter ( ... seq map-quot: ( ... elt -- ... newelt ) filter-quot: ( ... newelt -- ... ? ) -- ... subseq )
184 pick map-filter-as ; inline
186 : map-sift ( ... seq quot: ( ... elt -- ... newelt ) -- ... newseq )
187 [ ] map-filter ; inline
189 : map-harvest ( ... seq quot: ( ... elt -- ... newelt ) -- ... newseq )
190 [ empty? not ] map-filter ; inline
194 : ((each-from)) ( i seq -- n quot )
195 [ length over [-] swap ] keep '[ _ + _ nth-unsafe ] ; inline
197 : (each-from) ( i seq quot -- n quot' ) [ ((each-from)) ] dip compose ;
202 : map-from-as ( ... seq quot: ( ... elt -- ... newelt ) i exemplar -- ... newseq )
203 [ -rot (each-from) ] dip map-integers ; inline
205 : map-from ( ... seq quot: ( ... elt -- ... newelt ) i -- ... newseq )
206 pick map-from-as ; inline
210 : push-map-if ( ..a elt filter-quot: ( ..a elt -- ..b ? ) map-quot: ( ..a elt -- ..b newelt ) accum -- ..b )
211 [ keep over ] 2dip [ when ] dip rot [ push ] [ 2drop ] if ; inline
213 : (filter-mapper-for) ( filter-quot map-quot length exempler -- filter-mapper accum )
214 new-resizable [ [ push-map-if ] 3curry ] keep ; inline
216 : filter-mapper-for ( filter-quot map-quot exemplar -- filter-mapper accum )
217 [ length ] keep (filter-mapper-for) ; inline
219 : filter-mapper ( filter-quot map-quot -- filter-mapper accum )
220 V{ } filter-mapper-for ; inline
224 : filter-map-as ( ... seq filter-quot: ( ... elt -- ... ? ) map-quot: ( ... elt -- ... newelt ) exemplar -- ... newseq )
225 [ pick ] dip swap length over
226 [ (filter-mapper-for) [ each ] dip ] 2curry dip like ; inline
228 : filter-map ( ... seq filter-quot: ( ... elt -- ... ? ) map-quot: ( ... elt -- ... newelt ) -- ... newseq )
229 pick filter-map-as ; inline
231 : 2map-sum ( ... seq1 seq2 quot: ( ... elt1 elt2 -- ... n ) -- ... n )
232 [ 0 ] 3dip [ dip + ] curry [ rot ] prepose 2each ; inline
234 : 2count ( ... seq1 seq2 quot: ( ... elt1 elt2 -- ... ? ) -- ... n )
235 [ 1 0 ? ] compose 2map-sum ; inline
237 : round-robin ( seq -- newseq )
239 [ longest length iota ] keep
240 [ [ ?nth ] with map ] curry map concat sift
243 : sift-as ( seq exemplar -- newseq )
246 : sift! ( seq -- newseq )
249 : harvest-as ( seq exemplar -- newseq )
250 [ empty? not ] swap filter-as ;
252 : harvest! ( seq -- newseq )
253 [ empty? not ] filter! ;
255 : contains? ( seq elts -- ? )
256 [ member? ] curry any? ; inline
258 : head-as ( seq n exemplar -- seq' )
259 [ head-slice ] [ like ] bi* ; inline
261 : head*-as ( seq n exemplar -- seq' )
262 [ head-slice* ] [ like ] bi* ; inline
264 : tail-as ( seq n exemplar -- seq' )
265 [ tail-slice ] [ like ] bi* ; inline
267 : tail*-as ( seq n exemplar -- seq' )
268 [ tail-slice* ] [ like ] bi* ; inline
270 : trim-as ( ... seq quot: ( ... elt -- ... ? ) exemplar -- ... newseq )
271 [ trim-slice ] [ like ] bi* ; inline
273 : ?trim ( seq quot: ( elt -- ? ) -- seq/newseq )
274 over empty? [ drop ] [
275 over [ first-unsafe ] [ last-unsafe ] bi pick bi@ or
279 : ?trim-head ( seq quot: ( elt -- ? ) -- seq/newseq )
280 over empty? [ drop ] [
281 over first-unsafe over call
282 [ trim-head ] [ drop ] if
285 : ?trim-tail ( seq quot: ( elt -- ? ) -- seq/newseq )
286 over empty? [ drop ] [
287 over last-unsafe over call
288 [ trim-tail ] [ drop ] if
291 : unsurround ( newseq seq2 seq3 -- seq1 )
292 [ ?head drop ] [ ?tail drop ] bi* ;
294 : none? ( ... seq quot: ( ... elt -- ... ? ) -- ... ? )
297 : one? ( ... seq quot: ( ... elt -- ... ? ) -- ... ? )
299 [ 1 + ] 2dip find-from drop not
300 ] [ 3drop f ] if ; inline
302 : map-index! ( ... seq quot: ( ... elt index -- ... newelt ) -- ... seq )
303 over [ [ (each-index) ] dip collect ] keep ; inline
307 : (2each-index) ( seq1 seq2 quot -- n quot' )
308 [ ((2each)) [ keep ] curry ] dip compose ; inline
312 : 2each-index ( ... seq1 seq2 quot: ( ... elt1 elt2 index -- ... ) -- ... )
313 (2each-index) each-integer ; inline
315 : 2map-into ( seq1 seq2 quot into -- )
316 [ (2each) ] dip collect ; inline
318 : 2map! ( ... seq1 seq2 quot: ( ... elt1 elt2 -- ... newelt ) -- ... seq1 )
319 pick [ 2map-into ] keep ; inline
321 : 2map-index ( ... seq1 seq2 quot: ( ... elt1 elt2 index -- ... newelt ) -- ... newseq )
322 pick [ (2each-index) ] dip map-integers ; inline
324 TUPLE: evens seq length ;
326 : <evens> ( seq -- evens )
327 dup length 1 + 2/ evens boa ; inline
329 M: evens length length>> ; inline
331 M: evens nth-unsafe [ 2 * ] [ seq>> nth-unsafe ] bi* ; inline
333 INSTANCE: evens immutable-sequence
335 TUPLE: odds seq length ;
337 : <odds> ( seq -- odds )
338 dup length 2/ odds boa ; inline
340 M: odds length length>> ; inline
342 M: odds nth-unsafe [ 2 * 1 + ] [ seq>> nth-unsafe ] bi* ; inline
344 INSTANCE: odds immutable-sequence
346 : until-empty ( seq quot -- )
347 [ dup empty? ] swap until drop ; inline
349 : arg-max ( seq -- n )
350 <enum> [ second-unsafe ] supremum-by first ;
352 : arg-min ( seq -- n )
353 <enum> [ second-unsafe ] infimum-by first ;
357 : push-index-if ( ..a elt i quot: ( ..a elt -- ..b ? ) accum -- ..b )
358 [ dip ] dip rot [ push ] [ 2drop ] if ; inline
362 : arg-where ( ... seq quot: ( ... elt -- ... ? ) -- ... indices )
363 over length <vector> [
364 [ push-index-if ] 2curry each-index
367 : arg-sort ( seq -- indices )
368 dup length iota zip sort-keys values ;
370 : first= ( seq elt -- ? ) [ first ] dip = ; inline
371 : second= ( seq elt -- ? ) [ second ] dip = ; inline
372 : third= ( seq elt -- ? ) [ third ] dip = ; inline
373 : fourth= ( seq elt -- ? ) [ fourth ] dip = ; inline
374 : last= ( seq elt -- ? ) [ last ] dip = ; inline
375 : nth= ( n seq elt -- ? ) [ nth ] dip = ; inline
377 : first? ( seq quot -- ? ) [ first ] dip call ; inline
378 : second? ( seq quot -- ? ) [ second ] dip call ; inline
379 : third? ( seq quot -- ? ) [ third ] dip call ; inline
380 : fourth? ( seq quot -- ? ) [ fourth ] dip call ; inline
381 : last? ( seq quot -- ? ) [ last ] dip call ; inline
382 : nth? ( n seq quot -- ? ) [ nth ] dip call ; inline
384 : loop>sequence ( quot exemplar -- seq )
385 [ '[ [ @ [ [ , ] when* ] keep ] loop ] ] dip make ; inline
387 : loop>array ( quot -- seq )
388 { } loop>sequence ; inline
392 : (reverse) ( seq -- newseq )
393 dup [ length ] keep new-sequence
394 [ 0 swap copy-unsafe ] keep reverse! ;
398 : reverse-as ( seq exemplar -- newseq )
399 [ (reverse) ] [ like ] bi* ;
401 : map-product ( ... seq quot: ( ... elt -- ... n ) -- ... n )
402 [ 1 ] 2dip [ dip * ] curry [ swap ] prepose each ; inline
404 : insert-nth! ( elt n seq -- )
405 [ length ] keep ensure swap pick (a,b]
406 over '[ [ 1 + ] keep _ move-unsafe ] each
409 : set-nths ( value indices seq -- )
410 swapd '[ [ _ ] dip _ set-nth ] each ; inline
412 : set-nths-unsafe ( value indices seq -- )
413 swapd '[ [ _ ] dip _ set-nth-unsafe ] each ; inline
415 : flatten1 ( obj -- seq )
419 [ dup branch? [ % ] [ , ] if ] each
422 ] keep dup branch? [ drop f ] unless make ;
426 : (map-find-index) ( seq quot find-quot -- result elt index )
427 [ [ f ] 2dip [ [ nip ] 2dip call dup ] curry ] dip call
428 [ [ [ drop f ] unless ] keep ] dip ; inline
432 : map-find-index ( ... seq quot: ( ... elt index -- ... result/f ) -- ... result elt index )
433 [ find-index ] (map-find-index) ; inline
435 : filter-length ( seq n -- seq' ) '[ length _ = ] filter ;
437 : all-shortest ( seqs -- seqs' ) dup shortest length filter-length ;
439 : all-longest ( seqs -- seqs' ) dup longest length filter-length ;
441 : remove-first ( obj seq -- seq' )
442 [ index ] keep over [ remove-nth ] [ nip ] if ;
444 : remove-first! ( obj seq -- seq )
445 [ index ] keep over [ remove-nth! ] [ nip ] if ;
447 : remove-last ( obj seq -- seq' )
448 [ last-index ] keep over [ remove-nth ] [ nip ] if ;
450 : remove-last! ( obj seq -- seq )
451 [ last-index ] keep over [ remove-nth! ] [ nip ] if ;