author | Claus Gittinger <cg@exept.de> |
Sat, 06 Jun 2015 13:42:28 +0200 | |
changeset 18449 | 48c31fe80359 |
parent 16002 | 5fd1486ee60a |
child 18120 | e3a375d5f6a8 |
child 18508 | cd84f2138c53 |
permissions | -rw-r--r-- |
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" |
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COPYRIGHT (c) 1993 by Claus Gittinger |
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All Rights Reserved |
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This software is furnished under a license and may be used |
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only in accordance with the terms of that license and with the |
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inclusion of the above copyright notice. This software may not |
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be provided or otherwise made available to, or used by, any |
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other person. No title to or ownership of the software is |
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hereby transferred. |
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" |
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"{ Package: 'stx:libbasic' }" |
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OrderedCollection subclass:#SortedCollection |
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instanceVariableNames:'sortBlock' |
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classVariableNames:'DefaultSortBlock' |
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poolDictionaries:'' |
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category:'Collections-Sequenceable' |
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! |
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!SortedCollection class methodsFor:'documentation'! |
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copyright |
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" |
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COPYRIGHT (c) 1993 by Claus Gittinger |
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All Rights Reserved |
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This software is furnished under a license and may be used |
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only in accordance with the terms of that license and with the |
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30 |
inclusion of the above copyright notice. This software may not |
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31 |
be provided or otherwise made available to, or used by, any |
|
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other person. No title to or ownership of the software is |
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hereby transferred. |
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" |
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! |
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||
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documentation |
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" |
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I keep my elements sorted. The sort order is defined by a sortblock, |
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a two-argument block which, when given two elements of the collection, |
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should return true if the element given as first arg has to come before the |
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element given as second arg. |
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Equal elements may occur multiple times. |
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SortedCollection uses quickSort to resort and a binary search when adding/removing elements. |
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Because insertion/removal may require that remaining elements have to |
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be shifted within the container, adding many individual elements may be done faster |
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by creating a completely new collection from the unsorted elements. |
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(see examples) |
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A sortBlock of [:a :b | a < b] defines ascending sort-order, |
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while [:a :b | a > b] defines descening order. |
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The default sortBlock for SortedCollections is the first one. |
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Compatibility Warning: |
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VW seems to use a default sortBlock which compares a<=b, wheras ST/X uses a<b. |
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That means, that elements which are compared MUST understand #< in ST/X |
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while the minumum protocol is #<= in VW. |
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This may be changed in a future release of ST/X |
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(it is not yet, to not confuse existing applications ... |
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... be aware, that the sortBlock has an effect on a few algorithms |
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found here; especially #indexForInserting is critical.) |
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[caveat:] |
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a balanced tree may be a better choice, as inserting may be slow when |
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elements have to be shifted. |
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[author:] |
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Claus Gittinger |
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" |
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! |
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examples |
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" |
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when many elements are to be added, it may be better to add them |
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all en-bloeque instead of individually. |
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The reason is that for each individual #add:, the contents has to be |
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shifted, to create an empty slot for the new element. |
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timing example: |
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|o rnd| |
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o := SortedCollection new. |
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rnd := Random new. |
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10000 timesRepeat:[ |
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o add:rnd next. |
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] |
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takes 1365 ms on a P5 (admitted: this is a fast machine ;-) |
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Times are a'changing: |
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Just came around 2005: on my 1.5Ghz laptop, this now takes 260ms... |
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an another comment 2008: on a 1.8Ghz laptop, it takes now 105ms... |
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In contrast: |
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|o rnd| |
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o := OrderedCollection new. |
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rnd := Random new. |
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10000 timesRepeat:[ |
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o add:rnd next. |
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]. |
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o := o asSortedCollection |
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takes 383 ms on the same machine. |
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2005: on my 1.5Ghz laptop, this now takes 100ms |
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2008: on a 1.8Ghz laptop, this now takes 47ms |
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If you already have a big sortedCollection at hand, adding multiple |
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items may be better done with #addAll:, which resorts all elements, if |
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the number of added items is more than some threshold number. |
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However, the break-even point where bulk-adding is faster depends |
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on the machine ... (and ST/X version ;-). |
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tuned add: if the elements are added in sorted order
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adding elements in order: |
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|c| |
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Time millisecondsToRun:[ |
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10 timesRepeat:[ |
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|c| |
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c := SortedCollection new. |
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(1 to:100000) do:[:e | c add:e]. |
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] |
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]. |
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(5.4.1: 2031 2187) |
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(5.4.3: 484 516) |
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|c| |
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c := SortedCollection new. |
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(1 to:100000) do:[:e | c add:e]. |
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self assert:(c asBag = (1 to:100000) asBag). |
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adding elements in reverse order: |
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Time millisecondsToRun:[ |
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10 timesRepeat:[ |
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|c| |
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c := SortedCollection new. |
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(1 to:100000) reverseDo:[:e | c add:e]. |
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] |
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]. |
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(5.4.1: 201969) |
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(5.4.3: 1609 1766) |
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|c| |
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c := SortedCollection new. |
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(1 to:100000) reverseDo:[:e | c add:e]. |
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self assert:(c asBag = (1 to:100000) asBag). |
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adding elements in random order: |
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|toAdd| |
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toAdd := (1 to:100000) asOrderedCollection randomShuffle. |
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Time millisecondsToRun:[ |
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10 timesRepeat:[ |
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|c| |
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c := SortedCollection new. |
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toAdd do:[:e | c add:e]. |
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] |
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]. |
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(5.4.1: 108484) |
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(5.4.3: 75734) |
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|c| |
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c := SortedCollection new. |
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(1 to:100000) asOrderedCollection randomShuffle do:[:e | c add:e]. |
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self assert:(c asBag = (1 to:100000) asBag). |
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" |
77 | 177 |
! ! |
1 | 178 |
|
179 |
!SortedCollection class methodsFor:'initialization'! |
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180 |
||
181 |
initialize |
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182 |
"setup the default sortBlock. |
12034 | 183 |
Use #<, since this is the base method in Magnitude." |
1155 | 184 |
|
185 |
"/ only do this once at early startup |
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913 | 186 |
DefaultSortBlock isNil ifTrue:[ |
12034 | 187 |
DefaultSortBlock := [:a :b | a < b] |
913 | 188 |
] |
1 | 189 |
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913 | 190 |
" |
191 |
SortedCollection initialize |
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192 |
" |
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1155 | 193 |
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194 |
"Modified: 12.4.1996 / 12:29:27 / cg" |
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1 | 195 |
! ! |
196 |
||
197 |
!SortedCollection class methodsFor:'instance creation'! |
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||
2929 | 199 |
forStrings |
200 |
"this is supposed to return a sortedCollection, which sorts using |
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201 |
the current locales collating sequence. For now, simply use a |
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202 |
normal string compare. |
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203 |
This will change" |
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205 |
^ self new |
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206 |
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207 |
"Modified: 13.9.1997 / 10:18:58 / cg" |
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208 |
"Created: 13.9.1997 / 10:41:54 / cg" |
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209 |
! |
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210 |
||
211 |
forStrings:size |
|
212 |
"this is supposed to return a sortedCollection, which sorts using |
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213 |
the current locales collating sequence. For now, simply use a |
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214 |
normal string compare. |
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215 |
This will change" |
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216 |
||
217 |
^ self new:size |
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218 |
||
219 |
"Modified: 13.9.1997 / 10:18:58 / cg" |
|
220 |
! |
|
221 |
||
1 | 222 |
new |
2 | 223 |
"return a new sortedCollection, the sorting is done using |
1155 | 224 |
a compare for a < b, in ascending order" |
2 | 225 |
|
1 | 226 |
^ super new setSortBlock:DefaultSortBlock |
1155 | 227 |
|
228 |
"Modified: 12.4.1996 / 12:28:18 / cg" |
|
1 | 229 |
! |
230 |
||
231 |
new:size |
|
2 | 232 |
"return a new sortedCollection with preallocated size. |
1155 | 233 |
The sorting is done using a compare for a < b, in ascending order" |
2 | 234 |
|
1 | 235 |
^ (super new:size) setSortBlock:DefaultSortBlock |
1155 | 236 |
|
237 |
"Modified: 12.4.1996 / 12:28:22 / cg" |
|
1 | 238 |
! |
239 |
||
240 |
sortBlock:aBlock |
|
1155 | 241 |
"return a new sortedCollection, whe the sort order is defined |
8874 | 242 |
by aBlock. |
1155 | 243 |
This must be a two-argument block which returns true if its arg1 has to come before |
244 |
its arg2 in the collection." |
|
2 | 245 |
|
1 | 246 |
^ super new setSortBlock:aBlock |
1155 | 247 |
|
248 |
"default: |
|
249 |
|s| |
|
250 |
||
251 |
s := SortedCollection new. |
|
252 |
s add:15; add:99; add:3; add:-29; add:17; add:-6. |
|
1422 | 253 |
Transcript showCR:s |
1155 | 254 |
" |
255 |
||
256 |
"sorting by absolute values: |
|
257 |
|s| |
|
258 |
||
259 |
s := SortedCollection sortBlock:[:a :b | a abs < b abs]. |
|
260 |
s add:15; add:99; add:3; add:29; add:17; add:-6. |
|
1422 | 261 |
Transcript showCR:s |
1155 | 262 |
" |
263 |
||
264 |
"default again: |
|
265 |
|s| |
|
266 |
||
267 |
s := SortedCollection new. |
|
268 |
s add:'foo'; add:'Bar'; add:'baz'; add:'hello'; add:'world'; add:'Wow'. |
|
1422 | 269 |
Transcript showCR:s |
1155 | 270 |
" |
271 |
||
272 |
"sorting strings caseless: |
|
273 |
|s| |
|
274 |
||
275 |
s := SortedCollection sortBlock:[:a :b | a asLowercase < b asLowercase]. |
|
276 |
s add:'foo'; add:'Bar'; add:'baz'; add:'hello'; add:'world'; add:'Wow'. |
|
1422 | 277 |
Transcript showCR:s |
1155 | 278 |
" |
279 |
||
280 |
"Modified: 12.4.1996 / 12:26:28 / cg" |
|
329 | 281 |
! |
282 |
||
283 |
withAll:aCollection sortBlock:aBlock |
|
284 |
"initialize from aCollection and set the sort-block" |
|
285 |
||
2248 | 286 |
^ (self sortBlock:aBlock) addAll:aCollection; yourself |
329 | 287 |
|
288 |
" |
|
289 |
SortedCollection withAll:#(1 2 3 4 5 6 7 8 9 0) |
|
8874 | 290 |
sortBlock:[:a :b | a > b] |
1155 | 291 |
" |
292 |
||
293 |
"default: |
|
294 |
|s| |
|
295 |
||
296 |
s := SortedCollection withAll:#(15 99 3 29 17 -6). |
|
1422 | 297 |
Transcript showCR:s |
1155 | 298 |
" |
299 |
||
300 |
"sorting by absolute values: |
|
301 |
|s| |
|
302 |
||
303 |
s := SortedCollection withAll:#(15 99 3 29 17 -6) sortBlock:[:a :b | a abs < b abs]. |
|
1422 | 304 |
Transcript showCR:s |
329 | 305 |
" |
1155 | 306 |
|
307 |
"default again: |
|
308 |
|s| |
|
309 |
||
310 |
s := SortedCollection withAll:#('foo' 'Bar' 'baz' 'hello' 'world' 'Wow'). |
|
1422 | 311 |
Transcript showCR:s |
1155 | 312 |
" |
313 |
||
314 |
"sorting strings caseless: |
|
315 |
|s| |
|
316 |
||
317 |
s := SortedCollection withAll:#('foo' 'Bar' 'baz' 'hello' 'world' 'Wow') sortBlock:[:a :b | a asLowercase < b asLowercase]. |
|
1422 | 318 |
Transcript showCR:s |
1155 | 319 |
" |
320 |
||
321 |
"Modified: 12.4.1996 / 12:28:09 / cg" |
|
1 | 322 |
! ! |
323 |
||
7300 | 324 |
!SortedCollection class methodsFor:'Compatibility-Dolphin'! |
6411 | 325 |
|
326 |
sortBlock:aBlock withAll:aCollection |
|
327 |
^ self withAll:aCollection sortBlock:aBlock |
|
328 |
! ! |
|
329 |
||
1 | 330 |
!SortedCollection methodsFor:'adding & removing'! |
331 |
||
607 | 332 |
add:anObject |
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|
333 |
"add the argument, anObject at the proper place in the receiver. |
7ce883e9a42e
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parents:
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changeset
|
334 |
Returns the argument, anObject (sigh)." |
2 | 335 |
|
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changeset
|
336 |
|index lastElement| |
1 | 337 |
|
11274
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tune adding in order / in reverse order
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parents:
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diff
changeset
|
338 |
"/ |
a6f648b1d291
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parents:
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diff
changeset
|
339 |
"/ cg: the original code was simply: |
a6f648b1d291
tune adding in order / in reverse order
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parents:
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diff
changeset
|
340 |
"/ |
a6f648b1d291
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parents:
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diff
changeset
|
341 |
"/ index := self indexForInserting:anObject. |
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parents:
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|
342 |
"/ index := self makeRoomAtIndex:index. |
a6f648b1d291
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parents:
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changeset
|
343 |
"/ contentsArray basicAt:index put:anObject. |
a6f648b1d291
tune adding in order / in reverse order
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parents:
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diff
changeset
|
344 |
"/ |
a6f648b1d291
tune adding in order / in reverse order
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parents:
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diff
changeset
|
345 |
"/ which was nice and simple to understand. |
a6f648b1d291
tune adding in order / in reverse order
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parents:
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changeset
|
346 |
"/ However, the code below is 5 times faster, if elements are added in an already ordered fashion, |
a6f648b1d291
tune adding in order / in reverse order
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parents:
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changeset
|
347 |
"/ which often happens. |
a6f648b1d291
tune adding in order / in reverse order
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parents:
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diff
changeset
|
348 |
"/ so we allow the code to be a bit more complicated... |
a6f648b1d291
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parents:
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diff
changeset
|
349 |
|
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parents:
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diff
changeset
|
350 |
(lastIndex < firstIndex "i.e. self size == 0" |
7ce883e9a42e
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Claus Gittinger <cg@exept.de>
parents:
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diff
changeset
|
351 |
or:[ |
7ce883e9a42e
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Claus Gittinger <cg@exept.de>
parents:
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diff
changeset
|
352 |
lastElement := contentsArray at:lastIndex. |
7ce883e9a42e
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parents:
9920
diff
changeset
|
353 |
(sortBlock value:lastElement value:anObject) |
7ce883e9a42e
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Claus Gittinger <cg@exept.de>
parents:
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diff
changeset
|
354 |
]) ifTrue:[ |
11274
a6f648b1d291
tune adding in order / in reverse order
Claus Gittinger <cg@exept.de>
parents:
11268
diff
changeset
|
355 |
"/ empty or lastElement is smaller then newElement; add at the end |
11268
7ce883e9a42e
tuned add: if the elements are added in sorted order
Claus Gittinger <cg@exept.de>
parents:
9920
diff
changeset
|
356 |
index := lastIndex. |
7ce883e9a42e
tuned add: if the elements are added in sorted order
Claus Gittinger <cg@exept.de>
parents:
9920
diff
changeset
|
357 |
(index == contentsArray size) ifTrue:[ |
7ce883e9a42e
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Claus Gittinger <cg@exept.de>
parents:
9920
diff
changeset
|
358 |
self makeRoomAtLast. |
7ce883e9a42e
tuned add: if the elements are added in sorted order
Claus Gittinger <cg@exept.de>
parents:
9920
diff
changeset
|
359 |
index := lastIndex. |
7ce883e9a42e
tuned add: if the elements are added in sorted order
Claus Gittinger <cg@exept.de>
parents:
9920
diff
changeset
|
360 |
]. |
7ce883e9a42e
tuned add: if the elements are added in sorted order
Claus Gittinger <cg@exept.de>
parents:
9920
diff
changeset
|
361 |
lastIndex := index := index + 1. |
607 | 362 |
] ifFalse:[ |
11268
7ce883e9a42e
tuned add: if the elements are added in sorted order
Claus Gittinger <cg@exept.de>
parents:
9920
diff
changeset
|
363 |
index := self indexForInserting:anObject. |
11274
a6f648b1d291
tune adding in order / in reverse order
Claus Gittinger <cg@exept.de>
parents:
11268
diff
changeset
|
364 |
(index == firstIndex) ifTrue:[ |
a6f648b1d291
tune adding in order / in reverse order
Claus Gittinger <cg@exept.de>
parents:
11268
diff
changeset
|
365 |
(firstIndex == 1) ifTrue:[ |
a6f648b1d291
tune adding in order / in reverse order
Claus Gittinger <cg@exept.de>
parents:
11268
diff
changeset
|
366 |
self makeRoomAtFront. |
a6f648b1d291
tune adding in order / in reverse order
Claus Gittinger <cg@exept.de>
parents:
11268
diff
changeset
|
367 |
]. |
a6f648b1d291
tune adding in order / in reverse order
Claus Gittinger <cg@exept.de>
parents:
11268
diff
changeset
|
368 |
index := firstIndex := firstIndex - 1. |
a6f648b1d291
tune adding in order / in reverse order
Claus Gittinger <cg@exept.de>
parents:
11268
diff
changeset
|
369 |
] ifFalse:[ |
a6f648b1d291
tune adding in order / in reverse order
Claus Gittinger <cg@exept.de>
parents:
11268
diff
changeset
|
370 |
index := self makeRoomAtIndex:index. |
a6f648b1d291
tune adding in order / in reverse order
Claus Gittinger <cg@exept.de>
parents:
11268
diff
changeset
|
371 |
]. |
607 | 372 |
]. |
3340 | 373 |
contentsArray basicAt:index put:anObject. |
607 | 374 |
^ anObject |
2 | 375 |
|
607 | 376 |
" |
11268
7ce883e9a42e
tuned add: if the elements are added in sorted order
Claus Gittinger <cg@exept.de>
parents:
9920
diff
changeset
|
377 |
#(7 3 9 10 99) asSortedCollection add:5; yourself |
8874 | 378 |
#(7 3 9 10 99) asSortedCollection add:1; yourself |
379 |
#(7 3 9 10 99) asSortedCollection add:1000; yourself |
|
11274
a6f648b1d291
tune adding in order / in reverse order
Claus Gittinger <cg@exept.de>
parents:
11268
diff
changeset
|
380 |
#(7 3 9 10 99) asSortedCollection add:1; yourself |
607 | 381 |
" |
1162
3995101dfa44
changed for new #makeRoomAtIndex:; added comments
Claus Gittinger <cg@exept.de>
parents:
1156
diff
changeset
|
382 |
|
11276 | 383 |
"Modified: / 22-10-2008 / 17:09:39 / cg" |
1 | 384 |
! |
385 |
||
386 |
addAll:aCollection |
|
8874 | 387 |
"add all elements of the argument, aCollection to the receiver. |
5028
1f7e943ce46e
use my sortBlock when merge-sorting
Claus Gittinger <cg@exept.de>
parents:
4596
diff
changeset
|
388 |
Returns the argument, aCollection (sigh)." |
1173
1d831f2c0d44
added #mergeSorted; changed #addAll: to make use of it
Claus Gittinger <cg@exept.de>
parents:
1167
diff
changeset
|
389 |
|
11286 | 390 |
|addedCollection mySize numAdded| |
391 |
||
392 |
numAdded := aCollection size. |
|
393 |
mySize := self size. |
|
1 | 394 |
|
5359
396b77b6f1d2
added #isSortedCollection, #isSortedBy:
Claus Gittinger <cg@exept.de>
parents:
5048
diff
changeset
|
395 |
(aCollection isSortedCollection |
7554 | 396 |
and:[aCollection sortBlock == sortBlock]) ifTrue:[ |
11286 | 397 |
addedCollection := aCollection. |
5030
655a0f0a60c3
use my sortBlock when merge-sorting
Claus Gittinger <cg@exept.de>
parents:
5029
diff
changeset
|
398 |
] ifFalse:[ |
11286 | 399 |
addedCollection := Array withAll:aCollection. |
14101 | 400 |
addedCollection stableSort:sortBlock. |
5030
655a0f0a60c3
use my sortBlock when merge-sorting
Claus Gittinger <cg@exept.de>
parents:
5029
diff
changeset
|
401 |
|
11286 | 402 |
mySize == 0 ifTrue:[ |
403 |
"/ special case: I am empty - add them en-bloque. |
|
404 |
contentsArray := addedCollection. |
|
405 |
firstIndex := 1. |
|
406 |
lastIndex := numAdded. |
|
407 |
^ aCollection |
|
408 |
]. |
|
1 | 409 |
]. |
1173
1d831f2c0d44
added #mergeSorted; changed #addAll: to make use of it
Claus Gittinger <cg@exept.de>
parents:
1167
diff
changeset
|
410 |
|
1d831f2c0d44
added #mergeSorted; changed #addAll: to make use of it
Claus Gittinger <cg@exept.de>
parents:
1167
diff
changeset
|
411 |
"/ |
5030
655a0f0a60c3
use my sortBlock when merge-sorting
Claus Gittinger <cg@exept.de>
parents:
5029
diff
changeset
|
412 |
"/ do a mergeSort with the sortedContents |
1173
1d831f2c0d44
added #mergeSorted; changed #addAll: to make use of it
Claus Gittinger <cg@exept.de>
parents:
1167
diff
changeset
|
413 |
"/ |
5030
655a0f0a60c3
use my sortBlock when merge-sorting
Claus Gittinger <cg@exept.de>
parents:
5029
diff
changeset
|
414 |
self mergeSorted:addedCollection. |
1173
1d831f2c0d44
added #mergeSorted; changed #addAll: to make use of it
Claus Gittinger <cg@exept.de>
parents:
1167
diff
changeset
|
415 |
^ aCollection |
1 | 416 |
|
77 | 417 |
" |
8874 | 418 |
#(7 3 9 10 99) asSortedCollection addAll:#(77 0 1 16 5); yourself |
5030
655a0f0a60c3
use my sortBlock when merge-sorting
Claus Gittinger <cg@exept.de>
parents:
5029
diff
changeset
|
419 |
|
5028
1f7e943ce46e
use my sortBlock when merge-sorting
Claus Gittinger <cg@exept.de>
parents:
4596
diff
changeset
|
420 |
( #(7 3 9 10 99) asSortedCollection:[:a :b | a > b]) |
11286 | 421 |
addAll:#(77 0 1 16 5); yourself |
5030
655a0f0a60c3
use my sortBlock when merge-sorting
Claus Gittinger <cg@exept.de>
parents:
5029
diff
changeset
|
422 |
|
8874 | 423 |
#(7 3 9 10 99) asSortedCollection |
11286 | 424 |
addAll:( #(77 0 1 16 5) asSortedCollection:[:a :b | a > b]); yourself |
5030
655a0f0a60c3
use my sortBlock when merge-sorting
Claus Gittinger <cg@exept.de>
parents:
5029
diff
changeset
|
425 |
|
8874 | 426 |
(#(7 3 9 10 99) asSortedCollection:[:a :b | a > b]) |
11286 | 427 |
addAll:( #(77 0 1 16 5) asSortedCollection:[:a :b | a < b]); yourself |
428 |
" |
|
429 |
||
430 |
" |
|
431 |
|x e| |
|
432 |
||
433 |
e := (1 to:100) asSortedCollection. |
|
434 |
TimeDuration toRun:[ |
|
435 |
10000 timesRepeat:[ |
|
436 |
x := SortedCollection new:100. |
|
437 |
x addAll:e. |
|
438 |
]. |
|
439 |
]. |
|
77 | 440 |
" |
1173
1d831f2c0d44
added #mergeSorted; changed #addAll: to make use of it
Claus Gittinger <cg@exept.de>
parents:
1167
diff
changeset
|
441 |
|
1d831f2c0d44
added #mergeSorted; changed #addAll: to make use of it
Claus Gittinger <cg@exept.de>
parents:
1167
diff
changeset
|
442 |
"Modified: 13.4.1996 / 12:42:15 / cg" |
1 | 443 |
! |
444 |
||
1173
1d831f2c0d44
added #mergeSorted; changed #addAll: to make use of it
Claus Gittinger <cg@exept.de>
parents:
1167
diff
changeset
|
445 |
mergeSorted:aSortedCollection |
11286 | 446 |
"add all elements of the argument, aSortedCollection to the receiver. |
12038 | 447 |
This leads to an error, if the argument is not sorted. |
1173
1d831f2c0d44
added #mergeSorted; changed #addAll: to make use of it
Claus Gittinger <cg@exept.de>
parents:
1167
diff
changeset
|
448 |
|
8874 | 449 |
This should be used when a number of elements is to be added. |
1173
1d831f2c0d44
added #mergeSorted; changed #addAll: to make use of it
Claus Gittinger <cg@exept.de>
parents:
1167
diff
changeset
|
450 |
Notice, that quicksort degenerates to a veeery slow bubble-like |
1d831f2c0d44
added #mergeSorted; changed #addAll: to make use of it
Claus Gittinger <cg@exept.de>
parents:
1167
diff
changeset
|
451 |
sort when a collection of already sorted elements is given to it. |
1d831f2c0d44
added #mergeSorted; changed #addAll: to make use of it
Claus Gittinger <cg@exept.de>
parents:
1167
diff
changeset
|
452 |
Therefore, adding chunks is better done by sorting the chunk and merging |
14310 | 453 |
it in, instead of resorting the receiver. |
454 |
||
455 |
aSortedCollection must be sorted by the same sortBlock as myself!!" |
|
1173
1d831f2c0d44
added #mergeSorted; changed #addAll: to make use of it
Claus Gittinger <cg@exept.de>
parents:
1167
diff
changeset
|
456 |
|
8874 | 457 |
|newContentsArray |
1173
1d831f2c0d44
added #mergeSorted; changed #addAll: to make use of it
Claus Gittinger <cg@exept.de>
parents:
1167
diff
changeset
|
458 |
contentsArray2 |
1d831f2c0d44
added #mergeSorted; changed #addAll: to make use of it
Claus Gittinger <cg@exept.de>
parents:
1167
diff
changeset
|
459 |
destIndex "{ Class: SmallInteger }" |
1d831f2c0d44
added #mergeSorted; changed #addAll: to make use of it
Claus Gittinger <cg@exept.de>
parents:
1167
diff
changeset
|
460 |
n1 "{ Class: SmallInteger }" |
1d831f2c0d44
added #mergeSorted; changed #addAll: to make use of it
Claus Gittinger <cg@exept.de>
parents:
1167
diff
changeset
|
461 |
n2 "{ Class: SmallInteger }" |
1d831f2c0d44
added #mergeSorted; changed #addAll: to make use of it
Claus Gittinger <cg@exept.de>
parents:
1167
diff
changeset
|
462 |
srcIndex1 "{ Class: SmallInteger }" |
1d831f2c0d44
added #mergeSorted; changed #addAll: to make use of it
Claus Gittinger <cg@exept.de>
parents:
1167
diff
changeset
|
463 |
srcIndex2 "{ Class: SmallInteger }" |
1d831f2c0d44
added #mergeSorted; changed #addAll: to make use of it
Claus Gittinger <cg@exept.de>
parents:
1167
diff
changeset
|
464 |
last1 "{ Class: SmallInteger }" |
8874 | 465 |
last2 "{ Class: SmallInteger }" |
1173
1d831f2c0d44
added #mergeSorted; changed #addAll: to make use of it
Claus Gittinger <cg@exept.de>
parents:
1167
diff
changeset
|
466 |
end1Reached end2Reached |
1d831f2c0d44
added #mergeSorted; changed #addAll: to make use of it
Claus Gittinger <cg@exept.de>
parents:
1167
diff
changeset
|
467 |
el1 el2 | |
1d831f2c0d44
added #mergeSorted; changed #addAll: to make use of it
Claus Gittinger <cg@exept.de>
parents:
1167
diff
changeset
|
468 |
|
14310 | 469 |
n2 := aSortedCollection size. |
470 |
n2 == 0 ifTrue:[ |
|
471 |
^ self. |
|
472 |
]. |
|
473 |
||
474 |
aSortedCollection isSortedCollection ifTrue:[ |
|
475 |
contentsArray2 := aSortedCollection contentsArray. |
|
476 |
srcIndex2 := aSortedCollection firstIndex. |
|
477 |
] ifFalse:[ |
|
478 |
contentsArray2 := aSortedCollection. |
|
479 |
srcIndex2 := 1. |
|
480 |
]. |
|
481 |
||
1173
1d831f2c0d44
added #mergeSorted; changed #addAll: to make use of it
Claus Gittinger <cg@exept.de>
parents:
1167
diff
changeset
|
482 |
n1 := self size. |
5381
914e310a69be
Fix #mergeSorted if one of the collections is empty.
Stefan Vogel <sv@exept.de>
parents:
5359
diff
changeset
|
483 |
n1 == 0 ifTrue:[ |
14310 | 484 |
firstIndex := srcIndex2. |
485 |
lastIndex := firstIndex + n2 - 1. |
|
486 |
contentsArray := contentsArray2 copy. |
|
11286 | 487 |
^ self. |
5381
914e310a69be
Fix #mergeSorted if one of the collections is empty.
Stefan Vogel <sv@exept.de>
parents:
5359
diff
changeset
|
488 |
]. |
914e310a69be
Fix #mergeSorted if one of the collections is empty.
Stefan Vogel <sv@exept.de>
parents:
5359
diff
changeset
|
489 |
|
1173
1d831f2c0d44
added #mergeSorted; changed #addAll: to make use of it
Claus Gittinger <cg@exept.de>
parents:
1167
diff
changeset
|
490 |
newContentsArray := Array new:(n1 + n2). |
1d831f2c0d44
added #mergeSorted; changed #addAll: to make use of it
Claus Gittinger <cg@exept.de>
parents:
1167
diff
changeset
|
491 |
destIndex := 1. |
1d831f2c0d44
added #mergeSorted; changed #addAll: to make use of it
Claus Gittinger <cg@exept.de>
parents:
1167
diff
changeset
|
492 |
|
1d831f2c0d44
added #mergeSorted; changed #addAll: to make use of it
Claus Gittinger <cg@exept.de>
parents:
1167
diff
changeset
|
493 |
last2 := srcIndex2 + n2 -1. |
1d831f2c0d44
added #mergeSorted; changed #addAll: to make use of it
Claus Gittinger <cg@exept.de>
parents:
1167
diff
changeset
|
494 |
|
1d831f2c0d44
added #mergeSorted; changed #addAll: to make use of it
Claus Gittinger <cg@exept.de>
parents:
1167
diff
changeset
|
495 |
srcIndex1 := firstIndex. |
1d831f2c0d44
added #mergeSorted; changed #addAll: to make use of it
Claus Gittinger <cg@exept.de>
parents:
1167
diff
changeset
|
496 |
last1 := srcIndex1 + n1 -1. |
1d831f2c0d44
added #mergeSorted; changed #addAll: to make use of it
Claus Gittinger <cg@exept.de>
parents:
1167
diff
changeset
|
497 |
|
1d831f2c0d44
added #mergeSorted; changed #addAll: to make use of it
Claus Gittinger <cg@exept.de>
parents:
1167
diff
changeset
|
498 |
(srcIndex1 <= last1 and:[srcIndex2 <= last2]) ifTrue:[ |
11286 | 499 |
el1 := contentsArray at:srcIndex1. |
500 |
el2 := contentsArray2 at:srcIndex2. |
|
501 |
end1Reached := end2Reached := false. |
|
1173
1d831f2c0d44
added #mergeSorted; changed #addAll: to make use of it
Claus Gittinger <cg@exept.de>
parents:
1167
diff
changeset
|
502 |
|
11286 | 503 |
[end1Reached or:[end2Reached]] whileFalse:[ |
504 |
(sortBlock value:el1 value:el2) ifTrue:[ |
|
505 |
"/ el1 to come before el2 |
|
506 |
newContentsArray at:destIndex put:el1. destIndex := destIndex + 1. |
|
507 |
srcIndex1 := srcIndex1 + 1. |
|
508 |
srcIndex1 <= last1 ifTrue:[ |
|
509 |
el1 := contentsArray at:srcIndex1. |
|
510 |
] ifFalse:[ |
|
511 |
end1Reached := true |
|
512 |
] |
|
513 |
] ifFalse:[ |
|
514 |
"/ el2 to come before el1 |
|
515 |
newContentsArray at:destIndex put:el2. destIndex := destIndex + 1. |
|
516 |
srcIndex2 := srcIndex2 + 1. |
|
517 |
srcIndex2 <= last2 ifTrue:[ |
|
518 |
el2 := contentsArray2 at:srcIndex2. |
|
519 |
] ifFalse:[ |
|
520 |
end2Reached := true |
|
521 |
] |
|
522 |
] |
|
523 |
] |
|
1173
1d831f2c0d44
added #mergeSorted; changed #addAll: to make use of it
Claus Gittinger <cg@exept.de>
parents:
1167
diff
changeset
|
524 |
]. |
1d831f2c0d44
added #mergeSorted; changed #addAll: to make use of it
Claus Gittinger <cg@exept.de>
parents:
1167
diff
changeset
|
525 |
|
1d831f2c0d44
added #mergeSorted; changed #addAll: to make use of it
Claus Gittinger <cg@exept.de>
parents:
1167
diff
changeset
|
526 |
"/ fill up with remaining elements from source1 |
1d831f2c0d44
added #mergeSorted; changed #addAll: to make use of it
Claus Gittinger <cg@exept.de>
parents:
1167
diff
changeset
|
527 |
(srcIndex1 <= last1) ifTrue:[ |
11286 | 528 |
newContentsArray |
529 |
replaceFrom:destIndex |
|
530 |
to:(destIndex+(last1-srcIndex1)) |
|
531 |
with:contentsArray |
|
532 |
startingAt:srcIndex1 |
|
1173
1d831f2c0d44
added #mergeSorted; changed #addAll: to make use of it
Claus Gittinger <cg@exept.de>
parents:
1167
diff
changeset
|
533 |
]. |
1d831f2c0d44
added #mergeSorted; changed #addAll: to make use of it
Claus Gittinger <cg@exept.de>
parents:
1167
diff
changeset
|
534 |
|
1d831f2c0d44
added #mergeSorted; changed #addAll: to make use of it
Claus Gittinger <cg@exept.de>
parents:
1167
diff
changeset
|
535 |
"/ fill up with remaining elements from source2 |
1d831f2c0d44
added #mergeSorted; changed #addAll: to make use of it
Claus Gittinger <cg@exept.de>
parents:
1167
diff
changeset
|
536 |
(srcIndex2 <= last2) ifTrue:[ |
11286 | 537 |
newContentsArray |
538 |
replaceFrom:destIndex |
|
539 |
to:(destIndex+(last2-srcIndex2)) |
|
540 |
with:contentsArray2 |
|
541 |
startingAt:srcIndex2 |
|
1173
1d831f2c0d44
added #mergeSorted; changed #addAll: to make use of it
Claus Gittinger <cg@exept.de>
parents:
1167
diff
changeset
|
542 |
]. |
1d831f2c0d44
added #mergeSorted; changed #addAll: to make use of it
Claus Gittinger <cg@exept.de>
parents:
1167
diff
changeset
|
543 |
|
1d831f2c0d44
added #mergeSorted; changed #addAll: to make use of it
Claus Gittinger <cg@exept.de>
parents:
1167
diff
changeset
|
544 |
firstIndex := 1. |
1d831f2c0d44
added #mergeSorted; changed #addAll: to make use of it
Claus Gittinger <cg@exept.de>
parents:
1167
diff
changeset
|
545 |
lastIndex := n1 + n2. |
1d831f2c0d44
added #mergeSorted; changed #addAll: to make use of it
Claus Gittinger <cg@exept.de>
parents:
1167
diff
changeset
|
546 |
contentsArray := newContentsArray |
1d831f2c0d44
added #mergeSorted; changed #addAll: to make use of it
Claus Gittinger <cg@exept.de>
parents:
1167
diff
changeset
|
547 |
|
1d831f2c0d44
added #mergeSorted; changed #addAll: to make use of it
Claus Gittinger <cg@exept.de>
parents:
1167
diff
changeset
|
548 |
" |
8874 | 549 |
#(7 3 9 10 99) asSortedCollection |
11286 | 550 |
mergeSorted:#(77 0 1 16 5) asSortedCollection |
1173
1d831f2c0d44
added #mergeSorted; changed #addAll: to make use of it
Claus Gittinger <cg@exept.de>
parents:
1167
diff
changeset
|
551 |
|
8874 | 552 |
#(7 3 9 10 99) asSortedCollection |
11286 | 553 |
mergeSorted:#(77 0 3 1 98 99 16 5) asSortedCollection |
1173
1d831f2c0d44
added #mergeSorted; changed #addAll: to make use of it
Claus Gittinger <cg@exept.de>
parents:
1167
diff
changeset
|
554 |
|
8874 | 555 |
#() asSortedCollection |
11286 | 556 |
mergeSorted:#(77 0 3 1 98 99 16 5) asSortedCollection |
1173
1d831f2c0d44
added #mergeSorted; changed #addAll: to make use of it
Claus Gittinger <cg@exept.de>
parents:
1167
diff
changeset
|
557 |
|
8874 | 558 |
#(7 3 9 10 99) asSortedCollection |
11286 | 559 |
mergeSorted:#() asSortedCollection |
1173
1d831f2c0d44
added #mergeSorted; changed #addAll: to make use of it
Claus Gittinger <cg@exept.de>
parents:
1167
diff
changeset
|
560 |
" |
1d831f2c0d44
added #mergeSorted; changed #addAll: to make use of it
Claus Gittinger <cg@exept.de>
parents:
1167
diff
changeset
|
561 |
|
3250
c4b444774f1c
oops - mergesort cannot simply copy remaining
Claus Gittinger <cg@exept.de>
parents:
2929
diff
changeset
|
562 |
"Modified: / 30.1.1998 / 01:49:42 / cg" |
607 | 563 |
! ! |
564 |
||
5560 | 565 |
!SortedCollection methodsFor:'blocked'! |
566 |
||
567 |
add:newObject after:oldObject |
|
568 |
"catch this - its not allowed for sortedCollections" |
|
569 |
||
570 |
self shouldNotImplement |
|
571 |
! |
|
572 |
||
573 |
add:newObject before:oldObject |
|
574 |
"catch this - its not allowed for sortedCollections" |
|
575 |
||
576 |
self shouldNotImplement |
|
577 |
! |
|
578 |
||
579 |
addFirst:anObject |
|
580 |
"catch this - its not allowed for sortedCollections" |
|
581 |
||
582 |
self shouldNotImplement |
|
583 |
! |
|
584 |
||
585 |
addLast:anObject |
|
586 |
"catch this - its not allowed for sortedCollections" |
|
587 |
||
588 |
self shouldNotImplement |
|
589 |
! ! |
|
590 |
||
607 | 591 |
!SortedCollection methodsFor:'converting'! |
592 |
||
593 |
asSortedCollection |
|
594 |
"return the receiver as a sorted collection" |
|
595 |
||
596 |
"could be an instance of a subclass..." |
|
597 |
self class == SortedCollection ifTrue:[ |
|
8874 | 598 |
sortBlock == DefaultSortBlock ifTrue:[ |
599 |
^ self |
|
600 |
] |
|
1 | 601 |
]. |
607 | 602 |
^ super asSortedCollection |
5029
ae3312dda1dd
avoid creation of a new sortedCollection in #asSortedCollection:
Claus Gittinger <cg@exept.de>
parents:
5028
diff
changeset
|
603 |
! |
ae3312dda1dd
avoid creation of a new sortedCollection in #asSortedCollection:
Claus Gittinger <cg@exept.de>
parents:
5028
diff
changeset
|
604 |
|
ae3312dda1dd
avoid creation of a new sortedCollection in #asSortedCollection:
Claus Gittinger <cg@exept.de>
parents:
5028
diff
changeset
|
605 |
asSortedCollection:aSortBlock |
ae3312dda1dd
avoid creation of a new sortedCollection in #asSortedCollection:
Claus Gittinger <cg@exept.de>
parents:
5028
diff
changeset
|
606 |
"return the receiver as a sorted collection, using aSortBlock. |
ae3312dda1dd
avoid creation of a new sortedCollection in #asSortedCollection:
Claus Gittinger <cg@exept.de>
parents:
5028
diff
changeset
|
607 |
Return the receiver, if its a sortedCollection and the sortBlock |
ae3312dda1dd
avoid creation of a new sortedCollection in #asSortedCollection:
Claus Gittinger <cg@exept.de>
parents:
5028
diff
changeset
|
608 |
is the same as the argument-sortBlock" |
ae3312dda1dd
avoid creation of a new sortedCollection in #asSortedCollection:
Claus Gittinger <cg@exept.de>
parents:
5028
diff
changeset
|
609 |
|
ae3312dda1dd
avoid creation of a new sortedCollection in #asSortedCollection:
Claus Gittinger <cg@exept.de>
parents:
5028
diff
changeset
|
610 |
"could be an instance of a subclass..." |
ae3312dda1dd
avoid creation of a new sortedCollection in #asSortedCollection:
Claus Gittinger <cg@exept.de>
parents:
5028
diff
changeset
|
611 |
self class == SortedCollection ifTrue:[ |
8874 | 612 |
"/ if the sortBlock is the same, return the receiver |
613 |
aSortBlock == sortBlock ifTrue:[ |
|
614 |
^ self |
|
615 |
]. |
|
5029
ae3312dda1dd
avoid creation of a new sortedCollection in #asSortedCollection:
Claus Gittinger <cg@exept.de>
parents:
5028
diff
changeset
|
616 |
]. |
5030
655a0f0a60c3
use my sortBlock when merge-sorting
Claus Gittinger <cg@exept.de>
parents:
5029
diff
changeset
|
617 |
^ super asSortedCollection:aSortBlock |
1 | 618 |
! ! |
619 |
||
95 | 620 |
!SortedCollection methodsFor:'copying'! |
621 |
||
607 | 622 |
copyEmpty:size |
623 |
"return a copy of the receiver with no elements, but |
|
624 |
the same size. This method has been be redefined to |
|
625 |
preserve the sortBlock." |
|
626 |
||
14110 | 627 |
^ (super copyEmpty:size) sortBlock:sortBlock |
607 | 628 |
! |
629 |
||
159 | 630 |
postCopyFrom:anOriginal |
631 |
"sent after a copy or when a new collection species has been created. |
|
95 | 632 |
The new collection should have the same sortBlock as the original." |
633 |
||
159 | 634 |
sortBlock := anOriginal sortBlock |
95 | 635 |
|
636 |
" |
|
637 |
#(4 7 1 99 -1 17) asSortedCollection inspect |
|
159 | 638 |
#(4 7 1 99 -1 17) asSortedCollection copy inspect |
95 | 639 |
(#(4 7 1 99 -1 17) asSortedCollection sortBlock:[:a :b | a > b]) inspect |
159 | 640 |
(#(4 7 1 99 -1 17) asSortedCollection sortBlock:[:a :b | a > b]) copy inspect |
641 |
(#(4 7 1 99 -1 17) asSortedCollection select:[:e| e even]) inspect |
|
95 | 642 |
" |
643 |
! ! |
|
644 |
||
216 | 645 |
!SortedCollection methodsFor:'enumerating'! |
184 | 646 |
|
647 |
collect:aBlock |
|
648 |
"evaluate the argument, aBlock for every element in the collection |
|
649 |
and return a collection of the results. Redefined to return an OrderedCollection; |
|
650 |
see X3J20 spec. (SortedCollection>>collect: should return an OrderedCollection)" |
|
651 |
||
652 |
|newCollection |
|
653 |
start "{ Class:SmallInteger }" |
|
654 |
stop "{ Class:SmallInteger }" | |
|
655 |
||
656 |
newCollection := OrderedCollection new:(self size). |
|
657 |
stop := lastIndex. |
|
658 |
start := firstIndex. |
|
659 |
start to:stop do:[:index | |
|
660 |
newCollection add:(aBlock value:(contentsArray at:index)). |
|
661 |
]. |
|
662 |
^ newCollection |
|
663 |
! ! |
|
664 |
||
607 | 665 |
!SortedCollection methodsFor:'instance protocol'! |
666 |
||
5668
0cbaa16dc17c
Inherited #sort: shows a debugger.
Stefan Vogel <sv@exept.de>
parents:
5604
diff
changeset
|
667 |
sort:aSortBlock |
0cbaa16dc17c
Inherited #sort: shows a debugger.
Stefan Vogel <sv@exept.de>
parents:
5604
diff
changeset
|
668 |
"redefined from superclass to change the sortBlock" |
0cbaa16dc17c
Inherited #sort: shows a debugger.
Stefan Vogel <sv@exept.de>
parents:
5604
diff
changeset
|
669 |
|
0cbaa16dc17c
Inherited #sort: shows a debugger.
Stefan Vogel <sv@exept.de>
parents:
5604
diff
changeset
|
670 |
sortBlock ~~ aSortBlock ifTrue:[ |
8874 | 671 |
self sortBlock:aSortBlock. |
5668
0cbaa16dc17c
Inherited #sort: shows a debugger.
Stefan Vogel <sv@exept.de>
parents:
5604
diff
changeset
|
672 |
]. |
0cbaa16dc17c
Inherited #sort: shows a debugger.
Stefan Vogel <sv@exept.de>
parents:
5604
diff
changeset
|
673 |
|
0cbaa16dc17c
Inherited #sort: shows a debugger.
Stefan Vogel <sv@exept.de>
parents:
5604
diff
changeset
|
674 |
! |
0cbaa16dc17c
Inherited #sort: shows a debugger.
Stefan Vogel <sv@exept.de>
parents:
5604
diff
changeset
|
675 |
|
607 | 676 |
sortBlock |
677 |
"return the block used for sorting" |
|
678 |
||
679 |
^ sortBlock |
|
680 |
! |
|
681 |
||
682 |
sortBlock:aSortBlock |
|
8874 | 683 |
"change the sort criteria for a sorted collection, resort the elements of |
607 | 684 |
the collection, and return the receiver. The argument, aSortBlock must |
685 |
be a two-argument block which returns true if its arg1 has to come before |
|
686 |
its arg2 in the collection." |
|
687 |
||
688 |
sortBlock := aSortBlock. |
|
689 |
lastIndex > firstIndex ifTrue:[ |
|
690 |
contentsArray quickSortFrom:firstIndex to:lastIndex sortBlock:aSortBlock |
|
691 |
] |
|
692 |
||
693 |
" |
|
694 |
#(9 8 7 6 5 4 3) asSortedCollection |
|
695 |
#(9 8 7 6 5 4 3) asSortedCollection sortBlock:[:a : b | a < b] |
|
696 |
#(9 8 7 6 5 4 3) asSortedCollection sortBlock:[:a : b | a > b] |
|
697 |
#($f $G $z $Y $o $H) asSortedCollection |
|
698 |
#($f $G $z $Y $o $H) asSortedCollection sortBlock:[:a : b | a asUppercase < b asUppercase] |
|
699 |
" |
|
700 |
! ! |
|
701 |
||
702 |
!SortedCollection methodsFor:'private'! |
|
703 |
||
704 |
setSortBlock: aSortBlock |
|
705 |
"set the sortblock without resorting - private only" |
|
706 |
||
707 |
sortBlock := aSortBlock |
|
708 |
! ! |
|
709 |
||
1173
1d831f2c0d44
added #mergeSorted; changed #addAll: to make use of it
Claus Gittinger <cg@exept.de>
parents:
1167
diff
changeset
|
710 |
!SortedCollection methodsFor:'queries'! |
1d831f2c0d44
added #mergeSorted; changed #addAll: to make use of it
Claus Gittinger <cg@exept.de>
parents:
1167
diff
changeset
|
711 |
|
1d831f2c0d44
added #mergeSorted; changed #addAll: to make use of it
Claus Gittinger <cg@exept.de>
parents:
1167
diff
changeset
|
712 |
isSorted |
5359
396b77b6f1d2
added #isSortedCollection, #isSortedBy:
Claus Gittinger <cg@exept.de>
parents:
5048
diff
changeset
|
713 |
"return true. if my elements are sorted" |
396b77b6f1d2
added #isSortedCollection, #isSortedBy:
Claus Gittinger <cg@exept.de>
parents:
5048
diff
changeset
|
714 |
|
1173
1d831f2c0d44
added #mergeSorted; changed #addAll: to make use of it
Claus Gittinger <cg@exept.de>
parents:
1167
diff
changeset
|
715 |
^ true |
5359
396b77b6f1d2
added #isSortedCollection, #isSortedBy:
Claus Gittinger <cg@exept.de>
parents:
5048
diff
changeset
|
716 |
! |
396b77b6f1d2
added #isSortedCollection, #isSortedBy:
Claus Gittinger <cg@exept.de>
parents:
5048
diff
changeset
|
717 |
|
396b77b6f1d2
added #isSortedCollection, #isSortedBy:
Claus Gittinger <cg@exept.de>
parents:
5048
diff
changeset
|
718 |
isSortedBy:aBlock |
396b77b6f1d2
added #isSortedCollection, #isSortedBy:
Claus Gittinger <cg@exept.de>
parents:
5048
diff
changeset
|
719 |
"return true, if my elements are sorted (already) by the given criterion (sortBlock)." |
1173
1d831f2c0d44
added #mergeSorted; changed #addAll: to make use of it
Claus Gittinger <cg@exept.de>
parents:
1167
diff
changeset
|
720 |
|
5359
396b77b6f1d2
added #isSortedCollection, #isSortedBy:
Claus Gittinger <cg@exept.de>
parents:
5048
diff
changeset
|
721 |
aBlock == sortBlock ifTrue:[^ true]. |
396b77b6f1d2
added #isSortedCollection, #isSortedBy:
Claus Gittinger <cg@exept.de>
parents:
5048
diff
changeset
|
722 |
^ super isSortedBy:aBlock |
396b77b6f1d2
added #isSortedCollection, #isSortedBy:
Claus Gittinger <cg@exept.de>
parents:
5048
diff
changeset
|
723 |
|
396b77b6f1d2
added #isSortedCollection, #isSortedBy:
Claus Gittinger <cg@exept.de>
parents:
5048
diff
changeset
|
724 |
|
396b77b6f1d2
added #isSortedCollection, #isSortedBy:
Claus Gittinger <cg@exept.de>
parents:
5048
diff
changeset
|
725 |
! |
396b77b6f1d2
added #isSortedCollection, #isSortedBy:
Claus Gittinger <cg@exept.de>
parents:
5048
diff
changeset
|
726 |
|
396b77b6f1d2
added #isSortedCollection, #isSortedBy:
Claus Gittinger <cg@exept.de>
parents:
5048
diff
changeset
|
727 |
isSortedCollection |
396b77b6f1d2
added #isSortedCollection, #isSortedBy:
Claus Gittinger <cg@exept.de>
parents:
5048
diff
changeset
|
728 |
"return true. if I am a sorted collection" |
396b77b6f1d2
added #isSortedCollection, #isSortedBy:
Claus Gittinger <cg@exept.de>
parents:
5048
diff
changeset
|
729 |
|
396b77b6f1d2
added #isSortedCollection, #isSortedBy:
Claus Gittinger <cg@exept.de>
parents:
5048
diff
changeset
|
730 |
^ true |
1173
1d831f2c0d44
added #mergeSorted; changed #addAll: to make use of it
Claus Gittinger <cg@exept.de>
parents:
1167
diff
changeset
|
731 |
! ! |
1d831f2c0d44
added #mergeSorted; changed #addAll: to make use of it
Claus Gittinger <cg@exept.de>
parents:
1167
diff
changeset
|
732 |
|
607 | 733 |
!SortedCollection methodsFor:'searching'! |
734 |
||
735 |
after:anObject ifAbsent:exceptionBlock |
|
736 |
"return the element after the argument, anObject; or nil if there is none. |
|
737 |
If anObject is contained multiple times in the collection, return the |
|
738 |
the first element which is non-equal to anObject. |
|
739 |
If the receiver does not contain anObject, return the result from evaluating |
|
740 |
exceptionBlock." |
|
741 |
||
1162
3995101dfa44
changed for new #makeRoomAtIndex:; added comments
Claus Gittinger <cg@exept.de>
parents:
1156
diff
changeset
|
742 |
|index "{ Class: SmallInteger }" |
3995101dfa44
changed for new #makeRoomAtIndex:; added comments
Claus Gittinger <cg@exept.de>
parents:
1156
diff
changeset
|
743 |
last "{ Class: SmallInteger }"| |
607 | 744 |
|
745 |
index := self indexForInserting:anObject. |
|
8874 | 746 |
((index < firstIndex) |
607 | 747 |
or:[(contentsArray at:index) ~= anObject]) ifTrue:[^ exceptionBlock value]. |
748 |
||
8874 | 749 |
"skip multiple occurrences of the same ..." |
607 | 750 |
|
1162
3995101dfa44
changed for new #makeRoomAtIndex:; added comments
Claus Gittinger <cg@exept.de>
parents:
1156
diff
changeset
|
751 |
last := lastIndex. |
3995101dfa44
changed for new #makeRoomAtIndex:; added comments
Claus Gittinger <cg@exept.de>
parents:
1156
diff
changeset
|
752 |
[(index <= last) and:[(contentsArray at:index) = anObject]] whileTrue:[ |
8874 | 753 |
index := index + 1 |
607 | 754 |
]. |
1162
3995101dfa44
changed for new #makeRoomAtIndex:; added comments
Claus Gittinger <cg@exept.de>
parents:
1156
diff
changeset
|
755 |
(index > last) ifTrue:[^ nil]. |
607 | 756 |
^ contentsArray at:index |
1162
3995101dfa44
changed for new #makeRoomAtIndex:; added comments
Claus Gittinger <cg@exept.de>
parents:
1156
diff
changeset
|
757 |
|
3995101dfa44
changed for new #makeRoomAtIndex:; added comments
Claus Gittinger <cg@exept.de>
parents:
1156
diff
changeset
|
758 |
"Modified: 12.4.1996 / 13:20:33 / cg" |
607 | 759 |
! |
760 |
||
761 |
before:anObject ifAbsent:exceptionBlock |
|
762 |
"return the element before the argument, anObject; or nil if there is none. |
|
763 |
If the receiver does not contain anObject, return the result from evaluating |
|
764 |
exceptionBlock." |
|
765 |
||
766 |
|index "{ Class: SmallInteger }"| |
|
767 |
||
768 |
index := self indexForInserting:anObject. |
|
8874 | 769 |
((index <= firstIndex) |
607 | 770 |
or:[(contentsArray at:index) ~= anObject]) ifTrue:[^ exceptionBlock value]. |
771 |
||
772 |
^ contentsArray at:index - 1 |
|
773 |
||
774 |
" |
|
775 |
#(7 3 9 10 99) asSortedCollection before:50 |
|
8874 | 776 |
#(7 3 9 10 99) asSortedCollection before:1 |
777 |
#(7 3 9 10 99) asSortedCollection before:10 |
|
778 |
#(7 3 9 10 99) asSortedCollection before:7 |
|
779 |
#(7 3 9 10 99) asSortedCollection before:99 |
|
780 |
#(7 10 3 10 9 10 10 99) asSortedCollection before:9 |
|
781 |
#(7 10 3 10 9 10 10 99) asSortedCollection before:10 |
|
607 | 782 |
" |
4596 | 783 |
! |
784 |
||
14310 | 785 |
indexForInserting:anObject |
786 |
"search the index at which to insert anObject. |
|
787 |
Can also be used to search for an existing element |
|
788 |
by checking if the element at the returned index is the one we look for. |
|
789 |
Uses a binarySearch since we can depend on the elements being in sorted order. |
|
790 |
The returned index is a physical one, for accessing contentsArray." |
|
791 |
||
792 |
|low "{ Class: SmallInteger}" |
|
793 |
high "{ Class: SmallInteger}" |
|
794 |
middle "{ Class: SmallInteger}" |
|
795 |
element| |
|
796 |
||
797 |
" |
|
798 |
we can of course use a binary search - since the elements are sorted |
|
799 |
" |
|
800 |
low := firstIndex. |
|
801 |
high := lastIndex. |
|
802 |
[low > high] whileFalse:[ |
|
803 |
middle := (low + high) // 2. |
|
804 |
element := contentsArray at:middle. |
|
805 |
(sortBlock value:element value:anObject) ifTrue:[ |
|
806 |
"middleelement is smaller than object" |
|
807 |
low := middle + 1 |
|
808 |
] ifFalse:[ |
|
809 |
high := middle - 1 |
|
810 |
] |
|
811 |
]. |
|
812 |
^ low |
|
813 |
||
814 |
" |
|
815 |
#(1 2 3 4 7 99 1313 981989 898989898) asSortedCollection indexForInserting:50 |
|
816 |
||
817 |
#(1.0 2.0 3 4 7 49.0 51.0 99 1313 981989 898989898) asSortedCollection indexForInserting:50 |
|
818 |
||
819 |
" |
|
820 |
||
821 |
"Modified: 12.4.1996 / 13:22:03 / cg" |
|
822 |
! |
|
823 |
||
4596 | 824 |
indexOf:anElement |
8874 | 825 |
"Return the index of anElement within the receiver. |
4596 | 826 |
If the receiver does not contain anElement, return 0." |
827 |
||
828 |
^ self indexOf:anElement ifAbsent:0 |
|
829 |
! |
|
830 |
||
831 |
indexOf:anElement ifAbsent:exceptionBlock |
|
8874 | 832 |
"Return the index of anElement within the receiver. |
833 |
If the receiver does not contain anElement, |
|
4596 | 834 |
return the result of evaluating the argument, exceptionBlock." |
835 |
||
8874 | 836 |
|insertionIndex index "{ Class: SmallInteger }" |
4596 | 837 |
obj| |
838 |
||
839 |
firstIndex > lastIndex ifTrue:[ |
|
8874 | 840 |
"/ empty |
841 |
^ exceptionBlock value |
|
4596 | 842 |
]. |
843 |
||
844 |
"/ if I am small, the inherited linear search is faster ... |
|
845 |
(lastIndex - firstIndex) < 20 ifTrue:[ |
|
8874 | 846 |
^ super indexOf:anElement ifAbsent:exceptionBlock |
4596 | 847 |
]. |
848 |
||
849 |
insertionIndex := self indexForInserting:anElement. |
|
850 |
insertionIndex > lastIndex ifTrue:[ |
|
8874 | 851 |
insertionIndex := lastIndex |
4596 | 852 |
] ifFalse:[ |
8874 | 853 |
insertionIndex < firstIndex ifTrue:[ |
854 |
insertionIndex := firstIndex |
|
855 |
] |
|
4596 | 856 |
]. |
857 |
||
858 |
index := insertionIndex. |
|
859 |
[index >= firstIndex |
|
860 |
and:[obj := contentsArray basicAt:index. |
|
8874 | 861 |
anElement = obj ifTrue: [^ index - firstIndex + 1]. |
862 |
[sortBlock value:anElement value:obj]]] |
|
863 |
whileTrue: [index := index - 1]. |
|
4596 | 864 |
|
865 |
index := insertionIndex. |
|
866 |
[index <= lastIndex |
|
867 |
and: [obj := contentsArray basicAt: index. |
|
8874 | 868 |
anElement = obj ifTrue: [^ index - firstIndex + 1]. |
869 |
[sortBlock value:obj value:anElement]]] |
|
870 |
whileTrue: [index := index + 1]. |
|
4596 | 871 |
|
872 |
^exceptionBlock value |
|
873 |
||
874 |
" |
|
875 |
#('aa' 'bb' 'cc' 'dd') asSortedCollection indexOf:'bb' |
|
8874 | 876 |
#('aa' 'bb' 'cc' 'dd' 'aa' 'bb' 'cc' 'dd') asSortedCollection indexOf:'bb' |
4596 | 877 |
|
878 |
|allSyms indices| |
|
8874 | 879 |
allSyms := Symbol allInstances asSortedCollection. |
4596 | 880 |
Time millisecondsToRun:[ |
8874 | 881 |
indices := allSyms collect:[:el | allSyms indexOf:el]. |
4596 | 882 |
]. |
883 |
indices = (1 to:allSyms size) |
|
884 |
" |
|
16002 | 885 |
! |
886 |
||
887 |
largest:n |
|
888 |
"return a collection containing the n largest elements, largest last. |
|
889 |
Raises an exception, if the receiver does not contain at least n elements" |
|
890 |
||
891 |
|mySize| |
|
892 |
||
893 |
mySize := self size. |
|
894 |
n > mySize ifTrue:[ |
|
895 |
self notEnoughElementsError |
|
896 |
]. |
|
897 |
sortBlock == DefaultSortBlock ifTrue:[ |
|
898 |
^ self copyFrom:(mySize-n+1) |
|
899 |
]. |
|
900 |
"/ do not trust the sortblock to sort small-to-large |
|
901 |
^ super largest:n |
|
902 |
||
903 |
" |
|
904 |
#(10 35 20 45 30 5) asSortedCollection largest:3 |
|
905 |
(#(10 35 20 45 30 5) asSortedCollection:[:a :b | a > b]) largest:3 |
|
906 |
||
907 |
#(10 35 20 45 30 5) asSortedCollection largest:6 |
|
908 |
#(10 35 20 45 30 5) asSortedCollection largest:7 |
|
909 |
" |
|
910 |
! |
|
911 |
||
912 |
max |
|
913 |
"Return the largest element." |
|
914 |
||
915 |
sortBlock == DefaultSortBlock ifTrue:[ |
|
916 |
^ self last |
|
917 |
]. |
|
918 |
^ super max |
|
919 |
||
920 |
" |
|
921 |
#(10 35 20 45 30 5) asSortedCollection max |
|
922 |
" |
|
923 |
! |
|
924 |
||
925 |
min |
|
926 |
"Return the smallest element." |
|
927 |
||
928 |
sortBlock == DefaultSortBlock ifTrue:[ |
|
929 |
^ self first |
|
930 |
]. |
|
931 |
^ super min |
|
932 |
||
933 |
" |
|
934 |
#(10 35 20 45 30 5) asSortedCollection min |
|
935 |
" |
|
936 |
! |
|
937 |
||
938 |
smallest:n |
|
939 |
"return a collection containing the n smallest elements, largest last. |
|
940 |
Raises an exception, if the receiver does not contain at least n elements" |
|
941 |
||
942 |
|mySize| |
|
943 |
||
944 |
mySize := self size. |
|
945 |
n > mySize ifTrue:[ |
|
946 |
self notEnoughElementsError |
|
947 |
]. |
|
948 |
sortBlock == DefaultSortBlock ifTrue:[ |
|
949 |
^ self copyTo:n |
|
950 |
]. |
|
951 |
"/ do not trust the sortblock to sort small-to-large |
|
952 |
^ super smallest:n |
|
953 |
||
954 |
" |
|
955 |
#(10 35 20 45 30 5) asSortedCollection smallest:3 |
|
956 |
(#(10 35 20 45 30 5) asSortedCollection:[:a :b | a > b]) smallest:3 |
|
957 |
||
958 |
#(10 35 20 45 30 5) asSortedCollection smallest:6 |
|
959 |
#(10 35 20 45 30 5) asSortedCollection smallest:7 |
|
960 |
" |
|
961 |
! ! |
|
962 |
||
963 |
!SortedCollection methodsFor:'statistical functions'! |
|
964 |
||
965 |
median |
|
966 |
"Return the middle element, or as close as we can get." |
|
967 |
||
968 |
^ self at:(self size + 1 // 2) |
|
969 |
||
970 |
" |
|
971 |
#(10 35 20 45 30 5) asSortedCollection median |
|
972 |
#(10 35 20 45 30 5) median |
|
973 |
" |
|
607 | 974 |
! ! |
975 |
||
1 | 976 |
!SortedCollection methodsFor:'testing'! |
977 |
||
978 |
includes:anObject |
|
979 |
"return true, if the argument, anObject is in the collection. |
|
62 | 980 |
Redefined, since due to being sorted, the inclusion check can |
2 | 981 |
be done with log-n compares i.e. much faster." |
1 | 982 |
|
32 | 983 |
|index "{ Class: SmallInteger }"| |
1 | 984 |
|
77 | 985 |
index := self indexForInserting:anObject. |
32 | 986 |
((index < firstIndex) or:[index > lastIndex]) ifTrue:[^ false]. |
987 |
^ (contentsArray at:index) = anObject |
|
2 | 988 |
|
77 | 989 |
" |
990 |
#(7 3 9 10 99) asSortedCollection includes:50 |
|
991 |
#(7 3 9 10 99) asSortedCollection includes:10 |
|
992 |
" |
|
1 | 993 |
! |
994 |
||
995 |
occurrencesOf:anObject |
|
996 |
"return how many times the argument, anObject is in the collection. |
|
62 | 997 |
Redefined, since due to being sorted, the range of checked objects |
5048 | 998 |
can be limited i.e. it can be done much faster. |
999 |
Uses #= (i.e. equality) compare." |
|
1 | 1000 |
|
1001 |
|index "{ Class: SmallInteger }" |
|
1162
3995101dfa44
changed for new #makeRoomAtIndex:; added comments
Claus Gittinger <cg@exept.de>
parents:
1156
diff
changeset
|
1002 |
tally "{ Class: SmallInteger }" |
3995101dfa44
changed for new #makeRoomAtIndex:; added comments
Claus Gittinger <cg@exept.de>
parents:
1156
diff
changeset
|
1003 |
last "{ Class: SmallInteger }" | |
1 | 1004 |
|
77 | 1005 |
index := self indexForInserting:anObject. |
8874 | 1006 |
last := lastIndex. |
1162
3995101dfa44
changed for new #makeRoomAtIndex:; added comments
Claus Gittinger <cg@exept.de>
parents:
1156
diff
changeset
|
1007 |
((index < firstIndex) or:[index > last]) ifTrue:[^ 0]. |
3995101dfa44
changed for new #makeRoomAtIndex:; added comments
Claus Gittinger <cg@exept.de>
parents:
1156
diff
changeset
|
1008 |
|
3995101dfa44
changed for new #makeRoomAtIndex:; added comments
Claus Gittinger <cg@exept.de>
parents:
1156
diff
changeset
|
1009 |
"/ there may be multiple of them; count 'em |
32 | 1010 |
|
1 | 1011 |
tally := 0. |
1162
3995101dfa44
changed for new #makeRoomAtIndex:; added comments
Claus Gittinger <cg@exept.de>
parents:
1156
diff
changeset
|
1012 |
[(index <= last) and:[(contentsArray at:index) = anObject]] whileTrue:[ |
8874 | 1013 |
tally := tally + 1. |
1014 |
index := index + 1 |
|
1 | 1015 |
]. |
1016 |
^ tally |
|
2 | 1017 |
|
77 | 1018 |
" |
1019 |
#(7 3 9 10 99) asSortedCollection occurrencesOf:50 |
|
1020 |
#(7 3 9 10 99) asSortedCollection occurrencesOf:10 |
|
1021 |
#(7 10 3 10 9 10 10 99) asSortedCollection occurrencesOf:10 |
|
1022 |
" |
|
1162
3995101dfa44
changed for new #makeRoomAtIndex:; added comments
Claus Gittinger <cg@exept.de>
parents:
1156
diff
changeset
|
1023 |
|
3995101dfa44
changed for new #makeRoomAtIndex:; added comments
Claus Gittinger <cg@exept.de>
parents:
1156
diff
changeset
|
1024 |
"Modified: 12.4.1996 / 18:48:40 / cg" |
77 | 1025 |
! ! |
1026 |
||
629 | 1027 |
!SortedCollection class methodsFor:'documentation'! |
1028 |
||
1029 |
version |
|
16002 | 1030 |
^ '$Header: /cvs/stx/stx/libbasic/SortedCollection.st,v 1.78 2014-02-12 14:36:52 cg Exp $' |
14309
602e61cb64a3
Remove now unused helper method
Stefan Vogel <sv@exept.de>
parents:
14308
diff
changeset
|
1031 |
! |
602e61cb64a3
Remove now unused helper method
Stefan Vogel <sv@exept.de>
parents:
14308
diff
changeset
|
1032 |
|
602e61cb64a3
Remove now unused helper method
Stefan Vogel <sv@exept.de>
parents:
14308
diff
changeset
|
1033 |
version_CVS |
16002 | 1034 |
^ '$Header: /cvs/stx/stx/libbasic/SortedCollection.st,v 1.78 2014-02-12 14:36:52 cg Exp $' |
629 | 1035 |
! ! |
7300 | 1036 |
|
16000 | 1037 |
|
607 | 1038 |
SortedCollection initialize! |