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"
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COPYRIGHT (c) 2012 by eXept Software AG
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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:libbasic2' }"
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OrderedSet subclass:#SortedSet
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instanceVariableNames:''
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classVariableNames:''
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poolDictionaries:''
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category:'Collections-Sequenceable'
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!
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!SortedSet class methodsFor:'documentation'!
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copyright
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"
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COPYRIGHT (c) 2012 by eXept Software AG
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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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!
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documentation
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"
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I am a subclass of Set whose elements are ordered in a
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similar fashion to SortedCollection.
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That is, I have both Set behavior (only keeping a single instance of
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an element) but I also remember the sort order.
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I have one additional instance variable:
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order <SortedCollection> Sorted collection of values reflecting the order
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in the set.
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[caveat:]
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a tree may be a better choice,
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as although the set shows O(1) behavior when adding,
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the sortedCollection does not (especially as inserting is expensive).
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A balanced tree would show O(lg n) behavior.
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2789
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[author:]
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Claus Gittinger
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[see also:]
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OrderedCollection
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Dictionary OrderedDictionary
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Set Bag
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"
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!
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examples
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"
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[exBegin]
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|s|
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s := SortedSet new.
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s add:'one'.
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s add:'two'.
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s add:'one'.
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s add:'two'.
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s add:'three'.
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s size.
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s do:[:each | Transcript showCR:each].
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[exEnd]
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[exBegin]
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|s|
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s := SortedSet new.
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s add:'one'.
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s add:'two'.
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s add:'one'.
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s add:'two'.
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s add:'three'.
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s remove:'one'.
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s size.
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s do:[:each | Transcript showCR:each].
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[exEnd]
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[exBegin]
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|s|
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s := SortedSet new.
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s add:'one'.
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s add:'two'.
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s add:'three'.
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s add:'one'.
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s add:'two'.
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s add:'three'.
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s size.
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Transcript showCR:s.
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s removeFirst.
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Transcript showCR:s.
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s removeFirst.
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Transcript showCR:s.
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s removeFirst.
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Transcript showCR:s.
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[exEnd]
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"
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! !
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!SortedSet class methodsFor:'instance creation'!
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sortBlock:aBlock
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"return a new sortedSet, whe the sort order is defined by aBlock.
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This must be a two-argument block which returns true if its arg1 has to come before
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its arg2 in the collection."
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^ self new setSortBlock:aBlock
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"Created: / 06-08-2012 / 12:34:29 / cg"
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! !
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!SortedSet methodsFor:'accessing'!
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sortBlock
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^ order sortBlock
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! !
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!SortedSet methodsFor:'adding & removing'!
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addFirst:anObject
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"blocked; only the sort order determines the order"
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self shouldNotImplement
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"Modified: / 06-08-2012 / 12:37:23 / cg"
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!
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addLast:anObject
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"blocked; only the sort order determines the order"
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self shouldNotImplement
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"Modified: / 06-08-2012 / 12:37:30 / cg"
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! !
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!SortedSet methodsFor:'enumerating'!
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collect:aBlock
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"for each element in the receiver, evaluate the argument, aBlock
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and return a new collection with the results"
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|newCollection|
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newCollection := self speciesForAdding new.
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newCollection setSortBlock:self sortBlock.
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self do:[:element | newCollection add:(aBlock value:element)].
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^ newCollection
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"
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#(1 2 3 4) collect:[:e | e odd]
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(1 to:10) collect:[:e | e even]
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"
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"Modified: / 07-08-2010 / 16:26:40 / cg"
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!
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select:aBlock
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"return a new collection with all elements from the receiver, for which
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the argument aBlock evaluates to true.
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See also: #removeAllFoundIn: and #removeAllSuchThat:"
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|newCollection|
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newCollection := self speciesForAdding new.
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newCollection setSortBlock:self sortBlock.
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self do:[:each |
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(aBlock value:each) ifTrue:[newCollection add:each].
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].
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^ newCollection
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"
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#(1 2 3 4) select:[:e | e odd]
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(1 to:10) select:[:e | e even]
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"
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"Modified: / 07-08-2010 / 16:26:40 / cg"
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! !
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!SortedSet methodsFor:'initialization'!
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initializeOrder
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order := SortedCollection new
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"Created: / 06-08-2012 / 12:33:31 / cg"
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!
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setSortBlock:aBlock
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order sortBlock:aBlock
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"Created: / 06-08-2012 / 12:35:07 / cg"
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! !
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!SortedSet class methodsFor:'documentation'!
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version
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^ '$Header: /cvs/stx/stx/libbasic2/SortedSet.st,v 1.3 2014-11-12 11:31:58 stefan Exp $'
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!
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version_CVS
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^ '$Header: /cvs/stx/stx/libbasic2/SortedSet.st,v 1.3 2014-11-12 11:31:58 stefan Exp $'
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! !
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