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"{ Encoding: utf8 }"
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"
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COPYRIGHT (c) 2018 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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4819
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"{ Package: 'stx:libbasic2' }"
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"{ NameSpace: Smalltalk }"
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VirtualArray subclass:#VirtualArrayWithCache
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instanceVariableNames:'lruCache'
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classVariableNames:''
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poolDictionaries:''
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4972
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category:'Collections-Arrayed'
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4819
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!
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!VirtualArrayWithCache class methodsFor:'documentation'!
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5388
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copyright
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"
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COPYRIGHT (c) 2018 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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like a VirtualArray, but caches the results of the last few accesses.
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This might behave better, if it is expensive to compute the elements,
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and they are often accessed repeatedly (as when showing in a listView).
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[author:]
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Claus Gittinger
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[instance variables:]
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[class variables:]
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[see also:]
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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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|factorialLines|
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factorialLines := VirtualArrayWithCache new:10000.
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factorialLines generator:[:index | index factorial printString].
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factorialLines at:1000.
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factorialLines at:1000.
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factorialLines at:10000.
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[exEnd]
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"
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! !
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!VirtualArrayWithCache methodsFor:'collection protocol'!
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at:index
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lruCache isNil ifTrue:[
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lruCache := CacheDictionary new:100.
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].
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^ lruCache at:index ifAbsentPut:[generator value:index]
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"Created: / 01-03-2019 / 20:35:45 / Claus Gittinger"
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! !
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!VirtualArrayWithCache class methodsFor:'documentation'!
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version_CVS
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^ '$Header$'
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! !
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