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"{ Encoding: utf8 }"
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"
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COPYRIGHT (c) 1998 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:libbasic' }"
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"{ NameSpace: Smalltalk }"
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Collection subclass:#KeyedCollection
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instanceVariableNames:''
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classVariableNames:''
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poolDictionaries:''
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category:'Collections-Abstract'
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!
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!KeyedCollection class methodsFor:'documentation'!
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copyright
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"
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COPYRIGHT (c) 1998 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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Abstract superclass for collections which have a key->value mapping.
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This abstract class provides functionality common to those collections,
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without knowing how the concrete class implements things.
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Thus, all methods found here depend on some basic mechanisms
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to be defined in the concrete class.
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These basic methods are usually defined as #subclassResponsibility here.
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Some methods are also redefined for better performance.
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Subclasses should at least implement:
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at:ifAbsent: - accessing elements
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removeKey:ifAbsent - removing
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keysAndValuesDo: - enumerating
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[author:]
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Claus Gittinger
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"
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! !
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!KeyedCollection class methodsFor:'instance creation'!
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withAll:aDictionary
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"create a MethodDictionary from another Dictionary"
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|newDict|
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newDict := self new:aDictionary size.
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aDictionary keysAndValuesDo:[:key :value |
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newDict at:key put:value.
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].
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^ newDict
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"
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|d|
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d := Dictionary withKeys:#(a b c d e) andValues:#(1 2 3 4 5).
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KeyValueList withAll:d.
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"
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"Created: / 17-03-2017 / 11:29:09 / stefan"
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!
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withAssociations:aCollectionOfAssociations
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"return a new instance where associations are taken from the argument"
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|newDict|
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newDict := self new:aCollectionOfAssociations size.
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aCollectionOfAssociations do:[:assoc |
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newDict at:assoc key put:assoc value
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].
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^ newDict
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"
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KeyValueList withAssociations:{ #'one'->1 .
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#'two'->2 .
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#'three'->3 .
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#'four'->4 }
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"
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"Created: / 16-03-2017 / 12:15:38 / stefan"
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"Modified: / 17-03-2017 / 11:30:55 / stefan"
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!
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withKeys:keyArray andValues:valueArray
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"return a new instance where keys and values are taken from
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the argumentArrays."
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|newColl sz "{ Class: SmallInteger }"|
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sz := keyArray size.
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newColl := self new:sz.
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1 to:sz do:[:index |
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newColl at:(keyArray at:index) put:(valueArray at:index).
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].
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^ newColl
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"Created: / 16-03-2017 / 11:06:51 / stefan"
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"Modified (format): / 16-03-2017 / 12:12:09 / stefan"
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!
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withKeysAndValues:anArray
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"return a new instance where keys and values are taken from alternating
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elements of anArray"
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|newDict sz "{ Class: SmallInteger }"|
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sz := anArray size.
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newDict := self new:sz.
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1 to:sz by:2 do:[:i |
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newDict at:(anArray at:i) put:(anArray at:i+1)
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].
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^ newDict
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"
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KeyValueList withKeysAndValues:#('one' 1 'two' 2 'three' 3 'four' 4)
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"
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"Created: / 16-03-2017 / 12:13:27 / stefan"
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"Modified: / 17-03-2017 / 11:32:42 / stefan"
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! !
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!KeyedCollection class methodsFor:'queries'!
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isAbstract
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"Return if this class is an abstract class.
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True is returned for KeyedCollection here; false for subclasses.
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Abstract subclasses must redefine this again."
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^ self == KeyedCollection
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! !
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!KeyedCollection methodsFor:'accessing'!
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associationAt:aKey
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"return an association consisting of aKey and the element indexed
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by aKey -
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report an error, if no element is stored under aKey."
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^ self associationAt:aKey ifAbsent:[self errorKeyNotFound:aKey]
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"Modified: / 16-03-2017 / 17:19:52 / stefan"
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!
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associationAt:aKey ifAbsent:exceptionBlock
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"return an association consisting of aKey and the element indexed by aKey -
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return result of exceptionBlock if no element is stored under aKey.
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Warning: this is a comatibility interface only, with a different semantic as
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the original ST80 implementation. The returned assoc is created on the fly,
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and not the one stored in the receiver (there are not assocs there)"
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|value|
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value := self at:aKey ifAbsent:[^ exceptionBlock value].
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^ Association key:aKey value:value.
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"Created: / 16-03-2017 / 17:17:05 / stefan"
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!
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associations
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"return an ordered collection containing the receiver's associations."
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|coll|
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coll := OrderedCollection new.
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self associationsDo:[:assoc | coll add:assoc].
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^ coll
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"Created: / 16-03-2017 / 17:30:47 / stefan"
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!
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at:key
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"return the value stored under akey.
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Raise an error if not found"
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^ self at:key ifAbsent:[self errorKeyNotFound:key].
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"Modified: / 19.6.1998 / 00:48:27 / cg"
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!
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at:key ifAbsent:exceptionBlock
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"return the value stored under akey.
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Return the value from evaluating exceptionBlock if not found"
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^ self subclassResponsibility
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"Created: / 19.6.1998 / 00:48:23 / cg"
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!
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at:aKey ifAbsent:default update:aBlock
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"update the element stored under aKey with the result from
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evaluating aBlock with the previous stored value as argument, or with default,
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if there was no such key initially.
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Return the new value stored."
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^ self at:aKey put:(aBlock value:(self at:aKey ifAbsent:default))
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"Created: / 16-03-2017 / 17:28:15 / stefan"
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!
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at:aKey ifAbsentPut:valueBlock
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"return the element indexed by aKey if present,
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if not present, store the result of evaluating valueBlock
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under aKey and return it.
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WARNING: do not add elements while iterating over the receiver.
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Iterate over a copy to do this."
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^ self at:aKey ifAbsent:[self at:aKey put:valueBlock value].
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"Created: / 16-03-2017 / 17:23:07 / stefan"
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!
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at:aKey ifPresent:aBlock
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"try to retrieve the value stored at aKey.
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If there is nothing stored under this key, do nothing.
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Otherwise, evaluate aBlock, passing the retrieved value as argument."
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|v|
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v := self at:aKey ifAbsent:[^ nil].
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^ aBlock value:v.
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"Created: / 16-03-2017 / 17:11:27 / stefan"
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!
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at:aKey put:anObject
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"add the argument anObject under key, aKey to the receiver.
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Return anObject (sigh).
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WARNING: do not add elements while iterating over the receiver.
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Iterate over a copy to do this."
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^ self subclassResponsibility
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"Created: / 16-03-2017 / 17:33:12 / stefan"
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!
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at:aKey put:anObject ifPresent:aBlock
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"if the receiver contains an element stored under aKey,
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retrieve it and evaluate aBlock passing the element as argument,
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return the blocks value.
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If not, store aValue under the key.
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Use this with an error-reporting block, to ensure that no keys are reused"
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|value isAbsent|
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value := self at:aKey ifAbsentPut:[isAbsent := true. anObject].
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isAbsent notNil ifTrue:[
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^ value.
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].
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^ aBlock value:value.
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"Created: / 16-03-2017 / 17:38:00 / stefan"
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"Modified: / 17-03-2017 / 11:37:26 / stefan"
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!
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at:aKey update:aBlock
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"update the element stored under aKey with the result from
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evaluating aBlock with the previous stored value as argument.
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Report an error if there was no such key initially.
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Return the new value stored."
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^ self at:aKey put:(aBlock value:(self at:aKey))
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"Created: / 16-03-2017 / 17:29:22 / stefan"
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!
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keyAtEqualValue:value
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"return the key under which value is stored.
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Raise an error if not found.
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This is a slow access, since the receiver is searched sequentially.
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NOTICE:
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The value is searched using equality compare"
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^ self keyAtEqualValue:value ifAbsent:[self errorValueNotFound:value].
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"Created: / 07-02-2017 / 11:11:41 / cg"
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!
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keyAtEqualValue:value ifAbsent:exceptionBlock
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"return the key under which value is stored.
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If not found, return the value from evaluating exceptionBlock.
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This is a slow access, since the receiver is searched sequentially.
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NOTICE:
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The value is searched using equality compare"
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self keysAndValuesDo:[:elKey :elValue |
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value = elValue ifTrue:[^ elKey]
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].
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^ exceptionBlock value
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"Created: / 07-02-2017 / 11:12:03 / cg"
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!
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keyAtIdenticalValue:value
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"return the key under which value is stored.
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Raise an error if not found.
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This is a slow access, since the receiver is searched sequentially.
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NOTICE:
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The value is searched using identity compare"
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^ self keyAtIdenticalValue:value ifAbsent:[self errorValueNotFound:value].
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"Created: / 07-02-2017 / 11:12:23 / cg"
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!
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keyAtIdenticalValue:value ifAbsent:exceptionBlock
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"return the key under which value is stored.
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If not found, return the value from evaluating exceptionBlock.
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This is a slow access, since the receiver is searched sequentially.
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NOTICE:
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The value is searched using identity compare"
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self keysAndValuesDo:[:elKey :elValue |
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value == elValue ifTrue:[^ elKey]
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].
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^ exceptionBlock value
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"Created: / 07-02-2017 / 11:12:46 / cg"
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!
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keyAtValue:value
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"return the key under which value is stored.
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Raise an error if not found.
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This is a slow access, since the receiver is searched sequentially.
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NOTICE:
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The value is searched using equality compare"
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^ self keyAtEqualValue:value.
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"Created: / 19-06-1998 / 00:49:16 / cg"
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"Modified (comment): / 07-02-2017 / 11:13:29 / cg"
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"Modified (comment): / 16-03-2017 / 18:00:28 / stefan"
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!
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keyAtValue:value ifAbsent:exceptionBlock
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"return the key under which value is stored.
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If not found, return the value from evaluating exceptionBlock.
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This is a slow access, since the receiver is searched sequentially.
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NOTICE:
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The value is searched using equality compare"
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^ self keyAtEqualValue:value ifAbsent:exceptionBlock.
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"Created: / 19-06-1998 / 00:50:34 / cg"
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"Modified: / 07-02-2017 / 11:13:20 / cg"
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"Modified (comment): / 16-03-2017 / 18:00:37 / stefan"
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!
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keys
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"return a collection containing the keys of the receiver"
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|keyCollection|
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keyCollection := OrderedCollection new.
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self keysDo:[:aKey |
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keyCollection add:aKey
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].
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^ keyCollection
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"Modified: / 19.6.1998 / 00:48:27 / cg"
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"Created: / 19.6.1998 / 00:51:49 / cg"
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! !
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!KeyedCollection methodsFor:'enumerating'!
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associationsDo:aBlock
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"perform the block for all associations in the collection.
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See also:
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#do: (which passes values to its block)
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#keysDo: (which passes only keys to its block)
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#keysAndValuesDo: (which passes keys&values)
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This is much like #keysAndValuesDo:, but aBlock gets the
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key and value as a single association argument.
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#keysAndValuesDo: and is a bit faster therefore (no intermediate objects).
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WARNING: do not add/remove elements while iterating over the receiver.
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Iterate over a copy to do this."
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self keysAndValuesDo:[:eachKey :eachValue|
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aBlock value:(Association key:eachKey value:eachValue).
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].
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"Created: / 17-03-2017 / 11:05:29 / stefan"
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!
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do:aBlock
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"evaluate aBlock for each value"
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self keysAndValuesDo:[:elKey :elValue | aBlock value:elValue]
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"Created: / 19.6.1998 / 00:56:24 / cg"
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!
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keysAndValuesDo:aBlock
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"evaluate aBlock for each key and value"
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^ self subclassResponsibility
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"Created: / 19.6.1998 / 00:56:52 / cg"
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! !
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!KeyedCollection methodsFor:'removing'!
|
|
431 |
|
21732
|
432 |
removeAllKeys:aCollection
|
|
433 |
"remove all keys of the argument, aCollection from the receiver.
|
|
434 |
Raises an error, if some element-to-remove is not in the receiver."
|
|
435 |
|
|
436 |
aCollection do:[:element | self removeKey:element].
|
|
437 |
|
|
438 |
"Modified (comment): / 28-04-2017 / 13:36:15 / stefan"
|
|
439 |
!
|
|
440 |
|
3615
|
441 |
removeKey:aKey
|
|
442 |
"remove key (and the value stored under that key) from the
|
|
443 |
receiver; raise an error if no such element is contained"
|
|
444 |
|
|
445 |
^ self removeKey:aKey ifAbsent:[self errorKeyNotFound:aKey]
|
|
446 |
|
|
447 |
"Created: / 19.6.1998 / 00:53:25 / cg"
|
|
448 |
"Modified: / 19.6.1998 / 00:54:02 / cg"
|
|
449 |
!
|
|
450 |
|
|
451 |
removeKey:aKey ifAbsent:exceptionBlock
|
|
452 |
"remove key (and the value stored under that key) from the
|
19844
|
453 |
receiver; return the value which was stored previously there.
|
|
454 |
If no such element is contained, return the value
|
3615
|
455 |
from evaluating exceptionBlock"
|
|
456 |
|
|
457 |
^ self subclassResponsibility
|
|
458 |
|
|
459 |
"Created: / 19.6.1998 / 00:53:58 / cg"
|
|
460 |
! !
|
|
461 |
|
21653
|
462 |
!KeyedCollection methodsFor:'searching'!
|
|
463 |
|
|
464 |
findFirst:aBlock ifNone:exceptionValue
|
|
465 |
"find the index of the first element, for which evaluation of the argument, aBlock returns true;
|
|
466 |
return its index or the value from exceptionValue if none detected.
|
|
467 |
This is much like #detect:ifNone:, however, here an INDEX is returned,
|
|
468 |
while #detect:ifNone: returns the element.
|
|
469 |
|
|
470 |
Here we return the first key for which aBlock matches the value.
|
|
471 |
Note that there is no order in a Dictionary, so any element is first."
|
|
472 |
|
|
473 |
self keysAndValuesDo:[:eachKey :eachValue| (aBlock value:eachValue) ifTrue:[^ eachKey]].
|
|
474 |
^ exceptionValue value.
|
|
475 |
|
|
476 |
"
|
|
477 |
(KeyValueList withKeys:#('a' 'b' 'c') andValues:#('bla' 'hello' 'hallo'))
|
|
478 |
findFirst:[:v| v first = $h].
|
|
479 |
"
|
|
480 |
|
|
481 |
"Created: / 16-03-2017 / 17:46:02 / stefan"
|
|
482 |
!
|
|
483 |
|
|
484 |
findFirstKey:aBlock
|
|
485 |
"find and return the first key, for which evaluation of the argument, aBlock
|
|
486 |
returns true; return nil if none is detected."
|
|
487 |
|
|
488 |
self keysDo:[:key |
|
|
489 |
(aBlock value:key) ifTrue:[^ key].
|
|
490 |
].
|
|
491 |
^ nil
|
|
492 |
|
|
493 |
"Created: 8.10.1996 / 22:01:31 / cg"
|
|
494 |
"Modified: 8.10.1996 / 22:02:03 / cg"
|
|
495 |
! !
|
|
496 |
|
3615
|
497 |
!KeyedCollection methodsFor:'testing'!
|
|
498 |
|
10533
|
499 |
includesIdenticalKey:aKey
|
|
500 |
"return true, if the argument, aKey is a key in the receiver"
|
|
501 |
|
|
502 |
self keysDo:[:elKey | aKey == elKey ifTrue:[^ true]].
|
|
503 |
^ false
|
|
504 |
|
|
505 |
"Created: / 19.6.1998 / 00:55:05 / cg"
|
|
506 |
!
|
|
507 |
|
3615
|
508 |
includesKey:aKey
|
|
509 |
"return true, if the argument, aKey is a key in the receiver"
|
|
510 |
|
|
511 |
self keysDo:[:elKey | aKey = elKey ifTrue:[^ true]].
|
|
512 |
^ false
|
|
513 |
|
|
514 |
"Created: / 19.6.1998 / 00:55:05 / cg"
|
|
515 |
! !
|
|
516 |
|
|
517 |
!KeyedCollection class methodsFor:'documentation'!
|
|
518 |
|
|
519 |
version
|
19469
|
520 |
^ '$Header$'
|
12667
|
521 |
!
|
|
522 |
|
|
523 |
version_CVS
|
19469
|
524 |
^ '$Header$'
|
3615
|
525 |
! !
|
17120
|
526 |
|