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smalltalk-1.1.1
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ArrayedCollection.st
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1991-09-12
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"======================================================================
|
| ArrayedCollection Method Definitions
|
======================================================================"
"======================================================================
|
| Copyright (C) 1990, 1991 Free Software Foundation, Inc.
| Written by Steve Byrne.
|
| This file is part of GNU Smalltalk.
|
| GNU Smalltalk is free software; you can redistribute it and/or modify it
| under the terms of the GNU General Public License as published by the Free
| Software Foundation; either version 1, or (at your option) any later version.
|
| GNU Smalltalk is distributed in the hope that it will be useful, but WITHOUT
| ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
| FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
| details.
|
| You should have received a copy of the GNU General Public License along with
| GNU Smalltalk; see the file COPYING. If not, write to the Free Software
| Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
|
======================================================================"
"
| Change Log
| ============================================================================
| Author Date Change
| sbyrne 25 Apr 89 created.
|
"
SequenceableCollection variableSubclass: #ArrayedCollection
instanceVariableNames: ''
classVariableNames: ''
poolDictionaries: ''
category: nil.
ArrayedCollection comment:
'My instances are objects that are generally fixed size, and are accessed
by an integer index. The ordering of my instance''s elements is determined
externally; I will not rearrange the order of the elements.' !
!ArrayedCollection class methodsFor: 'instance creation'!
with: element1
| anArrayedCollection |
anArrayedCollection _ self new: 1.
anArrayedCollection at: 1 put: element1.
^anArrayedCollection
!
with: element1 with: element2
| anArrayedCollection |
anArrayedCollection _ self new: 2.
anArrayedCollection at: 1 put: element1.
anArrayedCollection at: 2 put: element2.
^anArrayedCollection
!
with: element1 with: element2 with: element3
| anArrayedCollection |
anArrayedCollection _ self new: 3.
anArrayedCollection at: 1 put: element1.
anArrayedCollection at: 2 put: element2.
anArrayedCollection at: 3 put: element3.
^anArrayedCollection
!
with: element1 with: element2 with: element3 with: element4
| anArrayedCollection |
anArrayedCollection _ self new: 4.
anArrayedCollection at: 1 put: element1.
anArrayedCollection at: 2 put: element2.
anArrayedCollection at: 3 put: element3.
anArrayedCollection at: 4 put: element4.
^anArrayedCollection
!!
!ArrayedCollection methodsFor: 'basic'!
add: value
self shouldNotImplement
!!
!ArrayedCollection methodsFor: 'comparing'!
= anArrayedCollection
"Return true if the receiver and anArrayedCollection represent arrays
with equal contents."
self size = anArrayedCollection size ifFalse: [ ^false ].
1 to: self size do:
[ :i | (self at: i) = (anArrayedCollection at: i)
ifFalse: [ ^false ] ].
^true
!
hash
"Return the hash value of the array"
"### I don't like this hashing algorithm"
| hashValue |
hashValue _ 0.
self do: [ :element | hashValue _ ((hashValue bitShift: 1)
bitXor: element hash)
bitAnd: 16r1FFFFFFF ].
^hashValue
!!
!ArrayedCollection methodsFor: 'printing'!
printOn: aStream
| firstTime |
aStream nextPutAll: self classNameString.
aStream nextPutAll: ' ('.
firstTime _ true.
self do:
[ :element | firstTime ifTrue: [ firstTime _ false ]
ifFalse: [ aStream nextPut: Character space ].
element storeOn: aStream ].
aStream nextPut: $)
!!
!ArrayedCollection methodsFor: 'storing'!
storeOn: aStream
| index |
aStream nextPutAll: '(('; nextPutAll: self classNameString;
nextPutAll: ' basicNew: '.
self basicSize printOn: aStream.
aStream nextPut: $).
index _ 1.
self do:
[ :element | aStream nextPutAll: ' at: '.
index printOn: aStream.
aStream nextPutAll: ' put: '.
element storeOn: aStream.
aStream nextPut: $;.
index _ index + 1 ].
index > 1 ifTrue: [ aStream nextPutAll: ' yourself' ].
aStream nextPut: $)
!!