Smalltalk current createPackage: 'Kernel-Collections'! Object subclass: #Association instanceVariableNames: 'key value' package: 'Kernel-Collections'! !Association commentStamp! I represent a pair of associated objects, a key and a value. My instances can serve as entries in a dictionary. Instances can be created with the class-side method `#key:value:`! !Association methodsFor: 'accessing'! key ^key ! key: aKey key := aKey ! value ^value ! value: aValue value := aValue ! ! !Association methodsFor: 'comparing'! = anAssociation ^self class = anAssociation class and: [ self key = anAssociation key and: [ self value = anAssociation value]] ! ! !Association methodsFor: 'printing'! printOn: aStream self key printOn: aStream. aStream nextPutAll: ' -> '. self value printOn: aStream ! ! !Association class methodsFor: 'instance creation'! key: aKey value: aValue ^self new key: aKey; value: aValue; yourself ! ! Object subclass: #Collection instanceVariableNames: '' package: 'Kernel-Collections'! !Collection commentStamp! I am the abstract superclass of all classes that represent a group of elements. I provide a set of useful methods to the Collectiohn hierarchy such as enumerating and converting methods.! !Collection methodsFor: 'accessing'! occurrencesOf: anObject "Answer how many of the receiver's elements are equal to anObject." | tally | tally := 0. self do: [:each | anObject = each ifTrue: [tally := tally + 1]]. ^tally ! size self subclassResponsibility ! ! !Collection methodsFor: 'adding/removing'! add: anObject self subclassResponsibility ! addAll: aCollection aCollection do: [:each | self add: each]. ^aCollection ! remove: anObject ^self remove: anObject ifAbsent: [self errorNotFound] ! remove: anObject ifAbsent: aBlock self subclassResponsibility ! ! !Collection methodsFor: 'converting'! asArray ^Array withAll: self ! asJSON ^self asArray collect: [:each | each asJSON] ! asOrderedCollection ^self asArray ! asSet ^Set withAll: self ! ! !Collection methodsFor: 'copying'! , aCollection ^self copy addAll: aCollection; yourself ! copyWith: anObject ^self copy add: anObject; yourself ! copyWithAll: aCollection ^self copy addAll: aCollection; yourself ! copyWithoutAll: aCollection "Answer a copy of the receiver that does not contain any elements equal to those in aCollection." ^ self reject: [:each | aCollection includes: each] ! ! !Collection methodsFor: 'enumerating'! collect: aBlock | stream | stream := self class new writeStream. self do: [ :each | stream nextPut: (aBlock value: each) ]. ^stream contents ! detect: aBlock ^self detect: aBlock ifNone: [self errorNotFound] ! detect: aBlock ifNone: anotherBlock self subclassResponsibility ! do: aBlock self subclassResponsibility ! do: aBlock separatedBy: anotherBlock | actionBeforeElement | actionBeforeElement := [actionBeforeElement := anotherBlock]. self do: [:each | actionBeforeElement value. aBlock value: each] ! inject: anObject into: aBlock | result | result := anObject. self do: [:each | result := aBlock value: result value: each]. ^result ! intersection: aCollection "Answer the set theoretic intersection of two collections." | set outputSet | set := self asSet. outputSet := Set new. aCollection do: [ :each | ((set includes: each) and: [(outputSet includes: each) not]) ifTrue: [ outputSet add: each]]. ^ self class withAll: outputSet asArray ! reject: aBlock ^self select: [:each | (aBlock value: each) = false] ! select: aBlock | stream | stream := self class new writeStream. self do: [:each | (aBlock value: each) ifTrue: [ stream nextPut: each]]. ^stream contents ! ! !Collection methodsFor: 'error handling'! errorNotFound self error: 'Object is not in the collection' ! ! !Collection methodsFor: 'streaming'! putOn: aStream self do: [ :each | each putOn: aStream ] ! ! !Collection methodsFor: 'testing'! ifEmpty: aBlock "Evaluate the given block with the receiver as argument, answering its value if the receiver is empty, otherwise answer the receiver. Note that the fact that this method returns its argument in case the receiver is not empty allows one to write expressions like the following ones: self classifyMethodAs: (myProtocol ifEmpty: ['As yet unclassified'])" ^ self isEmpty ifTrue: [ aBlock value ] ifFalse: [ self ] ! ifNotEmpty: aBlock self notEmpty ifTrue: aBlock. ! includes: anObject | sentinel | sentinel := Object new. ^(self detect: [ :each | each = anObject] ifNone: [ sentinel ]) ~= sentinel ! isEmpty ^self size = 0 ! notEmpty ^self isEmpty not ! ! !Collection class methodsFor: 'instance creation'! new: anInteger ^self new ! with: anObject ^self new add: anObject; yourself ! with: anObject with: anotherObject ^self new add: anObject; add: anotherObject; yourself ! with: firstObject with: secondObject with: thirdObject ^self new add: firstObject; add: secondObject; add: thirdObject; yourself ! withAll: aCollection ^self new addAll: aCollection; yourself ! ! Collection subclass: #IndexableCollection instanceVariableNames: '' package: 'Kernel-Collections'! !IndexableCollection commentStamp! I am a key-value store, that is, it stores values under indexes. As a rule of thumb, if a collection has at: and at:put:, it is an IndexableCollection.! !IndexableCollection methodsFor: 'accessing'! at: anIndex "Lookup the given index in the receiver. If it is present, answer the value stored at anIndex. Otherwise, raise an error." ^self at: anIndex ifAbsent: [ self errorNotFound ] ! at: anIndex ifAbsent: aBlock "Lookup the given index in the receiver. If it is present, answer the value stored at anIndex. Otherwise, answer the value of aBlock." self subclassReponsibility ! at: anIndex ifPresent: aBlock "Lookup the given index in the receiver. If it is present, answer the value of evaluating aBlock with the value stored at anIndex. Otherwise, answer nil." ^self at: anIndex ifPresent: aBlock ifAbsent: [ nil ] ! at: anIndex ifPresent: aBlock ifAbsent: anotherBlock "Lookup the given index in the receiver. If it is present, answer the value of evaluating aBlock with the value stored at anIndex. Otherwise, answer the value of anotherBlock." self subclassReponsibility ! at: anIndex put: anObject "Store anObject under the given index in the receiver." self subclassReponsibility ! indexOf: anObject "Lookup index at which anObject is stored in the receiver. If not present, raise an error." ^self indexOf: anObject ifAbsent: [ self errorNotFound ] ! indexOf: anObject ifAbsent: aBlock "Lookup index at which anObject is stored in the receiver. If not present, return value of executing aBlock." self subclassResponsibility ! ! !IndexableCollection methodsFor: 'enumarating'! with: anotherCollection do: aBlock "Calls aBlock with every value from self and with indetically-indexed value from anotherCollection" self withIndexDo: [ :each :index | aBlock value: each value: (anotherCollection at: index) ] ! withIndexDo: aBlock "Calls aBlock with every value from self and with its index as the second argument" self subclassReponsibility ! ! IndexableCollection subclass: #HashedCollection instanceVariableNames: '' package: 'Kernel-Collections'! !HashedCollection commentStamp! I am a traditional JavaScript object, or a Smalltalk `Dictionary`. Unlike a `Dictionary`, it can only have strings as keys.! !HashedCollection methodsFor: 'accessing'! associations | associations | associations := #(). self associationsDo: [:each | associations add: each]. ^associations ! at: aKey ifAbsent: aBlock ^(self includesKey: aKey) ifTrue: [self basicAt: aKey] ifFalse: aBlock ! at: aKey ifAbsentPut: aBlock ^self at: aKey ifAbsent: [ self at: aKey put: aBlock value] ! at: aKey ifPresent: aBlock ifAbsent: anotherBlock "Lookup the given key in the receiver. If it is present, answer the value of evaluating the oneArgBlock with the value associated with the key, otherwise answer the value of absentBlock." ^(self includesKey: aKey) ifTrue: [ aBlock value: (self at: aKey) ] ifFalse: anotherBlock ! at: aKey put: aValue ^self basicAt: aKey put: aValue ! indexOf: anObject ifAbsent: aBlock ^ self keys detect: [ :each | (self at: each) = anObject ] ifNone: aBlock ! keys < if ('function'===typeof Object.keys) return Object.keys(self); var keys = []; for(var i in self) { if(self.hasOwnProperty(i)) { keys.push(i); } }; return keys; > ! size ^self keys size ! values ^self keys collect: [:each | self at: each] ! ! !HashedCollection methodsFor: 'adding/removing'! add: anAssociation self at: anAssociation key put: anAssociation value ! addAll: aHashedCollection super addAll: aHashedCollection associations. ^aHashedCollection ! remove: aKey ifAbsent: aBlock ^self removeKey: aKey ifAbsent: aBlock ! removeKey: aKey ^self remove: aKey ! removeKey: aKey ifAbsent: aBlock ^(self includesKey: aKey) ifFalse: [aBlock value] ifTrue: [self basicDelete: aKey] ! ! !HashedCollection methodsFor: 'comparing'! = aHashedCollection self class = aHashedCollection class ifFalse: [^false]. self size = aHashedCollection size ifFalse: [^false]. ^self associations = aHashedCollection associations ! ! !HashedCollection methodsFor: 'converting'! asDictionary ^Dictionary fromPairs: self associations ! asJSON | c | c := self class new. self keysAndValuesDo: [:key :value | c at: key put: value asJSON]. ^c ! ! !HashedCollection methodsFor: 'copying'! , aCollection self shouldNotImplement ! deepCopy | copy | copy := self class new. self keysAndValuesDo: [:key :value | copy at: key put: value deepCopy]. ^copy ! shallowCopy | copy | copy := self class new. self keysAndValuesDo: [:key :value | copy at: key put: value]. ^copy ! ! !HashedCollection methodsFor: 'enumerating'! associationsDo: aBlock self keysAndValuesDo: [:key :value | aBlock value: (Association key: key value: value)] ! collect: aBlock | newDict | newDict := self class new. self keysAndValuesDo: [:key :value | newDict at: key put: (aBlock value: value)]. ^newDict ! detect: aBlock ifNone: anotherBlock ^self values detect: aBlock ifNone: anotherBlock ! do: aBlock self valuesDo: aBlock ! includes: anObject ^self values includes: anObject ! keysAndValuesDo: aBlock self keysDo: [:each | aBlock value: each value: (self at: each)] ! keysDo: aBlock self keys do: aBlock ! select: aBlock | newDict | newDict := self class new. self keysAndValuesDo: [:key :value | (aBlock value: value) ifTrue: [newDict at: key put: value]]. ^newDict ! valuesDo: aBlock self keysAndValuesDo: [ :key :value | aBlock value: value ] ! withIndexDo: aBlock self keysAndValuesDo: [ :key :value | aBlock value: value value: key ] ! ! !HashedCollection methodsFor: 'printing'! printOn: aStream super printOn: aStream. aStream nextPutAll: ' ('. self associations do: [:each | each printOn: aStream ] separatedBy: [ aStream nextPutAll: ' , ' ]. aStream nextPutAll: ')' ! ! !HashedCollection methodsFor: 'testing'! includesKey: aKey ! ! !HashedCollection class methodsFor: 'instance creation'! fromPairs: aCollection | dict | dict := self new. aCollection do: [:each | dict add: each]. ^dict ! ! HashedCollection subclass: #Dictionary instanceVariableNames: 'keys values' package: 'Kernel-Collections'! !Dictionary commentStamp! I represent a set of elements that can be viewed from one of two perspectives: a set of associations, or a container of values that are externally named where the name can be any object that responds to `=`. The external name is referred to as the key.! !Dictionary methodsFor: 'accessing'! at: aKey ifAbsent: aBlock < var index = self._positionOfKey_(aKey); return index >>=0 ? self['@values'][index] : aBlock(); > ! at: aKey put: aValue < var index = self._positionOfKey_(aKey); if(index === -1) { var keys = self['@keys']; index = keys.length; keys.push(aKey); } return self['@values'][index] = aValue; > ! indexOf: anObject ifAbsent: aBlock | index | index := values indexOf: anObject ifAbsent: [0]. ^ index = 0 ifTrue: [ aBlock value ] ifFalse: [ keys at: index ] ! keys ^keys copy ! values ^values copy ! ! !Dictionary methodsFor: 'adding/removing'! removeKey: aKey ifAbsent: aBlock < var index = self._positionOfKey_(aKey); if(index === -1) { return aBlock() } else { var keys = self['@keys'], values = self['@values']; var value = values[index], l = keys.length; keys[index] = keys[l-1]; keys.pop(); values[index] = values[l-1]; values.pop(); return value; } > ! ! !Dictionary methodsFor: 'converting'! asHashedCollection ^HashedCollection fromPairs: self associations ! asJSON ^self asHashedCollection asJSON ! ! !Dictionary methodsFor: 'enumerating'! keysAndValuesDo: aBlock ^keys with: values do: aBlock ! keysDo: aBlock ^keys do: aBlock ! valuesDo: aBlock ^values do: aBlock ! ! !Dictionary methodsFor: 'initialization'! initialize super initialize. keys := #(). values := #() ! ! !Dictionary methodsFor: 'private'! positionOfKey: anObject < var keys = self['@keys']; for(var i=0;i ! ! !Dictionary methodsFor: 'testing'! includesKey: aKey < return self._positionOfKey_(aKey) >>= 0; > ! ! IndexableCollection subclass: #SequenceableCollection instanceVariableNames: '' package: 'Kernel-Collections'! !SequenceableCollection commentStamp! I am an IndexableCollection with numeric indexes starting with 1.! !SequenceableCollection methodsFor: 'accessing'! allButFirst ^self copyFrom: 2 to: self size ! allButLast ^self copyFrom: 1 to: self size - 1 ! atRandom ^ self at: self size atRandom ! first ^self at: 1 ! first: n "Answer the first n elements of the receiver. Raise an error if there are not enough elements." ^ self copyFrom: 1 to: n ! fourth ^self at: 4 ! indexOf: anObject ifAbsent: aBlock < for(var i=0;i ! indexOf: anObject startingAt: start "Answer the index of the first occurence of anElement after start within the receiver. If the receiver does not contain anElement, answer 0." ^self indexOf: anObject startingAt: start ifAbsent: [0] ! indexOf: anObject startingAt: start ifAbsent: aBlock < for(var i=start-1;i ! last ^self at: self size ! second ^self at: 2 ! third ^self at: 3 ! ! !SequenceableCollection methodsFor: 'adding'! addLast: anObject self add: anObject ! removeLast self remove: self last ! ! !SequenceableCollection methodsFor: 'comparing'! = aCollection (self class = aCollection class and: [ self size = aCollection size]) ifFalse: [^false]. self withIndexDo: [:each :i | (aCollection at: i) = each ifFalse: [^false]]. ^true ! ! !SequenceableCollection methodsFor: 'converting'! reversed self subclassResponsibility ! ! !SequenceableCollection methodsFor: 'copying'! copyFrom: anIndex to: anotherIndex | range newCollection | range := anIndex to: anotherIndex. newCollection := self class new: range size. range withIndexDo: [:each :i | newCollection at: i put: (self at: each)]. ^newCollection ! deepCopy | newCollection | newCollection := self class new: self size. self withIndexDo: [:each :index | newCollection at: index put: each deepCopy]. ^newCollection ! shallowCopy | newCollection | newCollection := self class new: self size. self withIndexDo: [ :each :index | newCollection at: index put: each]. ^newCollection ! ! !SequenceableCollection methodsFor: 'enumerating'! detect: aBlock ifNone: anotherBlock < for(var i = 0; i < self.length; i++) if(aBlock(self[i])) return self[i]; return anotherBlock(); > ! do: aBlock ! with: anotherCollection do: aBlock ! withIndexDo: aBlock ! ! !SequenceableCollection methodsFor: 'streaming'! newStream ^self streamClass on: self ! readStream "For Pharo compatibility" ^self stream ! stream ^self newStream ! streamClass ^self class streamClass ! writeStream "For Pharo compatibility" ^self stream ! ! !SequenceableCollection methodsFor: 'testing'! includes: anObject ^(self indexOf: anObject ifAbsent: [nil]) notNil ! ! !SequenceableCollection class methodsFor: 'accessing'! streamClass ^Stream ! ! !SequenceableCollection class methodsFor: 'streaming'! streamContents: aBlock | stream | stream := (self streamClass on: self new). aBlock value: stream. ^ stream contents ! ! SequenceableCollection subclass: #Array instanceVariableNames: '' package: 'Kernel-Collections'! !Array commentStamp! I represent a collection of objects ordered by the collector. The size of arrays is dynamic. In Amber, OrderedCollection is an alias for Array.! !Array methodsFor: 'accessing'! at: anIndex ifAbsent: aBlock < if((anIndex < 1) || (self.length < anIndex)) {return aBlock()}; return self[anIndex - 1]; > ! at: anIndex put: anObject ! size ! ! !Array methodsFor: 'adding/removing'! add: anObject ! remove: anObject ifAbsent: aBlock < for(var i=0;i ! removeFrom: aNumber to: anotherNumber ! ! !Array methodsFor: 'converting'! asJavascript ^'[', ((self collect: [:each | each asJavascript]) join: ', '), ']' ! reversed ! ! !Array methodsFor: 'enumerating'! join: aString ! sort ^self basicPerform: 'sort' ! sort: aBlock < return self.sort(function(a, b) { if(aBlock(a,b)) {return -1} else {return 1} }) > ! sorted ^self copy sort ! sorted: aBlock ^self copy sort: aBlock ! ! !Array methodsFor: 'printing'! printOn: aStream super printOn: aStream. aStream nextPutAll: ' ('. self do: [ :each | each printOn: aStream ] separatedBy: [ aStream nextPutAll: ' ' ]. aStream nextPutAll: ')' ! ! !Array class methodsFor: 'instance creation'! new: anInteger ! with: anObject ^(self new: 1) at: 1 put: anObject; yourself ! with: anObject with: anObject2 ^(self new: 2) at: 1 put: anObject; at: 2 put: anObject2; yourself ! with: anObject with: anObject2 with: anObject3 ^(self new: 3) at: 1 put: anObject; at: 2 put: anObject2; at: 3 put: anObject3; yourself ! withAll: aCollection | instance index | index := 1. instance := self new: aCollection size. aCollection do: [:each | instance at: index put: each. index := index + 1]. ^instance ! ! SequenceableCollection subclass: #CharacterArray instanceVariableNames: '' package: 'Kernel-Collections'! !CharacterArray commentStamp! I am the abstract superclass of string-like collections.! !CharacterArray methodsFor: 'accessing'! at: anIndex put: anObject self errorReadOnly ! ! !CharacterArray methodsFor: 'adding'! add: anObject self errorReadOnly ! remove: anObject self errorReadOnly ! ! !CharacterArray methodsFor: 'converting'! asLowercase ^self class fromString: self asString asLowercase ! asNumber ^self asString asNumber ! asString ^self subclassResponsibility ! asSymbol ^self subclassResponsibility ! asUppercase ^self class fromString: self asString asUppercase ! ! !CharacterArray methodsFor: 'copying'! , aString ^self asString, aString asString ! ! !CharacterArray methodsFor: 'error handling'! errorReadOnly self error: 'Object is read-only' ! ! !CharacterArray methodsFor: 'printing'! printOn: aStream self asString printOn: aStream ! ! !CharacterArray methodsFor: 'streaming'! putOn: aStream aStream nextPutAll: self ! ! !CharacterArray class methodsFor: 'instance creation'! fromString: aString self subclassResponsibility ! ! CharacterArray subclass: #String instanceVariableNames: '' package: 'Kernel-Collections'! !String commentStamp! I am an indexed collection of Characters. Unlike most Smalltalk dialects, Amber doesn't provide the Character class. Instead, elements of a String are single character strings. String inherits many useful methods from its hierarchy, such as `Collection >> #,`! !String methodsFor: 'accessing'! asciiValue ! at: anIndex ifAbsent: aBlock ! escaped ! size ! unescaped ! ! !String methodsFor: 'comparing'! < aString ! <= aString ! = aString < if(!! aString._isString || !! aString._isString()) { return false; } return String(self) === String(aString) > ! == aString ^self = aString ! > aString > aString._asString()> ! >= aString >= aString._asString()> ! ! !String methodsFor: 'converting'! asJSON ^self ! asJavaScriptSelector ^(self asSelector replace: '^_' with: '') replace: '_.*' with: ''. ! asJavascript < if(self.search(/^[a-zA-Z0-9_:.$ ]*$/) == -1) return "\"" + self.replace(/[\x00-\x1f"\\\x7f-\x9f]/g, function(ch){var c=ch.charCodeAt(0);return "\\x"+("0"+c.toString(16)).slice(-2)}) + "\""; else return "\"" + self + "\""; > ! asLowercase ! asNumber ! asRegexp ^ RegularExpression fromString: self ! asSelector ! asString ^self ! asSymbol ^Symbol lookup: self ! asUppercase ! reversed ! tokenize: aString ! ! !String methodsFor: 'copying'! , aString ! copyFrom: anIndex to: anotherIndex ! deepCopy ^self shallowCopy ! shallowCopy ^self class fromString: self ! ! !String methodsFor: 'enumerating'! do: aBlock ! withIndexDo: aBlock ! ! !String methodsFor: 'printing'! printNl ! printOn: aStream aStream nextPutAll: ''''; nextPutAll: self; nextPutAll: '''' ! ! !String methodsFor: 'regular expressions'! match: aRegexp ! matchesOf: aRegularExpression ! replace: aString with: anotherString ^self replaceRegexp: (RegularExpression fromString: aString flag: 'g') with: anotherString ! replaceRegexp: aRegexp with: aString ! trimBoth ^self trimBoth: '\s' ! trimBoth: separators ^(self trimLeft: separators) trimRight: separators ! trimLeft ^self trimLeft: '\s' ! trimLeft: separators ^self replaceRegexp: (RegularExpression fromString: '^[', separators, ']+' flag: 'g') with: '' ! trimRight ^self trimRight: '\s' ! trimRight: separators ^self replaceRegexp: (RegularExpression fromString: '[', separators, ']+$' flag: 'g') with: '' ! ! !String methodsFor: 'split join'! join: aCollection ^ String streamContents: [:stream | aCollection do: [:each | stream nextPutAll: each asString] separatedBy: [stream nextPutAll: self]] ! lineIndicesDo: aBlock "execute aBlock with 3 arguments for each line: - start index of line - end index of line without line delimiter - end index of line including line delimiter(s) CR, LF or CRLF" | cr lf start sz nextLF nextCR | start := 1. sz := self size. cr := String cr. nextCR := self indexOf: cr startingAt: 1. lf := String lf. nextLF := self indexOf: lf startingAt: 1. [ start <= sz ] whileTrue: [ (nextLF = 0 and: [ nextCR = 0 ]) ifTrue: [ "No more CR, nor LF, the string is over" aBlock value: start value: sz value: sz. ^self ]. (nextCR = 0 or: [ 0 < nextLF and: [ nextLF < nextCR ] ]) ifTrue: [ "Found a LF" aBlock value: start value: nextLF - 1 value: nextLF. start := 1 + nextLF. nextLF := self indexOf: lf startingAt: start ] ifFalse: [ 1 + nextCR = nextLF ifTrue: [ "Found a CR-LF pair" aBlock value: start value: nextCR - 1 value: nextLF. start := 1 + nextLF. nextCR := self indexOf: cr startingAt: start. nextLF := self indexOf: lf startingAt: start ] ifFalse: [ "Found a CR" aBlock value: start value: nextCR - 1 value: nextCR. start := 1 + nextCR. nextCR := self indexOf: cr startingAt: start ]]] ! lineNumber: anIndex "Answer a string containing the characters in the given line number." | lineCount | lineCount := 0. self lineIndicesDo: [:start :endWithoutDelimiters :end | (lineCount := lineCount + 1) = anIndex ifTrue: [^self copyFrom: start to: endWithoutDelimiters]]. ^nil ! lines "Answer an array of lines composing this receiver without the line ending delimiters." | lines | lines := Array new. self linesDo: [:aLine | lines add: aLine]. ^lines ! linesDo: aBlock "Execute aBlock with each line in this string. The terminating line delimiters CR, LF or CRLF pairs are not included in what is passed to aBlock" self lineIndicesDo: [:start :endWithoutDelimiters :end | aBlock value: (self copyFrom: start to: endWithoutDelimiters)] ! ! !String methodsFor: 'testing'! includesSubString: subString < return self.indexOf(subString) !!= -1 > ! isImmutable ^ true ! isString ^true ! isVowel "Answer true if the receiver is a one character string containing a voyel" ^ self size = 1 and: [ 'aeiou' includes: self asLowercase ] ! ! !String class methodsFor: 'accessing'! cr ! crlf ! lf ! space ! streamClass ^StringStream ! tab ! ! !String class methodsFor: 'instance creation'! fromCharCode: anInteger ! fromString: aString ! value: aUTFCharCode ! ! !String class methodsFor: 'random'! random "Returns random alphanumeric string beginning with letter" ! randomNotIn: aString | result | [ result := self random. aString includesSubString: result ] whileTrue. ^result ! ! CharacterArray subclass: #Symbol instanceVariableNames: '' package: 'Kernel-Collections'! !Symbol commentStamp! I represent Strings that are created uniquely. Symbols are unique through the system. Thus, someString asSymbol == someString asSymbol.! !Symbol methodsFor: 'accessing'! at: anIndex ifAbsent: aBlock ^self asString at: anIndex ifAbsent: aBlock ! indexOf: anElement ^ self asString indexOf: anElement ! size ^self asString size ! ! !Symbol methodsFor: 'comparing'! < aSymbol ^self asString < aSymbol asString ! <= aSymbol ^self asString <= aSymbol asString ! = aSymbol aSymbol class = self class ifFalse: [^false]. ^self asString = aSymbol asString ! > aSymbol ^self asString > aSymbol asString ! >= aSymbol ^self asString >= aSymbol asString ! ! !Symbol methodsFor: 'converting'! asJSON ^self asString asJSON ! asJavascript ^'smalltalk.symbolFor(', self asString asJavascript, ')' ! asSelector ^self asString asSelector ! asString ! asSymbol ^self ! ! !Symbol methodsFor: 'copying'! copyFrom: anIndex to: anotherIndex ^self class fromString: (self asString copyFrom: anIndex to: anotherIndex) ! deepCopy ^self ! shallowCopy ^self ! ! !Symbol methodsFor: 'enumerating'! collect: aBlock ^ (self asString collect: aBlock) asSymbol ! detect: aBlock ^ self asString detect: aBlock ! do: aBlock self asString do: aBlock ! select: aBlock ^ (self asString select: aBlock) asSymbol ! withIndexDo: aBlock self asString withIndexDo: aBlock ! ! !Symbol methodsFor: 'evaluating'! value: anObject ^anObject perform: self ! ! !Symbol methodsFor: 'printing'! printOn: aStream aStream nextPutAll: '#'. super printOn: aStream ! ! !Symbol methodsFor: 'testing'! isSymbol ^true ! ! !Symbol class methodsFor: 'instance creation'! basicNew self shouldNotImplement ! fromString: aString ^self lookup: aString ! lookup: aString ! ! Collection subclass: #Set instanceVariableNames: 'elements' package: 'Kernel-Collections'! !Set commentStamp! I represent an unordered set of objects without duplicates.! !Set methodsFor: 'accessing'! size ^elements size ! ! !Set methodsFor: 'adding/removing'! add: anObject < var found; for(var i=0; i < self['@elements'].length; i++) { if(anObject == self['@elements'][i]) { found = true; break; } } if(!!found) {self['@elements'].push(anObject)} > ! remove: anObject elements remove: anObject ! ! !Set methodsFor: 'comparing'! = aCollection self class = aCollection class ifFalse: [ ^ false ]. self size = aCollection size ifFalse: [ ^ false ]. self do: [:each | (aCollection includes: each) ifFalse: [ ^ false ] ]. ^ true ! ! !Set methodsFor: 'converting'! asArray ^elements copy ! ! !Set methodsFor: 'enumerating'! collect: aBlock ^self class withAll: (elements collect: aBlock) ! detect: aBlock ifNone: anotherBlock ^elements detect: aBlock ifNone: anotherBlock ! do: aBlock elements do: aBlock ! select: aBlock | collection | collection := self class new. self do: [:each | (aBlock value: each) ifTrue: [ collection add: each]]. ^collection ! ! !Set methodsFor: 'initialization'! initialize super initialize. elements := #() ! ! !Set methodsFor: 'printing'! printOn: aStream super printOn: aStream. aStream nextPutAll: ' ('. self do: [ :each | each printOn: aStream ] separatedBy: [ aStream nextPutAll: ' ' ]. aStream nextPutAll: ')' ! ! !Set methodsFor: 'testing'! includes: anObject ^elements includes: anObject ! ! Object subclass: #Queue instanceVariableNames: 'read readIndex write' package: 'Kernel-Collections'! !Queue commentStamp! A Queue am a one-sided queue. A Queue uses two OrderedCollections inside, `read` is at the front, is not modified and only read using `readIndex`. `write` is at the back and is appended new items. When `read` is exhausted, `write` is promoted to `read` and new `write` is created. As a consequence, no data moving is done by the Queue; write appending may do data moving when growing `write`, but this is left to engine to implement as good as it chooses to.! !Queue methodsFor: 'accessing'! back: anObject write add: anObject ! front ^self frontIfAbsent: [ self error: 'Cannot read from empty Queue.' ] ! frontIfAbsent: aBlock | result | result := read at: readIndex ifAbsent: [ write isEmpty ifTrue: [ readIndex > 1 ifTrue: [ read := #(). readIndex := 1 ]. ^aBlock value ]. read := write. readIndex := 1. write := OrderedCollection new. read first ]. read at: readIndex put: nil. readIndex := readIndex + 1. ^result ! ! !Queue methodsFor: 'initialization'! initialize super initialize. read := OrderedCollection new. write := OrderedCollection new. readIndex := 1 ! ! Object subclass: #RegularExpression instanceVariableNames: '' package: 'Kernel-Collections'! !RegularExpression commentStamp! I represent a regular expression object. My instances are JavaScript `RegExp` object.! !RegularExpression methodsFor: 'evaluating'! compile: aString ! exec: aString ! test: aString ! ! !RegularExpression class methodsFor: 'instance creation'! fromString: aString ^self fromString: aString flag: '' ! fromString: aString flag: anotherString ! ! Object subclass: #Stream instanceVariableNames: 'collection position streamSize' package: 'Kernel-Collections'! !Stream commentStamp! I represent an accessor for a sequence of objects. This sequence is referred to as my "contents". My instances are read/write streams to the contents sequence collection.! !Stream methodsFor: 'accessing'! collection ^collection ! contents ^self collection copyFrom: 1 to: self streamSize ! position ^position ifNil: [position := 0] ! position: anInteger position := anInteger ! setCollection: aCollection collection := aCollection ! setStreamSize: anInteger streamSize := anInteger ! size ^self streamSize ! streamSize ^streamSize ! ! !Stream methodsFor: 'actions'! close ! flush ! reset self position: 0 ! resetContents self reset. self setStreamSize: 0 ! ! !Stream methodsFor: 'enumerating'! do: aBlock [self atEnd] whileFalse: [aBlock value: self next] ! ! !Stream methodsFor: 'positioning'! setToEnd self position: self size ! skip: anInteger self position: ((self position + anInteger) min: self size max: 0) ! ! !Stream methodsFor: 'reading'! next ^self atEnd ifTrue: [nil] ifFalse: [ self position: self position + 1. collection at: self position] ! next: anInteger | tempCollection | tempCollection := self collection class new. anInteger timesRepeat: [ self atEnd ifFalse: [ tempCollection add: self next]]. ^tempCollection ! peek ^self atEnd ifFalse: [ self collection at: self position + 1] ! ! !Stream methodsFor: 'testing'! atEnd ^self position = self size ! atStart ^self position = 0 ! isEmpty ^self size = 0 ! ! !Stream methodsFor: 'writing'! << anObject self write: anObject ! nextPut: anObject self position: self position + 1. self collection at: self position put: anObject. self setStreamSize: (self streamSize max: self position) ! nextPutAll: aCollection aCollection do: [:each | self nextPut: each] ! write: anObject anObject putOn: self ! ! !Stream class methodsFor: 'instance creation'! on: aCollection ^self new setCollection: aCollection; setStreamSize: aCollection size; yourself ! ! Stream subclass: #StringStream instanceVariableNames: '' package: 'Kernel-Collections'! !StringStream commentStamp! I am a Stream specific to `String` objects.! !StringStream methodsFor: 'reading'! next: anInteger | tempCollection | tempCollection := self collection class new. anInteger timesRepeat: [ self atEnd ifFalse: [ tempCollection := tempCollection, self next]]. ^tempCollection ! ! !StringStream methodsFor: 'writing'! cr ^self nextPutAll: String cr ! crlf ^self nextPutAll: String crlf ! lf ^self nextPutAll: String lf ! nextPut: aString self nextPutAll: aString ! nextPutAll: aString | pre post | self atEnd ifTrue: [ self setCollection: self collection, aString ] ifFalse: [ pre := self collection copyFrom: 1 to: self position. post := self collection copyFrom: (self position + 1 + aString size) to: self collection size. self setCollection: pre, aString, post ]. self position: self position + aString size. self setStreamSize: (self streamSize max: self position) ! space self nextPut: ' ' ! tab ^self nextPutAll: String tab ! !