21 lines
431 B
Smalltalk
21 lines
431 B
Smalltalk
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OrderedCollection extend [
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push: obj [ ^(self add: obj) ]
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pop [
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(self isEmpty) ifTrue: [
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SystemExceptions.NotFound signalOn: self
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reason: 'queue empty'
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] ifFalse: [
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^(self removeFirst)
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]
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]
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]
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|f|
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f := OrderedCollection new.
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f push: 'example'; push: 'another'; push: 'last'.
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f pop printNl.
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f pop printNl.
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f pop printNl.
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f isEmpty printNl.
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f pop. "queue empty error"
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