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Graphics Interchange Format  |  2002-01-30  |  10KB  |  719x539  |  4-bit (4 colors)

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OCR: Object- Oriented Programming Class Boolean Instance Protocol aBoolean |aBoolean n0t aBoolean XOT aBoolean and aBlock aBlock short-circuit" eualuatiot Conditional Execution Return result of evaluating aBlock' ifT rue: aBlock ifFalse aBlock ifFalse aBlock ifTrue aBlock ifTrue: aBlock ifFalse aBlock Otherwise return "nil" HArTT Porter 2001 evaluation HarTy

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