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=={{header|Racket}}== |
=={{header|Racket}}== |
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< |
<lang racket> |
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#lang racket |
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(define animal-interface (interface () say)) |
(define animal-interface (interface () say)) |
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(define tom (new cat%)) |
(define tom (new cat%)) |
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(send tom say) |
(send tom say) |
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</lang> |
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=={{header|REBOL}}== |
=={{header|REBOL}}== |
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