fix typo
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@ -21,7 +21,7 @@ The @racket[contract-out] form allows you to write
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introduces the variable @racket[_name-of-a-new-contract], binding it to a new
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contract that hides information about the values it protects.
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As an example, consider this (simple) implementation of a queue datastructure:
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As an example, consider this (simple) implementation of a queue data structure:
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@racketmod[racket
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(define empty '())
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(define (enq top queue) (append queue (list top)))
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