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original commit: ba3ada699a925ba2d7ffe61f1638ccc495921827
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@ -34,9 +34,13 @@
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(define quicksort
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(polymorphic
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(lambda (l less-than)
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(unless (list? l)
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(raise-type-error 'quicksort "proper list" l))
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(unless (procedure-arity-includes? less-than 2)
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(raise-type-error 'quicksort "procedure of arity 2" less-than))
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(let* ([v (list->vector l)]
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[count (vector-length v)])
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(let loop ([min 0][max count])
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(let loop ([min 0][max count])
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(if (< min (sub1 max))
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(let ([pval (vector-ref v min)])
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(let pivot-loop ([pivot min]
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