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Using the version of list-copy which supports dotted tails.
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1 changed files with 6 additions and 2 deletions
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@ -23,8 +23,6 @@
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(define (list . args) args)
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(define (list . args) args)
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(define (list-copy ls) (reverse! (reverse ls)))
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(define (list-tail ls k)
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(define (list-tail ls k)
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(if (eq? k 0)
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(if (eq? k 0)
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ls
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ls
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@ -451,6 +449,12 @@
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(let lp ((n n) (res '()))
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(let lp ((n n) (res '()))
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(if (<= n 0) res (lp (- n 1) (cons default res))))))
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(if (<= n 0) res (lp (- n 1) (cons default res))))))
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(define (list-copy ls)
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(let lp ((ls ls) (res '()))
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(if (pair? ls)
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(lp (cdr ls) (cons (car ls) res))
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(append (reverse res) ls))))
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(define (member obj ls . o)
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(define (member obj ls . o)
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(let ((eq (if (pair? o) (car o) equal?)))
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(let ((eq (if (pair? o) (car o) equal?)))
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(let lp ((ls ls))
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(let lp ((ls ls))
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