suzanne.soy/scribble-math
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Range now returns a List (and not a list)

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This commit is contained in:
Jens Axel Søgaard 2012-07-03 14:01:19 +02:00
parent bfcd26228a
commit 68ec2ff4c2
1 changed files with 10 additions and 3 deletions
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13
bracket/bracket.rkt
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@ -1141,20 +1141,23 @@
(List)))
(define Range
; 0-based when only given imax
(case-lambda
[()
(list 'Range)]
[(imax)
(if (number? imax) (range imax) `(Range ,imax))]
(if (number? imax)
(list->List (range imax))
`(Range ,imax))]
[(imin imax)
(if (and (number? imin) (number? imax))
(range imin imax)
(list->List (range imin imax))
`(Range ,imin ,imax))]
[(imin imax di)
(if (and (number? imin)
(number? imax)
(number? di))
(range imin imax di)
(list->List (range imin imax di))
`(Range ,imin ,imax ,di))]
[args `(Range . ,args)]))
@ -1357,6 +1360,10 @@
; Solve-linear
(check-equal? (Solve-linear 2 3) '(List -3/2))
(check-equal? (Solve-linear a b) (List (Minus (Quotient b a))))
; Range (as range in Racket)
(check-equal? (Range 5) (List 0 1 2 3 4))
(check-equal? (Range 2 5) (List 2 3 4))
(check-equal? (Range 2 10 3) (List 2 5 8))
)