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correct n->th

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closes #3238
This commit is contained in:
Robby Findler 2020-06-15 15:01:18 -05:00
parent 798618f6a6
commit e7f2331663
2 changed files with 45 additions and 5 deletions
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37
pkgs/racket-test/tests/racket/contract/helpers.rkt
View File

@ -125,3 +125,40 @@
(check-equal? (f 1 0 3 4) (list 1 0 3 4))
(check-equal? (f 0 2 3 4) (list 0 2 3 4))
(check-equal? (f 0 2 3 4) (list 0 2 3 4))
(check-equal? (n->th 0) "0th")
(check-equal? (n->th 1) "1st")
(check-equal? (n->th 2) "2nd")
(check-equal? (n->th 3) "3rd")
(check-equal? (n->th 4) "4th")
(check-equal? (n->th 5) "5th")
(check-equal? (n->th 10) "10th")
(check-equal? (n->th 11) "11th")
(check-equal? (n->th 12) "12th")
(check-equal? (n->th 13) "13th")
(check-equal? (n->th 14) "14th")
(check-equal? (n->th 15) "15th")
(check-equal? (n->th 20) "20th")
(check-equal? (n->th 21) "21st")
(check-equal? (n->th 22) "22nd")
(check-equal? (n->th 23) "23rd")
(check-equal? (n->th 24) "24th")
(check-equal? (n->th 25) "25th")
(check-equal? (n->th 100) "100th")
(check-equal? (n->th 101) "101st")
(check-equal? (n->th 102) "102nd")
(check-equal? (n->th 103) "103rd")
(check-equal? (n->th 104) "104th")
(check-equal? (n->th 105) "105th")
(check-equal? (n->th 110) "110th")
(check-equal? (n->th 111) "111th")
(check-equal? (n->th 112) "112th")
(check-equal? (n->th 113) "113th")
(check-equal? (n->th 114) "114th")
(check-equal? (n->th 115) "115th")
(check-equal? (n->th 120) "120th")
(check-equal? (n->th 121) "121st")
(check-equal? (n->th 122) "122nd")
(check-equal? (n->th 123) "123rd")
(check-equal? (n->th 124) "124th")
(check-equal? (n->th 125) "125th")

5
racket/collects/racket/contract/private/guts.rkt
View File

@ -961,11 +961,14 @@
(define (n->th n)
(string-append
(number->string n)
(case (remainder n 100)
[(11 12 13) "th"]
[else
(case (modulo n 10)
[(1) "st"]
[(2) "nd"]
[(3) "rd"]
[else "th"])))
[else "th"])])))
(define (nth-element-of/alloc n)
(format "the ~a element of" (n->th n)))