`inexact->exact` is more general than some `float->integer`: > (inexact->exact .75) 3/4
I agree it is generally cumbersome to write `(inexact->exact (round <exp that returns a float but you want an int>))`, but it's sufficiently easy to write a wrapper by yourself. Although I wouldn't be against predefined some function that does something like that, but there are many ways to do things like that, so I guess that's the problem. Laurent On Sat, Mar 15, 2014 at 8:23 PM, Tom Dean <[email protected]> wrote: > I encountered the following error -- imagine a function that returns 3.0 > instead of just 3.0 as shown example below: > > > (split-at-right (range 8) 3.0) > split-at-right: contract violation > expected: exact-nonnegative-integer? > given: 3.0 > context...: > /Applications/Racket/collects/racket/list.rkt:191:0: split-at-right > /Applications/Racket/collects/racket/private/misc.rkt:87:7 > > The obvious fixes didn't work ... > > > (split-at-right (range 8) (round 3.0)) > split-at-right: contract violation > expected: exact-nonnegative-integer? > given: 3.0 > context...: > /Applications/Racket/collects/racket/list.rkt:191:0: split-at-right > /Applications/Racket/collects/racket/private/misc.rkt:87:7 > > > > ... and I couldn't find something like real->integer, but inexact->exact > came to the rescue: > > > (split-at-right (range 8) (inexact->exact 3.0)) > (split-at-right (range 8) (inexact->exact 3.0)) > '(0 1 2 3 4) > '(5 6 7) > > (split-at-right (range 8) 3.0) > split-at-right: contract violation > expected: exact-nonnegative-integer? > given: 3.0 > context...: > /Applications/Racket/collects/racket/list.rkt:191:0: split-at-right > /Applications/Racket/collects/racket/private/misc.rkt:87:7 > > > > Still, it doesn't seem particularly elegant. > > > ____________________ > Racket Users list: > http://lists.racket-lang.org/users > >
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