You can use void, because by default it's not printed. Another possibility is to use a "bounded" version of display, that use ... when the output is too long.
#lang racket (void (range 1000)) (void (time (range 1000))) (define (displayln/... x) (printf "~.a" x)) (displayln/... (range 1000)) ;--- Output: cpu time: 0 real time: 1 gc time: 0 (0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 8... Gustavo On Thu, Aug 14, 2014 at 10:42 PM, 楠字数补丁也 <[email protected]> wrote: > Version Win 8.1 64bit > > Hello, I use "racket.exe [file name]" to execute .rkt file. But sometimes > when in this situation (just an example easy to explain): > > #lang racket > (range 100000) > > The console will automatically display a list of 100000 elements even if I > don't want to display it. > > Some times I just want to know how much time it will take for a function to > work out a very large list, for example: > > (define f <a procedure to form a very large list>) > (time (f args)) > > Now in this case, Racket will still try to display the list for you, and you > will never see the result you want. So, how to forbid Racket console to > display lists? > > > ____________________ > Racket Users list: > http://lists.racket-lang.org/users > ____________________ Racket Users list: http://lists.racket-lang.org/users
