From 9c4758a456c0d798378188efd07cc2c5707cf520 Mon Sep 17 00:00:00 2001 From: Matthias Felleisen Date: Thu, 21 Oct 2010 22:10:23 -0400 Subject: [PATCH] specified rate-expr --- collects/teachpack/2htdp/scribblings/universe.scrbl | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/collects/teachpack/2htdp/scribblings/universe.scrbl b/collects/teachpack/2htdp/scribblings/universe.scrbl index aaa03c0cc5..566ab4139d 100644 --- a/collects/teachpack/2htdp/scribblings/universe.scrbl +++ b/collects/teachpack/2htdp/scribblings/universe.scrbl @@ -208,7 +208,7 @@ current world. The clock ticks at the rate of 28 times per second.}} [rate-expr (and/c real? positive?)])]{ tells DrRacket to call the @scheme[tick-expr] function on the current world every time the clock ticks. The result of the call becomes the -current world. The clock ticks at the rate of @scheme[rate-expr].}} +current world. The clock ticks every @scheme[rate-expr] seconds.}} @item{A @tech{KeyEvent} represents key board events. @@ -1011,8 +1011,8 @@ optional handlers: #:contracts ([tick-expr (-> (unsyntax @tech{UniverseState}) bundle?)] [rate-expr (and/c real? positive?)])]{ - tells DrRacket to apply @scheme[tick-expr] as above but use the specified - clock tick rate instead of the default.} + tells DrRacket to apply @scheme[tick-expr] as above; the clock ticks + every @scheme[rate-expr] seconds.} } @item{