From cbb48495bd8cd6cdcbebd1bcd8c3051148c8b0a6 Mon Sep 17 00:00:00 2001 From: Jim Pryor Date: Thu, 30 Sep 2010 14:31:25 -0400 Subject: [PATCH 1/1] tweaked arithmetic Signed-off-by: Jim Pryor --- arithmetic.mdwn | 1 + 1 file changed, 1 insertion(+) diff --git a/arithmetic.mdwn b/arithmetic.mdwn index d2724875..bc15ae8d 100644 --- a/arithmetic.mdwn +++ b/arithmetic.mdwn @@ -44,6 +44,7 @@ Here are a bunch of pre-tested operations for the untyped lambda calculus. In so let map = \f lst. lst (\h sofar. make_list (f h) sofar) empty in let filter = \f lst. lst (\h sofar. f h (make_list h sofar) sofar) empty in ; or let filter = \f lst. lst (\h. f h (make_list h) I) empty in + let reverse = \lst. lst (\h t. t make_list (\f n. f h n)) empty in ; version 1 lists -- 2.11.0