X-Git-Url: https://gitweb.factorcode.org/gitweb.cgi?p=factor.git;a=blobdiff_plain;f=extra%2Fmonads%2Fmonads.factor;h=851e1ff0445cabb5e6eedee898750584ab3b5c4d;hp=485e5431605af1b6ab7c9724c969eed5972cbe1c;hb=HEAD;hpb=7c7bb93c55ce5dc4f6411c83ead3eea1fc726d3a

diff --git a/extra/monads/monads.factor b/extra/monads/monads.factor
index 485e543160..b42d5c6fed 100644
--- a/extra/monads/monads.factor
+++ b/extra/monads/monads.factor
@@ -1,8 +1,6 @@
 ! Copyright (C) 2008 Slava Pestov
-! See http://factorcode.org/license.txt for BSD license.
-USING: arrays kernel sequences sequences.deep splitting
-accessors fry locals combinators namespaces lists lists.lazy
-shuffle ;
+! See https://factorcode.org/license.txt for BSD license.
+USING: accessors arrays kernel lists lists.lazy sequences ;
 IN: monads
 
 ! Functors
@@ -188,7 +186,7 @@ M: writer-monad fail   "Fail" throw ;
 
 : run-writer ( writer -- value log ) [ value>> ] [ log>> ] bi ;
 
-M: writer >>= '[ [ _ run-writer ] dip '[ @ run-writer ] dip append <writer> ] ;
+M: writer >>= '[ [ _ run-writer ] dip '[ @ run-writer ] dip prepend <writer> ] ;
 
 : pass ( writer -- writer' ) run-writer [ first2 ] dip swap call( x -- y ) <writer> ;
 : listen ( writer -- writer' ) run-writer [ 2array ] keep <writer> ;