diff -r cde2ee5adeb0 -r 598ff2d009c1 SequenceableCollection.st
--- a/SequenceableCollection.st	Tue Nov 09 10:31:31 1999 +0100
+++ b/SequenceableCollection.st	Tue Nov 09 10:32:10 1999 +0100
@@ -250,6 +250,25 @@
     "
      #(1 2 3) atRandom  
     "
+!
+
+atWrap:index 
+    "Return the index'th element of me if possible.
+     Wrap the index modulu the receivers size if it is out of bounds."
+
+    ^ self at:((index - 1) \\ (self size)) + 1
+
+    "
+     #(1 2 3) atWrap:1    
+     #(1 2 3) atWrap:2    
+     #(1 2 3) atWrap:3    
+     #(1 2 3) atWrap:4    
+     #(1 2 3) atWrap:5    
+     #(1 2 3) atWrap:6    
+     #(1 2 3) atWrap:7    
+     #(1 2 3) atWrap:0    
+     #(1 2 3) atWrap:-1    
+    "
 ! !
 
 !SequenceableCollection methodsFor:'accessing'!
@@ -4442,6 +4461,6 @@
 !SequenceableCollection class methodsFor:'documentation'!
 
 version
-    ^ '$Header: /cvs/stx/stx/libbasic/SequenceableCollection.st,v 1.120 1999-10-06 16:33:34 cg Exp $'
+    ^ '$Header: /cvs/stx/stx/libbasic/SequenceableCollection.st,v 1.121 1999-11-09 09:32:10 cg Exp $'
 ! !
 SequenceableCollection initialize!