From 042a035d9708f98f43b41ac07171ee0570658c8b Mon Sep 17 00:00:00 2001
From: "Kevin M. Rosenberg" <kevin@rosenberg.net>
Date: Thu, 31 Jul 2003 07:36:55 +0000
Subject: [PATCH] r5417: *** empty log message ***

---
 lists.lisp   | 13 ++++++++++---
 package.lisp |  3 ++-
 tests.lisp   |  6 ++++--
 3 files changed, 16 insertions(+), 6 deletions(-)

diff --git a/lists.lisp b/lists.lisp
index 285bb39..77b6fa5 100644
--- a/lists.lisp
+++ b/lists.lisp
@@ -7,7 +7,7 @@
 ;;;; Programmer:    Kevin M. Rosenberg
 ;;;; Date Started:  Apr 2000
 ;;;;
-;;;; $Id: lists.lisp,v 1.8 2003/07/05 02:32:08 kevin Exp $
+;;;; $Id: lists.lisp,v 1.9 2003/07/31 07:32:11 kevin Exp $
 ;;;;
 ;;;; This file, part of KMRCL, is Copyright (c) 2002 by Kevin M. Rosenberg
 ;;;;
@@ -22,13 +22,20 @@
   "Make into list if atom"
   (if (listp obj) obj (list obj)))
 
-(defun filter (fn lst)
-  "Filter a list by function, eliminate elements where fn returns nil"
+(defun map-and-remove-nils (fn lst)
+  "mao a list by function, eliminate elements where fn returns nil"
   (let ((acc nil))
     (dolist (x lst (nreverse acc))
       (let ((val (funcall fn x)))
         (when val (push val acc))))))
 
+(defun filter (fn lst)
+  "Filter a list by function, eliminate elements where fn returns nil"
+  (let ((acc nil))
+    (dolist (x lst (nreverse acc))
+      (when (funcall fn x)
+        (push x acc)))))
+
 (defun appendnew (l1 l2)
   "Append two lists, filtering out elem from second list that are already in first list"
   (dolist (elem l2 l1)
diff --git a/package.lisp b/package.lisp
index 735662a..961bcb7 100644
--- a/package.lisp
+++ b/package.lisp
@@ -7,7 +7,7 @@
 ;;;; Programmer:    Kevin M. Rosenberg
 ;;;; Date Started:  Apr 2000
 ;;;;
-;;;; $Id: package.lisp,v 1.54 2003/07/23 22:07:48 kevin Exp $
+;;;; $Id: package.lisp,v 1.55 2003/07/31 07:32:11 kevin Exp $
 ;;;;
 ;;;; This file, part of KMRCL, is Copyright (c) 2002 by Kevin M. Rosenberg
 ;;;;
@@ -25,6 +25,7 @@
    #:ensure-integer
    #:mklist
    #:filter
+   #:map-and-remove-nils
    #:appendnew
    #:memo-proc
    #:memoize
diff --git a/tests.lisp b/tests.lisp
index c917615..dc5053f 100644
--- a/tests.lisp
+++ b/tests.lisp
@@ -7,7 +7,7 @@
 ;;;; Author:        Kevin M. Rosenberg
 ;;;; Date Started:  Apr 2003
 ;;;;
-;;;; $Id: tests.lisp,v 1.22 2003/07/16 16:01:37 kevin Exp $
+;;;; $Id: tests.lisp,v 1.23 2003/07/31 07:36:55 kevin Exp $
 ;;;;
 ;;;; This file is Copyright (c) 2000-2002 by Kevin M. Rosenberg
 ;;;;
@@ -102,8 +102,10 @@
 (deftest css.4 (concat-separated-strings "|" '("ab" "cd") nil) "ab|cd")
 (deftest css.5 (concat-separated-strings "|" '("ab" "cd") nil '("ef")) "ab|cd|ef")
 
-(deftest f.1 (filter #'(lambda (x) (when (oddp x) (* x x)))
+(deftest f.1 (map-and-remove-nils #'(lambda (x) (when (oddp x) (* x x)))
 		     '(0 1 2 3 4 5 6 7 8 9)) (1 9 25 49 81))
+(deftest f.2 (filter #'(lambda (x) (when (oddp x) (* x x)))
+		     '(0 1 2 3 4 5 6 7 8 9)) (1 3 5 7 9))
 (deftest an.1 (appendnew '(a b c d) '(c c e f)) (a b c d e f))
 
 
-- 
2.34.1