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-rw-r--r--common-lisp.html.markdown7
1 files changed, 4 insertions, 3 deletions
diff --git a/common-lisp.html.markdown b/common-lisp.html.markdown
index 28b5173b..b12e50ca 100644
--- a/common-lisp.html.markdown
+++ b/common-lisp.html.markdown
@@ -181,8 +181,8 @@ nil ; false; also, the empty list: ()
;;; You can also use unicode characters.
(defparameter *AΛB* nil)
-;;; Accessing a previously unbound variable is an undefined behavior, but
-;;; possible. Don't do it.
+;;; Accessing a previously unbound variable results in an UNBOUND-VARIABLE
+;;; error, however it is defined behavior. Don't do it.
;;; You can create local bindings with LET. In the following snippet, `me` is
;;; bound to "dance with you" only within the (let ...). LET always returns
@@ -284,7 +284,8 @@ nil ; false; also, the empty list: ()
;;; To access the element at 1, 1, 1:
(aref (make-array (list 2 2 2)) 1 1 1) ; => 0
-
+;;; This value is implementation-defined:
+;;; NIL on ECL, 0 on SBCL and CCL.
;;; Adjustable vectors