diff options
| -rw-r--r-- | txr.1 | 8 |
1 files changed, 6 insertions, 2 deletions
@@ -17010,9 +17010,13 @@ The .code listp test is weaker, and executes without having to traverse the object. +The value produced by the expression .code "(listp x)" -is equivalent to -.codn "(or (null x) (consp x))" . +is the same as that of +.codn "(or (null x) (consp x))" , +except that +.code x +is evaluated only once. The empty list .code nil is a list, and a cons cell is a list. |