| | | pushnew-elements | |
|
| list place
&key key test test-not | [Macro] |
Purpose
Pushes new elements in list onto the list stored in
place.
Package :gbbopen-tools
Module :gbbopen-tools
Arguments and values
| list | A proper list | |
| place | A form which is suitable for use as a generalized reference | |
| key | A function designator specifying a function object
of one argument, or nil (default is nil)
| |
| test | A function designator specifying a function object
of two arguments that returns a generalized boolean (default is
#'eql | |
| test-not | A function designator specifying a
function object of two arguments that returns a
generalized boolean (use of :test-not | |
| new-place-value | An association list |
Returns
The new value of place.
Description
Each element in list is checked to see if it is
already present in the proper list stored in place. If
the element is not already present, it is prepended to the list stored
in place.
Examples
> (setf x '(1 3 5)) (1 3 5) > (pushnew-elements '(1 2 3) x) (2 1 3 5) > (pushnew-elements '(3 4 5) x) (4 2 1 3 5) >
The GBBopen Project
| | | pushnew-elements | |