zl:1 - FTP

and
20
I
(when (and bright-day
glorious-day
(princ HIt is a bright and glorious day."»)
Note: (and) => t , which is the identity for the and operation.
For a table of related items: See the section "Conditional Functions" in
Symbolics Common Lisp: Language Concepts.
and &rest types Type Specifier
The type specifier and allows the definition of data types that are the intersection
of other data types specified by types. As a type specifier, and
can only be used in list form.
Examples:
(typep 89 '(and integer number» => T
(subtypep 'bit-vector '(and vector array» => T and T
(sys:type-arglist 'and) => (&REST TYPES) and T
See the section "Data Types and Type Specifiers" in Symbolics Common
Lisp: Language Concepts.
For a discussion of the function and: See the section "Flow of Control" in
Symbolics Common Lisp: Language Concepts.
zl:ap-l array index Function
This is an obsolete version of zl:aloc that only works for one-dimensional
arrays. There is no reason ever to use it.
zl:ap-2 array indexl index2 Function
This is an obsolete version of zl:aloc that only works for two-dimensional
arrays. There is no reason ever to use it.
zl:ap-Ieader array index Function
Returns a locative pointer to the indexed element of array's leader. array
should be an array with a leader, and index should be an integer. See the
section "Cells and Locatives".
However, the preferred method is to use locf and array-leader as shown in
the following example:
(setq *array*
(make-array '(2 3) :element-type 'character
:leader-list '(t nil»)
(locf (array-leader *array* 1»