Property List stores multiple values per one key.
Common Lisp
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README.markdown

Multival-Plist - Property List stores multiple values per one key.

Usage

(defparameter *plist* '(:foo 1 :bar 2 :foo 3))

(getf *plist* :foo)
;=> 1
(getf-all *plist* :foo)
;=> (1 3)

(remf-all *plist* :foo)
;=> T
(getf-all *plist* :foo :undef)
;=> :UNDEF

Description

Multival-Plist provides utilities to handle Property Lists that may contain multiple values per key.

API Reference

[Function] getf-all (plist key &optional default)

*plist*
;=> (:FOO 1 :BAR 2 :FOO 3)
(getf *plist* :foo)
;=> 1
(getf-all *plist* :foo)
;=> (1 3)

This is a version of getf enabled to manage multiple keys. If the plist has two or more pairs that they have given key as a key, returns the values of each pairs as one list.

[Function] (setf getf-all) (val plist key &optional default)

(setf (getf-all *plist* :foo) '("Hello" "World"))
;; *plist* = '(:foo "Hello" :bar 2 :foo "World")

;; same as (setf (getf-all *plist* :foo) '(3000))
(setf (getf-all *plist* :foo) 3000)
;; *plist* = '(:foo 3000 :bar 2)

Changes the stored value(s) of the given key. This removes or adds pairs as necessary to store the new list.

[Macro] remf-all (plist key)

(remf-all *plist* :foo)

Removes a key and associated values for the given key.

Author

Copyright

Copyright (c) 2012 Eitarow Fukamachi (e.arrows@gmail.com)

License

Licensed under the LLGPL License.