REBOL [ Title: "Associate" Date: 15-Aug-2002 Name: 'Associate Version: 1.2.0 File: %associate.r Author: "Andrew Martin" Purpose: "Provides an associative memory store." eMail: %Al--Bri--xtra--co--nz Web: http://valley.150m.com library: [ level: 'beginner platform: none type: 'module domain: none tested-under: none support: none license: none see-also: none ] ] Associate?: function [ "Returns the Value corresponding to the Key from the Association." Association [series! port! bitset!] Key [any-type!] ] [ Associated ] [ if found? Associated: select/only/skip Association :Key 2 [ first Associated ] ] Associate: function [ "Associates the Value with the Key in the Association." Association [series! port! bitset!] Key [any-type!] Value [any-type!] ] [ Associated ] [ either found? Associated: find/only/skip Association :Key 2 [ either none? :Value [ remove/part Associated 2 ] [ change/only next Associated :Value ] ] [ if not none? :Value [ repend Association [Key Value] ] ] Association ] Associate-Many: function [ "Associates the Value with the Key in the Association, and keeps the previous value." Association [series! port! bitset!] Key [any-type!] Value [any-type!] /Only "Appends a block value as a block." ] [ Associated ] [ if none? :Value [ return Associate Association :Key :Value ] either found? Associated: Associate? Association :Key [ if not block? Associated [ Associated: reduce [Associated] Associate Association :Key Associated ] either Only [ insert/only tail Associated :Value ] [ insert tail Associated :Value ] ] [ associate Association :Key :Value ] Association ] Keys: func [Association [series! port! bitset!]][ extract Association 2 ]