Collections

Abstract

Like most programming languages, Common Lisp provides standard data types that collect multiple values into a single object. Every language slices up the collection problem a little bit differently, but the basic collection types usually boil down to an integer-indexed array type and a table type that can be used to map more or less arbitrary keys to values. The former are variously called arrays, lists, or tuples; the latter go by the names hash tables, associative arrays, maps, and dictionaries.