Common Lisp: Difference between revisions

Revision as of 06:24, 23 May 2003

Revision as of 09:57, 26 May 2003

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(setq pi 3.1415) ; sets the variable "pi" equal to 3.1415

; Define a function that squares a number

''(more needed)''

(defun square (x) (* x x))

; Execute the function

(square 3) ; Returns "9"

===Data types===

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====Functions====

In Common Lisp, ''functions'' are a data type. For instance, it is possible to write functions that take other functions as arguments. This makes it possible to make very general operations. An example of this is the ''sort'' function, which can sort many types of data in a variety of ways.

In Common Lisp, ''functions'' are a data type. ''(details needed)''

''Check that these examples are right, please...''

(sort '(5 2 6 3 1 4)) ; Returns (1 2 3 4 5 6)

(sort '(5 2 6 3 1 4) #'>) ; Returns (6 5 4 3 2 1), using the > function as

; the comparison operator

(sort '(#\c #\a #\d #\r)) #'char<)

; Returns (#\a #\c #\d #\r)

====Other types====