langs/Racket/simple-searches.rkt

27 lines
961 B
Racket

#lang racket
;; (C) Copyright Collin J. Doering 2014
;;
;; This program is free software: you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation, either version 3 of the License, or
;; (at your option) any later version.
;;
;; This program is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;; GNU General Public License for more details.
;;
;; You should have received a copy of the GNU General Public License
;; along with this program. If not, see <http://www.gnu.org/licenses/>.
;; File: simple-searches.rkt
;; Author: Collin J. Doering <collin.doering@rekahsoft.ca>
;; Date: Sep 11, 2014
(define (list-search-naive x ys)
(match ys
['() #f]
[(cons a bs) #:when (equal? x a) #t]
[(cons _ bs) (list-search-naive x bs)]))