How to check if an element is present in a list, both taken as input from the function call, without using the lambda? I was trying member? but could not get it.
(define (find-string (lst lst str ua)
(cond ((member? ua lst) #t)
(else #f))
Checking if element is present in list in racket
Viewed 21962
2 Answers
The use of member would work it's just that you are adding extra "?" in front of the function none is required
(member 2 (list 1 2 3 4)) [1]
would return true
another way around is writing ones own recursive function
(define (is-in-list list value)
(cond
[(empty? list) false]
[(= (first list) value) true]
[else (is-in-list (rest list) value)]))
Related