assq

(assq obj alst)

Description:

Finds the pair who's car is eq? to obj.

Arguments:

           alst -- the associative list to search

            obj -- a scheme object to search for

Returns: the pair who's car is eq? to obj or #f

Related: assoc assv acons 

Examples:

(assq 4 '((4 . "four") (5 . "five"))) => #f

(define a 4)

(assq a `((,a . "four") (5 . "five"))) => (4 . "four")

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