How do you check, in elisp, if a list contains a value? so the following would return t:
(contains 3 '(1 2 3))
but
(contains 5 '(1 2 3))
would return nil.
How do you check, in elisp, if a list contains a value? so the
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How do you check, in elisp, if a list contains a value? so the following would return t:
(contains 3 '(1 2 3))
but
(contains 5 '(1 2 3))
would return nil.
The function you need is
memberFor example:
It will return the tail of list whose car is element. While this is not strictly
t, any non-nil value is equivalent to true for a boolean operation. Also,memberusesequalto test for equality, usememqfor stricter equality (usingeq).