Determines if the predicate is nil for one of the list members
(vl-member-if-not predicate-function list)
The vl-member-if-not function passes each element in list to the function specified in predicate-function. If the function returns nil, vl-member-if-not returns the rest of the list in the same manner as the member function.
Arguments
The test function. This can be any function that accepts a single argument and returns T for any user-specified condition. The predicate-function value can take one of the following forms:
A list to be tested.
Return Values
A list, starting with the first element that fails the test and containing all elements following this in the original argument. If none of the elements fails the test condition, vl-member-if-not returns nil.
Examples
(vl-member-if-not 'atom '(1 "Str" (0 . "line") nil t)) ((0 . "line") nil T)