vl-member-if-not

vl-member-if

V Functions

vl-position

 

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vl-member-if-not

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

predicate-function

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 symbol (function name)
• '(LAMBDA (A1 A2) ...)
• (FUNCTION (LAMBDA (A1 A2) ...))

list

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)