(remove "FOO" '(foo bar "FOO" "BAR" "foo" "bar") :test #'equal)
=> (foo bar "BAR" "foo" "bar")
(remove "FOO" '(foo bar "FOO" "BAR" "foo" "bar") :test #'equalp)
=> (foo bar "BAR" "bar")
(remove "FOO" '(foo bar "FOO" "BAR" "foo" "bar") :test #'string-equal)
=> (bar "BAR" "bar")
(remove "FOO" '(foo bar "FOO" "BAR" "foo" "bar") :test #'string=)
=> (BAR "BAR" "foo" "bar")
(remove 1 '(1 1.0 #C(1.0 0.0) 2 2.0 #C(2.0 0.0)) :test-not #'eql)
=> (1)
(remove 1 '(1 1.0 #C(1.0 0.0) 2 2.0 #C(2.0 0.0)) :test-not #'=)
=> (1 1.0 #C(1.0 0.0))
(remove 1 '(1 1.0 #C(1.0 0.0) 2 2.0 #C(2.0 0.0)) :test (complement #'=))
=> (1 1.0 #C(1.0 0.0))
(count 1 '((one 1) (uno 1) (two 2) (dos 2)) :key #'cadr) => 2
(count 2.0 '(1 2 3) :test #'eql :key #'float) => 1
(count "FOO" (list (make-pathname :name "FOO" :type "X")
(make-pathname :name "FOO" :type "Y"))
:key #'pathname-name
:test #'equal)
=> 2
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