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(vectorp [a]) ⇒ t (vectorp "asdf") ⇒ nil
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(vector 'foo 23 [bar baz] "rats") ⇒ [foo 23 [bar baz] "rats"] (vector) ⇒ []
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(setq a (vconcat '(A B C) '(D E F))) ⇒ [A B C D E F] (eq a (vconcat a)) ⇒ nil
(vconcat) ⇒ [] (vconcat [A B C] "aa" '(foo (6 7))) ⇒ [A B C 97 97 foo (6 7)]
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(setq avector [1 two (quote (three)) "four" [five]]) ⇒ [1 two (quote (three)) "four" [five]] (append avector nil) ⇒ (1 two (quote (three)) "four" [five])