lisp 点滴 关于变量,eq
L3also has a list <(A B C) as its value, but it is a different list than the one shared by L1 and L2
(setq L1 (list 'a 'b 'c))
-> (A B C)
(setq L2 L1)
-> (A B C)
(eq L1 L2)
-> T
(setq L3 (list 'a 'b 'c))
-> (A B C)
(eq L3 L1)
-> NIL
-> (A B C)
(setq L2 L1)
-> (A B C)
(eq L1 L2)
-> T
(setq L3 (list 'a 'b 'c))
-> (A B C)
(eq L3 L1)
-> NIL
