Ok, Go ahead. 1 (a) (b) (c) (d) 2 注:union 在 Common Lisp 中的作用就是求两个集合的并集.但是这有一个前提,即给的两个列表已经满足集合的属性了.具体的操作过程似乎是对第一个 list 中的每一个元素在第二个 list 中查找,如无则标记一下:待第一个 list 的所有元素在第二个 list 中查完以后将所有标记过的元素放入一个 list 中与第二个 list 进行合并.这意味着,如果刚开始给的两个 list 不完全满足集合的属性,则会有重复出现…
Difference between LET and LET* in Common LISP LET Parallel binding which means the bindings come to life at the same time and they do not shadow each other. The values are effective inside LET and they are undefined outside LET. Just like local…
Scheme and Common Lisp use different names for some of the basic system functions. Many Lisp programs can be translated to the other dialect simply by changing these names (or by providing the existing names as macros or functions). Compatibility pac…
