Exercise 4.32 · 习题

Exercise 4.32: Give some examples that

illustrate the difference between the streams of Chapter 3 and the

“lazier” lazy lists described in this section. How can you take advantage of

this extra laziness?

练习 4.32：请给出一些例子，说明第 3 章中的流与本节所描述的"更懒"的惰性表之间的区别。这种额外的惰性能带来什么好处？