2015年4月1日
【SICP练习】152 练习4.8
摘要： 练习4-8原文Exercise 4.8. “Named let” is a variant of let that has the form (let )The and are just as in ordinary let, except that is bound w... 阅读全文
posted @ 2015-04-01 09:53 nomasp 阅读(137) 评论(0) 推荐(0) 编辑
【SICP练习】151 练习4.7
摘要： 练习4-7原文Exercise 4.7. Let* is similar to let, except that the bindings of the let variables are performed sequentially from left to right, and... 阅读全文
posted @ 2015-04-01 09:09 nomasp 阅读(108) 评论(0) 推荐(0) 编辑
【SICP练习】150 练习4.6
摘要： 练习4-6原文Exercise 4.6. Let expressions are derived expressions, because (let (( ) … ( )) ) is equivalent to ((lambda ( … ) ) ) Implement a... 阅读全文
posted @ 2015-04-01 08:52 nomasp 阅读(98) 评论(0) 推荐(0) 编辑