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【SICP练习】148 练习4.4

练习4-4 原文 Exercise 4.4. Recall the definitions of the special forms and and or from chapter 1: ● and: The expressions are evaluated from left to right. If any expression eva...

【SICP练习】145 练习4.1

练习4-1 原文 Exercise 4.1. Notice that we cannot tell whether the metacircular evaluator evaluates operands from left to right or from right to left. Its evaluation order is inh...

2015/09/08 21:48
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【SICP练习】137 练习3.68

练习3-68 原文 Exercise 3.68. Louis Reasoner thinks that building a stream of pairs from three parts is unnecessarily complicated. Instead of separating the pair (S0,T0) from th...

【C++注意事项】5 Top-level const , The auto and decltype Type Specifier

top-level const As we’ve seen, a pointer is an object that can point to a different object. As a result, we can talk independently about whether a pointer is const and whether...

【SICP练习】107 练习3.8

练习3-8 原文 Exercise 3.8. When we defined the evaluation model in section 1.1.3, we said that the first step in evaluating an expression is to evaluate its subexpressions. But ...

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