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CDs and Records
CDs and Records CDs and Records To keep track of CDs that need to be ripped to MP3s and which CDs should be ripped first, each record in the database will contain the title and... -
Chapter 10 总结 (Summary)
Chapter 10 总结 (Summary) Chapter 10 总结 (Summary) 调用 eval 是让 Lisp 将列表视为代码的一种方法，但这是不必要而且效率低落的。 你通过叙说一个调用会展开成什么来定义一个宏。台面底下，宏只是返回表达式的函数。 一个使用反引号定义的主体看起来像它会产生出的展开式 (expansion)。 宏设计... -
3.14 关联列表 (Assoc-lists)
3.14 关联列表 (Assoc-lists) 3.14 关联列表 (Assoc-lists) 用 Cons 对象来表示映射 (mapping)也是很自然的。一个由 Cons 对象组成的列表称之为关联列表(assoc-listor alist)。这样的列表可以表示一个翻译的集合，举例来说： > ( setf trans '((+ . "add... -
Wrapping Up（总结）
Wrapping Up（总结） Wrapping Up（总结） Now, an interesting thing has happened. You removed duplication and made the code more efficient and more general at the same time. That’s often... -
Lists and Lisps
Lists and Lisps Lists and Lisps ALL CAPS • SO RIGHT YET SO WRONG. Lisps are famous for having little distinction between data and code. They use the same structures to repr... -
Rest Parameters（剩余形参）
Rest Parameters（剩余形参） Rest Parameters（剩余形参） Optional parameters are just the thing when you have discrete parameters for which the caller may or may not want to provide values.... -
4.1 数组 (Array)
4.1 数组 (Array) 4.1 数组 (Array) 在 Common Lisp 里，你可以调用 make-array 来构造一个数组，第一个实参为一个指定数组维度的列表。要构造一个 2 x 3 的数组，我们可以： > ( setf arr ( make - array '(2 3) :initial-element nil)) ... -
Strings（字符串）
Strings（字符串） Strings（字符串） As mentioned earlier, strings in Common Lisp are really a composite data type, namely, a one-dimensional array of characters. Consequently, I’ll cover... -
Constructing New Pathnames（构造新路径名）
Constructing New Pathnames（构造新路径名） Constructing New Pathnames（构造新路径名） You can construct arbitrary pathnames using the MAKE-PATHNAME function. It takes one keyword argument for... -
Good Object-Oriented Design
Good Object-Oriented Design Good Object-Oriented Design That’s about it for the main features of Common Lisp’s object system. If you have lots of experience with object-oriente...