Common Lisp. A gentle introduction to symbolic computation Touretzky D.S.
Touretzky D.S.
ISBN: 0-8053-0492-4
Год: 1990
Издательство: The Benjamin/Cummings Publishing Company, Inc.
Количество страниц: 587
Язык: Английский
Формат: PDF / RAR
Формат файла: RAR
This chapter begins with an overview of the notions of function and data, followed by examples of several built-in Lisp functions. If you already have some experience programming in other languages, you can flip through this chapter in just a few minutes. You'll see arithmetic functions, followed by an introduction to symbols, one of the key datatypes of Lisp, and predicates, which answer yes-or-no questions. When you think you've grasped this material, read the summary section on page 26 to test your understanding.
If you're new to programming, this chapter is designed specifically for you. We'll start by explaining what functions and data are. The term data means information, such as numbers, words, or lists of things. You can think of a function as a box through which data flows. The function operates on the data in some way, and the result is what flows out.
After covering some of the built-in functions provided by Lisp, we will learn how to put existing functions together to make new ones—the essence of computer programming. Several useful techniques for creating new functions will then be presented.
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