Emacs Lisp 学习笔记

Transcript

1. Emacs Lisp 学习笔记 Zhang Chi @ClvrObj
2. ⼀一个简单目标
3. 写⼀一个方法检查文件是否有 # -*- coding: utf-8 -*- 没有就给加上
4. ⼀一步⼀一步来
5. 基本元素
6. list, number, string, t, nil
7. 在Emacs中执行和测试
8. M-x lisp-interaction-mode then C-j or C-x C-e
9. 自带的⼀一些常用方法
10. + - * / 1+ 1- /= = > < equal and or not
11. 方法声明
12. (defun func-name (arg, ...) "documentation..." body-of-function)
13. 方法调用
14. (func-name arg, ...)
15. 接受用户输入
16. (defun func-name (arg, ...) "documentation..." (interactive) body-of-function)
17. 逻辑控制
18. let, if, cond, progn
19. (let ((variable value) (variable value) ...) body...)
20. (if true-or-false-test action-if-true action-if-false)
21. 相当于switch case (cond (first-true-or-false-test first- consequent) (second-true-or-false-test second- consequent) (third-true-or-false-test third- consequent) ...)
22. 执行多个步骤 (progn body...)
23. 回到目标
24. 写⼀一个方法检查文件是否有 # -*- coding: utf-8 -*- 没有就给加上
25. 目标达成
26. (defun add-py-header () "check and add # -*- coding: utf-8 -*-" (interactive) (let ((pyheader "# -*- coding: utf-8 -*-")) (if (not (equal pyheader (buffer-substring-no- properties 1 (1+ (length pyheader))))) (progn (goto-char 1) (insert (concat pyheader "\n\n")))))) https://gist.github.com/3795035/
27. Lisp
28. Born in 1958 by John McCarthy (1927 - 2011)
29. 参考 • [为什么Lisp语言如此先进？（译文）](http://www.ruanyifeng.com/blog/ 2010/10/why_lisp_is_superior.html) • [Programming in Emacs Lisp](http://www.gnu.org/software/emacs/emacs- lisp-intro/html_mono/emacs-lisp-intro.html#multiply_002dby_002dseven-in- detail) • [Learning GNU Emacs](http://book.douban.com/subject/1431970/) Chapter 11 • [Common Emacs Lisp Functions](http://ergoemacs.org/emacs/ elisp_common_functions.html)
30. :sparkles:Thanks!:sparkles: