确定一个文件是否存在 (file-exists-p "~/test.el") 看看它的帮助文档: file-exists-p is a built-in function in `C source code'.(file-exists-p FILENAME)Return t if file FILENAME exists (whether or not you can read
运行错误信息 运行一句list (this is an unquoted list) Emacs(版本22之后)会打开一额个*Backtrace*的buffer,里面显示: Debugger entered--Lisp error: (void-function this)(this is an unquoted list)eval((this is an unquoted