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What are lex and yacc?Lex and yacc are two programs usually mentioned in the same breath that implement Look-Ahead-Left-Right (LALR -- i.e. not "recursive descent") parsing of non-ambiguous context-free (i.e. not "natural language") grammars. But if you haven't taken a class 阅读全文
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GIT(1) Git Manual GIT(1)NAME git - the stupid content trackerSYNOPSIS git [--version] [--help] [-c =] [--exec-path[=]] [--html-path] [--man-path] [--info-path] [-p|--paginate|--no-pager] [--no-replace-objects] [--bare] [--git-dir=] [--work-tree=] [--namespac... 阅读全文
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http://sei.pku.edu.cn/~yaoguo/ACT11/DragonBook-2v2.pdfIntroductionProgramming languages are notations for describing computations to people and to machines. The world as we know it depends on programming languages, because all the software running on all the computers was written in some programming 阅读全文