function isDigit(s) { var patrn=/^[0-9]{1,20}$/; if (!patrn.exec(s)) return false return true } //校验登录名：只能输入5-20个以字母开头、可带数字、“_”、“.”的字串 function isRegisterUserName(s) { var patrn=/^[a-zA-Z]{1}([a-zA-Z0-9]|[._]){4,19}$/; if (!patrn.exec(s)) return fal
编译原理龙书答案 完整性高 第二章 2.2 Exercises for Section 2.2 2.2.1 Consider the context-free grammar: S -> S S + | S S * | a Show how the string aa+a* can be generated by this grammar. Construct a parse tree for this string. What language does this grammar ge
编译好的x265，带y4m文件 Syntax: x265 [options] infile [-o] outfile infile can be YUV or Y4M outfile is raw HEVC bitstream Executable Options: -h/--help Show this help text and exit -V/--version Show version info and exit Output Options: -o/--output Bitstre
``Crafting a Compiler'' by Charles N. Fisher & Richard J. LeBlanc, Jr. 1988. Benjamin/Cummings Publishing Company. Menlo Park, CA. Brief Contents xvi 1 Introduction 1 2 A Simple Compiler 31 3 Scanning—Theory and Practice 57 4 Grammars and Parsing 11
阿法狗的算法描述，Google发表在nature上的论文。 Mastering the game of Go with deep neural networks and tree search The game of Go has long been viewed as the most challenging of classic games for artificial intelligence owing to its enormous search space and the diff
