-- to uppercase. print("string.upper:"..string.upper(str)) -- to lowercase. print("string.lower:"..string.lower(str)) --substr from index 2 to index 4. print("string.sub:"..string.sub(str, 2, 4)) print("string.sub:"..string.sub(str, 1, -1)) print("string.sub:"..stri...
return NULL; } //Get the length of a string int strlen(const char *str) { assert( str!=NULL ); int length = 0; while( *str++!='\0' ) length++; return length; } // Copy a string /*void strcpy(char *strDest, const char *strSrc) { assert( (strSrc!=NULL)&&(strDest!=NUL...
string.upper(s)返回大写字母的字符串string.rep(s,n)对字符串进行重复定义string.rep([字符串],[重复次数]) 例子string.rep("Hello",4) -- HelloHelloHelloHello string.reverse(s)返回反转后的字符串。string.sub(s,i[,j])返回子字符串。定义string.sub([字符串],[开始字符下标],[结束字符下标]=-1)...
> = string.gsub("Hello Lua user", "(%w+)", function(w) return string.len(w) end) -- replace with lengths 5 3 4 3 > = string.gsub("banana", "(a)", string.upper) -- make all "a"s found uppercase bAnAnA 3 > = string.gsub("banana", "(a)(n)", function(a,b) return...
string.upper(s) 小写转大写 string.dump 返回一个string,代表了函数的二进制码,返回的这个string可以被loadstring执行。可以实现函数序列化,函数可以传递了,甚至把函数传递到另一个进程都可以的。可以实现在其他作用域访问不同的地方的函数。 模式匹配 --- string.find (s, pattern [, init [, plain]]) patter...
"a string with \"quotes\" and \ new line" The options c, d, E, e, f, g, G, i, o, u, X, and x all expect a number as argument, whereas q and s expect a string. This function does not accept string values containing embedded zeros, except as arguments to the q option. ...
> = string.gsub("Hello Lua user", "(%w+)", function(w) return string.len(w) end) -- replace with lengths 5 3 4 3 > = string.gsub("banana", "(a)", string.upper) -- make all "a"s found uppercase bAnAnA 3 > = string.gsub("banana", "(a)(n)", function(a,b) return...
minlen(5) -- And if everything is still okay, convert that string to upper case -- (UTF-8 is not yet supported in upper): -- 4. upper local myvalidator = v.string.trim:minlen(5).upper -- This example will return false and "minlen" local valid, value = myvalidator(" \n\t a...
format("%x", decimal) -- 将十进制数转换为十六进制数(大写) local hexUpper = string.format("%X", decimal) -- 输出结果 print("Decimal:", decimal) print("Hex (lowercase):", hex) print("Hex (uppercase):", hexUpper) 运行此脚本时,程序将等待用户输入一个十进制数,然后将其转换为十六进制...
5--a upper case hex string 6 7--Check the arguments 8if#arg ~= 2 then 9print("Usage:hexstr2bytes.lua <Input Hex String File> <Output Bytes File>\n"); 10os.exit(); 11end 12 13--Open input hex string file 14local hexstrfile=io.open(arg[1],"rb"); ...