Lua编程示例（四）：Lua标准库之表库、字符串库、系统库

 tb1 = { "alpha","log","gamme"} print(table.concat(tb1," , ")) print(table.concat(tb1,"\n",nil,2)) print() tb1[88.99] = 'aaa' --返回索引值最大的值，并且计算小数 print(table.maxn(tb1)) print() --默认删除索引最大的元素并返回 print(table.remove(tb1)) print() table.insert(tb1,'3423') table.sort(tb1) print(table.concat(tb1," , ")) function sortFunc(a,b) return a>b end table.sort(tb1,sortFunc) print(table.concat(tb1," , ")) print() print(string.len("")) print(string.len("abcd")) print(string.sub("welcome",1,3)) print(string.sub("welcome",1,-1)) print(string.sub("welcome",1,-5)) print() print(os.date()) print() do local x = os.clock() local s = 0 for i=1,100000000 do s= s+i end print(string.format("the passed time is %.2f\n",os.clock()-x)) end s = "hello world" i, j = string.find(s, "hello") print(i, j)    --> 1  5 print(string.sub(s, i, j))  --> hello print(string.find(s, "world"))  --> 7  11 i, j = string.find(s, "l") print(i, j)    --> 3  3 print(string.find(s, "lll"))  --> nil s = string.gsub("Lua is super", "is","makes") print(s) s = string.gsub(s,"a","X") print(s) s = string.gsub(s,"X","a",1) print(s) 

 alpha , log , gamme alpha log 88.99 gamme 3423 , alpha , log log , alpha , 3423 0 4 wel welcome wel 11/24/11 17:55:44 the passed time is 2.12 1 5 hello 7 11 3 3 nil Lua makes super LuX mXkes super Lua mXkes super