Lua编程示例（四）：Lua标准库之表库、字符串库、系统库_Lua

Lua编程示例（四）：Lua标准库之表库、字符串库、系统库

2020-05-06 10:33脚本之家 Lua

这篇文章主要介绍了Lua编程示例（四）：Lua标准库之表库、字符串库、系统库,需要的朋友可以参考下

				?

									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)

运行结果：

				?

									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