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,","))
functionsortFunc(a,b)
returna>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
localx=os.clock()
locals=0
fori=1,100000000dos=s+iend
print(string.format("thepassedtimeis%.2f\n",os.clock()-x))
end
s="helloworld"
i,j=string.find(s,"hello")
print(i,j)-->15
print(string.sub(s,i,j))-->hello
print(string.find(s,"world"))-->711
i,j=string.find(s,"l")
print(i,j)-->33
print(string.find(s,"lll"))-->nil
s=string.gsub("Luaissuper","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 11/24/1117:55:44 thepassedtimeis2.12 15 hello 711 33 nil Luamakessuper LuXmXkessuper LuamXkessuper