本文只讨论lua #取表长度。官方解释:The Length Operator#. The length of a string is its number of bytes (that is, the usual meaning of string length when each character is one byte).__len metamethod (see §2
openresty开发系列19--lua的table操作Lua中table内部实际采用哈希表和数组分别保存键值对、普通值；下标从1开始不推荐混合使用这两种赋值方式。local color={first="red", "blue", third="green", "yellow"}
print(color["first"]) --> output: red
p
作者：糊涂小蜗牛 取长度使用到的函数/*
** Try to find a boundary in table 't'. A 'boundary' is an integer index
** such that t[i] is non-nil and t[i+1] is nil (and 0 if t[1] is nil).
*/
lua_Unsigned lua
