t = { 1, 2, 3, nil, 4,} for k, v in ipairs(t) doprint(k, v)end print("---------------------------") for k, v in pairs(t) doprint(k, v)end t = {} , do table.insert(t, i*i) end t[] = nil t[] = nil print(#t) --10, not right --right way --~ 1 1 --~…
http://wiki.nginx.org/HttpLuaModule#Directives Name ngx_lua - Embed the power of Lua into Nginx This module is not distributed with the Nginx source. See the installation instructions. Status This module is under active development and is production…
标准库提供了集中迭代器,包括迭代文件每行的(io.lines),迭代table元素的(pairs),迭代数组元素的(ipairs),迭代字符串中单词的 (string.gmatch)等等.LUA手册中对与pairs,ipairs解释如下: ipairs (t) Returns three values: an iterator function, the table t, and 0, so that the construction for i,v in ipairs(t) do body e…
lua 中pairs 和 ipairs区别 标准库提供了集中迭代器,包括迭代文件每行的(io.lines),迭代table元素的(pairs),迭代数组元素的(ipairs),迭代字符串中单词的 (string.gmatch)等等.LUA手册中对与pairs,ipairs解释如下: ipairs (t) Returns three values: an iterator function, the table t, and 0, so that the construction for i,v…
ipairs (t) Returns three values: an iterator function, the table t, and 0, so that the construction for i,v in ipairs(t) do body end will iterate over the pairs (1,t[1]), (2,t[2]), ···, up to the first integer key absent from the table. pairs (t) Ret…
local tmp_tab = {}; tmp_tab[]="lua"; tmp_tab[]="hello" tmp_tab[]="aaa" for k,v in pairs(tmp_tab) do print(k..v) print(v) end for k,v in ipairs(tmp_tab) do print(k..v) print(v) end pairs 循环表中的全部元素 ipairs只能循环下标为1开始连续的元素,遇到下标返…
1.什么是table? table是Lua最复杂最强大的数据结构,Lua本身并不是面向对象语言,但是对面向对象中毒比较深的程序员,可以借助table”完美”地模拟面向对象编程.最简单地,我们可以把table理解为数组,最复杂的,我们可以把table理解为”世间万物”,因为它可以创造出很多你想象不到的东西.一个字,自由度非常大~! 2.如何创建一个table? local a = {} 或者 local a = {["x"] = 12, ["mutou"] = 99,…
迭代器for遍历table时,ipairs和pairs的区别: 区别一:ipairs遇到nil会停止,pairs会输出nil值然后继续下去 区别二: , b = , x = , y = , "Good", nil, "Bye"} -- for i,v in ipairs(a) do -- print(v) -- end for k,v in pairs(a) do print(k,v) end 可见:ipairs并不会输出table中存储的键值对,会跳过键值对,然后…
为了看出两者的区别,首先定义一个table: a={"Hello","World";a=1,b=2,z=3,x=10,y=20;"Good","Bye"} 使用ipairs对其进行遍历: for i, v in ipairs(a) do print(v) end 输出的结果是: HelloWorldGoodBye 可见ipairs并不会输出table中存储的键值对,会跳过键值对,然后按顺序输出table中的值. 再使用pair…
pairs Returns three values: the next function, the table t, and nil, so that the construction for k,v in pairs(t) do body end will iterate over all key–value pairs of table t. See function next for the caveats of modifying the table during its traver…
cpp_object_map = {}setmetatable(cpp_object_map, { __mode = "kv" }) local search_basesearch_base = function(t, k) local base_list = rawget(t, "__base_list") if not base_list then return end local v for i = 1, #base_list do local base =…
table.maxn (table) Returns the largest positive numerical index of the given table, or zero if the table has no positive numerical indices. (To do its job this function does a linear traversal of the whole table.) 返回表中最大的正数值index. 说明: 1. 此接口不是统计表中元素的…
迭代器 http://www.tutorialspoint.com/lua/lua_iterators.htm 迭代器能够让你遍历某个集合或者容器中的每一个元素. 对于lua来说, 集合通常指代 table, 用于创建变化的数据结构, 类似数组. Iterator is a construct that enables you to traverse through the elements of the so called collection or container. In Lua, th…
