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Lua一日游:(2)Table和Array

 2 years ago
source link: https://changkun.de/blog/posts/lua-2/
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Lua一日游:(2)Table和Array

Published at:

2014-03-09

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Reading: 389 words ~1min

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PV/UV: 3/3

我们直接来看代码：

-- 定义一个Table
Config = {hello = "hello lua", world = "world"} -- 一个被叫做Config的Table被定义出来，键值hello索引的值是"hello lua"，类推
Config.words = "hello"  -- 键值为words索引的值为"hello"
Config.num = 100  -- 键值为num索引的值为100
Config["name"] = "zhangsan"

print(Config.words)     -- 访问形式1  本质是键值
print(Config["words"])  -- 访问形式2
print(Config.name)      -- 更多的例子
print(Config.hello)     -- 更多的例子

-- Table的遍历
for key, var in pairs(Config) do  -- 使用pairs对Table进行遍历
	print(key, var)  -- 分别打印键值和值
end

-- Array
arr = {1, 2, 3, 4, "hello"} -- 与Table不同的是，Array没有填写键值

for key, var in pairs(arr) do -- 同样是使用pairs对Array进行遍历
	print(key, var)  -- 值得注意的是数组的索引是从1开始的
end

arr2 = {} -- 定义了另一个Array
for var=1, 100 do
	table.insert(arr2,1,var) -- 向arr2中添加元素
end

for key, var in pairs(arr2) do -- 遍历Array
	print(key, var)
end

print(table.maxn(arr2)) -- 求Array的长度

report

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