Lua 输出可变参数列表内容

在 Lua 中有8种基本数据类型：nil,boolean,number,string,user data,function,thread,table?

认识完，这几种基本类型就开始这篇博客的中心思想，目的就是在垒码过程中对数据进行输出：

function showPrintInfo(...)
	-- body
	local stringcat = ""
	for k,v in ipairs({...}) do 
		local subString = ""
		if type(v) == "boolean" then
			subString = (v == true and "true" or "false")
		elseif type(v) == "number" or type(v) == "string" then
			subString = tostring(v)
		elseif type(v) == "table" then
			printTable(v)
		else
			subString = "<数据是" .. type(v) .. "类型,未处理类型>"
		end
		stringcat = stringcat .. "    " .. subString
	end
	print(stringcat)
end

-- tab 		需要输出的 table 的对象
-- level	表的深度（可不填，直接从最外层遍历）
-- key 		该深度下表的索引（可不填，直接从 1 开始遍历）
function printTable(tab,level,key)
	-- body
	level = level or 1
	local indent = ""
	for i = 1,level do 
		indent = indent .. "    "
	end

	print(indent .. "{")

	key = ""
	for k,v in pairs(tab) do 
		if type(v) == "table" then
			key = k
			printTable(v,level + 1,key)
		else
            local content
			if type(v) == "string" then
				if k ~= #tab then
					content = string.format(indent .. "    " .. ""%s",",tostring(v))
				else 
					content = string.format(indent .. "    " .. ""%s"",tostring(v))
				end
				print(content)
			else
				if k ~= #tab then
					content = string.format(indent .. "    " .. "%s,tostring(v))
				else
					content = string.format(indent .. "    " .. "%s",tostring(v))
				end
				print(content)
			end
		end
	end

	print(indent .. "}")
end

测试代码：

local tab = { {"Jack","Lucy","John"},{18,20,19},{"CHINA","USA","UK"} }
showPrintInfo(true,123,tab)

输出结果：