Lua丨元表——__tostring

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--将表当作函数使用，输出表组合在一起的内容
mytable={"lua","java","c#"}

mymetatable={
__tostring=function(mytable)
	local str=""
	for k,v in pairs(mytable) do
		str=str..v..","
	end
	return str
end
}

mytable=setmetatable(mytable,mymetatable)

print(mytable)



>lua -e "io.stdout:setvbuf 'no'" "table.lua" 
lua,java,c#,
>Exit code: 0