Nil

---

描述

在 Lua 中，nil 表示不存在或虚无。它通常用于移除表中的值或销毁脚本中的变量。例如：

local dictionaryTable = {
	Monday = 1,
	Tuesday = 2,
	Wednesday = 3
}
-- Output value of 'Tuesday' key
print(dictionaryTable.Tuesday)
-- Clear 'Tuesday' key
dictionaryTable.Tuesday = nil
-- Output value of key again
print(dictionaryTable.Tuesday)

在 MiniStudio 中，nil 还可用于清除 SandboxNode 对象的 Parent （父项）值并有效地将其从游戏中移除，但这可能会使该对象重生。考虑以下示例：

-- Create a new brick
local part = SandboxNode.New("Model")
-- Parent new part to the workspace, making it viewable
part.Parent = workspace 
wait(1)
-- Remove the part from view, but not from memory
part.Parent = nil
wait(1)
-- Part still exists because it's referenced by the variable 'part', so it can be returned to view
part.Parent = workspace 
wait(1)
-- Remove the part from view again
part.Parent = nil
-- Clear part reference so it gets picked up by the garbage collector
part = nil