What's the Javascript 'delete' keyword equivalent in Lua?

Question

Javascript delete keyword deletes a named variable slot from nearest execution environment which it defined. What's the equivalent in Lua?

Answer 1

var = nil

Environments in Lua are tables, and tables cannot contain nil value - assigning nil to a key in a table effectively deletes that key from the table.

Here is a quote from "Programming in Lua":

Like global variables, table fields evaluate to nil if they are not initialized. Also like global variables, you can assign nil to a table field to delete it. That is not a coincidence: Lua stores global variables in ordinary tables