setmetatable

• Function that attaches a metatable to a table.

• Function that retrieves the metatable of a table.

• Triggered when accessing a non-existent key.

• Metamethod used to customize the behavior of the length operator (#).

__index

• Function that attaches a metatable to a table.

• Triggered when accessing a non-existent key.

• Metamethod that defines the behavior for converting a table to a string.

• True

getmetatable

• Metamethod that allows the table to be called as a function.

• Metamethod used to customize the behavior of the addition operator (+).

• Metamethod that defines the behavior for converting a table to a string.

• Function that retrieves the metatable of a table.

__call

• Function that attaches a metatable to a table.

• local myTable = {}

  local myMetatable = {}

  setmetatable(myTable, myMetatable)

• Metamethod that allows the table to be called as a function.

• Triggered when accessing a non-existent key.

__add

• Function that attaches a metatable to a table.

• Metamethod used to customize the behavior of the addition operator (+).

• Metamethod that allows the table to be called as a function.

• Function that retrieves the metatable of a table.

__tostring

• Metamethod that defines the behavior for converting a table to a string.

• myMetatable.__index = function(table,key)

  return "Key '" .. key .. "' not found!"

  end

  print(myTable.someKey) -- Output: Key 'someKey' not found!

• True

• Field in a metatable that declares weak references in weak tables.

__newindex

• Metamethod used to customize the behavior of the addition operator (+).

• Custom iterator when using generalized iteration.

• Metamethod triggered when assigning a value to a non-existent key.

• Metamethod that defines the behavior for converting a table to a string.

__len

• Metamethod that defines the behavior for converting a table to a string.

• Metamethod triggered when assigning a value to a non-existent key.

• Metamethod used to customize behavior for the modulus operator (%).

• Metamethod used to customize the behavior of the length operator (#).

__metatable

• Metamethod that defines the behavior for the subtraction operator (-).

• Field in a metatable that protects it from being accessed or changed.

• Metamethod invoked when the equality operator (==) is used.

• Metamethod that handles the less than comparison (<) operator.

__eq

• Metamethod invoked when the equality operator (==) is used.

• Field in a metatable that protects it from being accessed or changed.

• Field in a metatable that declares weak references in weak tables.

• True