Computed Property

Calculate a derived value from object-style fields.

computed_property.lua

local width = 
local height = 3
local area = ({width = width, height = height}).width * ({width = width, height = height}).height
local label = "area:" .. area
print("width=" .. width)
print("height=" .. height)
print("label=" .. label)

local width = 
local height = 3
local area = ({width = width, height = height}).width * ({width = width, height = height}).height
local label = "area:" .. area
print("width=" .. width)
print("height=" .. height)
print("label=" .. label)

local width = 
local height = 3
local area = ({width = width, height = height}).width * ({width = width, height = height}).height
local label = "area:" .. area
print("width=" .. width)
print("height=" .. height)
print("label=" .. label)

computed property A computed property is not stored directly; it is calculated from other fields.