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Lua __index metamethod

Lua reference for lua __index metamethod.

Syntax

local defaults = { active = true }
setmetatable(user, { __index = defaults })

Examples

Lua __index metamethod example

A focused example you can adapt while practising.

local defaults = { active = true }
setmetatable(user, { __index = defaults })

Best practices

  • Start with the smallest working example, then adapt it to your project.
  • Use the language’s standard library and idioms before introducing extra dependencies.

Runtime & versions

Lua interpreter or a host application. Feature availability depends on the language and runtime version used by your project; consult the official reference below.

Lua reference manuals

Specifications & further reading