Lua

When to Use

• Game Development (Roblox, WoW, Love2D)
• Embedded Systems
• Configuration scripting (Neovim, Nginx)
• Extending applications

Quick Start

print("Hello, World!")

function factorial(n)
  if n == 0 then
    return 1
  else
    return n * factorial(n - 1)
  end
end

Core Concepts

Tables

t = { key = "value", [1] = "first" }
print(t.key)

Metatables

Indices

Best Practices

• Use

  local

  variables by default (performance and scope)
• Use standard libraries where possible
• Understand table length operator

  #

  behavior with holes

• Pollute the global namespace
• Ignore

  nil

  (undefined variables are

  nil

  )

References

• Lua 5.4 Reference Manual