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Lua

https://www.lua.org

The Lua programming language.

Features:

• Small, embeddable
• Dynamically, weakly typed
• Builtin coroutines

Often used as a configuration language (see Neovim).

Notes

• Programs are compiled into bytecode, which is then run by the Lua VM.
• Unlike most languages, indices start with 1.
• Variables are global by default. Use local to make a variable local.
• Tables are used as arrays, maps, and objects.
• Standard pairs/ipairs iterators are used to range over a table.
• Strings are concatenated with the .. operator.
• and/or are used as a ternary operator, e.g. return cond and 1 or 2.
• There is no continue, use goto + ::label::.

Tooling

• Language server: https://github.com/LuaLS/lua-language-server
• Type annotations: https://luals.github.io/wiki/annotations