Télécharger Cours: Erlang And Lua - Apprendre En Ligne

Sommaire: Erlang And Lua

I Embedded Scripting Languages II Overview of the Lua Language III Using Lua in Erlang IV Erlmon, a system monitoring tool that uses Lua

Extrait du cours erlang And Lua

I : Embedded Scripting Languages Language…………Description Javascript………..Ubiquitous Reia…………………Ruby+Python/Erlang Lua………………….Fast, lightweight; popular with gamers flowchart II :  Lua Overview Lua is a powerful, fast, lightweight,embeddable scripting language, often used for configuration, very popular in the gaming communities. Things I would say about Lua In an Elevator With a Geek… -Simple, Ruby-like syntax -Designed to be embedded -Stack-based interface to the host -Compiles cleanly nearly everywhere – ANSI-C -Tables are the key to Lua’s power -First class functions allow closures, coroutines -The only real oddity is that indices start at 1 or, you can read the poster… Lua Types nil boolean number string table function userdata thread Variables are typeless Only values have types All values are ‘first class values’ Numbers are always floats Tables “Sets” and “Arrays” are both implemented via Tables. Most similar to Ruby Hashes, but fields addressable as methods on the table. t = {} t = { a=7;b=print;c=”yahtzee” } t.a — 7 t[‘c’] — “yahtzee” print(type(t.b)) — “function” Functions Functions are first-class Can be anonymous Can take a variable number of parameters Tables and Functions Together m = create_message(“[email protected]”, “[email protected]”,“you have too many emails”) > m.send() Sending from [email protected] to [email protected]

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