Prayoch Rujira@Clockup studio

http://www.lua.org/

LANGUAGE FROM THE MOON

install Homebrew

http://brew.sh/

install Lua

$>brew install lua

INSTALLATION

http://www.thijsschreijer.nl/blog/?p=863

FOR WINDOWS

print("Hello world")

Create file hello.lua and write this code

And then execute in command line$>lua hello.lua

THE FIRST PROGRAM

NO TYPE DECLARATION

somchai = "somchai" print(somchai) somchai = 1984 print(somchai) somchai = {} print(somchai)

GLOBAL BY DEFAULT function createSomchai() somchai = "My father" end !

function greetSomchai() print("Hello"..somchai) end !

createSomchai() print(somchai) greetSomchai()

LOCAL DECLARATION

functon createSomchai() local somchai = "My father" end

TABLE RULES!

There is No Array, Class, Dictionary etc. Just Table

TABLE AS ARRAY

somchaiChildrens = { "Hercules", "Perseus", "Kratos" }

TABLE AS DATA OBJECT

somchai = { name = "somchai", age=42, hasMarried=true }

TABLE AS A MODULE

somchai = { function sleep() end function wake() end function work() end }

ALSO OTHERS DATA STRUCTURE

Queue, Set, LinkedList, Tree and more. Are apply on table

FUNCTIONfunction subProcess() print("I'm subprocess") end !

function mainProcess(sub) sub() end !

mainProcess(subProcess)

FUNCTIONrules = { function() print("I'm a") end, function() print("I'm b") end, } !for key, value in pairs(rules) do value() end

NO TRY-CATCH !?When dealing with function that will throw error use

pcall instead.

function willThrowError() error("That's error!!") end !status, result = pcall(willThrowError) !print("status="..tostring(status)) print("errorMessage="..result)

NO TRY-CATCH !?function willNotThrowError() return "No error" end !

status, result = pcall(willNotThrowError) !

print("status="..tostring(status)) print("realResult="..result)

WRITING A MODULE

local M = {} !

function M.doSomething() end !

return M

IMPORT AND USE

m = require("M") !

m.doSomething()

UNIT TESTING FRAMEWORK

LuaUnit https://github.com/bluebird75/luaunit !

Busted http://olivinelabs.com/busted/

INSTALL BUSTED

Install Luarocks $>brew install luarocks

!

Install Busted $>luarocks install busted

!

Then try to execute busted $>busted

THE FIRST TESTCreate directory ‘spec’ and create file ‘first_spec.lua’

into it.

describe("The first test", function() it("false should not be true", function() assert.True(false) end) end)

THE FIRST TESTExecute ‘busted’ at root of project directory

$>busted

SAMPLE CODE IN SLIDE

https://github.com/j4cksw/lua-samples

OK Bye…