topicos

Indice
	versões
	rvm
		instalação
	ruby instalação

	2 projects

	linguagem 
		types
		utilização
		modificado a class



- versionamento (rvm)
	1.8.6[-p420]
	1.8.7[-p358]
	1.8.7-head
	1.9.1[-p431]
	1.9.2-p180
	1.9.2-p290
	1.9.2[-p318]
	1.9.2-head
	1.9.3-preview1
	1.9.3-rc1
	1.9.3-p0
	1.9.3[-p125]
	1.9.3-head

-para gerenciar temos o RVM

 	install, manage, and work
 	
	(Ruby, Gems and IRB)

Instalação
	-install packages (require later)
		sudo apt-get update
		sudo apt-get install build-essential <b>git-core curl</b>

	Lastest RVM
		bash -s stable < <(curl -s https://raw.github.com/wayneeseguin/rvm/master/binscripts/rvm-installer)
		echo '[[ -s "$HOME/.rvm/scripts/rvm" ]] && source "$HOME/.rvm/scripts/rvm"' >> ~/.bashrc
		. ~/.bashrc

	- install essential packages 
		sudo apt-get install build-essential openssl libreadline6 libreadline6-dev curl git-core zlib1g zlib1g-dev libssl-dev libyaml-dev libsqlite3-0 libsqlite3-dev sqlite3 libxml2-dev libxslt-dev autoconf libc6-dev ncurses-dev automake libtool bison subversion

Ruby instalation
	rvm install 1.9.3
	ruby -v
	rvm --default use 1.9.3

- Gemsets

	new 2 projects

	oldVersion
		file .rvmrc
		rvm use 1.8.7@oldVersion
		rvm gemset create oldVersion

	newVersion
		file .rvmrc
		rvm use 1.9.3@newVersion
		rvm gemset create newVersion

gem install haml
gem list
rvm list
rvm gemset list


Isolated projects







linguagem interpretada

Everything is object
	true, nil, false

IRB
	Object
		Numeric
			Integer
				Fixnum
				Bignum
			float
		String
		Symbol
		Array
		Hash
		Regexp

	1
	1,5
	"This is String".class
	:name
	[1, "asfsd", [1, 2]]
	{"RS" => 10_914_128, "SC" => 6_248_436, "PR" => 10_439_601}

		explain the diference bettwen hash -> array
			array nao tem key
			hash custom key

	Contactening strings 
	puts "isso eh um teste de #{teste}"

	



	var = "vazio"
	var.empty? 	# => false


	class String
		def empty?
			self == "vazio" || self == ""
		end
	end

	class String
		def twoTimes
			self + self
		end
	end

	"eduardo".twoTimes
	1.twoTimes