diff --git a/README.md b/README.md
old mode 100644
new mode 100755
diff --git a/Vagrantfile b/Vagrantfile
old mode 100644
new mode 100755
diff --git a/book_store/lib/biblioteca.rb b/book_store/lib/biblioteca.rb
old mode 100644
new mode 100755
diff --git a/book_store/lib/livro.rb b/book_store/lib/livro.rb
old mode 100644
new mode 100755
diff --git a/book_store/lib/loja_virtual.rb b/book_store/lib/loja_virtual.rb
old mode 100644
new mode 100755
diff --git a/book_store/lib/relatorio.rb b/book_store/lib/relatorio.rb
old mode 100644
new mode 100755
diff --git a/lang/.DS_Store b/lang/.DS_Store
index a57d86f..889dee1 100755
Binary files a/lang/.DS_Store and b/lang/.DS_Store differ
diff --git a/lang/00_object.rb b/lang/00_object.rb
old mode 100644
new mode 100755
diff --git a/lang/README.md b/lang/README.md
old mode 100644
new mode 100755
diff --git a/lang/accessors.rb b/lang/accessors.rb
new file mode 100755
index 0000000..61e47b1
--- /dev/null
+++ b/lang/accessors.rb
@@ -0,0 +1,26 @@
+# GET
+class Person
+	attr_reader :name, :age
+	def initialize(name,age)
+		@name = name
+		@age = age
+	end
+end
+
+# SET
+class Person
+	attr_writer :name, :age
+	def initialize(name,age)
+		@name = name
+		@age = age
+	end
+end
+
+# GET / SET
+class Person
+	attr_accessor :name, :age
+	def initialize(name,age)
+		@name = name
+		@age = age
+	end
+end
\ No newline at end of file
diff --git a/lang/arrays/concatenate.rb b/lang/arrays/concatenate.rb
new file mode 100755
index 0000000..e69de29
diff --git a/lang/arrays/create.rb b/lang/arrays/create.rb
new file mode 100755
index 0000000..feb6f23
--- /dev/null
+++ b/lang/arrays/create.rb
@@ -0,0 +1,10 @@
+p [].class.ancestors
+
+a = []
+b = ["zero",1,2.0,"bla".length]
+c = Array.new
+d = Array.new(4){|index| index ** 2}
+e = %w{Array de string}
+
+p a; p b; p c; p d; p e;
+
diff --git a/lang/arrays/enumerator.rb b/lang/arrays/enumerator.rb
new file mode 100755
index 0000000..e69de29
diff --git a/lang/arrays/iterator.rb b/lang/arrays/iterator.rb
new file mode 100755
index 0000000..e69de29
diff --git a/lang/class.rb b/lang/class.rb
new file mode 100755
index 0000000..476eee1
--- /dev/null
+++ b/lang/class.rb
@@ -0,0 +1,58 @@
+# encoding: utf-8
+
+class Teste
+end
+tes = Teste.new
+puts tes.class
+p tes.methods.sort
+puts tes.to_s
+
+
+class Celular
+  #constantes
+	TECLAS = 30 
+	
+	#variavel de class
+	@@visor = "digital" 
+  
+	attr_reader :marca
+
+	def initialize(marca, cor)
+		@marca, @cor = marca, cor
+	end
+	
+	def self.desligar
+		true
+	end
+	
+	def discar(numero)
+		"Discando o numero #{numero}"
+	end
+	
+	def visor
+		@@visor
+	end
+
+end
+
+# Injetando method a uma class
+def Celular.to_s
+	"metodo dinamico"
+end
+
+p defined? Celular
+cel = Celular.new("motorola", "vermelho")
+p cel.visor
+p Celular.to_s
+
+
+class Phone  
+end
+
+# CLASSES DINAMICAS
+Tablet = Class.new
+p Tablet.ancestors
+
+
+Mobile = Class.new(Phone)
+p Mobile.ancestors
diff --git a/lang/class/accessors.rb b/lang/class/accessors.rb
old mode 100644
new mode 100755
diff --git a/lang/class/class.rb b/lang/class/class.rb
new file mode 100755
index 0000000..476eee1
--- /dev/null
+++ b/lang/class/class.rb
@@ -0,0 +1,58 @@
+# encoding: utf-8
+
+class Teste
+end
+tes = Teste.new
+puts tes.class
+p tes.methods.sort
+puts tes.to_s
+
+
+class Celular
+  #constantes
+	TECLAS = 30 
+	
+	#variavel de class
+	@@visor = "digital" 
+  
+	attr_reader :marca
+
+	def initialize(marca, cor)
+		@marca, @cor = marca, cor
+	end
+	
+	def self.desligar
+		true
+	end
+	
+	def discar(numero)
+		"Discando o numero #{numero}"
+	end
+	
+	def visor
+		@@visor
+	end
+
+end
+
+# Injetando method a uma class
+def Celular.to_s
+	"metodo dinamico"
+end
+
+p defined? Celular
+cel = Celular.new("motorola", "vermelho")
+p cel.visor
+p Celular.to_s
+
+
+class Phone  
+end
+
+# CLASSES DINAMICAS
+Tablet = Class.new
+p Tablet.ancestors
+
+
+Mobile = Class.new(Phone)
+p Mobile.ancestors
diff --git a/lang/class/classes_dinamicas.rb b/lang/class/classes_dinamicas.rb
old mode 100644
new mode 100755
diff --git a/lang/class/estrutura.rb b/lang/class/estrutura.rb
old mode 100644
new mode 100755
diff --git a/lang/class/inheritance.rb b/lang/class/inheritance.rb
old mode 100644
new mode 100755
diff --git a/lang/class/method_lockup.rb b/lang/class/method_lockup.rb
old mode 100644
new mode 100755
diff --git a/lang/class/open_classes.rb b/lang/class/open_classes.rb
old mode 100644
new mode 100755
diff --git a/lang/class/variavel_class.rb b/lang/class/variavel_class.rb
old mode 100644
new mode 100755
diff --git a/lang/class/variavel_instance.rb b/lang/class/variavel_instance.rb
old mode 100644
new mode 100755
diff --git a/lang/comments.rb b/lang/comments.rb
old mode 100644
new mode 100755
diff --git a/lang/control_structure/if.rb b/lang/control_structure/if.rb
new file mode 100755
index 0000000..0cad3aa
--- /dev/null
+++ b/lang/control_structure/if.rb
@@ -0,0 +1,33 @@
+if (true) then
+	puts "test 1"
+else
+	puts "test 1 false"
+end
+
+
+if false
+	puts "test 2"
+else
+	puts "test 2 false"
+end
+
+
+if false
+	puts "test 3"
+elsif true
+	puts "test 3 elsif true"
+else
+	puts "test 3 false"
+end
+
+
+if true then puts "test 4 inline" end
+
+
+puts "test 5 inline end line" if true
+
+
+if true
+	puts "test 6 line one"  
+	puts "test 6 line two"
+end
\ No newline at end of file
diff --git a/lang/conventions.rb b/lang/conventions.rb
old mode 100644
new mode 100755
diff --git a/lang/datatypes/array/create.rb b/lang/datatypes/array/create.rb
new file mode 100755
index 0000000..bd343d7
--- /dev/null
+++ b/lang/datatypes/array/create.rb
@@ -0,0 +1,15 @@
+
+# [Array, Enumerable, Object, Kernel, BasicObject]
+
+ar = []
+ar = Array.new
+# cria com 5 elementos nil
+ar = Array.new 5
+# cria com 5 elementos 'a'
+ar = Array.new 5, "a"
+# cria com 4 elements personalizados
+ar = Array.new(4){|index| index ** 2}
+#array de string
+ar = %w{ a b c d }
+#array de simbolos
+ar = %i{ a b c d }
diff --git a/lang/datatypes/array/methods.rb b/lang/datatypes/array/methods.rb
new file mode 100755
index 0000000..e69de29
diff --git a/lang/datatypes/bignum.rb b/lang/datatypes/bignum.rb
old mode 100644
new mode 100755
diff --git a/lang/datatypes/constantes.rb b/lang/datatypes/constantes.rb
old mode 100644
new mode 100755
diff --git a/lang/datatypes/false_class.rb b/lang/datatypes/false_class.rb
old mode 100644
new mode 100755
diff --git a/lang/datatypes/fixnum.rb b/lang/datatypes/fixnum.rb
old mode 100644
new mode 100755
diff --git a/lang/datatypes/float.rb b/lang/datatypes/float.rb
old mode 100644
new mode 100755
diff --git a/lang/datatypes/hash/create.rb b/lang/datatypes/hash/create.rb
new file mode 100755
index 0000000..bdbae3a
--- /dev/null
+++ b/lang/datatypes/hash/create.rb
@@ -0,0 +1,18 @@
+
+has = {}
+has = { name: "Leandro", lastname: "Nunes" }
+
+has = Hash.new
+
+# Definir um valor padrão caso uma chave não seja encontrada 
+h = Hash.new("default value")
+
+h = {c: 1, b: 2, a: 3}
+
+h.default("default value")
+h.default = "default value"
+
+h.default_proc = lambda do |hash, key|
+  hash[key] = "Unknown %s key" % key.inspect
+end
+puts h[:e]
diff --git a/lang/datatypes/hash/hash.rb b/lang/datatypes/hash/hash.rb
new file mode 100755
index 0000000..ba07473
--- /dev/null
+++ b/lang/datatypes/hash/hash.rb
@@ -0,0 +1,13 @@
+# A forma que o hash é definido 
+has = {
+  name: "Leandro",
+  lastname: "Nunes"
+}
+
+
+# Definir um valor padrão caso uma chave não seja encontrada -> default_proc
+h = {c: 1, b: 2, a: 3}
+h.default_proc = lambda do |hash, key|
+  hash[key] = "Unknown %s key" % key.inspect
+end
+puts h[:e]
\ No newline at end of file
diff --git a/lang/datatypes/hash/try_convert.rb b/lang/datatypes/hash/try_convert.rb
new file mode 100755
index 0000000..395ad03
--- /dev/null
+++ b/lang/datatypes/hash/try_convert.rb
@@ -0,0 +1,18 @@
+#convertendo Objetos para hasg
+
+class Config 
+   def initialize(text)
+      @text = text
+   end           
+   
+   def to_hash
+     result = {}
+     @text.to_s.scan(/^(\w+) *= *(\d+)$/sim) do |name, value|
+       result[name] = value
+     end
+   result
+   end 
+end
+
+config = Config.new %(a = 1\nb = 2\nc = 3)
+puts Hash.try_convert(config)
\ No newline at end of file
diff --git a/lang/datatypes/nil_class.rb b/lang/datatypes/nil_class.rb
old mode 100644
new mode 100755
diff --git a/lang/datatypes/proc.rb b/lang/datatypes/proc.rb
old mode 100644
new mode 100755
diff --git a/lang/datatypes/range.rb b/lang/datatypes/range.rb
old mode 100644
new mode 100755
diff --git a/lang/datatypes/simbol.rb b/lang/datatypes/simbol.rb
old mode 100644
new mode 100755
diff --git a/lang/datatypes/string/create.rb b/lang/datatypes/string/create.rb
old mode 100644
new mode 100755
diff --git a/lang/datatypes/string/embedded.rb b/lang/datatypes/string/embedded.rb
old mode 100644
new mode 100755
diff --git a/lang/datatypes/string/encoding.rb b/lang/datatypes/string/encoding.rb
old mode 100644
new mode 100755
diff --git a/lang/datatypes/string/heredoc.rb b/lang/datatypes/string/heredoc.rb
old mode 100644
new mode 100755
diff --git a/lang/datatypes/string/methods.rb b/lang/datatypes/string/methods.rb
old mode 100644
new mode 100755
diff --git a/lang/datatypes/string/object.rb b/lang/datatypes/string/object.rb
old mode 100644
new mode 100755
diff --git a/lang/datatypes/true_class.rb b/lang/datatypes/true_class.rb
old mode 100644
new mode 100755
diff --git a/lang/date.rb b/lang/date.rb
new file mode 100755
index 0000000..d54c139
--- /dev/null
+++ b/lang/date.rb
@@ -0,0 +1,5 @@
+#As classes Date, DateTime e Time fazem parte da ST
+require "date"
+date = Date.parse("27/01/2012")
+puts date.to_s
+puts date.friday?
\ No newline at end of file
diff --git a/lang/er/regex.rb b/lang/er/regex.rb
old mode 100644
new mode 100755
diff --git a/lang/estrutura_controle/begin_end.rb b/lang/estrutura_controle/begin_end.rb
old mode 100644
new mode 100755
diff --git a/lang/estrutura_controle/case.rb b/lang/estrutura_controle/case.rb
old mode 100644
new mode 100755
diff --git a/lang/estrutura_controle/for.rb b/lang/estrutura_controle/for.rb
old mode 100644
new mode 100755
diff --git a/lang/estrutura_controle/if.rb b/lang/estrutura_controle/if.rb
old mode 100644
new mode 100755
diff --git a/lang/estrutura_controle/unless.rb b/lang/estrutura_controle/unless.rb
old mode 100644
new mode 100755
diff --git a/lang/estrutura_controle/until.rb b/lang/estrutura_controle/until.rb
old mode 100644
new mode 100755
diff --git a/lang/estrutura_controle/while.rb b/lang/estrutura_controle/while.rb
old mode 100644
new mode 100755
diff --git a/lang/estrutura_dados/array/definicao.rb b/lang/estrutura_dados/array/definicao.rb
old mode 100644
new mode 100755
diff --git a/lang/estrutura_dados/array/methods.rb b/lang/estrutura_dados/array/methods.rb
old mode 100644
new mode 100755
diff --git a/lang/estrutura_dados/hash/definicao.rb b/lang/estrutura_dados/hash/definicao.rb
old mode 100644
new mode 100755
diff --git a/lang/estrutura_dados/hash/methods.rb b/lang/estrutura_dados/hash/methods.rb
old mode 100644
new mode 100755
diff --git a/lang/estrutura_dados/hash/try_convert.rb b/lang/estrutura_dados/hash/try_convert.rb
old mode 100644
new mode 100755
diff --git a/lang/estrutura_dados/introducao.rb b/lang/estrutura_dados/introducao.rb
old mode 100644
new mode 100755
diff --git a/lang/estrutura_dados/set.rb b/lang/estrutura_dados/set.rb
old mode 100644
new mode 100755
diff --git a/lang/fiber.rb b/lang/fiber.rb
old mode 100644
new mode 100755
diff --git a/lang/file.rb b/lang/file.rb
old mode 100644
new mode 100755
diff --git a/lang/include_file.rb b/lang/include_file.rb
old mode 100644
new mode 100755
diff --git a/lang/inferencia_tipo.rb b/lang/inferencia_tipo.rb
old mode 100644
new mode 100755
diff --git a/lang/inheritance.rb b/lang/inheritance.rb
new file mode 100755
index 0000000..03196f4
--- /dev/null
+++ b/lang/inheritance.rb
@@ -0,0 +1,21 @@
+class Person
+	attr_accessor :name, :age
+	def initialize(name,age)
+		@name = name
+		@age = age
+	end
+end
+
+class Professor < Person
+end
+
+class Aluno < Person
+end
+
+pro = Professor.new("Leandro",32)
+alu = Aluno.new("Pedro",20)
+
+puts "Professor #{pro.name}, Idade: #{pro.age}"
+puts "Aluno #{alu.name}, Idade: #{alu.age}"
+
+# ver o super
\ No newline at end of file
diff --git a/lang/interpolacao_expressoes.rb b/lang/interpolacao_expressoes.rb
new file mode 100755
index 0000000..e69de29
diff --git a/lang/introducao.rb b/lang/introducao.rb
old mode 100644
new mode 100755
diff --git a/lang/json.rb b/lang/json.rb
old mode 100644
new mode 100755
diff --git a/lang/method_lockup.rb b/lang/method_lockup.rb
old mode 100644
new mode 100755
diff --git a/lang/methods/arg_obrigatorios.rb b/lang/methods/arg_obrigatorios.rb
old mode 100644
new mode 100755
diff --git a/lang/methods/arg_opcionais.rb b/lang/methods/arg_opcionais.rb
old mode 100644
new mode 100755
diff --git a/lang/methods/arg_valor_padrao.rb b/lang/methods/arg_valor_padrao.rb
old mode 100644
new mode 100755
diff --git a/lang/methods/blocos_parametros.rb b/lang/methods/blocos_parametros.rb
old mode 100644
new mode 100755
diff --git a/lang/methods/create.rb b/lang/methods/create.rb
new file mode 100755
index 0000000..a0ed60d
--- /dev/null
+++ b/lang/methods/create.rb
@@ -0,0 +1,11 @@
+def saysomething()
+	puts "Hello"
+end
+saysomething
+
+
+def saysomething
+	puts "Hello"
+end
+saysomething
+
diff --git a/lang/methods/definicao.rb b/lang/methods/definicao.rb
old mode 100644
new mode 100755
diff --git a/lang/methods/metodos_destrutivos.rb b/lang/methods/metodos_destrutivos.rb
old mode 100644
new mode 100755
diff --git a/lang/methods/metodos_predicados.rb b/lang/methods/metodos_predicados.rb
old mode 100644
new mode 100755
diff --git a/lang/methods/parameters.rb b/lang/methods/parameters.rb
old mode 100644
new mode 100755
diff --git a/lang/module.rb b/lang/module.rb
old mode 100644
new mode 100755
diff --git a/lang/multilingualization.rb b/lang/multilingualization.rb
old mode 100644
new mode 100755
diff --git a/lang/object.rb b/lang/object.rb
new file mode 100755
index 0000000..76623cc
--- /dev/null
+++ b/lang/object.rb
@@ -0,0 +1,22 @@
+class Leandro
+	def fala
+		"estou falando..."
+	end
+end
+pes = Leandro::new
+p pes.fala
+
+#tudo é objeto
+#p 10.class
+#p "leandro".class
+#p true.class
+
+
+#tap executa um bloco, passando um objeto como parâmetro
+#langs = [].tap do |a|
+#    a << "Ruby"
+#    a << "Python"
+#    a << "PHP"
+#end
+#puts langs
+
diff --git a/lang/operadores.rb b/lang/operadores.rb
old mode 100644
new mode 100755
diff --git a/lang/standard_library/date.rb b/lang/standard_library/date.rb
old mode 100644
new mode 100755
diff --git a/lang/threads.rb b/lang/threads.rb
old mode 100644
new mode 100755
diff --git a/lang/tipagem_dinamica.rb b/lang/tipagem_dinamica.rb
old mode 100644
new mode 100755
diff --git a/lang/tipagem_forte.rb b/lang/tipagem_forte.rb
old mode 100644
new mode 100755
diff --git a/lang/variables/class.rb b/lang/variables/class.rb
new file mode 100755
index 0000000..746472f
--- /dev/null
+++ b/lang/variables/class.rb
@@ -0,0 +1,32 @@
+class Car
+	@@wheel = 4
+
+	def wheel=(num)
+		@@wheel = num
+	end
+
+	p defined? @@wheel
+end
+
+class Fiat < Car
+	def wheel
+		@@wheel
+	end
+end
+
+class Ford < Car
+	def wheel
+		@@wheel
+	end	
+end
+
+fiat = Fiat.new
+ford = Ford.new
+
+puts fiat.wheel
+puts ford.wheel
+
+
+fiat.wheel = 5
+puts fiat.wheel
+puts ford.wheel
\ No newline at end of file
diff --git a/lang/variables/convencoes.rb b/lang/variables/convencoes.rb
old mode 100644
new mode 100755
diff --git a/lang/variables/global.rb b/lang/variables/global.rb
old mode 100644
new mode 100755
diff --git a/lang/variables/instance.rb b/lang/variables/instance.rb
new file mode 100755
index 0000000..e8bb20d
--- /dev/null
+++ b/lang/variables/instance.rb
@@ -0,0 +1,28 @@
+#Variaveis de instancia no receiver padrao
+class Person
+
+  def initialize(name)
+    @name = name
+    self.class.count = 4
+  end
+  
+  def self.count=(num)
+    @count = num
+  end
+  
+  def self.count
+    @count
+  end
+
+  def name
+    @name
+  end
+  
+end
+
+Person.count = 3
+pe = Person.new "Leandro"
+## Na instancia da Class
+p  pe.class.count
+## Na instancia do Objeto
+p pe.name
diff --git a/lang/variables/intro.rb b/lang/variables/intro.rb
new file mode 100755
index 0000000..850584a
--- /dev/null
+++ b/lang/variables/intro.rb
@@ -0,0 +1,5 @@
+#Variaveis são referencias a objetos
+#a = "leandro"
+#b = a
+#puts a.class
+#puts "Id de A: #{a.object_id} e id de B: #{b.object_id}"
diff --git a/lang/variables/local.rb b/lang/variables/local.rb
old mode 100644
new mode 100755
diff --git a/lang/variables/pseudo.rb b/lang/variables/pseudo.rb
old mode 100644
new mode 100755
diff --git a/metaprogramming/01_self_receiver.rb b/metaprogramming/01_self_receiver.rb
old mode 100644
new mode 100755
diff --git a/metaprogramming/02_singleton_class.rb b/metaprogramming/02_singleton_class.rb
old mode 100644
new mode 100755
diff --git a/metaprogramming/03_variavel_instancia_class.rb b/metaprogramming/03_variavel_instancia_class.rb
old mode 100644
new mode 100755
diff --git a/metaprogramming/04_classes_dinamicas.rb b/metaprogramming/04_classes_dinamicas.rb
old mode 100644
new mode 100755