self

• self在当前的initialize中直指当前的实例对象

  class Foo
  def initialize(x)
    self.c x
  end
  
  def c(x)
    puts "c的参数是#{x}"
  end
  end
  f = Foo.new(1)

• 带给我的感觉 self在很大程度上类似.都是指定当前的实例.给我的感觉就是

  self == @
  !self.eql?(@)

  类似于coffee js的

  this && @

  例如:

  ```ruby class Foo attr_accessor :name def initialize(x) @name = "wo" end end

class Foo attr_accessor :name def initialize(x) self.name = "wo" end end

f = Foo.new(3) puts f.name

再比如
```ruby
class A
  @num = 8
  def show
    puts @num
  end
end

class B < A
  def initialize
    @num = 3
  end
end

b = B.new
b.show