Use tap with ObjC & Java ruby inter-op.

gistfile1.rb

  def email_text_field
    return @email_text_field if @email_text_field
 
    @email_text_field = UITextField.alloc.initWithFrame([[0, 0], [225, 40]])
    @email_text_field.center = CGPointMake(self.view.frame.size.width / 2, (self.view.frame.size.height / 2) - 60)
    @email_text_field.placeholder = "tobias@funke.com"
    @email_text_field.borderStyle = UITextBorderStyleRoundedRect
 
    @email_text_field
  end
  
  #Smaller variable names...
  def email_text_field
    return @email_text_field if @email_text_field
    
    @email_text_field = UITextField.alloc.initWithFrame([[0, 0], [225, 40]])
    @email_text_field.tap do |tf|
      tf.center = CGPointMake(self.view.frame.size.width / 2, (self.view.frame.size.height / 2) - 60)
      tf.placeholder = "tobias@funke.com"
      tf.borderStyle = UITextBorderStyleRoundedRect
    end
    
    @email_text_field
  end
  
  # Memoize all in one.
  def email_text_field
    return @email_text_field ||= UITextField.alloc.initWithFrame([[0, 0], [225, 40]]).tap do |tf|
      tf.center = CGPointMake(self.view.frame.size.width / 2, (self.view.frame.size.height / 2) - 60)
      tf.placeholder = "tobias@funke.com"
      tf.borderStyle = UITextBorderStyleRoundedRect
    end
  end