Some examples of proper Ruby Style

examples.rb

class SomeClass
  SOME_CONSTANT = 'upper case name'
 
  def initialize(attributes)
    @some_attribute = attributes[:some_attribute]
    @another_attribute = attributes[:another_attribute]
    @user_factory = attributes[:user_factory]
  end
 
  def method_with_arguments(argument_one, argument_two)
    this_is_a_really_long_line_that_should_be_broken_up_over_multiple_lines_and.
      every_line_but_the_first_is_indented
  end
 
  def method_with_multiline_block
    some_method_before_block(should_be_followed_by_a_newline)
 
    items.each do |item|
      do_something_with_item
    end
 
    some_method_after_block(should_follow_after_newline)
  end
 
  def method_with_single_line_block
    items.map { |item| item.some_attribute }
  end
 
  def method_that_returns_an_array
    [item_one, item_two]
  end
 
  def method_that_returns_a_hash
    { key: 'value' }
  end
 
  def method_with_large_hash
    {
      one: 'value',
      two: => 'value'
    }
  end
 
  def invoke_method_with_arguments_on_multiple_lines
    some_method(
      i_am_a_long_variable_name_that_i_will_never_fit_on_one_line_with_others,
      two,
      three
    )
 
    # Bad:
    some_method(one,
                two)
  end
 
  def method_that_uses_infix_operators
    left + middle - right
  end
 
  def method_without_arguments
    if complex_condition?
      positive_branch
    else
      negative_branch
    end
 
    rest_of_body
  end
 
  def method_that_uses_factory
    user = @user_factory.new
    user.ensure_authenticated!
  end
 
  def self.class_method
    method_body
  end
 
  private
 
  def complex_condition?
    part_one? && part_two?
  end
end