Beware that inline statements in ruby uses Proc

if_with_assign.rb

class MyClass
  class << self
    def with_inline_statement
      result = nil
      response = result.first if(result = item).exists?
      response
    end
    def with_multiline_statement
      if (result = item).exists?
        response = result.first
      end
      response
    end

    def item
      ClassWithExists.new
    end
  end
end

class ClassWithExists
  def exists?
    true
  end
  def first
    'youhou'
  end
end

puts 'WITH MULTILINE'

p MyClass.with_multiline_statement

puts 'WITH INLINE'

p MyClass.with_inline_statement