Idiomatic object creation in ruby

Question

In ruby, I often find myself writing the following:

class Foo
  def initialize(bar, baz)
    @bar = bar
    @baz = baz
  end

  << more stuff >>
         


        

Answer 1

I sometimes do

@bar, @baz = bar, baz

Still boilerplate, but it only takes up one line.

I guess you could also do

["bar", "baz"].each do |variable_name|
  instance_variable_set(:"@#{variable_name}", eval(variable_name))
end

(I'm sure there's a less dangerous way to do that, mind you)

https://bugs.ruby-lang.org/issues/5825 is a proposal to make the boilerplate less verbose.