Test whether a variable equals either one of two values

Question

I want to test whether a equals 1 or 2

I could do

a == 1 || a == 2

but this requires repeating

Answer 1

First put this somewhere:

class Either < Array
  def ==(other)
    self.include? other
  end
end

def either(*these)
  Either[*these]
end

Then, then:

if (either 1, 2) == a
  puts "(i'm just having fun)"
end