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

One way would be to petition "Matz" to add this functionality to the Ruby specification.

if input == ("quit","exit","close","cancel") then
  #quit the program
end

But the case-when statement already lets you do exactly that:

case input when "quit","exit","close","cancel" then 
  #quit the program
end

When written on one line like that, it acts and almost looks like an if statement. Is the bottom example a good temporary substitution for the top example? You be the judge.