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

I don't know in what context you're using this in, but if it fits into a switch statement you can do:

a = 1
case a
when 1, 2
  puts a
end

Some other benefits is that when uses the case equality === operator, so if you want, you can override that method for different behavior. Another, is that you can also use ranges with it too if that meets your use case:

when 1..5, 7, 10