Finding the difference between strings in Ruby

Question

I need to take two strings, compare them, and print the difference between them.

So say I have:

teamOne = \"Billy, Frankie, Stevie, John\"
teamTwo = \"Bi         


        

Answer 1

You need to sort first to ensure you are not subtracting a bigger string from a smaller one:

def compare(*params)
   params.sort! {|x,y| y <=> x}
   diff = params[0].split(', ') - params[1].split(', ')
   if diff === []
      true
   else
      diff
   end 
end

puts compare(a, b)