Changing a friend's triangle implementation

triangle.rb

# your way fixed

def triangle(a,b,c)
  equal = false
  [[a,b], [a,c], [b,c]].each do |first, second|
    if first == second
      equal ? (return :equilateral) : (equal = true)
    end
  end
  
  if equal
    return :isoceles
  else
    return :scalene
  end
end

triangle(1,2,3)

# OO (and clearer) way

class Triangle
  def initialize(a,b,c)
    @a = a
    @b = b
    @c = c
  end
  
  def type
    case [@a, @b, @c].uniq.length
    when 1 then :equilateral
    when 2 then :isosceles
    when 3 then :scalene
    end
  end
end

puts Triangle.new(3,2,3).type