Ruby Koan 151 raising exceptions

Question

I\'m going through the ruby koans, I\'m on 151 and I just hit a brick wall.

Here is the koan:

# You need to write the triangle method in the file \'trian         


        

Answer 1

After try to understand what I must to do with koan 151, I got it with the first posts, and get lot fun to check everyone solution :) ... here is the mine:

def triangle(a, b, c)
  array = [a, b, c].sort
  raise TriangleError if array.min <= 0 || array[0]+array[1] <= array[2]
  array.uniq!
  array.length == 1 ? :equilateral: array.length == 2 ? :isosceles : :scalene
end

Koan is a very interesting way to learn Ruby