Project Euler Problem 4

euler004.rb

def palindrome?(integer)
  string = integer.to_s
  string == string.reverse
end

products = []

999.step(100, -1).to_a.each do |a|
  999.step(100, -1).to_a.each do |b|
    product = a*b
    products << a*b if palindrome?(product)
  end
end

products.max