Problem 36

The decimal number, 585 = 1001001001₂ (binary), is palindromic in both bases.

Find the sum of all numbers, less than one million, which are palindromic in base 10 and base 2.

(Please note that the palindromic number, in either base, may not include leading zeros.)

def isCycle(n):
    if n%10 == 0:
        return False
    tempN = n
    num=list()
    while n > 0:
        num.insert(0,n%2)
        n /= 2
    for i in range(0,int(len(num)/2)):
        if num[i] != num[len(num)-i-1] :
            return False

    value = http://www.mamicode.com/list()>

class String
    def isCycle?
        self == self.reverse
    end
end

puts (1..1000000).select{|i| i.to_s.isCycle? && i.to_s(2).isCycle? }.reduce(:+)