Sha256: 611483d3fb85124d663f158c2732ee5a7e18307342ee50074efd8a39f4173477
Contents?: true
Size: 345 Bytes
Versions: 36
Compression:
Stored size: 345 Bytes
Contents
# coding: utf-8
class Integer
def kaprekar?
return true if self == 1
sdigits = (self ** 2).digits
(1..sdigits.size-1).each do |first|
a = sdigits.first(first).join.to_i
b = sdigits.last(sdigits.size-first).join.to_i
next if [a,b].any?{|n| n.zero?}
return true if (a + b) == self
end
false
end
end
Version data entries
36 entries across 36 versions & 1 rubygems