Sha256: dd20df12530e79d2da79df69d1d800e130d4955c169de33ee9d3adbd7caf6000
Contents?: true
Size: 327 Bytes
Versions: 11
Compression:
Stored size: 327 Bytes
Contents
class Integer
def factorial
return 1 if zero?
(1..self).reduce(:*)
end
def factorial?
divisors = self.divisors.sort
divisors.each_with_index do |d, i|
if divisors[i.succ] == d.succ
return true if d.factorial == self
else
return d.factorial == self
end
end
end
end
Version data entries
11 entries across 11 versions & 1 rubygems