class Integer

Public Instance Methods

factors() click to toggle source

returns all positive factors of an Integer

# File lib/pmeth.rb, line 7
def factors
(1..self).select { |n| (self % n).zero? } 
end
prime?() click to toggle source

returns true if self is a prime number, false otherwise

# File lib/pmeth.rb, line 12
def prime?
        Prime.prime?(self)
end