class NumberInverter

Number Inverter class

Constants

VERSION

Public Class Methods

invert(number) click to toggle source

Invert a number

Example:

>> NumberInverter.invert(123)
=> 321

Arguments:

number: (Integer or Float)

# File lib/number_inverter.rb, line 14
def self.invert(number)
  if number.is_a? Fixnum
    sgn = self.sgn(number)
    number_str = number.abs.to_s
    number_str.reverse!
    sgn * number_str.to_i
  elsif number.is_a? Float
    sgn = self.sgn(number)
    number_str = number.abs.to_s
    number_str.reverse!
    sgn * number_str.to_f
  end
end

sgn(n) click to toggle source

# File lib/number_inverter.rb, line 28
def self.sgn(n)
  n <=> 0
end