Class: NumberInverter

Inherits:
Object
  • Object
show all
Defined in:
lib/number_inverter.rb,
lib/number_inverter/version.rb

Overview

Number Inverter class

Constant Summary collapse

VERSION = 
'0.1.0'

Class Method Summary collapse

Class Method Details

.invert(number) ⇒ Object

Invert a number

Example:

>> NumberInverter.invert(123)
=> 321

Arguments:

number: (Integer or Float)



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# 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) ⇒ Object 



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# File 'lib/number_inverter.rb', line 28

def self.sgn(n)
  n <=> 0
end