ActiveSupport::CoreExtensions::Integer::EvenOdd

• activesupport/lib/active_support/core_ext/integer/even_odd.rb

For checking if a fixnum is even or odd.

  2.even?  # => true
  2.odd?   # => false
  1.even?  # => false
  1.odd?   # => true
  0.even?  # => true
  0.odd?   # => false
  -1.even? # => false
  -1.odd?  # => true

• even?
• multiple_of?
• odd?