-module ActiveSupport #:nodoc:
- module CoreExtensions #:nodoc:
- module Hash #:nodoc:
- module Diff
- # Returns a hash that represents the difference between two hashes.
- #
- # Examples:
- #
- # {1 => 2}.diff(1 => 2) # => {}
- # {1 => 2}.diff(1 => 3) # => {1 => 2}
- # {}.diff(1 => 2) # => {1 => 2}
- # {1 => 2, 3 => 4}.diff(1 => 2) # => {3 => 4}
- def diff(h2)
- self.dup.delete_if { |k, v| h2[k] == v }.merge(h2.dup.delete_if { |k, v| self.has_key?(k) })
- end
- end
- end
- end
-end