method

diff

v2.0.3 - Show latest stable - 0 notes - Class: ActiveSupport::CoreExtensions::Hash::Diff

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What's this?

diff(h2) public

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}

Show source

# File activesupport/lib/active_support/core_ext/hash/diff.rb, line 13
        def diff(h2)
          self.dup.delete_if { |k, v| h2[k] == v }.merge(h2.dup.delete_if { |k, v| self.has_key?(k) })
        end

diff

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