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v3.0.9 - Show latest stable - 0 notes - Class: Hash

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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 10
  def diff(h2)
    dup.delete_if { |k, v| h2[k] == v }.merge!(h2.dup.delete_if { |k, v| has_key?(k) })
  end

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