instance method `diff`

Ruby on Rails 3.0.20

Since v3.0.20 Last seen in v4.0.13

Available in: v3.0.20 v3.1.12 v3.2.22.5 v4.0.13

Compare with:

diff(h2)

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}

Parameters

h2 req

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

Defined in activesupport/lib/active_support/core_ext/hash/diff.rb line 10 · View on GitHub · Improve this page · Find usages on GitHub

Defined in Hash

Signature

Parameters