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}
# File 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
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