/usr/lib/ruby/vendor_ruby/active_support/core_ext/hash/reverse_merge.rb is in ruby-activesupport-2.3 2.3.14-7.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 | module ActiveSupport #:nodoc:
module CoreExtensions #:nodoc:
module Hash #:nodoc:
# Allows for reverse merging two hashes where the keys in the calling hash take precedence over those
# in the <tt>other_hash</tt>. This is particularly useful for initializing an option hash with default values:
#
# def setup(options = {})
# options.reverse_merge! :size => 25, :velocity => 10
# end
#
# Using <tt>merge</tt>, the above example would look as follows:
#
# def setup(options = {})
# { :size => 25, :velocity => 10 }.merge(options)
# end
#
# The default <tt>:size</tt> and <tt>:velocity</tt> are only set if the +options+ hash passed in doesn't already
# have the respective key.
module ReverseMerge
# Performs the opposite of <tt>merge</tt>, with the keys and values from the first hash taking precedence over the second.
def reverse_merge(other_hash)
other_hash.merge(self)
end
# Performs the opposite of <tt>merge</tt>, with the keys and values from the first hash taking precedence over the second.
# Modifies the receiver in place.
def reverse_merge!(other_hash)
replace(reverse_merge(other_hash))
end
alias_method :reverse_update, :reverse_merge!
end
end
end
end
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