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Contents
# frozen_string_literal: true
module Geocoder
module Util
#
# Recursive version of Hash#merge!
#
# Adds the contents of +h2+ to +h1+,
# merging entries in +h1+ with duplicate keys with those from +h2+.
#
# Compared with Hash#merge!, this method supports nested hashes.
# When both +h1+ and +h2+ contains an entry with the same key,
# it merges and returns the values from both hashes.
#
# h1 = {"a" => 100, "b" => 200, "c" => {"c1" => 12, "c2" => 14}}
# h2 = {"b" => 254, "c" => {"c1" => 16, "c3" => 94}}
# recursive_hash_merge(h1, h2) #=> {"a" => 100, "b" => 254, "c" => {"c1" => 16, "c2" => 14, "c3" => 94}}
#
# Simply using Hash#merge! would return
#
# h1.merge!(h2) #=> {"a" => 100, "b" = >254, "c" => {"c1" => 16, "c3" => 94}}
#
def self.recursive_hash_merge(h1, h2)
h1.merge!(h2) do |_key, oldval, newval|
oldval.class == h1.class ? self.recursive_hash_merge(oldval, newval) : newval
end
end
end
end
Version data entries
14 entries across 14 versions & 1 rubygems