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# File 'lib/ebooks/core_ext.rb', line 2
def deep_merge(hash)
target = dup
hash.keys.each do |key|
if hash[key].is_a?(Hash) && self[key].is_a?(Hash)
target[key] = target[key].deep_merge(hash[key])
end
target[key] = hash[key]
end
target
end
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