module SubOptParse::Util

# File lib/suboptparse/util.rb, line 11
def self.recursive_merge(obj1, obj2)
  if obj1.nil?
    obj2
  elsif obj2.nil?
    obj1
  elsif obj1.instance_of?(Hash) && obj2.instance_of?(Hash)
    obj2.each { |k, v| obj1[k] = recursive_merge(obj1[k], v) }
    obj1
  elsif obj1.instance_of?(Array) && obj2.instance_of?(Array)
    h = {}
    obj1.each { |v| h[v] = recursive_merge(h[v], v) }
    obj2.each { |v| h[v] = recursive_merge(h[v], v) }
    h.values
  else
    # Can't merge. Return object 2.
    obj2
  end
end