class JMESPath::Nodes::ContainsFunction

def call(args)
  if args.count == 2
    haystack = args[0]
    needle = Util.as_json(args[1])
    if haystack.respond_to?(:to_str)
      haystack.to_str.include?(needle)
    elsif haystack.respond_to?(:to_ary)
      haystack.to_ary.any? { |e| Util.as_json(e) == needle }
    else
      return maybe_raise Errors::InvalidTypeError, 'contains expects 2nd arg to be a list'
    end
  else
    return maybe_raise Errors::InvalidArityError, 'function contains() expects 2 arguments'
  end
end