📅  最后修改于: 2022-03-11 15:04:46.910000             🧑  作者: Mango
# Element exists in array
object_exists = arr.any? { |elem| elem == desired_value }
# Element with property exists in array
object_exists = arr.any? { |obj| obj.prop == desired_value }
# Type exists in array
object_exists = arr.any?(Integer)
# Element matching regex exists in array
object_exists = arr.any?(/d/)