To get methods used for arrays in ruby, do
puts myarray.methodsinspect to_s to_a to_ary frozen? == eql? hash [] []= at fetch first last concat << push pop shift unshift insert each each_index reverse_each length size empty? find_index index rindex join reverse reverse! rotate rotate! sort sort! sort_by! collect collect! map map! select select! keep_if values_at delete delete_at delete_if reject reject! zip transpose replace clear fill include? <=> slice slice! assoc rassoc + * - & | uniq uniq! compact compact! flatten flatten! count shuffle! shuffle sample cycle permutation combination repeated_permutation repeated_combination product take take_while drop drop_while pack entries sort_by grep find detect find_all flat_map collect_concat inject reduce partition group_by all? any? one? none? min max minmax min_by max_by minmax_by member? each_with_index each_entry each_slice each_cons each_with_object chunk slice_before nil? === =~ !~ class singleton_class clone dup initialize_dup initialize_clone taint tainted? untaint untrust untrusted? trust freeze methods singleton_methods protected_methods private_methods public_methods instance_variables instance_variable_get instance_variable_set instance_variable_defined? instance_of? kind_of? is_a? tap send public_send respond_to? respond_to_missing? extend display method public_method define_singleton_method object_id to_enum enum_for equal? ! != instance_eval instance_exec __send__ __id__
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