python
メソッドではなく attributes を表示するという扱いではあるらしい (詳細不明)
Python dir() - Python Standard Library
The dir() method tries to return a list of valid attributes of the object.
>>> dir("a")
['__add__', '__class__', '__contains__', '__delattr__', '__dir__', '__doc__', '__eq__', '__format__', '__ge__', '__getattribute__', '__getitem__', '__getnewargs__', '__gt__', '__hash__', '__init__', '__init_subclass__', '__iter__', '__le__', '__len__', '__lt__', '__mod__', '__mul__', '__ne__', '__new__', '__reduce__', '__reduce_ex__', '__repr__', '__rmod__', '__rmul__', '__setattr__', '__sizeof__', '__str__', '__subclasshook__', 'capitalize', 'casefold', 'center', 'count', 'encode', 'endswith', 'expandtabs', 'find', 'format', 'format_map', 'index', 'isalnum', 'isalpha', 'isascii', 'isdecimal', 'isdigit', 'isidentifier', 'islower', 'isnumeric', 'isprintable', 'isspace', 'istitle', 'isupper', 'join', 'ljust', 'lower', 'lstrip', 'maketrans', 'partition', 'replace', 'rfind', 'rindex', 'rjust', 'rpartition', 'rsplit', 'rstrip', 'split', 'splitlines', 'startswith', 'strip', 'swapcase', 'title', 'translate', 'upper', 'zfill']
>>> "a".title()
'A'
ruby
[1] pry(main)> "a".methods
=> [:include?,
:%,
:*,
:+,
:unicode_normalize,
:shellsplit,
:to_c,
:unicode_normalize!,
:unicode_normalized?,
:shellescape,
:count,
:partition,
:unpack,
:next,
:encode,
:encode!,
:casecmp,
:insert,
:bytesize,
:match,
:succ!,
:next!,
:upto,
:index,
:rindex,
:replace,
:clear,
:+@,
:-@,
:getbyte,
:chr,
:<=>,
:<<,
:byteslice,
:scrub,
:setbyte,
:==,
:===,
:scrub!,
:=~,
:upcase,
:[],
:[]=,
:dump,
:upcase!,
:downcase,
:capitalize,
:swapcase,
:hex,
:empty?,
:eql?,
:swapcase!,
:bytes,
:oct,
:downcase!,
:capitalize!,
:reverse!,
:chars,
:codepoints,
:split,
:lines,
:concat,
:end_with?,
:crypt,
:reverse,
:start_with?,
:center,
:freeze,
:inspect,
:intern,
:chomp,
:sub,
:gsub,
:prepend,
:rjust,
:ord,
:lstrip,
:rstrip,
:scan,
:length,
:size,
:chomp!,
:succ,
:sub!,
:chop,
:chop!,
:ljust,
:strip!,
:lstrip!,
:tr_s,
:delete,
:strip,
:tr!,
:to_str,
:to_sym,
:gsub!,
:each_line,
:squeeze,
:each_char,
:to_s,
:to_i,
:tr,
:slice!,
:each_byte,
:encoding,
:each_codepoint,
:tr_s!,
:delete!,
:rstrip!,
:rpartition,
:to_f,
:b,
:sum,
:slice,
:squeeze!,
:to_r,
:force_encoding,
:valid_encoding?,
:ascii_only?,
:hash,
:to_json,
:to_json_raw,
:to_json_raw_object,
:<,
:>,
:<=,
:>=,
:between?,
:pry,
:__binding__,
:pretty_print,
:pretty_print_cycle,
:pretty_print_instance_variables,
:pretty_print_inspect,
:tap,
:public_send,
:instance_variables,
:instance_variable_set,
:instance_variable_defined?,
:remove_instance_variable,
:private_methods,
:kind_of?,
:is_a?,
:instance_variable_get,
:method,
:public_method,
:singleton_method,
:instance_of?,
:extend,
:define_singleton_method,
:to_enum,
:enum_for,
:pretty_inspect,
:!~,
:respond_to?,
:object_id,
:display,
:send,
:nil?,
:class,
:singleton_class,
:clone,
:dup,
:itself,
:taint,
:tainted?,
:untaint,
:untrust,
:trust,
:untrusted?,
:methods,
:protected_methods,
:frozen?,
:public_methods,
:singleton_methods,
:!,
:!=,
:__send__,
:equal?,
:instance_eval,
:instance_exec,
:__id__]
Original by Github issue
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