--- self[arg, ...]
--- call(arg ... )
--- call(arg ... ) { ... }

    ᥽åɥ֥ȤƤ᥽åɤưޤ
    ֥åϤΤޤޥ᥽åɤϤޤ

    self[] ηθƤӽФ̾Υ᥽åɸƤӽФ˸ܤ
    դ뤿Ѱդ줿ΤǡArray#[]Τ褦
    ¾ [] ᥽åɤȤΰ̣ŪʴϢϤޤ

    ᥽åɥ֥ȤƤ硢Υ᥽åɤϡե
    ٥ 4 Ǽ¹Ԥޤ
    (ե٥˴ؤ뤽¾ξܺ٤򻲾)

