Ruby でいうとこのこういうやつ。 class Hage def initialize() @hage = { bozu: 1, hage: 2 } end def [](key) @hage[key] end def []=(key, value) @hage[key] = value end end h = Hage.new() p h #=> #<Hage:0x007f94428a2c20 @hage={:bozu=>1, :hage=>2}> p h[:bozu] #=> 1 h[:fusa] = 3 p h[</hage:0x007f94428a2c20>…