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デフォルトオブジェクトがProcであるHashはダンプできない

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データを集計してファイルに保存!をやろうとして詰まるやつ

h = Hash.new{[]}
Marshal.dump(h) # => TypeError: can't dump hash with default proc

JSONを噛ませて(Procを浄化して)対処している

h0 = JSON.parse( JSON.dump(h) )
Marshal.dump(h0) # => "\x04\b{\x00"

もうちょっと賢い方法はないものか

Marshal フォーマット

giiko_
お引越ししました -> @giiko
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