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kyuden/gist:7300213

Created November 4, 2013 09:32
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【WZ】<保持しないKeyで参照を行った場合のエラー処理付きhash> ・予期しない入力が起こった場合のエラー文言をカスタマイズしたい場合 ・CLIアプリなどで多様
Raw
gistfile1.txt
hash = Hash.new do |hash, k|
raise( ArgumentError, "'#{k}' is not todo sub command" )
end
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