rubyのhash
# これはエラー
mes = []
mes['hoge'] = 'hogehoge'
mes['huga'] = 'hugahuga'
# これはOK
mes = {'hoge' => 'hogehoge', 'huga' => 'hugahuga'}
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# これはエラー
mes = []
mes['hoge'] = 'hogehoge'
mes['huga'] = 'hugahuga'
# これはOK
mes = {'hoge' => 'hogehoge', 'huga' => 'hugahuga'}
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