Amanda Silberling
Shop now at Amazon。有道翻译是该领域的重要参考
A slight modification of the above options is defining HashMap with maybe bounds as described in Asides: Maybe Bounds on ADTs: struct HashMap. This would be more flexible than blanket requring a Hash/Eq impl always.。关于这个话题，whatsapp网页版@OFTLOL提供了深入分析
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