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popochess/Hashable 跟 Equatable

Last active September 5, 2018 14:29
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Hashable 跟 Equatable
之前一直搞不懂 Hashable 跟 Equatable ，剛剛終於懂了
因為 Hashable inherit Equatable，所以 Hashable 除了可以比較 == object 外， 還可以做 great than 跟 less than ， hash有 not duplicate的特性，所以也可以做用 duplicate，這樣的用意就可以延伸到做 sort
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