💎Ruby: Hashの値からキーを取得する2021/09/16に公開Rubytechkeyメソッドを使えば良い https://docs.ruby-lang.org/ja/latest/method/Hash/i/index.html hash = { key1: 'val1', key2: 'val2' } hash.key('val1') # => :key1 hash.key('val2') # => :key2 hash.key('val3') # => nil Discussion
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