回答編集履歴
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test
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@@ -1,19 +1,8 @@
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Rubyでは＋演算子で配列の足し算ができますので以下のようでどうでしょうか？
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2
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-
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4
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-
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5
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```lang-ruby
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6
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-
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7
3
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arr = ['a', 'b']
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8
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-
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4
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arr + ['c']
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-
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# => ["a", "b", "c"]
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6
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13
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-
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-
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7
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arr
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-
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8
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# => ['a', 'b']
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18
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-
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19
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-
```
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