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Rubyで複数の配列を比較して重複の値を取り出したり、排除したりする方法

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概要

今回はRuby複数の配列を比較して重複する値を取り除いたり、重複する値のみを抽出したりする方法を調べたのでメモとして残しておきます。

やり方

重複した値を抽出

a = [1, 2, 3, 4]
b = [3, 4, 5, 6]

a & b
# => [3, 4]

重複した値を取り除く

a = [1, 2, 3, 4]
b = [3, 4, 5, 6]

a - b
# => [1, 2, 5, 6]
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