[Ruby]配列をマージ・結合する - Qiita>> a = ["ruby", "paython", "perl"] => ["ruby", "paython", "perl"] >> b = ["paython", "perl", "php"] => ["paython", "perl", "php"] >> a + b => ["ruby", "paython", "perl", "paython", "perl", "php"] >> a.concat(b) => ["ruby", "paython", "perl", "paython", "perl", "php"]
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