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copied!<p>you can use <code>clone</code> method as well !!</p> <pre><code>def copy(bild: Array[Array[Int]]): Unit = { val copy = bild.clone } </code></pre> <p><strong>Update :</strong></p> <p>since, Array[Int] is still mutable references, cloning will still not solve the problem.. as mentioned by Andriy Plokhotnyuk in his comment..</p> <p><em>Problem :</em> </p> <pre><code>val og = Array(Array(1, 2, 3), Array(4,5,6)) //> og : Array[Array[Int]] = Array(Array(1, 2, 3), Array(4, 5, 6)) val copy = og.clone //> copy : Array[Array[Int]] = Array(Array(1, 2, 3), Array(4, 5, 6)) copy(0)(0) = 7 og //> res2: Array[Array[Int]] = Array(Array(7, 2, 3), Array(4, 5, 6)) copy //> res3: Array[Array[Int]] = Array(Array(7, 2, 3), Array(4, 5, 6)) </code></pre> <p>Here any update to <code>copy</code> will reflect to <code>og</code> also..</p> <p><em>Sol :</em></p> <p>So I primarily need to clone Array[Int] as well.. hence..</p> <pre><code>val og = Array(Array(1, 2, 3), Array(4,5,6)) //> og : Array[Array[Int]] = Array(Array(1, 2, 3), Array(4, 5, 6)) val copy = og.map(_.clone) //> copy : Array[Array[Int]] = Array(Array(1, 2, 3), Array(4, 5, 6)) copy(0)(0) = 7 og //> res2: Array[Array[Int]] = Array(Array(1, 2, 3), Array(4, 5, 6)) copy //> res3: Array[Array[Int]] = Array(Array(7, 2, 3), Array(4, 5, 6)) </code></pre> <p>Hence.. Refactoring copy method in the question to..</p> <pre><code>def copy(bild: Array[Array[Int]]): Unit = { val copy = bild.map(_.clone) } </code></pre>

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