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Feature #5: Auto Rotate in Mobile Devices

Sumit Rawal answered on September 3, 2023 Popularity 1/10 Helpfulness 1/10

answer Feature #5: Auto Rotate in Mobile Devices

Feature #5: Auto Rotate in Mobile Devices

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object Solution {
    def autoRotate(matrix: Array[Array[Int]]): Unit = {
        var left = 0
        var right = matrix.length - 1
        while ( {
            left < right
        }) { // `right - left` moves our square in by 1 each outer iteration
            // the index is used to rotate the coordinates
            for (i <- 0 until right - left) {
                val top = left
                val bottom = right
                val topLeft = matrix(top)(left + i)
                // move bottomLeft to topLeft
                matrix(top)(left + i) = matrix(bottom - i)(left)
                // move bottomRight to bottomLeft
                matrix(bottom - i)(left) = matrix(bottom)(right - i)
                // move topRight to bottomRight
                matrix(bottom)(right - i) = matrix(top + i)(right)
                // set saved to topRight
                matrix(top + i)(right) = topLeft
            }
            left += 1
            right -= 1
        }

    }

    def main(args: Array[String]): Unit = { // Driver code
        val matrix = Array(Array(5, 1, 9, 11), Array(2, 4, 8, 10), Array(13, 3, 6, 7), Array(15, 14, 12, 16))
        autoRotate(matrix)
        println(printMatrix(matrix))
    }

    def printMatrix(matrix: Array[Array[Int]]): String = {
        var str = "["
        for (i <- 0 until matrix.length) {
            str += "["
            for (j <- 0 until matrix(i).length) {
                str += String.valueOf(matrix(i)(j))
                if (j + 1 < matrix(i).length) str += " "
            }
            if (i == matrix.length - 1) str += "]"
            else str += "]\n"
            if (i + 1 < matrix.length) str += " "
        }
        str += "]"
        str
    }
}

Popularity 1/10 Helpfulness 1/10 Language scala

Source: Grepper

Tags: auto mobile-devices scala

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Contributed on Sep 03 2023

Sumit Rawal

0 Answers Avg Quality 2/10

Feature #5: Auto Rotate in Mobile Devices

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