Rotate Matrix Clockwise: https://leetcode.com/problems/rotate-image/

rotateMatrixClockwise.go

func rotate(matrix [][]int)  {
    reverse(matrix)
    swap(matrix) 
}


func reverse(matrix [][]int){ 
    for i , j := 0, len(matrix)-1; i < j; i, j = i+1, j-1{
        matrix[i], matrix[j] = matrix[j], matrix[i]
    }
}


func swap(matrix [][]int){
    for i := 0; i < len(matrix); i++ {
        for j := i; j < len(matrix); j++ {
			matrix[i][j], matrix[j][i] = matrix[j][i], matrix[i][j]
		}
	}
}