golang 二维切片

初始化：
res := make([][length]int, length)，
例如：
res := make([][2]int, 10)
fmt.Println(res)
输出：
[[0 0] [0 0] [0 0] [0 0] [0 0] [0 0] [0 0] [0 0] [0 0] [0 0]]
 
或者
a := [][]float64{
        {1, 2, 3, 4},
        {12, 21, 3, 14},
        {1, 1, 2, 3},
        {2, 3, 1, 6},
        {2, 2, 3, 3},
        {1, 1, 1, 1}}

排序：
//根据二维切片的第一个属性从大到小排序，第二个属性默认是递增顺序
people := [][]int{{9, 0}, {7, 0}, {1, 9}, {3, 0}, {2, 7}, {5, 3}, {6, 0}, {3, 4}, {6, 2}, {5, 2}}
less := func(i, j int) bool {
    if people[i][0] == people[j][0] {
        return people[i][1] < people[j][1]
    }
    return people[i][0] > people[j][0]
}
//调用排序函数
sort.Slice(people, less)
fmt.Println(people)
//输出
//[[9 0] [7 0] [6 0] [6 2] [5 2] [5 3] [3 0] [3 4] [2 7] [1 9]]