1：二维数组按照第一列大小排序

import (
	"fmt"
	"sort"
)
func main() {
	interval := [][]int{
		{2,3},
		{2,2},
		{3,3},
		{1,3},
		{5,7},
		{2,2},
		{4,6},
	}
	sort.Slice(interval, func(i, j int) bool {
		return interval[i][0] < interval[j][0]//按照每行的第一个元素排序
	})
	fmt.Println(interval)
}

2：第一列相同时，按照第二列大小排序

func main() {
	interval := [][]int{
		{2,3},
		{2,2},
		{3,3},
		{1,3},
		{5,7},
		{2,2},
		{4,6},
	}
	sort.Slice(interval, func(i, j int) bool {
		if  interval[i][0] ==  interval[j][0] {
			return interval[i][1] < interval[j][1]
		}else {
			return interval[i][0] <  interval[j][0]
		}
	})
	fmt.Println(interval)
}

结构体字段排序：https://blog.csdn.net/weixin_37078439/article/details/89202527