如何将键值映射转换为int的切片

Question

i'm trying to convert key-value map to slice of 2 value, for example :

slices := make(map[int64]int64)
slices[int64(521)] = int64(4)
slices[int64(528)] = int64(8)
// how do i convert that to become
// [[521, 4], [528, 8]]

i'm thinking about each all those key-value then create slice for that, but is there any simple code to do that ?

Answer 1

package main

import "fmt"

func main() {
    //create a map
    m := map[int64]int64{512: 8, 513: 9, 234: 9, 392: 0}

    //create a slice to hold required values
    s := make([][]int64, 0)

    //range over map `m` to append to slice `s`
    for k, v := range m {

        // append each element, with a new slice []int64{k, v}
        s = append(s, []int64{k, v})
    }

    fmt.Println(s)
}