import (
"fmt"
"sort"
)
type MapSorter []Item
type Item struct {
Key string
Val int64
}
func NewMapSorter(m map[string]int64) MapSorter {
ms := make(MapSorter, 0, len(m))
for k, v := range m {
ms = append(ms, Item{k, v})
}
return ms
}
func (ms MapSorter) Len() int {
return len(ms)
}
func (ms MapSorter) Less(i, j int) bool {
return ms[i].Val < ms[j].Val // 按值排序
//return ms[i].Key < ms[j].Key // 按键排序
}
func (ms MapSorter) Swap(i, j int) {
ms[i], ms[j] = ms[j], ms[i]
}
func main(){
m := map[string]int64 {
"e": 10,
"a": 2,
"d": 15,
"c": 8,
"f": 1,
"b": 12,
}
ms := NewMapSorter(m)
sort.Sort(ms)
for _, item := range ms {
fmt.Printf("%s:%d\n", item.Key, item.Val)
}
}
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