Sometimes we'll want to sort a collection by something other than its natural order. For example, suppose we wanted to sort strings by their length instead of alphabetically. Here's an example of custom sorts in Go

package mainimport (    "fmt"    "sort")type ByLength []stringfunc (s ByLength) Len() int {    return len(s)}func (s ByLength) Swap(i, j int) {    s[i], s[j] = s[j], s[i]}func (s ByLength) Less(i, j int) bool {    return len(s[i]) < len(s[j])}func main() {    fruits := []string{
   "peach", "banana", "kiwi"}    sort.Sort(ByLength(fruits))    fmt.Println(fruits)}

[kiwi peach banana]

总结 :

　　1 : ...