golang custom sort
type Person struct {
Name string
Age int
}
// ByAge implements sort.Interface based on the Age field.
type ByAge []Person
func (a ByAge) Len() int { return len(a) }
func (a ByAge) Less(i, j int) bool { return a[i].Age < a[j].Age }
func (a ByAge) Swap(i, j int) { a[i], a[j] = a[j], a[i] }
func main() {
family := []Person{
{"Alice", 23},
{"Eve", 2},
{"Bob", 25},
}
sort.Sort(ByAge(family))
fmt.Println(family) // [{Eve 2} {Alice 23} {Bob 25}]
}