// Copyright 2011 The Go Authors. All rights reserved.// Use of this source code is governed by a BSD-style// license that can be found in the LICENSE file.package sort_testimport ( "fmt" "sort")type Person struct { Name string Age int}func (p Person) String() string { return fmt.Sprintf("%s: %d", p.Name, p.Age)}// ByAge implements sort.Interface for []Person based on// the Age field.type ByAge []Personfunc (a ByAge) Len() int { return len(a) }func (a ByAge) Swap(i, j int) { a[i], a[j] = a[j], a[i] }func (a ByAge) Less(i, j int) bool { return a[i].Age < a[j].Age }func Example() { people := []Person{ {"Bob", 31}, {"John", 42}, {"Michael", 17}, {"Jenny", 26}, } fmt.Println(people) sort.Sort(ByAge(people)) fmt.Println(people) // Output: // [Bob: 31 John: 42 Michael: 17 Jenny: 26] // [Michael: 17 Jenny: 26 Bob: 31 John: 42]}
// Copyright 2011 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package sort_test
import (
"fmt"
"sort"
)
type Person struct {
Name string
Age int
}
func (p Person) String() string {
return fmt.Sprintf("%s: %d", p.Name, p.Age)
}
// ByAge implements sort.Interface for []Person based on
// the Age field.
type ByAge []Person
func (a ByAge) Len() int { return len(a) }
func (a ByAge) Swap(i, j int) { a[i], a[j] = a[j], a[i] }
func (a ByAge) Less(i, j int) bool { return a[i].Age < a[j].Age }
func Example() {
people := []Person{
{"Bob", 31},
{"John", 42},
{"Michael", 17},
{"Jenny", 26},
}
fmt.Println(people)
sort.Sort(ByAge(people))
fmt.Println(people)
// Output:
// [Bob: 31 John: 42 Michael: 17 Jenny: 26]
// [Michael: 17 Jenny: 26 Bob: 31 John: 42]
}