### int升序
```go
package main
import (
"github.com/liyue201/gostl/algorithm/sort"
"github.com/liyue201/gostl/ds/slice"
"fmt"
"math/rand"
)
func main() {
a := make([]int, 0)
for i := 0; i < 10; i++ {
a = append(a, rand.Int()%20)
}
sort.Sort(slice.IntSlice(a).Begin(), slice.IntSlice(a).End())
fmt.Printf("%v\n", a)
}
```
```
[0 1 8 9 10 11 11 16 17 18]
```
### int降序
```go
package main
import (
"github.com/liyue201/gostl/algorithm/sort"
"github.com/liyue201/gostl/ds/slice"
"fmt"
"github.com/liyue201/gostl/utils/comparator"
"math/rand"
)
func main() {
a := make([]int, 0)
for i := 0; i < 10; i++ {
a = append(a, rand.Int()%20)
}
sort.Sort(slice.IntSlice(a).Begin(), slice.IntSlice(a).End(), comparator.Reverse(comparator.IntComparator))
fmt.Printf("%v\n", a)
}
```
```
[18 17 16 11 11 10 9 8 1 0]
```
### string升序
```go
package main
import (
"fmt"
"github.com/liyue201/gostl/algorithm/sort"
"github.com/liyue201/gostl/ds/slice"
"math/rand"
"strconv"
)
func main() {
a := make([]string, 0)
for i := 0; i < 10; i++ {
a = append(a, "aa"+strconv.Itoa(rand.Int()%20))
}
sort.Sort(slice.StringSlice(a).Begin(), slice.StringSlice(a).End())
fmt.Printf("%v\n", a)
}
```
```
[aa0 aa1 aa10 aa11 aa11 aa16 aa17 aa18 aa8 aa9]
```
### 奇偶分开再升序排序，偶数放左边，基数放右边
```go
package main
import (
"fmt"
"github.com/liyue201/gostl/algorithm/sort"
"github.com/liyue201/gostl/ds/slice"
"math/rand"
)
func main() {
a := make([]int, 0)
for i := 0; i < 10; i++ {
a = append(a, rand.Int()%20)
}
sort.Sort(slice.IntSlice(a).Begin(), slice.IntSlice(a).End(), func(a, b interface{}) int {
va := a.(int)
vb := b.(int)
if va&1 < vb&1 {
return -1
}
if va&1 > vb&1 {
return 1
}
if va < vb {
return -1
}
return 1
})
fmt.Printf("%v\n", a)
}
```
```
[0 8 10 16 18 1 9 11 11 17]
```
### 结构体排序
底层使用了反射，对性能要求高的场景不建议使用
```go
package main
import (
"fmt"
"github.com/liyue201/gostl/algorithm/sort"
"github.com/liyue201/gostl/ds/slice"
"reflect"
)
type User struct {
age int
name string
}
func main() {
a := make([]*User, 0)
a = append(a, &User{age: 2, name: "zzz"})
a = append(a, &User{age: 5, name: "nnn"})
a = append(a, &User{age: 2, name: "aaa"})
sw := slice.NewSliceWrapper(a, reflect.TypeOf(&User{}))
// 按age排序，再按name排序
sort.Sort(sw.Begin(), sw.End(), func(a, b interface{}) int {
ua := a.(*User)
ub := b.(*User)
if ua.age < ub.age {
return -1
}
if ua.age > ub.age {
return 1
}
if ua.name < ub.name {
return -1
}
if ua.name > ub.name {
return 1
}
return 0
})
for i := range a {
fmt.Printf("%+v\n", a[i])
}
}
```
```
&{age:2 name:aaa}
&{age:2 name:zzz}
&{age:5 name:nnn}
```
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