move container sort to struct method

connector/docker.go

@@ -3,7 +3,6 @@ package connector
 
 import (
 	"fmt"
-	"sort"
 	"strings"
 	"sync"
 
@@ -161,7 +160,7 @@ func (cm *Docker) All() (containers container.Containers) {
 	for _, c := range cm.containers {
 		containers = append(containers, c)
 	}
-	sort.Sort(containers)
+	containers.Sort()
 	containers.Filter()
 	cm.lock.Unlock()
 	return containers

connector/mock.go

@@ -4,7 +4,6 @@ package connector
 
 import (
 	"math/rand"
-	"sort"
 	"strings"
 	"time"
 
@@ -72,7 +71,7 @@ func (cs *Mock) Get(id string) (*container.Container, bool) {
 
 // Return array of all containers, sorted by field
 func (cs *Mock) All() container.Containers {
-	sort.Sort(cs.containers)
+	cs.containers.Sort()
 	cs.containers.Filter()
 	return cs.containers
 }

connector/runc.go

@@ -5,7 +5,6 @@ import (
 	"io/ioutil"
 	"os"
 	"path/filepath"
-	"sort"
 	"sync"
 	"time"
 
@@ -217,7 +216,7 @@ func (cm *Runc) All() (containers container.Containers) {
 	for _, c := range cm.containers {
 		containers = append(containers, c)
 	}
-	sort.Sort(containers)
+	containers.Sort()
 	containers.Filter()
 	cm.lock.Unlock()
 	return containers

container/sort.go

@@ -3,6 +3,7 @@ package container
 import (
 	"fmt"
 	"regexp"
+	"sort"
 
 	"github.com/bcicen/ctop/config"
 )
@@ -89,6 +90,7 @@ func SortFields() (fields []string) {
 
 type Containers []*Container
 
+func (a Containers) Sort()         { sort.Sort(a) }
 func (a Containers) Len() int      { return len(a) }
 func (a Containers) Swap(i, j int) { a[i], a[j] = a[j], a[i] }
 func (a Containers) Less(i, j int) bool {