自定义类型实现sort接口

utils/date/date.go

@@ -397,3 +397,10 @@ func SinceDate(t Date) time.Duration {
 func UntilDate(t Date) time.Duration {
 	return t.Sub(Today())
 }
+
+// sort
+type ByDate []Date
+
+func (a ByDate) Len() int           { return len(a) }
+func (a ByDate) Swap(i, j int)      { a[i], a[j] = a[j], a[i] }
+func (a ByDate) Less(i, j int) bool { return a[i].Before(a[j]) }

utils/date/datetime.go

@@ -437,3 +437,10 @@ func dateStrFormat(input string) string {
 	}
 	return input
 }
+
+// sort
+type ByDatetime []Datetime
+
+func (a ByDatetime) Len() int           { return len(a) }
+func (a ByDatetime) Swap(i, j int)      { a[i], a[j] = a[j], a[i] }
+func (a ByDatetime) Less(i, j int) bool { return a[i].Before(a[j]) }

utils/date/time.go

@@ -397,3 +397,10 @@ func SinceTime(t Time) time.Duration {
 func UntilTime(t Time) time.Duration {
 	return t.Sub(CurrentTime())
 }
+
+// sort
+type ByTime []Time
+
+func (a ByTime) Len() int           { return len(a) }
+func (a ByTime) Swap(i, j int)      { a[i], a[j] = a[j], a[i] }
+func (a ByTime) Less(i, j int) bool { return a[i].Before(a[j]) }

utils/long.go

@@ -81,3 +81,10 @@ func (t *Long) Scan(value interface{}) error {
 func (t Long) IsZero() bool {
 	return t == 0
 }
+
+// sort
+type ByLong []Long
+
+func (a ByLong) Len() int           { return len(a) }
+func (a ByLong) Swap(i, j int)      { a[i], a[j] = a[j], a[i] }
+func (a ByLong) Less(i, j int) bool { return a[i] < a[j] }