Generic interval types and operations for Go.
go get github.com/mokeko/interval
- Int
type Int = interval.Int // wrapper type for int
// [1, 3]
i := interval.New(
interval.ClosedEp(Int(1)),
interval.ClosedEp(Int(3)),
)
fmt.Println(i.Contains(Int(2))) // true
// (3, +inf)
i2 := interval.New(
interval.OpenEp(Int(3)),
interval.UnboundedEp[Int](),
)
fmt.Println(i.Overlaps(i2)) // false- Time
type Time = interval.Time // wrapper type for time.Time
// [2020-01-01, 2020-01-04]
i := interval.New(
interval.ClosedEp(Time(time.Date(2020, 1, 1, 0, 0, 0, 0, time.UTC))),
interval.ClosedEp(Time(time.Date(2020, 1, 4, 0, 0, 0, 0, time.UTC))),
)
fmt.Println(i.Contains(Time(time.Date(2020, 1, 5, 0, 0, 0, 0, time.UTC)))) // false
// [2020-01-02, 2020-01-03]
i2 := interval.New(
interval.ClosedEp(Time(time.Date(2020, 1, 2, 0, 0, 0, 0, time.UTC))),
interval.ClosedEp(Time(time.Date(2020, 1, 3, 0, 0, 0, 0, time.UTC))),
)
fmt.Println(i.Overlaps(i2)) // true- Other types
// Need to implement Ordered interface.
type ver struct {
major int
minor int
}
func (v ver) Equal(v2 ver) bool {
return v == v2
}
func (v ver) LessThan(v2 ver) bool {
return v.major < v2.major || (v.major == v2.major && v.minor < v2.minor)
}// [1.0, 2.0)
i := interval.New(
interval.ClosedEp(ver{1, 0}),
interval.OpenEp(ver{2, 0}),
)
fmt.Println(i.Contains(ver{2, 0})) // false
// [1.5, 2.5)
i2 := interval.New(
interval.ClosedEp(ver{1, 5}),
interval.OpenEp(ver{2, 5}),
)
fmt.Println(i.Overlaps(i2)) // true