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README
go-rampart
Go port of the Haskell Rampart library by Taylor Fausak.
This package provides types and functions for defining intervals and determining how they relate to each other. This can be useful to determine if an event happened during a certain time frame, or if two time frames overlap (and if so, how exactly they overlap).
Install
go get github.com/francesconi/go-rampart
Examples
Ordered types
Any type that supports the operators < <= >= >.
a := rampart.NewInterval(2, 3)
b := rampart.NewInterval(3, 7)
rel := a.Relate(b)
// rel: RelationMeets
Any other type
NewIntervalFunc accepts any type as long as a comparison function is provided. The comparison function should return values as follows:
cmp(t1, t2) < 0 if t1 < t2
cmp(t1, t2) > 0 if t1 > t2
cmp(t1, t2) == 0 if t1 == t2
time.Time
func compareTimes(t1, t2 time.Time) int {
return int(t1.Sub(t2))
}
a := rampart.NewIntervalFunc(
time.Date(2022, time.April, 1, 0, 0, 0, 0, time.UTC),
time.Date(2022, time.April, 8, 0, 0, 0, 0, time.UTC),
compareTimes,
)
b := rampart.NewIntervalFunc(
time.Date(2022, time.April, 6, 0, 0, 0, 0, time.UTC),
time.Date(2022, time.April, 15, 0, 0, 0, 0, time.UTC),
compareTimes,
)
rel := a.Relate(b)
// rel: RelationOverlaps
[][interval relations]