compareTo method
Compares this object to another object.
Returns a value like a Comparator when comparing this
to other
.
That is, it returns a negative integer if this
is ordered before other
,
a positive integer if this
is ordered after other
,
and zero if this
and other
are ordered together.
The other
argument must be a value that is comparable to this object.
Implementation
@override
int compareTo(Interval other) {
// For now, only allow compares to other intervals.
// Equality, less and greater tests.
if (this < other) return -1;
return (this > other) ? 1 : 0;
}