sampler

type Source interface {
	// Uint64 returns a random number in [0, MaxUint64] and advances the
	// generator's state.
	Uint64() uint64
}

type Uniform interface {
	Initialize(sampleRange uint64)
	// Sample returns length numbers in the range [0,sampleRange). If there
	// aren't enough numbers in the range, false is returned. If length is
	// negative the implementation may panic.
	Sample(length int) ([]uint64, bool)

	Next() (uint64, bool)
	Reset()
}

type Weighted interface {
	Initialize(weights []uint64) error
	Sample(sampleValue uint64) (int, bool)
}

type WeightedWithoutReplacement interface {
	Initialize(weights []uint64) error
	Sample(count int) ([]int, bool)
}