proost commented on code in PR #94:
URL: https://github.com/apache/datasketches-go/pull/94#discussion_r2682486695
##########
sampling/reservoir_items_sketch.go:
##########
@@ -111,3 +114,94 @@ func (s *ReservoirItemsSketch[T]) Reset() {
s.n = 0
s.data = s.data[:0]
}
+
+// Preamble constants for serialization
+const (
+ preambleIntsShort = 1 // empty sketch
+ preambleIntsLong = 3 // non-empty sketch
+ serVer = 2 // serialization version
+)
+
+// ToByteArray serializes the sketch to a byte array using the provided SerDe.
+func (s *ReservoirItemsSketch[T]) ToByteArray(serde ItemsSerDe[T]) ([]byte,
error) {
Review Comment:
Consistent names are good. `ToByteArray` with
`NewReservoirItemsSketchFromByteArray` or `ToSlice` with
`NewReservoirItemsSketchFromSlice`
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