freakyzoidberg commented on code in PR #29:
URL: https://github.com/apache/datasketches-go/pull/29#discussion_r2001721213
##########
cpc/pair_table.go:
##########
@@ -237,3 +237,63 @@ func mergePairs(arrA []int, startA, lengthA int, arrB
[]int, startB, lengthB int
c++
}
}
+
+// Copy creates and returns a deep copy of the pairTable.
+func (p *pairTable) Copy() *pairTable {
+ // Create a new pairTable using the same lgSizeInts and validBits.
+ newPT, err := NewPairTable(p.lgSizeInts, p.validBits)
+ if err != nil {
+ // This should not happen if p is valid.
+ panic(err)
+ }
+ // Copy the number of pairs.
+ newPT.numPairs = p.numPairs
+ // Deep copy the slots array.
+ newPT.slotsArr = make([]int, len(p.slotsArr))
+ copy(newPT.slotsArr, p.slotsArr)
+ return newPT
+}
+
+// UnwrapItems extracts the valid items from the pair table using the
unwrapping logic.
+// It returns a slice containing exactly numPairs items, or nil if numPairs <
1.
+func (p *pairTable) UnwrapItems(numPairs int) []int {
Review Comment:
unwrap
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