Github user rxin commented on a diff in the pull request:
https://github.com/apache/spark/pull/172#discussion_r10718405
--- Diff: core/src/main/scala/org/apache/spark/util/collection/BitSet.scala
---
@@ -88,6 +88,53 @@ class BitSet(numBits: Int) extends Serializable {
newBS
}
+
+ /**
+ * Compute the symmetric difference by performing bit-wise XOR of the
two sets returning the
+ * result.
+ */
+ def ^(other: BitSet): BitSet = {
+ val newBS = new BitSet(math.max(capacity, other.capacity))
+ assert(newBS.numWords >= numWords)
+ assert(newBS.numWords >= other.numWords)
+ val smaller = math.min(numWords, other.numWords)
+ var ind = 0
+ while( ind < smaller ) {
--- End diff --
Spark style is
```scala
while (ind < smaller) {
```
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