Github user mengxr commented on a diff in the pull request:
https://github.com/apache/spark/pull/7360#discussion_r34605879
--- Diff:
mllib/src/main/scala/org/apache/spark/mllib/fpm/LocalPrefixSpan.scala ---
@@ -42,33 +42,36 @@ private[fpm] object LocalPrefixSpan extends Logging
with Serializable {
def run(
minCount: Long,
maxPatternLength: Int,
- prefix: Array[Int],
- projectedDatabase: Array[Array[Int]]): Array[(Array[Int], Long)] = {
- val frequentPrefixAndCounts = getFreqItemAndCounts(minCount,
projectedDatabase)
- val frequentPatternAndCounts = frequentPrefixAndCounts
- .map(x => (prefix ++ Array(x._1), x._2))
- val prefixProjectedDatabases = getPatternAndProjectedDatabase(
- prefix, frequentPrefixAndCounts.map(_._1), projectedDatabase)
+ prefix: List[Int],
+ database: Iterable[Array[Int]]): Iterator[(Array[Int], Long)] = {
--- End diff --
`database` should be an `Array[Array[Int]]`. We need multiple access to it.
The return type should be `Iterator[(List[Int], Long)]`.
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