Github user HuJiayin commented on a diff in the pull request:
https://github.com/apache/spark/pull/7236#discussion_r34229711
--- Diff:
unsafe/src/main/java/org/apache/spark/unsafe/types/UTF8String.java ---
@@ -254,6 +254,70 @@ public boolean equals(final Object other) {
}
}
+ /**
+ * Levenshtein distance is a metric for measuring the distance of two
strings. The distance is
+ * defined by the minimum number of single-character edits (i.e.
insertions, deletions or
+ * substitutions) that are required to change one of the strings into
the other.
+ */
+ public int levenshteinDistance(UTF8String other) {
+ // Implementation adopted from
org.apache.common.lang3.StringUtils.getLevenshteinDistance
+
+ int n = numChars();
--- End diff --
If each string will not exceed 65535 characters, you can use unsigned short
maybe.
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