Github user tarekauel commented on a diff in the pull request: https://github.com/apache/spark/pull/7208#discussion_r34006564 --- Diff: unsafe/src/main/java/org/apache/spark/unsafe/types/UTF8String.java --- @@ -165,6 +165,38 @@ public UTF8String toLowerCase() { return UTF8String.fromString(toString().toLowerCase()); } + public UTF8String initCap(final byte[] byteArr) { + String isoString = null; + try { + isoString = new String(byteArr, "US-ASCII"); --- End diff -- @davies @rxin Can one of you decide if this is the way to go. I would still say it's an **UTF8**String and it should support unicode. As I mentioned earlier java offers an API to do this: http://grepcode.com/file/repository.grepcode.com/java/root/jdk/openjdk/8u40-b25/java/lang/Character.java#Character.toTitleCase%28char%29
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