Github user HyukjinKwon commented on a diff in the pull request: https://github.com/apache/spark/pull/21482#discussion_r194610745 --- Diff: R/pkg/NAMESPACE --- @@ -281,6 +281,8 @@ exportMethods("%<=>%", "initcap", "input_file_name", "instr", + "isInf", + "isinf", --- End diff -- Ah, I got it now. I believe we should match it to one side though. I roughly remember we keep functions this_naming_style in functions[.py|.R|.scala], e.g.([SPARK-10621](https://issues.apache.org/jira/browse/SPARK-10621)). Shall we stick to `isinf` then?
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