lamber-ken edited a comment on issue #1245: [MINOR] Replace Collection.size > 0 with Collection.isEmpty() URL: https://github.com/apache/incubator-hudi/pull/1245#issuecomment-576026737 hi @vinothchandar @smarthi thanks for review this pr. Here are my thoughts: 1, It's right that most collections use `size()==0` inside their `isEmpty()` method, but that doesn't mean that they all do, for example `java.util.concurrent.ConcurrentSkipListSet`. The [ConcurrentSkipListSet documentation](https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/ConcurrentSkipListSet.html) says: ``` Beware that, unlike in most collections, the size method is not a constant-time operation. ``` It means that `.size()` can be O(1) or O(N), depending on the data structure; `.isEmpty()` is never O(N). <br> 2, IDE always prompts me to make changes.  <br> 3, In hudi project, some codes use `isEmpty()`, some codes `size() > 0`  <br> 4, `isEmpty()` is a clearer definition of what it is we actually care about, IMO, it's more understandable.
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