Github user srowen commented on a diff in the pull request:
https://github.com/apache/spark/pull/16024#discussion_r89795879
--- Diff: docs/programming-guide.md ---
@@ -1378,29 +1378,36 @@ res2: Long = 10
While this code used the built-in support for accumulators of type Long,
programmers can also
create their own types by subclassing
[AccumulatorV2](api/scala/index.html#org.apache.spark.util.AccumulatorV2).
-The AccumulatorV2 abstract class has several methods which need to
override:
-`reset` for resetting the accumulator to zero, and `add` for add anothor
value into the accumulator, `merge` for merging another same-type accumulator
into this one. Other methods need to override can refer to scala API document.
For example, supposing we had a `MyVector` class
-representing mathematical vectors, we could write:
+The AccumulatorV2 abstract class has several methods which one has to
override:
+`reset` for resetting the accumulator to zero, `add` for adding another
value into the accumulator,
+and `merge` for merging another same-type accumulator into this one. Other
methods that must be overridden
+are contained in the [API
documentation](api/scala/index.html#org.apache.spark.util.AccumulatorV2).
+For example, supposing we had a `MathVector` class representing
mathematical vectors, we could write:
--- End diff --
Yes let's use MyVector call consistently then.
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