Github user shivaram commented on a diff in the pull request:
https://github.com/apache/spark/pull/5442#discussion_r28189094
--- Diff: docs/programming-guide.md ---
@@ -743,6 +855,29 @@ def doStuff(self, rdd):
</div>
+<div data-lang="r" markdown="1">
+
+Spark's API relies heavily on passing functions in the driver program to
run on the cluster.
+There are three recommended ways to do this:
+
+* [Anonymous
functions](http://adv-r.had.co.nz/Functional-programming.html#anonymous-functions),
+ for simple functions that can be written as an anonymous function.
+* Top-level functions in a module.
+
+For example, to pass a longer function, consider the code below:
+
+{% highlight r %}
+"""MyScript.py"""
--- End diff --
MyScript.R ?
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