March 2019
Beginner to intermediate
182 pages
4h 6m
English
Content preview from Hands-On Big Data Analytics with PySpark
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Actions on key/value pairs
In this section, we'll be looking at the actions on key/value pairs.
We will cover the following topics:
- Examining actions on key/value pairs
- Using collect()
- Examining the output for the key/value RDD
In the first section of this chapter, we covered transformations that are available on key/value pairs. We saw that they are a bit different compared to RDDs. Also, for actions, it is slightly different in terms of result but not in the method name.
Therefore, we'll be using collect() and we'll be examining the output of our action on these key/value pairs.
First, we will create our transactions array and RDD according to userId, as shown in the following example:
val keysWithValuesList = Array( UserTransaction("A", ...Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.