September 2018
Intermediate to advanced
398 pages
9h 43m
English
Content preview from Scala Programming Projects
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Exploring the Spark API with the Scala console
If you are not already familiar with Spark, it can be a bit intimidating to write Spark jobs straight away. To make it easier, we are first going to explore the API using a Scala console. Start a new Scala console (Ctrl + Shift + D in IntelliJ), and type the following code:
import org.apache.spark.sql.SparkSessionval spark = SparkSession.builder().master("local[*]").getOrCreate()import spark.implicits._
This will initialize a new Spark session and bring some handy implicit in scope. The master "local[*]" URL means that we will use all of the cores available on the localhost when running jobs.
The Spark session is available to accept new jobs. Let's use it to create Dataset containing a single ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
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.