January 2019
Beginner to intermediate
154 pages
4h 31m
English
Content preview from Apache Spark Quick Start Guide
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map()
This applies a given function to each element of an RDD and returns a new RDD with the same number of elements. For example, in the following code, numbers from 1 to 10 are multiplied by the number 2:
#Pythonspark.sparkContext.parallelize(range(1,11)).map(lambda x : x * 2).collect()
The following code performs the same operation in Scala:
//Scalaspark.sparkContext.parallelize(1 to 10).map(_ * 2).collect()
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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.