August 2015
Intermediate to advanced
312 pages
7h 28m
Japanese
Content preview from 初めてのSpark
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110
6 章 Spark の高度なプログラミング
6-12
ー
Java
//
コールサインのテーブルを読み込む
// contactCounts RDD
中の各コールサインの
//
国をルックアップする。
final Broadcast<String[]> signPrefixes = sc.broadcast(loadCallSignTable());
JavaPairRDD<String, Integer> countryContactCounts = contactCounts.mapToPair(
new PairFunction<Tuple2<String, Integer>, String, Integer> (){
public Tuple2<String, Integer> call(Tuple2<String, Integer> callSignCount) {
String sign = callSignCount._1();
String country = lookupCountry(sign, callSignInfo.value());
return new Tuple2(country, callSignCount._2());
}}).reduceByKey(new SumInts());
countryContactCounts.saveAsTextFile(outputDir + "/countries.txt"); ...
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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.