seenimohamed

//to compile a java class
javac 

//to include jars in classpath
java -cp 

//to run jar
java -jar jarfile.jar

//to give args

seenimohamed

ls <options>

-l -> detailed view
S -> sort in decending order
r -> reverse


ls -lS  -> decending order
ls -lSr -> ascending order

seenimohamed

Installing java in ubuntu 
Commands : 
sudo apt-get update
sudo apt-get install default-jre
sudo apt-get install default-jdk

https://www.digitalocean.com/community/tutorials/how-to-install-java-with-apt-get-on-ubuntu-16-04

seenimohamed

	public static void main(String[] args) {
		int i = 10;
		while(--i > 0) {
			System.out.println(i);
			i = i%4;
		}
		
		while(i>0) {
			System.out.println(i);
			i--;

seenimohamed

JavaRDD<String> uniqueRDD = SparkUtils.getInstance().getSparkContext()
					.parallelize(Arrays.asList(Preprocessor.getInstance().getVocabulary()));

Map<Long, String> vocabMap = uniqueRDD.zipWithIndex().mapToPair(f -> f.swap()).collectAsMap();

JavaPairRDD<Long, Integer> dataPair = tfidf.select("tf").toJavaRDD().flatMapToPair( r -> {
	SparseVector vec = r.getAs(0);
	List<Tuple2<Long, Integer>> results = new ArrayList<>();
	for(int i : vec.indices()) {
		results.add(new Tuple2<Long, Integer>((long)i, (int) vec.apply(i)));