cipri7329

/**
 *
Find longest sequence of zeros in binary representation of an integer.
*/

public class BinaryLongestZeroSequence {
    /**
     * worst-case time complexity is O(log(N));
     * number of bits = log(N) ==> worst case is O(N)
     * @param N

cipri7329

import time

__author__ = 'user'

import base64
import json
from kafka import KafkaConsumer

from kafka import TopicPartition

cipri7329

import time
from kafka import KafkaProducer
import json
import base64

KAFKA_TOPIC = "scraped-data"
KAFKA_HOST = "localhost:9092"

producer = KafkaProducer(bootstrap_servers=KAFKA_HOST, value_serializer=lambda v: json.dumps(v).encode('utf-8'))

cipri7329

zeppelin 0.6.1 with cdh 5.7.0 on ubuntu 14.04 lts

Instalation

resources

• http://blog.cloudera.com/blog/2015/07/how-to-install-apache-zeppelin-on-cdh/
• https://ypg-data.github.io/post/2016/02/running-zeppelin-on-cdh/

required packages

sudo apt-get install node nodejs npm

cipri7329

load from file

val moviesDump = sc.textFile("hdfs://localhost:8020/user/datalake/movies/ml-latest/movies.csv")

case class Movie(movieId : Integer, title : String, genres : List[String])
 
val movies = moviesDump.map(s => s.split(",")).filter(s => s(0)!="movieId")
    .map( 
        s => Movie(s(0).toInt,
            s.slice(1, s.size-1).mkString(""),

cipri7329

GET _cluster/state?pretty

GET _search
{
    "query": {
        "match_all": {}
 }

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wikiagent.sources = spool
wikiagent.channels = memChannel
wikiagent.sinks = HDFS 

# source config
wikiagent.sources.spool.type = spooldir
wikiagent.sources.spool.channels = memChannel

wikiagent.sources.spool.spoolDir = /home/ubuntu/datalake/processed

cipri7329

//In the cell below, determine what is the most frequent CHARACTER in the README, and how many times was it used?
//spark and scala

var charCounts2 = readme.flatMap(line => line.toList).
    filter( a => !a.equals("\n") && !a.equals(" ") && !a.equals("") ).
    filter( _ != ' ').
    map(character => (character, 1)).
    reduceByKey((a,b) => a + b).
    reduce((a, b) => if (a._2 > b._2) a else b)
    //take(55).

cipri7329

//example from https://courses.bigdatauniversity.com/courses/course-v1:BigDataUniversity+BD0212EN+2016/ exercises

val input1 = sc.textFile("data/trips/*")

val header1 = input1.first // to skip the header row

val trips = input1.
 filter(_ != header1).
 map(_.split(",")).
 map(utils.Trip.parse(_))

cipri7329

  code sample

Scala Code Snippets

Scalar product

given two lists of doubles a scalar product is the sum of the products between each pair of corresponding elements