NEED HELP QUICK!!!

Modify the WordCount program so it outputs the wordcount for each distinct word in each file. So the output of this DocWordCount

stepladder [879]

Answer and Explanation:

package PackageDemo;

import java.io.IOException;

import org.apache.hadoop.conf.Configuration;

import org.apache.hadoop.fs.Path;

import org.apache.hadoop.io.IntWritable;

import org.apache.hadoop.io.LongWritable;

import org.apache.hadoop.io.Text;

import org.apache.hadoop.mapreduce.Job;

import org.apache.hadoop.mapreduce.Mapper;

import org.apache.hadoop.mapreduce.Reducer;

import org.apache.hadoop.mapreduce.lib.input.FileInputFormat;

import org.apache.hadoop.mapreduce.lib.output.FileOutputFormat;

import org.apache.hadoop.util.GenericOptionsParser;

public class WordCount {

public static void main(String [] args) throws Exception

{

Configuration c=new Configuration();

String[] files=new GenericOptionsParser(c,args).getRemainingArgs();

Path input=new Path(files[0]);

Path output=new Path(files[1]);

Job j=new Job(c,"wordcount");

j.setJarByClass(WordCount.class);

j.setMapperClass(MapForWordCount.class);

j.setReducerClass(ReduceForWordCount.class);

j.setOutputKeyClass(Text.class);

j.setOutputValueClass(IntWritable.class);

FileInputFormat.addInputPath(j, input);

FileOutputFormat.setOutputPath(j, output);

System.exit(j.waitForCompletion(true)?0:1);

}

public static class MapForWordCount extends Mapper<LongWritable, Text, Text, IntWritable>{

public void map(LongWritable key, Text value, Context con) throws IOException, InterruptedException

{

String line = value.toString();

String[] words=line.split(",");

for(String word: words )

{

Text outputKey = new Text(word.toUpperCase().trim());

IntWritable outputValue = new IntWritable(1);

con.write(outputKey, outputValue);

}

public static class ReduceForWordCount extends Reducer<Text, IntWritable, Text, IntWritable>

{

public void reduce(Text word, Iterable<IntWritable> values, Context con) throws IOException, InterruptedException

{

int sum = 0;

for(IntWritable value : values)

{

sum += value.get();

}

con.write(word, new IntWritable(sum));

}

8 0

3 years ago

This operator represents the logical AND.

sdas [7]

Answer:

C. &&

Explanation:

Of the options provided:

A) ++ : increment operator. For example : ++1 = 2

B) || : Logical OR operator. A || B is true if any one of A or B is true.

C) && : Logical AND operator. A && B is true if both A and B are true.

A B A && B

False False False

False True False

True False False

True True True

D) @ : Ampersand character (commonly used in email addresses) e.g, [email protected]

3 0

3 years ago

A. Define a computer with its proper meaning.

Rashid [163]

Answer:

Computer

Explanation:

a programmable electronic device designed to accept data, perform prescribed mathematical and logical operations at high speed, and display the results of these operations.

7 0

3 years ago

Read 2 more answers

1. Type a statement that reads a user-entered integer into variable numUsers. Assume scnr already exists.

ASHA 777 [7]

Answer:

Question 1:

int numUsers = scnr.nextInt();

Question 2:

public class OutputExample {

public static void main (String [] args) {

int numCars = 99;

Scannerscnr=new Scanner(System.in);

numCars=scnr.nextInt();

System.out.println("There are "+numCars+" cars");

return;

}

Question 3:

import java.util.Scanner;

public class Errors {

public static void main(String [] args) {

int userNum = 5;

System.out.println ("Predictions are hard. ");

System.out.print("Especially ");

System.out.print("about the future.");

System.out.println("Num is: "+userNum);

return;

}

Explanation:

In Question 1, the statement int numUsers = scnr.nextInt(); reads a new integer value from the keyboard and assigns it to the variable numUsers.

In question 2, Concatenation is used to format the print output.

In question 3, care is taken to fix each of the syntax errors (missing double quotes, semi-colon, concatenation)

3 0

3 years ago

including how it can be stored and what types of operations we can perform. For example, we can write a program that squares num

ASHA 777 [7]

Answer:

The solution code is written in Python:

def square(num):
if type(num).__name__ == 'int':
sq_num = num * num
return sq_num
else:
return "Invalid input"
print(square(5))
print(square("Test"))

Explanation:

To ensure only certain type of operation can be applied on a input value, we can check the data type of the input value. For example, we define a function and name it as square which take one input number, num (Line 1).

Before the num can be squared, it goes through a validation mechanism in by setting an if condition (Line 2) to check if the data type of the input number is an integer, int. If so, the num will only be squared otherwise it return an error message (Line 6).

We can test our function by passing value of 5 and "Test" string. We will get program output:

25

Invalid input

6 0

3 years ago