Web Search and Sense-Making
Assignment 3
Task: Clean Wikipedia
Introduction:
In this assignment, we will perform initial cleaning of the Wikipedia data.
Requirements:
100GB free disk space in your machine.
Instructions:
1. Write a PreProc.scala file to preprocess the file. Basically, we will extract all content in
<page…</page and output each per line into an output file. Please keep the two
beginning and closing tags <page and </page in your output file.
It Is not required, but you are welcome to use the following code template:
import scala.io.Source
import java.io.PrintWriter
import java.io.File
import scala.collection.mutable.StringBuilder
object PreProc {
def main(args: Array[String]) {
val inputfile = “your_wikidump_file”
val outputfile = new PrintWriter(new File(“your_output_file”))
var a_output_line = new StringBuilder
// write your code to extract content in every <page …. </page
// write each of that into one line in your output file
for (inputline <- Source.fromFile(inputfile).getLines) {
…….
}
outputfile.close
}
2. Please see sample input and output files on Piazza
3. Print the total number of pages in English Wikipedia to the screen
COSC 589 - Web Search and Sense-Making
What to Submit:
- Your code
- Screen capture of the page count results that you print to the screen
- Screen capture of the beginning of your output (by using ‘head -n20’ to show the first 20 lines)
What NOT to Submit:
- Your input or output files
Where to submit:
- Canvas
