[Beginner] Programming Challenge: 3

[M_the_C]

Here's my entry.

Python:

import re

f = open('bhaarat.text').read()

#  Search for sequences containing one or more numbers,
#  then a full stop, then white-space, then words beginning
#  with H and S.
sh = re.compile(r'\d+.\s(H\D+|S\D+)')
list = sh.findall(f)

out = open('out.text', 'w')

a = len(list)
while a > 0:
  list.insert(a-1,'. ')
  list.insert(a-1,str(a),)
  a = a - 1

b = "".join(list)
out.write(b)
out.close

bh = open('bhaarat.text', 'a')
bh.write('23. English\n')
bh.close()

[iofthemourning]

then you are deleting off the numbers.

awk '$2 ~ /^(H|S)/{print d++". "$2 }END{ print "23. English" >> "bhaarat.text"}' bhaarat.text > out.text

That was the point.

"Output can be flexible, however, it cannot include the original numbers and some sort of whitespace should separate the words (newlines if you are going for extra credit). Extra credit for correctly numbered lines."

I am, admittedly, new to linux/unix command line though, so I'm sure there is a better way to do it.

edit: In fact, I'm gonna have to learn about awk now. That was cool.

[LaRoza]

do we have to create a new text file for the output in the program or is that done manually

also do you mean save it as bhaarat.text or bhaarat.txt?

bhaarat.text is the input file, and I don't understand the first question. You don't have a choice in the matter I think, you will have to create it.

[thirddeep]

Well, my awk is not THAT ubber, so I used a simpler method:

cat bhaarat.text | awk '{print $2}' | egrep "^H|^S" | while read line; do echo $count $line; ((count++)); done | sed 's/Hindi/0 Hindi/' > out.text
echo "23. English" >> bhaarat.txt

Going to read those python examples now ...

Thd.

[greps5]

In Java:

// Beginner Challenge 3 in Java
// by greps5 8/9/08

import java.io.*;

public class Challenge3 {

    public static void main(String[] args) {

        BufferedReader fileIn;
        BufferedWriter fileOut;
        int count = 1;
        String txtRecord;
        
        // initialize the file input and output streams
        try {
            fileIn = new BufferedReader(new FileReader("bhaarat.text"));
            fileOut = new BufferedWriter(new FileWriter("out.text"));
        }
        catch (FileNotFoundException ex) {
            System.out.println("Error: file 'bhaarat.text' not found.");
            System.out.println("Please make sure that the filename is " +
                    "spelled correctly and that the file resides in the " +
                    "same location as the Challenge3.class file.");
            return;
        }
        catch (IOException ex) {
            System.out.println("Error: unable to initialize file I/O");
            return;
        } // end try-catch
        
        try {
            txtRecord = fileIn.readLine();
            
            System.out.println("File I/O in progress...");
            
            while (txtRecord != null) {
                // trim record number from txtRecord
                if (txtRecord.charAt(1) == '.') {
                    txtRecord = txtRecord.substring(1);
                }
                else {
                    txtRecord = txtRecord.substring(2);
                } // end if
                
                // check first letter of the language and write to file
                if (txtRecord.charAt(2) == 'H' || txtRecord.charAt(2) == 'S') {
                    txtRecord = "" + count + txtRecord;
                    fileOut.write(txtRecord);
                    fileOut.newLine();
                    count++;
                } // end if
                
                txtRecord = fileIn.readLine();
            } // end while
            
            // close file I/O streams
            fileIn.close();
            fileOut.close();
            
            // append new record to bhaarat.text
            fileOut = new BufferedWriter(new FileWriter("bhaarat.text", true));
            fileOut.write("23. English");
            fileOut.newLine();
            fileOut.close();
        }
        catch (IOException ex){
            System.out.println("Error during file I/O");
            return;
        } // end try-catch
        
        System.out.println("File I/O finished sucessfully.");
    } // end main

} 

[chandru]

I tried to do this in C++ which is a new language for me.

So this program checks for two unicode characters I chose randomly in my native tongue. The test data is the same list in tamil, which I have attached. Change line 39 if you want to use different criteria.

EDIT 1: Bug fixed in the next post (#27)

#include <iostream>
#include <fstream>

using namespace std;

// removes the serial numbers from the beginning of the line
wstring getlanguage(wstring line) {
  // find the space in the string
  wchar_t delim = ' ';
  wstring::size_type delim_loc = line.find(delim, 0);

  // get substring from the first character after space till the end
  if (delim_loc != wstring::npos) 
    return line.substr(delim_loc + 1);
  else
    return line;
}

int main() {
  wifstream infile;      //input file
  wofstream outfile;     //output file
  wstring line;        //line of data
  int index = 1;        //serial number for output file
  locale loc("");       //unicode

  // open file and proceed if file exists
  infile.open("bhaarat.txt");
  infile.imbue(loc);

  if (infile.is_open()) {
    outfile.open("out.txt");
    outfile.imbue(loc);

    // read a line
    while (getline(infile, line)) {
      wstring lang = getlanguage(line);
      //if first character is one of two unicode chars write to file 
      if (lang.at(0) == L'க' or lang.at(0) == L'த')
        outfile << index++ << ". " << lang << endl;
    }

    // free resources
    infile.close();
    outfile.close();
  }

  // write a line to the original file
  outfile.open("bhaarat.txt", ios::app);
  if (outfile.is_open())
    outfile << "23. ஆங்கிலம்" << endl;
  outfile.close();

  return 0;
}

[chandru]

Bug in the last program (post #26), where the original file was not modified.

Corrected version

#include <iostream>
#include <fstream>

using namespace std;

// removes the serial numbers from the beginning of the line
wstring getlanguage(wstring line) {
  // find the space in the string
  wchar_t delim = ' ';
  wstring::size_type delim_loc = line.find(delim, 0);

  // get substring from the first character after space till the end
  if (delim_loc != wstring::npos) 
    return line.substr(delim_loc + 1);
  else
    return line;
}

int main() {
  wifstream infile;      //input file
  wofstream outfile;     //output file
  wstring line;        //line of data
  int index = 1;        //serial number for output file
  locale loc("");       //unicode

  // open file and proceed if file exists
  infile.open("bhaarat.txt");
  infile.imbue(loc);

  if (infile.is_open()) {
    outfile.open("out.txt");
    outfile.imbue(loc);

    // read a line
    while (getline(infile, line)) {
      wstring lang = getlanguage(line);
      //if first character is one of two unicode chars write to file 
      if (lang.at(0) == L'க' or lang.at(0) == L'த')
        outfile << index++ << ". " << lang << endl;
    }

    // free resources
    infile.close();
    outfile.close();
  }

  // write a line to the original file
  outfile.open("bhaarat.txt", ios::app);
  outfile.imbue(loc);
  if (outfile.is_open()) 
    outfile << L"23. ஆங்கிலம்" << endl;
  outfile.close();

  return 0;
}

[OutOfReach]

Here is mine, I might add that unicode thing after I do some reading, so expect some changes, Again suggestions would be appreciated.

import os

def main():
    if not os.path.exists("bhaarat.text"):
        print "Error: 'bhaarat.text' does not exist! The program cannot continue!"
        exit(1)
    elif os.path.exists("bhaarat.text"):
        inFile = open("bhaarat.text")
        outFile = open("out.text", "w" )
        lineNumber = 0
        for line in inFile:
            line = line.split()[1]
            if line.startswith("H") | line.startswith("S"):
                result = "%i. %s\n" % (lineNumber, line)
                outFile.write(result)
                lineNumber += 1
        outFile.close()
        inFile = open("bhaarat.text", "a")
        inFile.write("23. English\n")
            
            
if __name__ == "__main__":
    main() 

[arsenic23]

I had no idea that there was any effort behind unicode strings in python. I thought all I'd have to do was put a 'u' before the strings when I first declared them. Good fun. Hopefully I haven't missplaced an error like last time. I'm fairly sure this is good to go though.

Code could be a little more compact, a few lines could be combined into something smaller, but I think this is easier on the eyes.

#!/usr/bin/env python
# -*- coding: utf-8 -*-
# coding=UTF-8

Hindi=u"हिन्दी"
Sanskrit=u"संस्कृता वाक"
langs=[]
inputText=""    # incase of IOError
try:    inputText=open('bhaarat.text','r').readlines()
except IOError:    print "Whoa whoa, where's your bhaarat.text?"
for items in inputText:
    langs.append(items.split('. ')[1].split('\n')[0])

outputText=u""
att=0        # Generic counter
for items in langs:
    if items[0].lower() == 's' or items[0].lower() == 'h':
        if items.lower() == 'hindi': outputText += "%i. %s (%s)\n" %(att,items,Hindi)    
        elif items.lower() == 'sanskrit': outputText += "%i. %s (%s)\n" %(att,items,Sanskrit)    
        else:    outputText+="%i. %s\n" %(att,items)
        att+=1

open('out.text','w').write(outputText.encode("UTF-8"))
if inputText[-1].startswith('23'): None    # Don't want to do this more then once
else:    open('bhaarat.text','a').write("23. English") 

[badperson]

here's mine:
I realized I blew it on the last one...d'oh...so stupid, but I think this one works correctly.

/**

Ubuntu forum challenge #2
File i/o


*/

import java.util.*;
import java.io.*;
import java.util.regex.Pattern;
import java.util.regex.Matcher;

public class UbuntuFileReaderChallenge{

	ArrayList<String> newFileList;
	ArrayList<String> revisedOldFileList;
	BufferedReader br;
	BufferedWriter newFileBR;


	public void readInputFile(File file){

		System.out.println("reading file input...");
		try{
			newFileList = new ArrayList<String>();
			revisedOldFileList = new ArrayList<String>();
			br = new BufferedReader(new FileReader(file));
		
			String line = "";
			// read input from text file
		while((line=br.readLine()) != null){
		// pick out number, figure out what letter each word begins with  and add text to arrayLists
		populateAndAnalyzeList(line);
		}
		System.out.println("writing new file...\n");		
		writeNewFile();

		// now overwrite old file and add English at the end
		System.out.println("re-writing original file...");
		BufferedWriter bw = new BufferedWriter(new FileWriter(file));
		
		bw.write("List of Languages\nFile modified by " + this.getClass() + "\nfor Ubuntu Forum Challenge #3\nWritten by Badperson\n\n");
		int counter = 1;
		for(Iterator i = revisedOldFileList.iterator(); i.hasNext();){
		String language = (String)i.next();
		bw.write(counter + ". " + language + "\n");
		counter++;

		}

		bw.write(counter + ". " + "English");
		bw.close();	
		System.out.println("done.");
		} catch(IOException e){
		System.err.println("problem reading input file...make sure bhaarat.text is in the same directory in which the app is run...");
		e.printStackTrace();
		}


	} // end read input file method

	public void populateAndAnalyzeList(String text){
	



	// regex to pick out number
	Pattern lineFormat = Pattern.compile("\\d+\\.");
	Matcher lineFormatMatcher = lineFormat.matcher(text);
		while(lineFormatMatcher.find()){

		// take number out of line
		text = lineFormatMatcher.replaceAll("");
		// eliminate leading space
		text = text.replace(" ", "");
		revisedOldFileList.add(text);
			// pick out words that start with h or s and add them to their own list
			if(text.startsWith("S") || text.startsWith("s") || text.startsWith("H") || text.startsWith("h")){
			newFileList.add(text);
			}

		
		}




	} // end populateAndAnalyzeList method

	public void writeNewFile(){

		try{

		
		BufferedWriter newFileBR = new BufferedWriter(new FileWriter(new File("out.txt")));
		newFileBR.write("Output File for Ubuntu Forum Programming Challenge #3\nWritten by Badperson\n\n");
		// write out new file:
		int counter = 1;

		for(Iterator i = newFileList.iterator(); i.hasNext();){
		String language = (String)i.next();
		newFileBR.write(counter + ". " + language + "\n");
		counter++;
		}
		newFileBR.close();


		} catch(IOException e){
		System.err.println("problem writing new files...");
		e.printStackTrace();
		}
		


		


	

	}

	


//main
	public static void main(String[] args){
	new UbuntuFileReaderChallenge().readInputFile(new File("bhaarat.text"));
	}



} // end class

bp