Technology @ Kunal Cholera

Script to fill forms automatically.

Kunal Cholera — Sun, 21 Feb 2010 08:51:00 +0000

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

using System.Net;
using System.IO;
using System.Text.RegularExpressions;

namespace AutomationPost
{

	public class PersonInfo
	{
		public String name;
		public String email;
		public String contactNumber;
	}

	class Program
	{

		static List myVoters = new List();

		static void GenerateVoters()
		{
			//Scrap info from web site. or
			//http://hphappywheels.com/winners.php

			WebClient myDownloader = new WebClient();
			String webPageContents = myDownloader.DownloadString("http://hphappywheels.com/winners.php");
			webPageContents = webPageContents.Substring(webPageContents.IndexOf("919821232422")-30, webPageContents.Length - webPageContents.IndexOf("919821232422")-15);

			//Regex extractNameNumber = new Regex(@"(.*?)(.*?)(.*?)(.*?)(.*?)(.*?)(.*?)");
			Regex extractNameNumber = new Regex(@"(.*?)");
			MatchCollection myDataMatches = extractNameNumber.Matches(webPageContents);

			int baseOffset = 0;
			int currentIncrement = 3;

			for (int i = 0; i <= 1000; i ++)
			{ // 0 1 +4
			  // 4 5
				PersonInfo info = new PersonInfo();
				info.contactNumber = myDataMatches[baseOffset].Groups[1].Value;
				baseOffset++;
				info.name = myDataMatches[baseOffset].Groups[1].Value;
				baseOffset += currentIncrement;
				currentIncrement = (currentIncrement == 3)? 2 : 3;
				info.email = info.name.Replace(" ", "") + "@gmail.com";
				myVoters.Add(info);
			}
		}

		static void Main(string[] args)
		{
			int voteOffset = 66;
			GenerateVoters();			

			foreach (PersonInfo voter in myVoters)
			{
				String parameters = "name=" + voter.name + "&email=" + voter.email + "&contactno=" + voter.contactNumber + "&profile_id=73&votes=" + voteOffset + "&flag=vote&follo=0";

				StreamWriter myWriter = null;
				HttpWebRequest objRequest = (HttpWebRequest)WebRequest.Create("http://lavasawomensdrive.com/profile.php");
				objRequest.Method = "POST";
				objRequest.ContentType = "application/x-www-form-urlencoded";
				objRequest.ContentLength = parameters.Length;

				try
				{
					myWriter = new StreamWriter(objRequest.GetRequestStream());
					myWriter.Write(parameters);
				}
				catch (Exception e)
				{
					//Handle error
				}
				finally
				{

					myWriter.Flush();
					myWriter.Close();
					myWriter.Dispose();
					myWriter = null;
					objRequest = null;
				}

				voteOffset++;
				Console.WriteLine(voteOffset);
				System.Threading.Thread.Sleep(1000);
			}

			//myWriter.Close();
		}

	}
}

Regular expressions Interview Questions and Answers

Kunal Cholera — Thu, 21 Jan 2010 04:30:15 +0000

Reading Writing and Editing XML files using C Sharp.

Kunal Cholera — Thu, 21 Jan 2010 04:29:06 +0000

Stock portfolio application - Yahoo Finance and Yahoo pipes.

Kunal Cholera — Thu, 07 Jan 2010 06:25:48 +0000

* Building Query string of Stocks

* Using Yahoo pipes to generate portfolio related xml file.

* Building application that uses this xml file for portfolio management.

* I will show detailed steps soon.

Facebook Programming Puzzles - User Bin Crash Solution !

Kunal Cholera — Sat, 31 Jan 2009 10:21:58 +0000

User Bin Crash
You are on a cargo plane full of commercial goods when the pilot announces that the plane is short on fuel. Unless cargo is ejected from the plane, you will run out of fuel and crash. The pilot provides you with the number of pounds of weight that must be ejected from the plane. Fortunately, the manifest of the plane is both completely accurate, digitized, and you are a programmer of some repute. Unfortunately, your boss is going to be extremely unhappy, and wants you to exactly minimize the losses to the absolute minimum possible without crashing the plane. The manifest does not contain the exact quantities of every type of good, because you have so many on board. You may assume that you will not run out of any good in the course of saving the plane. You also realize this kind of program could be handy to others who find themselves in similar situations.

Write a program that takes a single argument on the command line. This argument must be a file name, which contains the input data. The program should output to standard out the minimum losses your boss will incur from your ejection of goods (see below). Your program will be tested against several manifests of several crashing planes; each with different data. Additionally, your program must be fast, and give the correct answer.

Input specifications
The input file will start with an integer number indicating the minimum number of pounds of weight that must be ejected from the plane to prevent a crash, followed by a new line. Each additional line in the file represents a commercial SKU (stock keeping unit) along with its cost (in dollars) and weight (in pounds). The format of these lines is:

SKUs are represented as a combination of letters (upper and lower case) and numbers. Both costs and weights are integers. Each piece of data in a line is separated by white space. Lines are separated by a single new line character. You are guaranteed your program will run against well formed input files.

Example input file:

1250
LJS93K 1300 10500
J38ZZ9 700 4750
HJ394L 200 3250
O1IE82 75 10250

Output specifications
Your boss is not interested in exactly what you ejected to save the plane, he/she is currently only interested in how much it will cost the company. Your program must find the set of goods that will prevent the plane from crashing, and minimize company losses. It should print out the total value of goods lost as a plain integer, followed by a newline. Do not insert commas or dollar signs.

Example output (newline after integer):

9500

———

/*
Author : Kunal Cholera
email : kunalcholera@gmail.com
web : http://tech.kunalcholera.com
date : 31st Jan 2009
time : 11:00 pm

Problem definition : http://tech.kunalcholera.com/facebook-programming-puzzlesfacebook-programming-puzzles/

Instructions to compile : g++ f1.cpp
Instructions to execute : ./a.out

Expected output : Lowest Cost : 9500

/* Input Array

1250
LJS93K 1300 10500
J38ZZ9 700 4750
HJ394L 200 3250
O1IE82 75 10250

/* Array to be formed is as follows :
item cost cost/item Cost throwing only this item
700 4750 6 9500
1300 10500 8 10500
200 3250 16 22750
75 10250 136 174250

- Better improvement would be to check if there is other combinations of rows that lead to lower minimum
- replace numberOfLines variable with the actual variable depending on the file size.


#include
#include

using namespace std;

int main(){

// Read and parse the input file based on tabbed data - \t

FILE *fileReader;
char *fileName = "input.txt";

fileReader = fopen( fileName, "r");

if( !fileReader ){
    cout<<"Could not open"<< fileName < 0){
    fscanf( fileReader, "%s\t%u\t%u" , &tempString, &items[i][0], &items[i][1] );
    items[i][2] = items[i][1]/items[i][0]; // This stores cost per unit of item
    i++;
    remainingLines--;
}

// cout< items[j][2] ){
        temp = items[i][0]; items[i][0] = items[j][0]; items[j][0] = temp;
        temp = items[i][1]; items[i][1] = items[j][1]; items[j][1] = temp;
        temp = items[i][2]; items[i][2] = items[j][2]; items[j][2] = temp;
       }
    }
}

// simply loop through and subtract lowest cost weight till you get minimumWeight <0
int totalCost = 0;

// cout< 0 ){
        weight -= items[i][0];
        totalCost += items[i][1];
    }
    items[i][3] = totalCost;
    // cout<<"Total Cost : "<

SD Shibulal, Co-Founder & COO of Infosys - USC - Leadership Talk

Kunal Cholera — Sat, 08 Nov 2008 01:51:38 +0000

It was a great talk where in Mr Shibulal explained 4 phases he went through as an Software Engineer :

1. Apprentice/Trainee : The key thing which distinguished an excellent trainee from an ordinary trainee is the constant willingness to learn and hard work. It is one of the most difficult period as a Software Engineer. Taking the most out of it, changes the entire career path of the software engineer.

2. Professional : Attention to detail and extremely focused on what is being done. Making sure that no ends is left loose.

3. Manager : Managers tend to quickly give priorities as to what is important and what is not. Thus this becomes a trap that most of the good engineers often tend to fall in. He says there is no such thing as an important thing and not important thing : he says all things need to be kept in mind. He advised not to be afraid to be a manager, he says a good engineer is good manager as well. According to him, there is no such thing as compartmental core competency, rather it is on all fronts.

4. Leader- Phase 4 : Leadership by example, if you want to lead people, you would have to lead them with trust and with an example. Do you what you expect other to do without defaulting in it.

The best one was this : The secret to success is : ” LUCK - GOD GRACE “. Shibulal from all his life experiences attributes this as the major factor in all success he has seen. This point is based on the strong value system that Mr Shibulal believes in. I strongly agree with this point, given that all the hard work, focus, and all other things, they are not sufficient to gain success, there is this one entity that joins all of these things together : be it being at the right place at the right time, be it luck. And how to get lucky - was answered : having a strong foundation of value system, genuineness, selfless dedicated service to family,society and environment.

One thing Mr Shibulal would have done better given a chance to go back in the past would be : Focusing on maintaing relationships with people, he said he got more number of client because he had more human connects with those people whome he worked with.

This is an extremely important point that Mr Shibulal pointed out : My Mentor - Masahji Stewart also stressed this point when he was sharing his experience with me. Genuenly helping out people and establishing a good connection always helps - be it getting a job, getting a client, getting anything.

The World is a small place. Hope this post encorages all those who read it and a special thanks to Mr Shibulal for taking time out and giving this wonderful insight on his career.

Kunal Cholera

Courses I took at USC

Kunal Cholera — Sat, 19 Jul 2008 02:12:51 +0000

Fall 2008
Computer Security

Spring 2008
Web Technology
Analysis of Algorithms
Computer Networks

Fall 2007
User Interface Design
Database Systems
Artificial Intelligence

Online SVN repository Free !

Kunal Cholera — Sat, 19 Jul 2008 02:11:35 +0000

Did you write a lot of code ?
Is coding under deadlines your profession ?
Do you always find youself lossing your code ?
Do you feel helpless in managing your code ?
Do you feel uncertain about making changed to you code ?

—————– This would help a lot ::

Use SVN - Sub Version Source Control for Managing your code.
Tutorial on how to use SVN http://blog.mypapit.net/2007/04/how-to-use-svn-for-beginners.html
Google Provides online free SVN repository at http://code.google.com/hosting/

– After you get used to using SVN , try to install SVN on your own computer. That would be the best thing to do…..

How to make a website ?

Kunal Cholera — Sat, 19 Jul 2008 01:34:27 +0000

To make a website you would need the following ::

1. Domain Name : A domain name is the name of the website. Examples of domain names www.google.com , www.yahoo.com , blog.kunalcholera.com etc..
You would have to buy domain names. There are many websites from which you can buy domain names. www.namesecure.com , www.godaddy.com etc are websites that sell domains for cheap. These domain names cost around $8 to $20 per year. The cost depends on the type of domain name that you buy.

2. Server : A server is a computer. It is a special type of computer which when configured for internet access,does not require monitor and a keyboard. The reason why they dont require a monitor and a keyboard is that, they are generally placed in a datacenter (if you have many servers for your website) . That does not mean you cannot place a server at your home. You can, but is very loud and requires an internet connection, which supports servers. Normal internet connections providers at home would give you a warning after a certain period of time. A server is a place where you will store all the pages of your website. The server will serve all the people on the internet who wants to access your website and who have your domain name.

Given the two requirements to host a website. You have many options :
1. Buy your own server, Buy Domain own IP - Then you can map your domain name to IP Address . Very costly to do this on the begening. Around $20,000 a year.
2. Buy Server Space from Server Hosting Providers -www.bluehost.com is the one i use. Google “internet hosting” for more service providers. Blue host provides both domain names and server space as a combo package. Around $ 100 a year.
3. Get Free Space and Free Domain names - There are many web companies that do that. Google “free internet hosting” and get that. There is a catch though : These web companies would generally have ads on all those pages that you make, or they may add their domain names to your name. Free…

Start from Method 3 to Method 2 to Method 1.

Hope it Helps :: I wish i got this post when i was in my Engineering. It would have been fun…

Kunal Cholera…