Sujit Maharjan

leetcode

Sat, 21 Sep 2024 00:00:00 +0000

Data wrangling with short python code

Sun, 13 Sep 2020 00:00:00 +0000

If you work with data on day to day basis. I think you will encounter a problem of incompatible data types ie. some datas are stored in csv files while other are in json or even yaml or toml file. All of these files have their own advantage of disadvantage and sometimes we need to convert all of data to a single format for further analysis. This article presents tools that I used in day to day basis to carry out that particular task.

Tools for managing cluster

Sat, 12 Sep 2020 00:00:00 +0000

When you are in a job that demands you handle or maintain a custer of computers. You will most likely have to do following tasks:

execute the same set of commands to explore the state of all the machines
run a script on all the machines
upload files from all of the machines
download file from all of the machines.

Here are the sets of scripts that has been helpful for me.

Creating Debian Package

Thu, 20 Aug 2020 00:00:00 +0000

Debain package is a tar file that contains the files required by an application along with some script and description about the application and its depedency. This tutorial will guide you to create a simple debian package by hand.

Create the directory to hold the project

mkdir /tmp/<package>_<version>_<architecture>

Please replace by package name, by version and by the architecture that the package has been created for.

Creating Homebrew Formula aka Package

Thu, 20 Aug 2020 00:00:00 +0000

The creator of the homebrew package manager is playing with the word brew which stands for the process of preparing a beer. The brew uses the package manager uses terminology that relates to brewing process. The term that we use for the repository in the debian world here is called tap. While, the term used for package is called Formula.

Homebrew Formula differs from the Debain package in that homebrew formula does not contain the actual software but contains instruction on how those softwared can be build. The homebrew forumula is just a ruby files that has instruction of how to compile the source code and how those files are placed on the system. Therefore, creating a homebrew package means you write a ruby class which has instruction on how the software source is to be installed on the system.

Creating your first systemd service

Thu, 20 Aug 2020 00:00:00 +0000

Systemd is at the time of writing this article is the de-facto init system for Linux. Systemd has three primary aspect:

System and service manager
Software platform for developing other applications
“Glue” between the kernel and user applications

Units Link to heading

Systemd manages units. Units have dependency and systemd handles that dependency. Location of unit file paths:

/lib/systemd/system :; for package-installed units
/etc/systemd/system :: for administrator-configured units
/run/gystemd/system :; for non-persistent runtime modification

Unit files are named in following convention name.type. For example: ssh.socket, example.service. The unit file follows toml like syntax.

DateBS

Sat, 11 Jul 2020 00:00:00 +0000

A python/javascript library that converts date from BS to AD and vice versa and is intended to be used in google sheet addon, libreoffice calc extension, pandas.

Use Link to heading

Google Sheet AddOn/ LibreOffice Calc Extention Link to heading

The addons expose following custom function so that date from BS to AD and vice versa.

Facebook Chat Bot From Google App Script

Sun, 05 Jul 2020 00:00:00 +0000

A Google App Script library that ease in creation of fbChat Bot using Google App Script. Suitable for personal project.

Usage Link to heading

ProjectId:Mv5AiDrYjIUDuX4K_XPiByj6333tZbdFa

Go to Resources > Libraries and add the above library using the above project id.

Learn By Example Link to heading

Sample code to create echo bot Link to heading

var BOT = new fbBot.Bot(ACCESS_TOKEN,VERIFY_TOKEN);
function doGet(request) {
    return BOT.verify(request);
}

function doPost(request) {
    Logger.log("received "+JSON.stringify(request));
    BOT.addResponse( messageEvent =>
    {
    BOT.sendMessage(messageEvent.sender.id,new Message().addText("got text: " + messageEvent.message.text));
    },
    messageEvent =>
    {
      return true;
    }
    );
    return BOT.response(request);
}

Create quick reply Link to heading

      let message = new fbBot.Message();
      message.addText("Hi, How may I help you?");
      Logger.log("Added Text "+JSON.stringify(message));
      message.createReply("Buy","BUY");
      Logger.log("Added First Reply "+JSON.stringify(message));
      message.createReply("Inquire","INQUIRE");
      Logger.log("Added Replies "+JSON.stringify(message));
      BOT.sendMessage(messageEvent.sender.id,message);

Creating a Generic Template Link to heading

let message = new fbBot.Message();
let template = new fbBot.Template();
let buttons = new fbBot.Buttons();
buttons.addUrlButton("Website","https://maharjansujit.com.np");
buttons.addPostbackButton("Checkout","BUY checkout");
buttons.addCallButton("Contact","+977 9888888888");
template.addElement("Gas","subtitle","https://maharjansujit.com.np/logo.jpg","url","https://maharjansujit.com.np",buttons);
message.addTemplate(template);

github

SheetDb (A Google App Script Library)

Sun, 05 Jul 2020 00:00:00 +0000

Google app script library that lets you use google sheet like a key value pair database.

Usage Link to heading

ProjectId:Mh3fuMDJ6YrJ-WBuWKeMtlj6333tZbdFa

Go to Resources > Libraries and add the above library using the above project id.

Learn By Example Link to heading

Open a spreadhseet as sheetdb Link to heading

var sid = "1Y6N-jNCF23TyE8WbV8FEEfUcdDDCw5IlvNt9wCOwg9w";
db = new SheetDb(sid,"SheetName");

Add record Link to heading

let value = {"first_name":"sujit","last_name":"maharjan"};
db.set(value);

Read record Link to heading

let value = db.get({"first_name":"sujit"});

Update record Link to heading

db.update({"first_name":"sumit"},{"first_name"":"sujit"});

Delete record Link to heading

db.removeRows({"first_name":"sujit"});

github

telgram chat bot from Gooogle App Script

Sun, 05 Jul 2020 00:00:00 +0000

This projects intends to serve as library to ease in creation of telegram chat Bot using Google App Script.

Usage Link to heading

ProjectId:MPYd_nqgatBHdfoP1CC636z6333tZbdFa

Go to Resources > Libraries and add the above library using the above project id.

Learn By Example Link to heading

Sample code to create echo bot Link to heading

BOT = new Bot(token);
BOT.addResponse(
  (message) => {
        let mes = { "text": message.text };
        BOT.sendMessage(message.chat.id,mes);
        return true;
    }, 
    (message) => true);
    
function doPost(request)
{
   let response=BOT.response(request);
   return response;
}

Manually get update Link to heading

  let updates = JSON.parse(BOT.getUpdates()).result;
  for ( upIndex = 0; upIndex < updates.length; upIndex++)
  {
    let update = updates[upIndex];
    BOT.respondToMessage(update.message);
  }

github

NL Store Facebook Shopping Chat Bot

Sat, 20 Jun 2020 00:00:00 +0000

NL Store is a simple chat bot to help the current consumers of the store to see the present stock detail and order things online. The aim of this chat bot is to reduce the number of consumers that are present in the physical store so as social distancing can be maintained during the period of COVID 19 pandemic.

Features and limitations Link to heading

Customer can inquire about the price of available items
Customer can ask for the delivery of the items
The online payment fabcility is not available as this chat bot is only developed for Lalitpur, Nepal where online payment system is not widespread and easily accessible for general public.
The service is available only for the old customer who we have already previosly delivered the product as the postal delivery system is not developed enough to deliver by provided address.
The chat bot only supports english for now. The support for the Nepali and Nepal Bhasa will be added in future if the customer demand them.

Privacy Policy Link to heading

The application does not store any information about the customer when you just inquire for stuff available for sell. However, when the customer places and order we will have to store the customer name and things that have been ordered. The information will be used to issue bill as per the legal requirement and used for packaging the order for a quick pick up or home delivery with some delivery charge.

NepalDataScrapper

Tue, 09 Jun 2020 00:00:00 +0000

A python/javascript project that scraps the data from website to collect the data about Nepal for the use in further analysis through pandas or libreoffice sheet or google sheet. Currently scrapping of the NEPSE Share price has only be implemented.

Usage: Link to heading

Python library: Link to heading

pip install nepaldatascrapper

example code Link to heading

import sys
from nepaldatascrapper import NEPSE

nepse = NEPSE()

def nepseSharePrice(symbol,date=""):
    return nepse.getSharePrice(symbol,date)

if __name__ == "__main__":
    print(nepseSharePrice("BPCL","2020-07-01"))

Google Sheet Addon/Libreoffice Calc Extension Link to heading

This is simple google sheet add ons that adds the custom function in google sheets which will make it easier to get the Nepal related Data in google sheets. Currently, it can get the NEPSE stock price data for you.

Telegram Chat Bot

Mon, 27 Apr 2020 00:00:00 +0000

ChatBot is an application that is designed to receive and send messages. ChatBot is dependent on the chat application same as a software is based on your operating system. Most chat application provides an API interface that lets an application send and receive messages. I will be going through a simple telegram chat bot application.

Telegram provides an API so that bot can interface with telegram. Telegram bot can be registered by chatting with a telegram bot called BotFather. Just search for BotFather in telegram and start chatting by sending /start text message. You can then create a new bot by sending text message /new bot. When registering process is completed, BotFather will provide you with token that will look something like 110201543:AAHdqTcvCH1vGWJxfSeofSAs0K5PALDsaw. This token is used to authenticate the bot. You can make requests on behalf of bot using following syntax. https://api.telegram.org/bot<token>/METHOD_NAME.

Working with SSL Certificate

Wed, 16 Jan 2019 00:00:00 +0000

SSL stands for Secure Sockets Layer which can be defined as a standard security protocol for establishing encrypted links between a web server and a browser so that user’s data privacy is respected and nobody is spying in the middle which is very crucial in the day and age especially after snowden revelation.

Openssl tool set can be used as a arsenal for carrying out almost every task you can think of related to ssl certificate. This guide defines the method of Certificate Signing Requests (CSRs) and generating the self signed certificate and finally converting the ssl certificate in the required format.

Installing Apache Spark on Mac

Wed, 02 Jan 2019 00:00:00 +0000

Apache Spark is the best method of producing the result from the big data.

Installing apache-spark

brew install apache-spark

starting spark

spark-shell

Installing Hbase on Mac

Wed, 02 Jan 2019 00:00:00 +0000

Apache Hbase is the open source implementation of the Google’s big table NOSQL Database. It is the distributed, column oriented, NOSQL database that can use hadoop to store data. It provides us with the fast storage and retrieval of naturally occuring sparse data that may have a variable schema. We can further utilize the another layer like Apache pheonix, Apache hive to get SQL syntax compability.

Since the Hbase extends the Hadoop ecosystem we should first install Hadoop. Please follow the previous post on the installation of the Hadoop on Mac before proceding.

Tutorial on Hbase shell command

Wed, 02 Jan 2019 00:00:00 +0000

Apache HBase is the column oriented NOSQl Database that is based on the Big Table paper by Google. It works on the top of hadoop and thus supports fast storage and retrieval of naturally.

Apache HBase schema is different from the SQL schema in which we have a number of columns which hold the data of specific size. In Hbase all the data is type is stored in bytes and the table is divided into column family which can hold multiple number of columns. The schema must be defined in such a way that the data of the column family are accessed together. This design enables Hbase to access the data in the same column family together thus enabling to retrieve the data faster.

Installing Hadoop on Mac

Tue, 01 Jan 2019 00:00:00 +0000

Hadoop is the open source implementation of the Google File System and the basis of the present hype in the Big Data. If want to explore and are seeking for the carrer in the Big Data ecosystem then learning about the Hadoop is must. The process of installing the Hadoop is not straightforward as it requires setting up the specific version of the java and right configuration. The steps written below specifies the method that I used to deploy Hadoop on my personal Mac.

Hosting react app on gitlab pages

Thu, 06 Dec 2018 00:00:00 +0000

React is the javascript library that helps to create a stateful userside web application. If you are planning to create an app that does not require server side computation at all then gitlab pages will be an excellent method to disclouse your creation to the rest of the world. The gitlab pages are not only free like github pages but also offers additional feature of being able to add your own domain name and ssl certificate.

Image Captioning Demystifying Deep Learning and How to Get Started

Sat, 30 Dec 2017 00:00:00 +0000

We conceived AI(Artificial Intelligence), more specifically Deep Learning as a complex and difficult task. I do agree with concept that Deep Learning is difficult but that doesnot mean that there is no intitution behind it.

Introduction Link to heading

For me at least I think eveything started with Alan Turing and his turing machine. He formulated theory of the what can the finite state machine can be used to achieve. He put forward the theory of Universal turing Machine. In short its a finite state machine that can simulate other finite state machine. It then begs the queestion are human finite machine. Can we simulate human beings with computer?

Increase Open Access Project Accessibility By Considering Web Accessibility

Sun, 03 Dec 2017 00:00:00 +0000

As a AI (Artificial Intelligence) Researchers what I do is I look at the previous data or history and infer rules from it. So lets pick into history to understand the importance of open access, open research, open education and web accessibility.

History subject may have been for many of you a headache in your school as you had to memorize the events and dates not analyze the cause and effect of such event. This is what makes the History subject a path-shower for future for intelligent person.

Deep Learning with pytorch

Sat, 25 Nov 2017 00:00:00 +0000

Alan Turing in his paper described a Universal Truing Machine. A universal turing machine is a king of finite state machine which can simulate other finite sstate machine.

We can extend this idea. What if Human are finite state machine? This leads to the possibility of Human being simulated by Computers. THis may go against our instituion as Human relatively behaves in undeterministic way but this can be just because of large number of state that a human posses.

Tech Talk 24th session

Fri, 16 Jun 2017 00:00:00 +0000

The 24th session of Tech Talk was held on 16th June,2017 in F Hall of Civil Department, Pulchowk. We had 41 participant during this event.

Host:

Biplab Gautam

Speaker	Topic	Downloads
Rosina Adhikari	Bio Chips	slide
Anisha Karki	Voided and non-voided concrete slab	slide

Tech Talk 25th session

Fri, 16 Jun 2017 00:00:00 +0000

The 24th session of Tech Talk is going to be held on 16th June,2017.

Schedule:

4:00 pm : 5:00 pm Guest Speaker

Join Facebook event:

facebook event

Tech Talk 23rd session

Mon, 05 Jun 2017 00:00:00 +0000

The 23rd session of Tech Talk is going to be held on 5th June,2017 in third floor of C-Block ,Pulchowk Campus. (Department of Electrical Engineering)

Host:

Biplab Gautam

Speaker:

Basanta Chaulagain

Topic Registration and slide submission deadline: 20th May 2017 (Saturday) 8 pm to email id 070BEX443@ioe.edu.np

Schedule:

5:00 pm-: 5:30 pm 1st speaker presentation

5:30 pm : 6:00 pm 2nd speaker presentation

Join Facebook event:

facebook event

Tech Talk 22nd session

Tue, 23 May 2017 00:00:00 +0000

The 22nd session of Tech Talk is going to be held on 21st May,2017 in third floor of C-Block ,Pulchowk Campus. (Department of Electrical Engineering)

Host:

Sujit Maharjan

Speaker:

Richa Adikhari
Pratik Luitel

Topic Registration and slide submission deadline: 20th May 2017 (Saturday) 8 pm to email id 070BEX443@ioe.edu.np

Schedule:

8:30-8:45 1st speaker presentation

8:45-9:00 2nd speaker presentation

9:00-9:15 Break and extra adjustment time

Join Facebook event:

facebook event

Tech Talk 21st session

Sun, 26 Feb 2017 00:00:00 +0000

Tech Talk 21st session was successfully conducted on 26th February 2017. At Disaster Hack, Jhamshikel, Lalitpur Nepal at 8:30 am in the morning.

Hosted by:

Ranjana Kushwaha

Speakers and there topics:

Name	Topic	Class	Downloads
Anmol Paudel	Genetic Engineering		slide
Ayush Kafle	Digital Image Processing	070BEX	slide

#Links to Youtube Videos

Anmol Paudel “Genetic Engineering”

Tech Talk 20th session

Sun, 19 Feb 2017 00:00:00 +0000

Tech Talk 20th session was successfully conducted on 19th February 2017. At Disaster Hack, Jhamshikel, Lalitpur Nepal at 8:30 am in the morning.

Hosted by:

Sujit Maharjan

Speakers and there topics:

Name	Topic	Class	Downloads
Biplab Gautam	Bitcoin		slide
Bikki Chantyal	Reimann Hypothesis		slide

#Links to Youtube Videos

Biplab Gautam “Bitcoin”

Tech Talk 19th session

Sun, 05 Feb 2017 00:00:00 +0000

Tech Talk 19th session was successfully organized on 5th February 2017 at 8:30 am at Pulchowk Engineering Campus. The event was hosted by Misan Baral. There were two speakers in the event who shade lights on different topics.

Name	Topic	Class	Downloads
Bipin Lekhark	DirectX Gaming	070BEX	slide
Gaurav khatri	Speech Recognition	070BEX	slide

#Links to Youtube Videos

Bipin Lekhak “DirectX Gaming”

Tech Talk 19th session information

Mon, 23 Jan 2017 00:00:00 +0000

The 19th session of the Tech Talk has been scheduled on 5th February 2017. The event will take place in 2nd floor of top of the world cafe in Jhamshikel, Lalitpur.

Host : Misan Baral

Speakers:

Gaurav Khatri
Bipin Lekak

Speakers and Host are requested to fill this form at Registration

Event activity:

Presentation
Podcast Recording

Map:

Tech Talk 18th session

Fri, 20 Jan 2017 00:00:00 +0000

Tech Talk 18th session was successfully organized on 20th January 2017 at 11 am at Pulchowk Engineering Campus. The event was hosted by Ranjana Kushwaha. There were four speakers in the event who shade lights on different topics.

Name	Topic	Class	Downloads
Ayush Kafle	Productivity	070BEX	slide
Sujit Maharjan	Automation	070BEX	slide
Aashish Bhandari	Project Soli	070BEX	slide
Amir Rimal	Freudian Personality Theory	070BEX	slide

Links to Youtube Videos Link to heading

Ayush Kafle “Productivity”

Tech Talk 17th session

Fri, 13 Jan 2017 00:00:00 +0000

Tech Talk 17th session was successfully organized on 17th January 2017 at 4 pm at Pulchowk Engineering Campus. The event was hosted by Suyogya Pun. There were three speakers in the event who shade lights on different topics.

Name	Topic	Class	Downloads
Ranjana Kushwaha	The telephone System	070BEX	slide
Sujit Maharjan	Concensus and BlockChain Model	070BEX	slide paper
Bidur Khanal	Brain Computer Interfacing	070BEX	slide

MethStudio (Graphics Project)

Sun, 08 Jan 2017 00:00:00 +0000

This is the project I created 2016 as a graphics project for my computer graphics class. The main purpose of this project was to learn about computer graphics. This program uses OpenGl and GSL (Graphics Shading Language) for creating molecular formula. It uses Qt as the graphical window manager. It can draw molecular formula from the coordinate file of molecular formula.

Tech Talk 16th session

Sun, 08 Jan 2017 00:00:00 +0000

Tech Talk 16th session was successfully organized on 6th January 2017 at 8:30 am at Pulchowk Engineering Campus. The event was hosted by Sujit Maharjan. There were four speakers in the event who shade lights on different topics.

Review of The GrownUps by Gillain Flynn

Wed, 21 Dec 2016 00:00:00 +0000

If your the person who loved the book ‘Gone Girl’. This story would not disappoint you. The story puts you in the similar situation and creates a similar mysterious environment. A girl who looks like a normal being but is actually manipulative and would use sex and anything for her own gain.

The story begins with a canny young woman is struggling to survive by perpetrating various levels of mostly harmless fraud. On a rainy April morning, she is reading auras at Spiritual Palms when Susan Burke walks in. A keen observer of human behavior, our unnamed narrator immediately diagnoses beautiful, rich Susan as an unhappy woman eager to give her lovely life a drama injection. However, when the “psychic” visits the eerie Victorian home that has been the source of Susan’s terror and grief, she realizes she may not have to pretend to believe in ghosts anymore. Miles, Susan’s teenage stepson, doesn’t help matters with his disturbing manner and grisly imagination. The three are soon locked in a chilling battle to discover where the evil truly lurks and what, if anything, can be done to escape it.

How to solve mnemosyne, anki not opening error in ubuntu 16.10

Wed, 23 Nov 2016 00:00:00 +0000

If your like me and have recently updated your ubuntu to 16.10 yaketty and found your flash card/space repition application not working your not alone.

As explained in debian wiki. The problem is that the QtWebKit has been removed from the Qt4, related to migration to Qt5/blink. Due to the reason if your using any application that depends on PyQt4 and QtWebKit are broken till date. The problem will only be solved when the application is updated to use the upgraded version of the library.

A new website for COA labs released

Mon, 14 Nov 2016 00:00:00 +0000

My cpp lab work has been released on the new site coalab.maharjansujit.com.np. If your are intrested to looking into my implementation or else are stuck and need some hint Please feel free to take a look at it.

If you find any error on the code please feel free to submit the corrected code in the github.

Warning : For the students. 1. Copying whole source code is not recommended 2. The code may be faulty and you may have to correct it

A new website for cpp labs released

Mon, 14 Nov 2016 00:00:00 +0000

My cpp lab work has been released on the new site cpplab.maharjansujit.com.np. If your are intrested to looking into my implementation or else are stuck and need some hint Please feel free to take a look at it.

If you find any error on the code please feel free to submit the corrected code in the github.

Warning : For the students. 1. Copying whole source code is not recommended 2. The code may be faulty and you may have to correct it

A new website for Numerical method labs released

Mon, 14 Nov 2016 00:00:00 +0000

My cpp lab work has been released on the new site nmlab.maharjansujit.com.np. If your are intrested to looking into my implementation or else are stuck and need some hint Please feel free to take a look at it.

If you find any error on the code please feel free to submit the corrected code in the github.

Warning : For the students. 1. Copying whole source code is not recommended 2. The code may be faulty and you may have to correct it

Review of No One Knows by JT Ellision

Mon, 14 Nov 2016 00:00:00 +0000

No One Knows is a thriller novel by The Girl on Train and The Husband’s Secret, New York Times bestselling author J.T.i Ellision. The book has carried on the authors reputation of bringing twist on every pages and making readers engage and guessing till the whole pages of the book has been turned.

The story begins with the Aubrey Hamilton’s husband being declared dead by state of Tennessee. Aubrry has suffered these 5 years of husband’s disseparance or may be his death in grief and being suspect of her husband’s murder. Should Aubrry move on? Or Should she proceed to find out what actually happened to her husband?

Beta release of classweb

Tue, 16 Dec 2014 00:00:00 +0000

I would like to annouce the beta release of the Classweb. Please get your hands dirty on testing the site.

The major purpose of this website is to act as the ultimate place for getting class notification via CR or teacher or other friends directly. So students dont have to miss out on any class notices.

Mon, 01 Jan 0001 00:00:00 +0000