Scan-Line polygon filling algorithm

Explained: https://www.cs.uic.edu/~jbell/CourseNotes/ComputerGraphics/PolygonFilling.html

How to include graphics.h  in Code::Blocks IDE https://www.geeksforgeeks.org/include-graphics-h-codeblocks/

How to include graphics.h in DevC++ IDE  https://www.geeksforgeeks.org/basic-graphic-programming-in-c/

Magento: The popular e-commerce platform

What is Magento https://en.wikipedia.org/wiki/Magento

OpenGL color code table

Here is a table for various colors and their corresponding data for OpenGL
https://community.khronos.org/t/color-tables/22518/6

x86 Instruction set

https://www.felixcloutier.com/x86/

Aman's career blog

This is a great blog by Aman Goel for all computer science students https://www.amangoel.in/?m=1

OpenGL: Drawing a Circle in C

C program to draw a circle using OpenGL on Windows in Code::Blocks

// C program to demonstrate
// drawing a circle using
// OpenGL
#include<stdio.h>
#include<GL/glut.h>
#include<math.h>
#define pi 3.142857
// function to initialize
void myInit (void)
{
 // making background color black as first
 // 3 arguments all are 0.0
 glClearColor(0.0, 0.0, 0.0, 1.0);
 // making picture color green (in RGB mode), as middle argument is 1.0
 glColor3f(0.0, 1.0, 0.0);
 // breadth of picture boundary is 1 pixel
 glPointSize(1.0);
 glMatrixMode(GL_PROJECTION);
 glLoadIdentity();
 // setting window dimension in X- and Y- direction
 gluOrtho2D(-780, 780, -420, 420);
}
void display (void)
{
 glClear(GL_COLOR_BUFFER_BIT);
 glBegin(GL_POINTS);
 float x, y, i;
 // iterate y up to 2*pi, i.e., 360 degree
 // with small increment in angle as
 // glVertex2i just draws a point on specified co-ordinate
 for ( i = 0; i < (2 * pi); i += 0.001)
 {
  // let 200 is radius of circle and as,
  // circle is defined as x=r*cos(i) and y=r*sin(i)
  x = 200 * cos(i);
  y = 200 * sin(i);
  glVertex2i(x, y);
 }
 glEnd();
 glFlush();
}
int main (int argc, char** argv)
{
 glutInit(&argc, argv);
 glutInitDisplayMode(GLUT_SINGLE | GLUT_RGB);
 // giving window size in X- and Y- direction
 glutInitWindowSize(640, 480);
 glutInitWindowPosition(0, 0);
 // Giving name to window
 glutCreateWindow("Circle Drawing");
 myInit();
 glutDisplayFunc(display);
 glutMainLoop();
}

output:

source : Detail on how to install OpenGL in codeblocks for windows

Install OpenGL on windows in Code::Blocks

1. Download code block and install it
2. Go to the link and download zip file from the download link that appears after freeglut MinGW package with having link name as Download freeglut 3.0.0 for MinGW and extract it.
3. Open notepad with run as administrator and open file from
   1. This PC > C:(C-drive) > Program Files(x86) > CodeBlocks > share > CodeBlocks > templates, (then click to show All Files)
   2. Next, open glut.cbp and and search all glut32 and replace with freeglut.
   3. Then, open from This PC > C:(C-drive) > Program Files(x86) > CodeBlocks > share > CodeBlocks > templates > wizard > glut (then click to show All Files)
   4. Open wizard.script and here, also replace all glut32 with freeglut 
4. Then go to freeglut folder (where it was downloaded) and
   1. Include > GL and copy all four file from there
   2. Go to This PC > C:(C-drive) > Program Files(x86) > CodeBlocks > MinGW > include > GL and paste it.
   3. Then, from download folder freeglut > lib, copy two files and go to This PC > C:(C-drive) > Program Files(x86) > CodeBlocks > MinGW > lib and paste it.
   4. Again go to downloaded folder freeglut > bin and copy one file (freeglut.dll) from here and go to This PC > C:(C-drive) > Windows > SysWOW64 and paste this file.
5. Now open Code::Blocks.
   1. Select File > New > Project > GLUT project > Next.
   2. Give project title anything and then choose Next.
   3. For selecting GLUT’s location : This PC > C:(C-drive) > Program Files(x86) > CodeBlocks > MinGW.
   4. Press OK > Next > Finish.

Now, Code::Blocks is ready to test for OpenGL File

NOTE: Once you save your file in the GLUT project in codeblocks, comment the main() method of the 'main.cpp' file, because there can be only one main() method i.e. the one in your C file.

source : https://www.geeksforgeeks.org/getting-started-with-opengl/

JavaScript: How to check if a checkbox is checked

https://stackoverflow.com/questions/9887360/how-can-i-check-if-a-checkbox-is-checked

JavaScript: Making sure at least one checkbox is checked

https://stackoverflow.com/questions/11787665/making-sure-at-least-one-checkbox-is-checked

Hemant Jain's Github repository on Data Structures

His book Problem Solving in Data Structures & Algorithms Using Python: Programming Interview Guide by Hemant Jain

Count and Percentage in Column chart in MS Excel

https://www.listendata.com/2016/06/count-and-percentage-in-column-chart.html

Python 'Statistics' module and 'Numpy' statistical functions

Python statistics module https://www.tutorialsteacher.com/python/statistics-module

Python NumPy statistical functions https://www.tutorialspoint.com/numpy/numpy_statistical_functions.htm

Polynomial time and exponential time complexity

Polynomial time and exponential time   https://stackoverflow.com/questions/4317414/polynomial-time-and-exponential-time

How to modify values in a existing table

The update statement in SQL https://www.zentut.com/sql-tutorial/sql-update/

From validation using JavaScript and HTML form tag.

Form validation using JavaScript example

https://www.javatpoint.com/javascript-form-

http://www.easywayserver.com/jsp/JSP-form-validation.htm

https://www.html.am/html-codes/forms/html-checkbox-code.cfm

https://stackoverflow.com/questions/18849200/form-validation-in-jsp-using-javascript/18849395

How to remove the 'Unable to load authentication plugin 'caching_sha2_password' issue in Netbeans while connecting to MySQL 8.0.19

The newer versions of MySQL default to caching_sha2_password. If you want to disable it then follow below steps

1. Login into your MYSQL console as root user like below.

eg mysql -uYOUR_ROOT_USER_NAME -pYOUR_ROOT_USER_PASSWORD

2. Then execute the command by replacing YOUR_ROOT_USER_NAME and YOUR_ROOT_USER_PASSWORD

ALTER USER 'YOUR_ROOT_USER_NAME'@'localhost' IDENTIFIED WITH mysql_native_password BY 'YOUR_ROOT_USER_PASSWORD';

You will no longer get any 'caching_sha2_password' exception while connecting for any client after this.

Source:
https://stackoverflow.com/questions/50193771/unable-to-load-authentication-plugin-caching-sha2-password

Downloading and adding the latest JDBCDriver in your Netbeans project

See my stackoverflow answer https://stackoverflow.com/questions/46131295/classcastexception-java-math-biginteger-cannot-be-cast-to-java-lang-long-on-con/60780362#60780362

You can get the latest mysqljdbcdriver by downloading this MySQL-connector-java-5.1.48.zip file from here https://dev.mysql.com/downloads/connector/j/5.1.html

Notation for representing FDs( Functional Dependencies)

Identify-functional-dependencies

LISP programs

https://rahulkumarsaurabh.blogspot.com/search/label/LISP%20Program has a few good LISP programs.

Online LISP compiler https://rextester.com/l/common_lisp_online_compiler

Predicate Calculus

https://www.zweigmedia.com/RealWorld/logic/logic7.html

AI

https://m.youtube.com/playlist?list=PLr3OnN7Kdzeh0xHH_OaEzzk21vn6LIrw1

LISP and PROLOG online compilers

Lisp https://www.tutorialspoint.com/execute_lisp_online.php

Prolog https://www.tutorialspoint.com/execute_prolog_online.php

Forward and Backward chaining

Forward and Backward Chaining: https://www.javatpoint.com/forward-chaining-and-backward-chaining-in-ai

Unification and Resolution on FOL in AI

Unification: https://www.javatpoint.com/ai-unification-in-first-order-logic

Resolution: https://www.javatpoint.com/ai-resolution-in-first-order-logic

Resolution method in FOL

Explanation of the resolution method of FOL and example.
https://www.youtube.com/watch?v=C_iqWGOhvak&list=PLrjkTql3jnm_yol-ZK1QqPSn5YSg0NF9r&index=36&app=desktop

Heuristic in AI

What is the Heuristic in AI https://www.youtube.com/watch?v=5F9YzkpnaRw

Hill Climbing

Hill climbing algorithm https://www.youtube.com/watch?v=3SiWtAnUROs

AI Search methods for problem solving: IIT Madras

Search Methods for problem solving https://www.youtube.com/watch?v=XCPZBD9lbVo&list=PLbMVogVj5nJQu5qwm-HmJgjmeGhsErvXD

Using Simulated Annealing to solve TSM

YouTube lecture Simulated Annealing and Genetic algorithms to TSM
https://www.youtube.com/watch?time_continue=42&v=0rPZSyTgo-w&feature=emb_logo

Python code for simulated annealing solution to TSM
https://raw.githubusercontent.com/goossaert/algorithms/master/simulated_annealing/annealing.py

Heuristic search methods
https://www.youtube.com/watch?v=dtGRmhZ6Cuo&list=PLbMVogVj5nJQu5qwm-HmJgjmeGhsErvXD&index=9

What is Simulated Annealing? what's the pseudocode?
https://en.wikipedia.org/wiki/Simulated_annealing

Simulated Annealing lecture IIT Kh
https://www.youtube.com/watch?v=TC9WNwM2noM

Parallel programs in C/C++

OpenMP(Open Multiprocessing) parallel programs in C 

https://people.sc.fsu.edu/~jburkardt/c_src/openmp/openmp.html

Matrix-Matrix multiplication
Ex 1. https://www.appentra.com/parallel-matrix-matrix-multiplication/
Ex 2. https://computing.llnl.gov/tutorials/openMP/samples/C/omp_mm.c


OpenMP parallel programs in C++
https://people.sc.fsu.edu/~jburkardt/cpp_src/openmp/openmp.html


Parallel Computing in C++
 https://www.cs.cmu.edu/~15210/pasl.html

MPI programs in C

Estimating Pi using MPI programming in C
https://gribblelab.org/CBootCamp/A2_Parallel_Programming_in_C.html#orgad28152

MPI tutorial https://computing.llnl.gov/tutorials/mpi/

GATE2020 syllabus

http://gate.iitd.ac.in/syllabi.php

OpenMP program for Matrix multiplication

Matrix multiplication with openMp shared memory parallel programming https://www.youtube.com/watch?v=K84-zInk_ec&app=desktop

NPTEL's Introduction to parallel programming in OpenMP https://www.youtube.com/watch?v=a8R784VtXBg&list=PLJ5C_6qdAvBFMAko9JTyDJDIt1W48Sxmg&app=desktop

Traveling salesman problem: iterative implementation in Java

Also available at  git repository https://github.com/topics/graph-theory

Video  https://m.youtube.com/watch?v=udEe7Cv3DqU