c++ ERROR: nullptr was not declared in this scope

https://stackoverflow.com/questions/10033373/c-error-nullptr-was-not-declared-in-this-scope-in-eclipse-ide 

Try another version of the gcc compiler or use NULL instead.

Linking header files in Codeblocks IDE.

https://stackoverflow.com/questions/15146788/linking-header-files-in-codeblocks 

JSP: Deployment error: Starting of Tomcat failed, the shutdown port 8005 is already in use. See the server log for details.

Change the shutdown port number to maybe 8006 or 8004. 

Worked for me Change it at NetBeans at tools->servers->shutdown port 

https://stackoverflow.com/questions/46266986/starting-of-tomcat-failed-the-shutdown-port-8005-is-already-in-use

Levels of measurement in Machine learning.

link https://www.scribbr.com/statistics/levels-of-measurement

Top 5 index stocks

1. Nifty 
2. Banknifty
3. RIL
4. ICICI
   
5. TCS
6. M&M
   
7. TISCO
   

The difference between travelling salesman problem and finding shortest path.

 what-is-the-difference-between-travelling-salesman-and-finding-shortest-path