C vs Cpp notes: gBard ans - more library, documentations for learning available in internet for c vs cpp

 There are more libraries and documentations available for C++ than for C. This is because C++ is a more popular language than C, and it has been around for longer. There are also more developers who use C++, which means that there is more demand for libraries and documentations.

Here are some of the most popular libraries and documentations for C++:

• The C++ Standard Library is a collection of classes, functions, and objects that are part of the C++ language. It provides a wide range of functionality, including:
  • Input and output
  • Memory management
  • Strings
  • Mathematics
  • Containers
  • Algorithms
• Boost is a free and open-source library that provides a wide range of additional functionality for C++. It includes libraries for:
  • Numerical analysis
  • Threading
  • GUI development
  • Networking
  • Data compression
• Qt is a cross-platform framework for GUI development. It provides a wide range of widgets and features, and it is used by many popular applications, such as Firefox and VLC.
• Google Test is a unit testing framework for C++. It is easy to use and provides a wide range of features, such as:
  • Assertions
  • Fixtures
  • Parameterized tests
• Doxygen is a documentation generator for C++. It can be used to generate HTML, LaTeX, and other formats from C++ source code.

Here are some of the most popular documentations for C++:

• The C++ Programming Language by Bjarne Stroustrup is the definitive reference for C++. It covers the entire language, from the basics to the advanced features.
• The C++ Standard Library by Nicolai Josuttis is a comprehensive guide to the C++ Standard Library. It covers all of the classes, functions, and objects in the library.
• Effective C++ by Scott Meyers is a collection of tips and techniques for writing better C++ code. It covers a wide range of topics, such as:
  • Memory management
  • Object-oriented programming
  • Generic programming
• C++ Coding Standards: 101 Rules, Guidelines, and Best Practices by Herb Sutter is a collection of coding standards for C++. It covers a wide range of topics, such as:
  • Naming conventions
  • Style guidelines
  • Error handling

Overall, there are more libraries and documentations available for C++ than for C. This is because C++ is a more popular language than C, and it has been around for longer. There are also more developers who use C++, which means that there is more demand for libraries and documentations.

Ubuntu Java Tomcat Notes: Systemctl command to install tomcat

 1. Download tomcat and save it to /opt/tomcat

2. change permission of all files in /opt/tomcat/bin directory to +x

chmod +x /opt/tomcat/bin/

3. sudo vim /etc/systemd/system/tomcat.service

[Unit]

Description=Tomcat Web Application Container

After=network.target multi-user.target

[Service]

Type=forking

User=username #replace with your username

Group=username #replace with your groupname

Environment="CATALINA_BASE=/opt/tomcat"

Environment="CATALINA_HOME=/opt/tomcat"

Environment="CATALINA_TMPDIR=/opt/tomcat/temp"

Environment="JRE_HOME=/home/newmkg/.sdkman/candidates/java/current"

Environment="JAVA_HOME=/home/newmkg/.sdkman/candidates/java/current"

Environment="CLASSPATH=/opt/tomcat/bin/bootstrap.jar:/opt/tomcat/bin/tomcat-juli.jar"

ExecStart=/opt/tomcat/bin/startup.sh

ExecStop=/opt/tomcat/bin/shutdown.sh

Restart=on-failure

[Install]

WantedBy=multi-user.target

-------------------

4. run commands to start tomcat

sudo systemctl daemon-reload;

sudo systemctl enable tomcat.service;

sudo systemctl start tomcat.service;

5. check status of tomcat

sudo systemctl status tomcat.service;

6. in case of issue try to restart tomcat via systemctl commant

sudo systemctl restart tomcat.service;

7. Is issue not resolved, run commands

sudo systemctl stop tomcat.service;

sudo systemctl disable tomcat.service;

sudo systemctl daemon-reload.service;

8. Then delete /opt/tomcat & repeat steps 1-6 above

GBrad Ans for Hibernate vs JDBC

 JDBC and Hibernate are both Java frameworks that are used to connect to and interact with databases. JDBC is a lower-level framework that provides direct access to the database, while Hibernate is a higher-level framework that provides an object-relational mapping (ORM) layer.

JDBC

JDBC is a standard API that is part of the Java SE platform. It provides a set of classes and interfaces that can be used to connect to and interact with databases. JDBC is a lower-level framework that provides direct access to the database. This means that you have more control over the database, but it also means that you have to write more code.

Hibernate

Hibernate is an open-source ORM framework. It provides a higher-level abstraction over JDBC that makes it easier to interact with databases. Hibernate takes care of the mapping between Java objects and database tables, so you don't have to write as much code.

Which one should you use?

The choice of whether to use JDBC or Hibernate depends on your needs. If you need more control over the database, then you should use JDBC. If you want an easier and more declarative way to interact with databases, then you should use Hibernate.

Here is a table that summarizes the pros and cons of JDBC and Hibernate:

Feature	JDBC	Hibernate
Level of abstraction	Lower	Higher
Control over database	More	Less
Ease of use	Less	More
Declarative mapping	No	Yes
Support for multiple databases	Yes	Yes
Community support	Large	Large

Ultimately, the best way to decide which framework to use is to try both and see which one you prefer.