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.

Java chatGpt Note: Java program to write to console using buffered writer

 import java.io.BufferedWriter;

import java.io.IOException;

import java.io.OutputStreamWriter;

public class ConsoleWriterExample {

    public static void main(String[] args) {

        try {

            // Create a BufferedWriter that writes to the console

            BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(System.out));

            // Write some text to the console

            writer.write("Hello, world!");

            writer.newLine();

            writer.write("This is an example of writing to the console using a BufferedWriter.");

            writer.newLine();

            // Flush the buffer to make sure all text is written to the console

            writer.flush();

        } catch (IOException e) {

            e.printStackTrace();

        }

    }

}

Ubuntu Notes: Error /var/cache/debconf/config.dat is locked by another process: Resource temporarily unavailable

To solve this bug in terminal: 

sudo fuser -v /var/cache/debconf/config.dat

Get the PID then

sudo kill <PID> 

If not successfull, then

sudo kill -9 <PID>

Bike notes from chatGpt: Good 100cc bike for 6feet tall

If you are 6 feet tall and looking for a 100cc bike, here are a few options that you can consider:

1. Bajaj Platina 100: The Bajaj Platina 100 is a popular choice among tall riders. It has a comfortable riding position, with a long and wide seat that provides ample space for the rider. The bike also has good suspension, which makes for a smooth ride.

2. Hero Passion Pro: The Hero Passion Pro is another good option for tall riders. It has a comfortable riding position, with a long and wide seat that provides ample space for the rider. The bike also has good suspension, which makes for a smooth ride.

3. Honda CD 110 Dream: The Honda CD 110 Dream is a stylish and comfortable bike that is well-suited for tall riders. It has a long and wide seat that provides ample space for the rider, and good suspension that makes for a smooth ride.

4. TVS Radeon: The TVS Radeon is a comfortable and stylish bike that is ideal for tall riders. It has a long and wide seat that provides ample space for the rider, and good suspension that makes for a smooth ride.

It is important to note that these bikes have different features and specifications, so it is recommended that you test ride them to see which one suits you best. Additionally, you should consider your budget, riding style, and requirements before making a final decision.

Bike notes from chatGpt: What would be better for me 100cc or 125cc or 150cc or 200cc bike?

 The choice between a 100cc, 125cc, 150cc, or 200cc bike depends on various factors such as your riding requirements, budget, and personal preferences. Here are some general guidelines that can help you choose the right bike:

1. 100cc bikes are ideal for short commutes and city riding. They are fuel-efficient, affordable, and easy to handle, making them a good choice for beginners or riders on a budget.

2. 125cc bikes offer a bit more power than 100cc bikes, making them suitable for longer commutes and occasional highway riding. They also offer better acceleration and are more comfortable to ride for longer periods.

3. 150cc bikes are more powerful than 100cc and 125cc bikes, making them suitable for riders who want a bit more speed and acceleration. They are good for both city and highway riding, but they are generally more expensive than smaller bikes.

4. 200cc bikes are the most powerful among the options you mentioned, and they are suitable for riders who want a lot of speed and acceleration. They are good for highway riding and long commutes, but they can be more expensive to maintain and insure than smaller bikes.

Ultimately, the choice between a 100cc, 125cc, 150cc, or 200cc bike depends on your personal preferences, budget, and riding requirements. You should test ride different bikes to see which one feels most comfortable and suits your needs the best.