Vi Editor

VI EDITOR

Move

move in the editor: h right j up k  down l left

move top shift +g

gg down the line of the file

:8 go to line 8

search

/string - search

n keyword to search next

capital N to search previous

? for backward

delete operation

d+w - delete word

Undo/Redo

u undo / cntrl +r redo

Copy Operation

word

yw -copy

p - paste

:10 jump to 10th line

:2 jump to 2nd line

set line number

set number 

to remove line number

set nonu

to make permanent line numbers

e ~/vimrc

vim sample.txt +8

vim sample.txt +/search text

vim +1,2d,wq sample.txt  - d for delete

delete 1 to 2 lines and save

vim +4d,wq sample.txt  - d for delete

it will delete 4th line

vim -d r1.txt r2.txt

In the "Diff mode" video, here are the key takeaways:

• Using Diff Mode: You can compare two versions of a file using Vim's built-in diff mode with the -d switch (e.g., vim -d file1.txt file2.txt).
• Navigating Differences: Move between the windows showing differences using Control + W + W.
• Copying Changes: Use D + O to copy a line from one file to another and D + P to put a line from one file to another.
• Vertical Split: You can set Vim to show differences in a vertical split by using :vert diffsplit file2.txt and making it persistent by adding set diffopt+=vertical to your .vimrc file.

MakeFile Tutorial

refer the abovelink
 

Type Casting in C++

static_cast

 

Difference Between Reference And Pointers In C++

 This is a good video to refer to learn Difference Between Reference And Pointers In C++

Difference Between Reference And Pointers In C++

Game Engines and Frameworks Using C++

 Game Engines and Frameworks Using C++

Several game engines and frameworks utilize C++:

• Unreal Engine: One of the most popular game engines, which provides a great number of tools and options for creating games with very high quality. C++ programming for the Unreal Engine is offered at Coursera as a specialization for learners with prior programming experience.
• Cocos2d-x: A cross-platform, C++-based, open-source framework for 2D game development for multiple platforms.
• Irrlicht Engine: A free C++ 3D game engine described as small and fast.
• raylib: A C library developed specifically for game programming and inherently really simple to use, thus should be easy for newbies.

Learning Resources
To further enhance C++ game development skills, consider the following resources:

• Make a C++ Game – Full Course": A comprehensive YouTube tutorial guiding through the steps of creating a game in C++ from scratch.
• Creating a Game Engine with C++ and OpenGL": A step-by-step guide on developing a basic game engine using C++ and OpenGL, covering environment setup, graphics rendering, and game logic.

Conclusion
C++ programming language is still widely used in game development to provide the necessary level of speed and flexibility for creating really good, effective, and complex games. As a result, C++ accompanies precious assets and solutions that help newcomers build attractive and optimized games without having to develop all the functions from scratch.

English proficiency tests IELTS, TOEFL: Reading these books can help you crack the exam

 Books can help in more ways than one. For example, they can take your vocabulary to the next level

Books can be our best friends, it's not for nothing that this saying is popular. Here are a few classics and what they can teach you when it comes to English language 

Lord of the Flies

BY William Golding

Often prescribed as curriculum in school, this book is a modern novel using descriptive and dramatic language that helps a reader visualise the story

Animal Farm

BY George Orwell

Simple language drives this novel. This story is short and effective, giving the reader an understanding on how to use language in a clever way

To Sir, With Love

BY ER Braithwaite

The story is about how a professor wins over the hearts of unruly students. The words and characterisation will surely teach you a thing or two too

The Curious Incident of the Dog in the Night-Time

BY Mark Haddon

A heart-warming tale of an autistic kid and a dog who set out to solve a murder mystery. The perspective of the world that the kid, Christopher, has is charming

The Old Man and the Sea

BY Ernest Hemingway

Written by journalist Ernest Hemingway, the book has language that is clear, straight forward and factually tight. The sentence structure is short, making it easy to follow

send XML data

If you want to send XML data to another service internally, you can use a variety of communication methods depending on your system architecture and the technologies you are working with. Here are some common approaches:

1. HTTP/HTTPS Requests:

   • Description: You can send XML data to another service internally using HTTP or HTTPS requests.
   • How: Use a library in your programming language of choice to make HTTP requests. Include the XML data as the request body.
   • Example: In Python, you might use the requests library to send a POST request with an XML payload.

     python
     import requests
     
     url = "http://internal-service/api/endpoint"
     headers = {"Content-Type": "application/xml"}
     xml_data = """
     <book>
         <title>The Great Gatsby</title>
         <author>F. Scott Fitzgerald</author>
         <year>1925</year>
         <genre>Fiction</genre>
     </book>
     """
     response = requests.post(url, data=xml_data, headers=headers)
     
     print(response.status_code)
     print(response.text)
     

2. Message Queues:

   • Description: You can use a message queue to send XML data as messages to another service.
   • How: Send XML data as messages to the queue, and the other service can consume the messages from the queue.
   • Example: In Python, you might use the pika library to interact with RabbitMQ and send XML data as messages.

     python
     import pika
     
     connection = pika.BlockingConnection(pika.ConnectionParameters('localhost'))
     channel = connection.channel()
     
     channel.queue_declare(queue='book_queue')
     
     xml_data = """
     <book>
         <title>The Great Gatsby</title>
         <author>F. Scott Fitzgerald</author>
         <year>1925</year>
         <genre>Fiction</genre>
     </book>
     """
     
     channel.basic_publish(exchange='',
                           routing_key='book_queue',
                           body=xml_data)
     connection.close()
     

3. Remote Procedure Call (RPC):

   • Description: You can use RPC mechanisms to send XML data to another service internally.
   • How: Use an RPC library or framework to make a call to the remote service, passing XML data as an argument.
   • Example: In gRPC, you might define a service method that accepts XML data as input.

4. Inter-Process Communication (IPC):

   • Description: You can use IPC mechanisms to send XML data between different processes.
   • How: Use methods such as sockets, shared memory, or named pipes to communicate and pass XML data.
   • Example: In Python, you might use a socket connection to send XML data to another process.