Computer Science and Programming

30 Mar 2024 22:24

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Computer Science and Programming

27 Mar 2024 18:21

𝗗𝗶𝗱 𝗜 𝗴𝗶𝘃𝗲 𝗺𝘆 𝗯𝗲𝘀𝘁 𝗹𝗮𝘀𝘁 𝘄𝗲𝗲𝗸?

There are no two same days nor two same weeks

The "best" can mean different on "different" days

This is why we need to have weekly and monthly goals

And the results are that matters, not the effort

I wish you a great week ahead 👋

Computer Science and Programming

26 Mar 2024 18:41

𝗛𝗼𝘄 𝘁𝗼 𝘂𝘀𝗲 𝘂𝗻𝗱𝗼𝗰𝘂𝗺𝗲𝗻𝘁𝗲𝗱 𝗪𝗲𝗯 𝗔𝗣𝗜𝘀?

There are several methods to tackle this issue, primarily involving intercepting traffic originating from a web API. If the goal is to intercept HTTP/HTTPS traffic from various sources, one approach involves manually constructing a custom sniffer. However, this method can be burdensome as it requires tailoring the solution for each API individually.

Now, Postman offers a solution to sniff traffic from any API with the HTTP/HTTP protocol. What is good about this feature is that traffic capture enables you to generate a Postman collection, which you can then use to test, evaluate, and document captured APIs.

Check more at the following link:

🔗https://blog.postman.com/introducing-postman-new-improved-system-proxy/.

Computer Science and Programming

25 Mar 2024 14:38

Implementing RSA in Python from Scratch

🔗https://coderoasis.com/implementing-rsa-from-scratch-in-python/https://coderoasis.com/implementing-rsa-from-scratch-in-python/

Computer Science and Programming

17 Mar 2024 14:20

𝗚𝗶𝘁 𝗠𝗲𝗿𝗴𝗲 𝘃𝘀 𝗥𝗲𝗯𝗮𝘀𝗲

One of the most powerful Git features is branching. Yet, while working with it, we must integrate changes from one branch into another. The way how to do this can be different.

We have two ways to do it:

𝟭. 𝗠𝗲𝗿𝗴𝗲

When you merge Branch A into Branch B (with 𝚐𝚒𝚝 𝚖𝚎𝚛𝚐𝚎), Git creates a new merge commit. This commit has two parents, one from each branch, symbolizing the confluence of histories. It's a non-destructive operation, preserving the exact history of your project, warts, and all. Merges are particularly useful in collaborative environments where maintaining the integrity and chronological order of changes is essential. Yet, merge commits can clutter the history, making it harder to follow specific lines of development.

𝟮. 𝗥𝗲𝗯𝗮𝘀𝗲

When you rebase Branch A onto Branch B (with 𝚐𝚒𝚝 𝚛𝚎𝚋𝚊𝚜𝚎), you're essentially saying, "Let's pretend these changes from Branch A were made on top of the latest changes in Branch B." Rebase rewrites the project history by creating new commits for each commit in the original branch. This results in a much cleaner, straight-line history. Yet, it could be problematic if multiple people work on the same branch, as rebasing rewrites history, which can be challenging if others have pulled or pushed the original branch.

So, when to use them:

🔹 𝗨𝘀𝗲 𝗺𝗲𝗿𝗴𝗶𝗻𝗴 𝘁𝗼 𝗽𝗿𝗲𝘀𝗲𝗿𝘃𝗲 𝘁𝗵𝗲 𝗰𝗼𝗺𝗽𝗹𝗲𝘁𝗲 𝗵𝗶𝘀𝘁𝗼𝗿𝘆, especially on shared branches or for collaborative work. It's ideal for feature branches to merge into a main or develop branch.

🔹 𝗨𝘀𝗲 𝗿𝗲𝗯𝗮𝘀𝗶𝗻𝗴 𝗳𝗼𝗿 𝗽𝗲𝗿𝘀𝗼𝗻𝗮𝗹 𝗯𝗿𝗮𝗻𝗰𝗵𝗲𝘀 or when you want a clean, linear history for easier tracking of changes. Remember to rebase locally and avoid pushing rebased branches to shared repositories. Also, be aware 𝗻𝗼𝘁 𝘁𝗼 𝗿𝗲𝗯𝗮𝘀𝗲 𝗽𝘂𝗯𝗹𝗶𝗰 𝗵𝗶𝘀𝘁𝗼𝗿𝘆. If your branch is shared with others, rebasing can rewrite history in a way that is disruptive and confusing to your collaborators.

Computer Science and Programming

16 Mar 2024 13:28

𝗗𝗼 𝘆𝗼𝘂 𝘀𝘂𝗳𝗳𝗲𝗿 𝗳𝗿𝗼𝗺 𝗜𝗺𝗽𝗼𝘀𝘁𝗲𝗿 𝗦𝘆𝗻𝗱𝗿𝗼𝗺𝗲?

Always believing that you must know everything before doing?

Adjust your viewpoint.

Be a smart learner!

Computer Science and Programming

10 Mar 2024 20:03

Introducing - Azure Wallet

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Computer Science and Programming

07 Mar 2024 11:03

DevOps Explained!

Plan:
- Defines project goals, scope, and requirements, identifying stakeholders and resources. 📝
Build:
- Involves coding, compiling, and packaging, emphasizing version control and code management. 🔧
Test:
- Ensures software aligns with quality and functional standards, utilizing automated and security testing. 🧪
Deploy:
- Releases software precisely using deployment automation and monitoring tools. 🚚
Operate:
- Ensures operational stability, promptly addressing issues with management tools. 🛠
Observe:
- Analyzes data from software and production using logging, tracing, and metrics tools. 🔎
Continuous Feedback:
- Gathers ongoing feedback, utilizing loops, surveys, and analytics for improvement. 📊
DevOps:
- Cultivates a culture of collaboration, communication, and continuous improvement for faster, better, and safer software delivery.

Computer Science and Programming

03 Mar 2024 12:45

Computer Memory Explained

Computer memory is like a workspace for your computer. It stores data and instructions that the computer needs to access quickly.

Internal Memory:

1. ROM (Read-Only Memory):
- PROM (Programmable ROM): Programmable once by the user post-manufacturing. 🖊
- EPROM (Erasable Programmable ROM): Can be erased with ultraviolet light and reprogrammed. ☀️🔁
- EEPROM (Electrically Erasable Programmable ROM): Can be erased and reprogrammed electrically, multiple times. ⚡️

2. RAM (Random Access Memory):
- SRAM (Static RAM): Retains data as long as power is supplied, no need to refresh, faster than DRAM. ⚡️💨
- DRAM (Dynamic RAM): Stores data in capacitors that must be refreshed periodically, widely used. 🔄
- SDRAM (Synchronous DRAM): Syncs with CPU clock speed for improved performance. ⏱
- RDRAM (Rambus DRAM): High bandwidth memory with Rambus technology. 🚀
- DDR SDRAM (Double Data Rate SDRAM): Transfers data on both rising and falling clock edges.
- DDR1: First generation, higher speed and bandwidth than SDRAM. 🆕
- DDR2: Improved version of DDR1 with lower power consumption and higher speeds. 🔋💨
- DDR3: Higher speeds and reduced power consumption over DDR2. 🔋➕💨
- DDR4: Higher module density and increased performance with reduced voltage. 🔋🆙🎛

External Memory:

1. HDD (Hard Disk Drive): Uses spinning disks to read/write data, traditional storage device. 🔄💾
2. SSD (Solid State Drive): Non-volatile flash memory for faster speed than HDDs. 🚀💾
3. CD (Compact Disc): Optical disc for storing digital data, used for music and software

Computer Science and Programming

01 Mar 2024 14:13

DevOps is a set of practices that combines software development and IT operations. It aims to shorten the software development life cycle and provide continuous delivery with high software quality. 🚀

DevOps has several phases

Plan: This phase involves defining the goals, scope, and requirements of the software project. It also includes identifying the stakeholders, risks, and resources needed. 📝

Build: This phase involves writing, compiling, and packaging the code into executable units. It also includes using version control, code review, and configuration management tools. 🔧

Test: This phase involves verifying that the software meets the quality standards and functional specifications. It also includes using automated testing, performance testing, and security testing tools. 🧪

Deploy: This phase involves releasing the software to the production environment or to the end-users. It also includes using deployment automation, orchestration, and monitoring tools. 🚚

Operate: This phase involves running and maintaining the software in the production environment. It also includes using incident management, problem management, and change management tools. 🛠

Observe: This phase involves collecting and analyzing data from the software and the production environment. It also includes using logging, tracing, and metrics tools. 🔎

Continuous Feedback and Discovery: This phase involves gathering feedback from the stakeholders, users, and customers. It also includes using feedback loops, surveys, and analytics tools. It also involves discovering new opportunities, challenges, and trends. 📊

DevOps is a culture that promotes collaboration, communication, and continuous improvement. It helps to deliver software faster, better, and safer. 😊

Computer Science and Programming

23 Feb 2024 12:23

Ever wondered how Docker 🐳 works?

1. Docker Build 🏗
2. Docker Push ☁️
3. Docker Run 🏃
4. Docker Pull 🚚
5. Docker Images 🖼

Computer Science and Programming

22 Feb 2024 20:46

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Computer Science and Programming

16 Feb 2024 10:33

Improving API Performance with Database Connection Pooling

The diagram below shows 5 common API optimization techniques. Today, I’ll focus on number 5, connection pooling. It is not as trivial to implement as it sounds for some languages.

When fulfilling API requests, we often need to query the database. Opening a new connection for every API call adds overhead. Connection pooling helps avoid this penalty by reusing connections.

How Connection Pooling Works

1. For each API server, establish a pool of database connections at startup.
2. Workers share these connections, requesting one when needed and returning it after.

Challenges for Some Languages

However, setting up connection pooling can be more complex for languages like PHP, Python and Node.js. These languages handle scale by having multiple processes, each serving a subset of requests.

- In these languages, database connections get tied to each process.
- Connections can't be efficiently shared across processes. Each process needs its own pool, wasting resources.

In contrast, languages like Java and Go use threads within a single process to handle requests. Connections are bound at the application level, allowing easy sharing of a centralized pool.

Connection Pooling Solution

Tools like PgBouncer work around these challenges by proxying connections at the application level.

PgBouncer creates a centralized pool that all processes can access. No matter which process makes the request, PgBouncer efficiently handles the pooling.

At high scale, all languages can benefit from running PgBouncer on a dedicated server. Now the connection pool is shared over the network for all API servers. This conserves finite database connections.

Connection pooling improves efficiency, but its implementation complexity varies across languages.

Computer Science and Programming

08 Feb 2024 17:19

Monolithic VS Microservices Architecture. Which one are you using? 🤔

In the realm of software architecture, the choice between Monolithic and Microservices can shape the destiny of your application. Let's break down the key differences in a nutshell! 🧩

1. Monolithic Architecture 🏰

- One Big Castle: Monoliths are like a majestic castle, where all components (database, server, user interface) are tightly knit into a single structure.

- Unified & Simple: Easy to develop and deploy due to its unified structure. Changes are made in one place, making coordination a breeze.

- Scaling Challenges: Scaling can be a challenge. When one aspect needs upgrading, the entire application must be scaled, even if only a small part requires more resources.

2. Microservices Architecture 🌐

- City of Specialized Buildings: Microservices resemble a bustling city, with each service as a specialized building handling a distinct function.

- Scalability & Flexibility: Offers scalability on a per-service basis. If one part of the application needs more resources, you can scale just that service.

- Increased Complexity: As the number of services grows, managing the communication between them can become complex. Decentralization brings its own set of challenges.

Computer Science and Programming

01 Feb 2024 13:12

🌐 Public vs Internal Load Balancers: Unveiling the Power of Balance! 🔄

Load balancing is the unsung hero of seamless digital experiences, and choosing between public and internal load balancers can be a game-changer. Let's dive into the key differences in a nutshell! 🚀

🌍 Public Load Balancers:
- Audience: Everyone, Everywhere!
- Designed to distribute incoming traffic across public-facing servers.
- Ideal for applications accessible over the internet, such as websites or APIs.
- Acts as the gateway, directing external requests to the right internal resources.

🏢 Internal Load Balancers:
- Keep it in the Family:
- Tailored for distributing traffic within a private network or data center.
- Perfect for applications serving internal users or specific services behind the scenes.
- Enhances security by keeping sensitive systems shielded from the public eye.

🤔 How to Choose?
- Public:
- Opt for when your services need to be accessible from the internet.
- Ideal for handling high volumes of external traffic.
- Best suited for public-facing applications like websites or APIs.

Computer Science and Programming

28 Mar 2024 10:02

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Computer Science and Programming

27 Mar 2024 17:05

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Computer Science and Programming

25 Mar 2024 17:02

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Computer Science and Programming

22 Mar 2024 13:28

𝗧𝗵𝗲 𝗕𝗲𝘀𝘁 𝗦𝗼𝗳𝘁𝘄𝗮𝗿𝗲 𝗔𝗿𝗰𝗵𝗶𝘁𝗲𝗰𝘁𝘂𝗿𝗲 𝗕𝗼𝗼𝗸𝘀 𝗜𝗻 𝗘𝘃𝗲𝗿𝘆 𝗖𝗮𝘁𝗲𝗴𝗼𝗿𝘆

Check out this list of all books tagged with software architecture. They are ranked based on Goodreads score with applied simple algorithmic rules (relevant to software architecture, content is not obsolete, it must be tech agnostic, and average rating > 3.5). Rating is based on the number of written reviews, including the average rating, the number of ratings, and the publishing date.

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Computer Science and Programming

16 Mar 2024 17:06

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Computer Science and Programming

13 Mar 2024 13:12

𝗟𝗲𝗮𝗿𝗻 𝗳𝘂𝗻𝗱𝗮𝗺𝗲𝗻𝘁𝗮𝗹𝘀, 𝗻𝗼𝘁 𝗳𝗿𝗮𝗺𝗲𝘄𝗼𝗿𝗸𝘀

Have you ever wondered why some technologies are still with us, and some disappeared? Here is 𝘁𝗵𝗲 𝗟𝗶𝗻𝗱𝘆 𝗘𝗳𝗳𝗲𝗰𝘁 to explain it. This effect tells me that 𝗯𝘆 𝘁𝗵𝗲 𝘁𝗶𝗺𝗲 𝗜 𝗿𝗲𝘁𝗶𝗿𝗲, 𝗱𝗲𝘃𝗲𝗹𝗼𝗽𝗲𝗿𝘀 𝘄𝗶𝗹𝗹 𝘀𝘁𝗶𝗹𝗹 𝗯𝗲 𝘂𝘀𝗶𝗻𝗴 𝗖# 𝗮𝗻𝗱 𝗦𝗤𝗟. It is a concept in technology and innovation that suggests that the future life expectancy of a non-perishable item is proportional to its current age. In other words, the longer an item has been in use, the longer it is likely to continue to be used.

The concept was named after Lindy's Deli in New York City, where Nassim Nicholas Taleb popularized it in his book "𝗧𝗵𝗲 𝗕𝗹𝗮𝗰𝗸 𝗦𝘄𝗮𝗻." According to Taleb, the Lindy effect applies to many things, including technologies, ideas, and cultures, and evaluates their potential longevity.

In software development, we see that 𝗳𝗿𝗮𝗺𝗲𝘄𝗼𝗿𝗸𝘀 𝗰𝗼𝗺𝗲 𝗮𝗻𝗱 𝗴𝗼, 𝗯𝘂𝘁 𝗹𝗮𝗻𝗴𝘂𝗮𝗴𝗲𝘀 𝘀𝘂𝗰𝗵 𝗮𝘀 𝗦𝗤𝗟 𝗼𝗿 𝗖# 𝗮𝗻𝗱 𝗰𝗼𝗻𝗰𝗲𝗽𝘁𝘀 𝘀𝘂𝗰𝗵 𝗮𝘀 𝗢𝗯𝗷𝗲𝗰𝘁-𝗼𝗿𝗶𝗲𝗻𝘁𝗲𝗱 𝗽𝗿𝗼𝗴𝗿𝗮𝗺𝗺𝗶𝗻𝗴 𝗼𝗿 𝗦𝗢𝗟𝗜𝗗 𝗽𝗿𝗶𝗻𝗰𝗶𝗽𝗹𝗲𝘀 𝘀𝘁𝗮𝘆. All the energy I put into learning those technologies 10-15 years ago continues to support my work today. Some things changed, but the fundamentals stayed and even got better.

So, try to 𝗹𝗲𝗮𝗿𝗻 𝘁𝗵𝗶𝗻𝗴𝘀 𝘁𝗵𝗮𝘁 𝗱𝗼𝗻'𝘁 𝗰𝗵𝗮𝗻𝗴𝗲 (quote from Jeff Bezos). Focus on foundations, not frameworks. I've been doing this for two decades now.

Computer Science and Programming

10 Mar 2024 16:28

UNTANGLE Spring Security Architecture 🔒

Authentication and Authorization:
- Validates user identity and orchestrates controlled resource access.
- Empowers comprehensive user authentication and nuanced authorization.

Security Filters:
- Intercepts incoming requests, meticulously enforcing security measures.
- Offers a flexible, layered security filter chain for diverse protection strategies.

Custom Authentication Providers:
- N Authentication Provider: Extends authentication capabilities beyond default configurations. Facilitates tailored authentication strategies and seamless integration.
- DaoAuthentication Provider: Adopts a database-backed approach for user authentication. Scrutinizes user credentials against stored records, heightening security.

Authentication Manager:
- Orchestrates the authentication process, coordinating various authentication providers.
- Serves as a pivotal component in managing user identity verification.

Token-based Security (JWT):
- Implements advanced token-based authentication for stateless communication.
- Facilitates secure interaction without the need for server-side storage.

Session Management:
- Efficiently manages user sessions, mitigating session-related risks.
- Provides adaptability for session creation, tracking, and invalidation.

Authentication Tokens:
- Username Password Authentication Token:Represents user credentials for authentication purposes.
- Leverages usernames and passwords for robust user verification.

Add/Remove Authentication Token:
- Dynamically enables the addition and removal of authentication tokens.
- Ensures real-time control over user authentication, promoting flexibility.

Computer Science and Programming

05 Mar 2024 10:12

How Git Works - From Working Directory to Remote Repository

[1]. Working Directory:
Your project starts here. The working directory is where you actively make changes to your files.
[2]. Staging Area (Index):
After modifying files, use git add to stage changes. This prepares them for the next commit, acting as a checkpoint.
[3]. Local Repository:
Upon staging, execute git commit to record changes in the local repository. Commits create snapshots of your project at specific points.
[4]. Stash (Optional):
If needed, use git stash to temporarily save changes without committing. Useful when switching branches or performing other tasks.
[5]. Remote Repository:
The remote repository, hosted on platforms like GitHub, is a version of your project accessible to others. Use git push to send local commits and git pull to fetch remote changes.
[6]. Remote Branch Tracking:
Local branches can be set to track corresponding branches on the remote. This eases synchronization with git pull or git push.

Computer Science and Programming

01 Mar 2024 19:02

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Computer Science and Programming

27 Feb 2024 11:19

18 Most common used Java List methods

1. add(E element) - Adds the specified element to the end of the list.
2. addAll(Collection<? extends E> c) - Adds all elements of the specified collection to the end of the list.
3. remove(Object o) - Removes the first occurrence of the specified element from the list.
4. remove(int index) - Removes the element at the specified position in the list.
5. get(int index) - Returns the element at the specified position in the list.
6. set(int index, E element) - Replaces the element at the specified position in the list with the specified element.
7. indexOf(Object o) - Returns the index of the first occurrence of the specified element in the list.
8. contains(Object o) - Returns true if the list contains the specified element.
9. size() - Returns the number of elements in the list.
10. isEmpty() - Returns true if the list contains no elements.
11. clear() - Removes all elements from the list.
12. toArray() - Returns an array containing all the elements in the list.
13. subList(int fromIndex, int toIndex) - Returns a view of the portion of the list between the specified fromIndex, inclusive, and toIndex, exclusive.
14. addAll(int index, Collection<? extends E> c) - Inserts all elements of the specified collection into the list, starting at the specified position.
15. iterator() - Returns an iterator over the elements in the list.
16. sort(Comparator<? super E> c) - Sorts the elements of the list according to the specified comparator.
17. replaceAll(UnaryOperator<E> operator) - Replaces each element of the list with the result of applying the given operator.
18. forEach(Consumer<? super E> action) - Performs the given action for each element of the list until all elements have been processed or the action throws an exception.

Computer Science and Programming

23 Feb 2024 09:59

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If the topic of your post fits our channel, we will publish it with pleasure.

Computer Science and Programming

20 Feb 2024 18:29

If you design complex systems, you'll love sequence diagrams

Complex system architectures can quickly become tangled and hard to follow. Enter sequence diagrams! They keep your design neat and easily understandable.

For example, check out the diagram below. It depicts a client/server interaction, clearly differentiating between a cache hit and a cache miss. This is a prime example of how visual aids simplify complex interactions.

Sequence diagrams are a must when you aim to:

- 🚀 Map out end-to-end system workflows.
- 🔍 Clarify interactions between components.
- 📚 Produce clear and concise documentation.
- 🔧 Identify design flaws.

I have two favorites for creating sequence diagrams. WebSequenceDiagrams and Mermaid (links in comment). You can make sequence diagrams easily with just text.

Do you have a go-to tool for crafting good-looking sequence diagrams? Drop your suggestions below! 👇

Computer Science and Programming

12 Feb 2024 15:14

Leveraging SAM for Single-Source Domain Generalization in Medical Image Segmentation

📄 https://arxiv.org/pdf/2401.02076.pdf

💻 https://github.com/SARIHUST/SAMMed

@computer_science_and_programming

Computer Science and Programming

05 Feb 2024 10:22

Ever wondered how your computer securely communicates with a remote server? 🤔

Let's dive into the magic behind SSH and unravel its secrets. 🔍💻

1. What is SSH? 🤷‍♂️
SSH, or Secure Shell, is a cryptographic network protocol that enables secure communication between two devices over an unsecured network. It's like a secure tunnel for your data! 🚇🔒

2. Key Players: Public and Private Keys 🗝
SSH uses a pair of cryptographic keys – a public key (shared with the world) and a private key (kept super-secret). 🤫 When you connect, these keys perform a digital handshake to ensure a secure connection. 🤝🔑

3. The Handshake Dance: Authentication 💃
The handshake involves your computer proving its identity using the private key, and the server verifying it using the corresponding public key. Think of it as a secret password exchange, but way cooler! 😎🕵️

4. Encryption Enchantment: Securing the Chat 🛡
Once the handshake is complete, SSH wraps your data in layers of encryption, ensuring that even if someone intercepts it, they'll find nothing but gibberish. 🤐📡

5. Port Perfection: Default Port 22 🚪
SSH communicates through port 22 by default. It's like the entrance to your secure data party! 🎉🚪 But beware, changing ports adds an extra layer of security. 🕵️‍♀️🔐

SSH is the superhero of secure communication, ensuring your data remains confidential, and the connection is trustworthy. 🦸‍♂️💼 Next time you SSH, remember the cryptographic dance happening in the background, making it all possible! 🕺🌐

Computer Science and Programming

29 Jan 2024 12:13

18 most used Linux commands YOU MUST KNOW

- ls
- mv
- ssh
- cd
- cat
- sudo
- pwd
- grep
- top
-mkdir
- find
- wget
- rm
- chmod
- tar
- cp
- chwon
- gzip