teleren/devto huggingface dataset:
Common graph algorithms: MST (Minimum Spanning Tree) algorithm
Tags: graphtheory, apacheage
Published: 2023-08-14 13:38:23

##Introduction
When diving into the realm of graph theory and network optimization, the Minimum Spanning Tree (MST) algorithm emerges as an important tool. This algorithm holds significance in solving many real-world problems, ranging from designing efficient networks to cluster analysis and more.

##Understanding the MST Algorithm
At its core, the Minimum Spanning Tree algorithm seeks to connect all nodes in a graph while minimizing the total edge weight. Unlike other graph algorithms that focus on finding the shortest path between two nodes, MST concentrates on constructing a tree that spans all nodes with the least possible edge weight sum.

##Key Concepts:

Edge Weight: Each edge in the graph is assigned a weight that represents a cost, distance, or similarity measure between the connected nodes.

Greedy Approach: The MST algorithm employs a greedy approach, iteratively selecting the edge with the smallest weight that doesn't form a cycle in the current tree.

##Algorithm Steps

Initialize: Begin with an empty set of edges.

Select an Edge: Choose the edge with the smallest weight that doesn't create a cycle in the current set of edges.

Add to MST: Add the selected edge to the Minimum Spanning Tree.

Repeat: Continue selecting and adding edges until the tree spans all nodes.

##Applications and Use Cases

The MST algorithm finds its utility in a variety of fields due to its ability to uncover efficient connections in networks. Some notable applications include:

Network Design: Constructing optimal communication networks, electrical grids, and transportation systems.

Cluster Analysis: Grouping similar data points together, often used in data science and machine learning.

Approximation Algorithms: MST serves as a key component in various approximation algorithms, aiding in solving complex problems efficiently.

Geographic Routing: In geographical networks, MST helps establish efficient paths for data transmission.

The Minimum Spanning Tree algorithm stands as a fundamental pillar in the domain of graph theory and optimization. By selecting edges based on their weights and avoiding cycles, it crafts a tree that connects nodes optimally. Its applications extend across diverse fields, including network design, data analysis, and approximation algorithms. 

To implement graph databases you can use PostgreSQL's extension Apache AGE: -
More about apache age here: https://age.apache.org/
Github here: https://github.com/apache/age/
To implement MST algorithms in Apache AGE, you can use drivers given here and use AGE with programming languages such as python: https://github.com/apache/age/tree/master/drivers
Elevate Database Efficiency: Diving into Gist in PostgreSQL (Part-2)
Tags: postgressql, apacheage
Published: 2023-08-14 13:23:21

## Introduction to Gist Indexing
When it comes to querying and searching large datasets, traditional methods can prove inadequate. This is where Gist indexing in PostgreSQL comes to the rescue. Gist is a flexible indexing technique that supports various data types, enabling efficient search operations on complex data structures.

## Understanding the Gist Index Structure
Gist indexes are built on the foundation of a balanced tree structure. Unlike B-tree indexes that work with simple equality comparisons, Gist indexing is adaptable for a wide range of data types, including geometric shapes, IP addresses, and more. This versatility makes it a go-to choice for scenarios requiring specialized search capabilities.

## Advantages of Gist Indexing
The adoption of Gist indexing offers several advantages. Firstly, its versatility accommodates diverse data types, making it suitable for multidimensional data. Secondly, Gist indexes allow operators beyond equality, enabling range searches and complex queries. Moreover, Gist indexes can be tailored for custom data types, extending their application to unique use cases.

## Use Cases of Gist Indexing
Gist indexing finds applications across various domains. In spatial databases, Gist is instrumental in optimizing queries involving geographical data, allowing for efficient location-based searches. It also excels in text search scenarios, enhancing the performance of searches involving text patterns or keywords.

## Implementing Gist Indexing in PostgreSQL
The process of implementing Gist indexing involves defining an index on a column of a table. See the example format below
```sql
CREATE INDEX gist_index_name ON table_name USING gist (column_name);
```
PostgreSQL automatically chooses the appropriate Gist operator class based on the data type, allowing seamless integration. Developers can utilize the power of Gist indexing with minimal effort.

## Gist Indexing for Text Search
Text search remains a vital requirement across diverse platforms. Discover how Gist indexing can enhance text search performance, making it a valuable asset for applications relying on textual data.

## Conclusion
In the pursuit of database efficiency, embracing advanced indexing techniques is paramount. Gist indexing in PostgreSQL empowers developers to optimize queries involving intricate data types and complex searches. By mastering Gist indexing, you unlock the potential to harness the full power of PostgreSQL, enhancing both performance and user experience.
Issue in Usestate
Published: 2023-08-14 13:22:51

Hi there, I'm using react from 3 years and now a day I'm getting an issue that a state has some value and I'm getting null value from state just like 
selectedConversation is has value It shows me in my component but when I'm calling a function I'm getting it null 
now I tricked an other method to get value like so

 let selected_conversation = "";
      setSelectedConversation((old) => {
        console.log(old, "oldoldoldoldold");
        selected_conversation = old;
        return old;
      });
now one time function is called selected_conversation has value and if I'm calling again it gives me empty value 3rd time give correct value 4th time again empty ?

if anyone want to take me on call I'll be available 
Thanks for your time
MySQL DATEDIFF: Function Explanation with Examples
Published: 2023-08-14 13:04:14

Introducing the ultimate manual for MySQL DATEDIFF! Within this all-encompassing manual, we will delve into the extensive details of this valuable function and its pragmatic uses. We will conduct an in-depth examination of its structure, supported by a universally applicable Integrated Development Environment (IDE) designed for MySQL and MariaDB - namely, dbForge Studio for MySQL. Furthermore, we will furnish you with practical instances to illustrate the diverse ways in which DATEDIFF can be employed. These include computing ages, monitoring project timelines, and various other scenarios.

https://blog.devart.com/mysql-datediff-function.html 
![Image description](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/lciepv299ye0gub8eywt.jpg)
I’m Back on Twitch! Join Me for Live Coding, Learning, and Fun!
Tags: programming, webdev, ai, vscode
Published: 2023-08-14 13:11:09

Hello, everyone! I'm excited to announce that I'm coming back on Twitch after a long hiatus. I've been busy with some personal and professional projects (such as LinkedIn Courses, publishing books and much more), but I've missed streaming and interacting with you all.
So, I've decided to resume my live coding sessions, where I'll be sharing my development journey, learning new skills, and building cool stuff.

I'll be streaming on **Tuesdays and Thursdays** at **4 PM CET**. You can expect to see me working on various topics, such as web development, artificial intelligence, and more. I'll also be using different languages and frameworks, such as C#, JavaScript, React, TypeScript, and more. I'll try to explain my thought process and code as I go along, and I'll be happy to answer any questions you might have.

My goal is to learn in public and share my knowledge and experience with you.
I will start with a small project (develop a new VS Code Extension) and from the next weeks a big migration from a Blazor WASM project to a Blazor Server project.
I hope you'll join me on this journey and have fun along the way. If you're interested, please follow my channel [twitch.tv/kasuken](https://twitch.tv/kasuken) and turn on the notifications so you don't miss any of my streams. You can also check out my GitHub profile [github.com/kasuken](https://github.com/kasuken) to see some of the projects I've worked on.

Thank you for your support and I hope to see you soon on Twitch! 😊

![me on Twitch](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/4ju2w8yljx8ml8vnf4a1.jpeg)

---

Are you interested in learning GitHub but don't know where to start? Try my course on LinkedIn Learning: [Learning GitHub](https://bit.ly/learninggithub).

![LinkedIn Learning](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/sdc2bpiftpadibi4h51c.gif)
Music Monday — What are you listening to? (Niche Edition)
Tags: watercooler, discuss, music
Published: 2023-08-14 13:00:00

_cover image source: [Giphy](https://giphy.com/gifs/augenblickstudios-weird-al-yankovic-l3zVRHhbgVgyfijAId)_

**We've kinda gone down similar roads before — I'm looking at you [Strange Edition](https://dev.to/devteam/music-monday-what-are-you-listening-to-strange-edition-2d00). What can I say? I'm drawn to the unusual. And to be clear, I don't think think "niche" equates to strange, rather it just means kinda specialized or targeted for a specific group... I suppose many music genres could be considered niches, so if you want to go in that direction, I definitely won't stop ya. Looking forward to hearing y'all's different takes on this one!**

![Famously memed clip from Pulp Fiction of John Travolta looking around confused... someone pulled his character out from the clip and superimposed him into a room full of modular synthesizers. Wires are all over the place and he seems confused by the multitude of machines surround him.](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/o3p4czlaylz6vcacslda.gif)

***

## How we do 

In this weekly series, folks can chime in and drop links to whatever it is they've been listening to recently + browse others suggestions. You can follow the suggested genre if you'd like, but don't feel confined to it; you're free to suggest whatever you wanna. 🙌  

If you're interested in having other discussions about music, consider following the aptly named [#music discussions](https://dev.to/music-discussions) organization.

{% embed https://dev.to/music-discussions %}  

***

So, what's a niche type of music that you're into!? _Note: you can embed a link to your song using the following syntax `{% embed https://... %}`. This should work for most common platforms!_

Looking forward to listening to y'all's suggestions! 🎶
Profile Search on JavaScript outputting undefined
Tags: javascript, profile, search
Published: 2023-08-14 13:07:09

Profile Search on JavaScript outputting undefined

Profile Search on JavaScript outputting undefined
-------------------------------------------------

Have you ever encountered the dreaded "undefined" while trying to search for a profile on JavaScript? Fear not, you are not alone! This common issue can be frustrating, but with a little understanding and troubleshooting, you can easily overcome it.

When searching for a profile on JavaScript, it's important to ensure that the data you are accessing is valid and properly defined. Oftentimes, the "undefined" error occurs when the requested data is not available or has not been properly initialized.

Here are a few possible reasons why you might be seeing the "undefined" output:

1.  **Missing or misspelled property:** Double-check the property name you are trying to access. It's easy to overlook a typo or forget to include a required property.
2.  **Async operations:** If you are making an asynchronous request to fetch profile data, make sure you handle the response correctly. The "undefined" error can occur if the response has not been received yet or if there was an error during the request.
3.  **Null values:** Sometimes, the profile data you are searching for may contain null values. Ensure that you handle these cases appropriately to avoid any unexpected "undefined" outputs.
4.  **Incorrect data structure:** Check if the data structure you are using matches the expected format. If the structure is incorrect, it can lead to undefined outputs when accessing properties.

To troubleshoot the issue, you can use console.log statements to inspect the data at different points in your code. This can help you identify where the "undefined" error is occurring and track down the root cause.

Remember, debugging can sometimes be a funny process. As the saying goes, "The best thing about a boolean is even if you are wrong, you are only off by a bit!" So, embrace the debugging journey with a sense of humor.

In conclusion, encountering "undefined" while searching for a profile on JavaScript is a common issue that can be resolved with careful troubleshooting. By checking for misspelled properties, handling async operations correctly, accounting for null values, and ensuring the correct data structure, you can overcome this error and retrieve the desired profile information.

### References:

*   [MDN Web Docs - Undefined](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Errors/Undefined)
*   [W3Schools - JavaScript Errors](https://www.w3schools.com/js/js_errors.asp)
*   [FreeCodeCamp - What is Undefined in JavaScript?](https://www.freecodecamp.org/news/what-is-undefined-in-javascript/)
14 cualidades esenciales para ser un buen líder
Tags: líder, cualidades
Published: 2023-08-14 13:04:34

En el mundo empresarial y en muchos otros ámbitos, la figura del líder es fundamental para orientar a un grupo hacia el logro de objetivos. Ser líder no sólo implica tener un título o un puesto alto, sino también poseer una serie de cualidades que inspiren y motiven a otros. A continuación, presentamos 14 cualidades esenciales que debe tener un buen líder:

**1. Visión:** Un líder debe tener una visión clara del futuro, una imagen de lo que quiere lograr y cómo llegar allí. Esta visión debe ser compartida y transmitida a su equipo para mantenerlos enfocados y motivados.

**2. Integridad:** Actuar con honestidad y transparencia es fundamental. Los líderes íntegros generan confianza y establecen el tono ético para toda la organización.

**3. Comunicación efectiva:** Un buen líder sabe escuchar y transmitir ideas de manera clara. Esta habilidad permite establecer conexiones y asegurarse de que todos estén en la misma página.

**4. Empatía:** Entender y preocuparse por las necesidades y sentimientos de otros es esencial. La empatía permite construir relaciones más fuertes y comprensivas.

**5. Capacidad de tomar decisiones:** Un líder debe ser resolutivo y tener la habilidad de tomar decisiones, incluso en situaciones de presión o incertidumbre.

**6. Inspiración:** Más allá de dirigir, un líder inspira y motiva a su equipo a dar lo mejor de sí mismos.

**7. Adaptabilidad:** En un mundo en constante cambio, la capacidad de adaptarse es fundamental. Un buen líder debe ser flexible y dispuesto a evolucionar.

**8 Confianza en sí mismo:** Tener confianza en las propias habilidades y decisiones es vital. Esta autoconfianza es contagiosa y eleva la moral del equipo.

**9. Resiliencia:** La capacidad de recuperarse de las adversidades y seguir adelante, aprendiendo de los errores y fracasos.

**10. Trabajo en equipo:** Apreciar y promover el trabajo en equipo, reconociendo que los logros son el resultado de esfuerzos colectivos.

**11. Responsabilidad:** Asumir la responsabilidad de los actos y decisiones, tanto en los éxitos como en los fracasos, sin delegar culpas.

**12: Persistencia:** Continuar luchando por los objetivos, incluso frente a obstáculos y desafíos.

**13: Habilidades interpersonales:** Ser capaz de relacionarse de manera efectiva con una variedad de personas, desde empleados hasta accionistas y clientes.

**14: Capacidad de autocrítica:** Reconocer los propios errores y limitaciones, y estar dispuesto a aprender y mejorar constantemente.

En conclusión, ser un buen líder implica una combinación de habilidades interpersonales, decisiones estratégicas y una pasión genuina por lo que se hace. Las cualidades mencionadas anteriormente no sólo ayudan a dirigir equipos con éxito, sino también a construir relaciones sólidas y duraderas que impulsarán a cualquier organización hacia adelante.
Home SWEET Home - Page 25
Published: 2023-08-06 20:14:04

- யார்றா அந்த உளவாளி?
- அதான் இருக்காேள கஞ்சா குடுக்கி, அவ கிட்ட சொல்லி உன்  கேபின் கிட்ட காது  வைக்கச்  சொல்லி இருக்கேன்.
- நாட் மேரிட் பட்  ஆல்ரெடி  கமிட்டட்
ஒருத்தன அழ வச்சு நான் சந்தோஷ படுறவன் இல்லடா.
- Time for Technology , **What is File System** ? If you want to use any Empty Disc , first we need to configure file system for that. 
In Linux we have many file systems like **ext4** - This is the default FS were all distro's are using now-a-days. So in LINUX MINT the root partition will be using this FS only.
In LINUX everything is **FILE**.
All physical hard disc - **'/dev/sda'**
CD ROM - **'/dev/sr()'**

- So **'/dev/sda'** is like C Drive in WINDOWS ? அதுதான் இல்ல , its **'/dev/sda1'** இதுதான் C drive  மாதிரி First partition.
- In Linux we won't use any C or D drive concept. Each partition will be mapped to File System with a folder.
- The parent folder of File system is **"/"** its called Root Directory. These folders will act like mount point to **'/dev/sda1'** in file system.
- Which partition is mapped with which folder can be identified by using ,
```
/etc/fstab
man 5 fstab
mount
```
![Image description](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/cm1es3png0y7y0rimnth.png)
```
ls -ld /
```
![Image description](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/n00gt2q2no0oj1wlujxp.png)

- With this output , we can see only ROOT user can modify.
For all users , a home directory will be created like **"ls -ld /home/subraja"**

![Image description](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/p8tjkma7ng68u6grhun3.png)

- In "/" , there will be many folders.  But **"/boot, /proc, /dev, /etc, /home, /usr, /var, /tmp"** these folders are very important.

![Image description](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/yqax3tnbpgr3fdq5mzfp.png)

![Image description](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/wbyxp1z8xk9ny44bgq2d.png)

- ஏன் முகத்துல இவ்வளவு பெரிய தாடி? அதுவும் டிரிம் கூடப் பண்ணாம?  வேண்டுதலா? இந்தக்  கோலத்துல இருந்தா எவளும் கட்டிக்கமாட்டா,   தெறிச்சி ஓடுவா’, அப்படி ஓடாம இருக்குற பொண்ணுக்காக wait பண்ணிட்டு  இருக்கேன்.

- இருந்தாலும் YOU HAVE TO TAKE STEPS TO IMPRESS A GIRL. Once they trust the person , they will relive the truth .

- உங்க native chennaiயா?’ கார்த்திகா கேட்க  இல்லைங்க,  போதி தர்மர் பிறந்த ஊர், காஞ்சிபுரம்.

- **Really a HEART TOUCHING sentence for ME**, " சோறு வேணும்னா யாராவது  சேத்துல இறங்கி தான ஆகனும், அப்படி இறங்கி கஷ்டபட்றவர கட்டிக்க இஷ்டம் தாம்பா” இது என் தங்கச்சிையப்  பொண்ணு பாக்க வரும்  போது அவ என் அப்பாகிட்ட சொன்னது. " 

- It needs some GUTS you know ? That's MY SISTER.
- முரட்டு சிங்கிள்ங்க,  பேயே வந்தாலும் தில்லுக்கு துட்டு விைளயாடலாமான்னு   கேப்பேன்

**IS THIS AUTHOR WROTE ANY MOVIE DIALOGUES ? MAY BE , HE SHOULD BE A FRIEND OF " கிரேசி மோகன் "**

**<u>Reference :</u>**

https://freetamilebooks.com/ebooks/dhuruvangal-technical-novel/
Caption This! 🤔💭
Tags: watercooler
Published: 2023-08-14 13:00:00

We're back with another episode of Caption This! We provide the image, y'all provide the caption. Let's roll!

![A person in a green hoodie with their face covered is walking against a black background, lines of numbers in green are overlayed across the whole image and look a bit like the green vertical text lines from The Matrix](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/0w3rwyhwki8y4qd7z4wg.jpg)

Follow the DEVteam for more online camaraderie!

{% embed [https://dev.to/devteam](https://dev.to/devteam) %}
Weekly AI News and Discussion Thread
Tags: ai, discuss, news
Published: 2023-08-14 13:00:00

Hey everyone, the past few months have been pretty electric in terms of advancements in AI and actual/imagined changes to our workflow and industry.

This is a regular open thread where everyone is encouraged to share...

* Notable news in the field of AI
* Personal experiences and insights
* Concerns and fears
* Success stories and demos
* And any other related discussions you'd like to bring to the table

This thread will go out every week.
Fixing SwiftUI: Elements Going Outside Device Area When Adding Background Image
Tags: swiftui, softwaredevelopment, backgroundimage
Published: 2023-08-14 12:07:24

Have you ever encountered the frustrating issue of SwiftUI elements going outside the device area when adding a background image? Fear not, for we have some solutions to fix this problem and bring your UI back within the boundaries of the screen.

The Problem: Elements Gone Wild!
--------------------------------

So, you've decided to beautify your SwiftUI app by adding a stunning background image. Excitedly, you set the image as the background for your main view, but to your dismay, some of the elements within your app are now extending beyond the device area, making them unreachable or partially hidden. It seems like the image is taking control and pushing everything around!

The Solution: Taming the Wild Elements
--------------------------------------

Fortunately, there are a few ways to tame these unruly elements and bring them back within the device area:

1.  **Use a Safe Area Modifier:** One way to ensure your elements stay within the visible area is by using the `edgesIgnoringSafeArea()` modifier. By applying this modifier to your background image, SwiftUI will automatically adjust the layout to respect the safe area boundaries, preventing your elements from going astray.
2.  **Wrap Your Elements:** Another approach is to wrap your elements within a container view, such as a `VStack` or `ZStack`, and apply the `background()` modifier to that container. This way, the background image will only affect the container view, keeping your elements in check.
3.  **Adjust Element Constraints:** If your elements are still misbehaving, you can manually adjust their constraints to ensure they stay within the device area. By setting appropriate constraints or using modifiers like `padding()` or `offset()`, you can nudge your elements back into place.

Conclusion
----------

Adding a background image to your SwiftUI app can greatly enhance its visual appeal. However, it's important to ensure that your elements remain within the device area to maintain a functional user interface. By using safe area modifiers, wrapping elements, or adjusting constraints, you can easily tame these wild elements and bring harmony back to your UI.

Remember, a well-behaved UI is a happy UI!

References
----------

*   Apple Developer Documentation: [edgesIgnoringSafeArea(_:)](https://developer.apple.com/documentation/swiftui/view/edgesignoringsafearea(_:))
*   Apple Developer Documentation: [background(_:alignment:)](https://developer.apple.com/documentation/swiftui/view/background(_:alignment:))
*   Apple Developer Documentation: [padding(_:)](https://developer.apple.com/documentation/swiftui/view/padding(_:))
*   Apple Developer Documentation: [offset(_:)](https://developer.apple.com/documentation/swiftui/view/offset(_:))