teleren/devto huggingface dataset:
Integrate crypto POS terminal. Accepting USDT and other coins in your store.
Tags: news
Published: 2024-05-30 15:25:09


![Image description](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/q8btliv62w0vxouyrhf9.png)

In today’s fast-paced, technology-driven world, businesses must adapt to keep up with evolving consumer demands and technological advancements. One of the essential tools for modern commerce is the Point of Sale (POS) system. 

---

A **POS terminal** is an electronic device used by businesses to process card payments at retail locations. It is a combination of hardware and software that enables transactions by reading payment cards, capturing payment details, and completing sales. 

---

[Apirone](https://apirone.com) has developed its own POS terminal that helps merchants accept payments in cryptocurrencies. This integration acts as a bridge between the POS system and the blockchain network. Here are some benefits of this integration:

1. **Expanded payment options:** By accepting cryptocurrency, businesses broaden their customer base. This inclusivity can drive more sales and increase customer satisfaction.

2. Lower transaction fees: Cryptocurrency transactions incur lower fees compared to traditional credit card processing fees. This can result in significant cost savings for businesses.

3. **Fast and secure transactions:** Cryptocurrency payments are processed on the blockchain, which ensures secure and transparent transactions. Additionally, these transactions can be faster than traditional payment methods.

4. **Reduced fraud risk:** The decentralized nature of blockchain technology makes it difficult for fraudulent activities to occur. This provides an added layer of security for both businesses and customers.

5. **No chargebacks:** Unlike credit card payments, cryptocurrency transactions are irreversible. This eliminates the risk of chargebacks, which can be a costly and time-consuming issue for merchants.

The POS terminal implies seamless integration with the Apirone payment gateway. The only thing one should do first is create an account in the Apirone system. Then one needs to log in at the POS terminal page using the account ID and transfer key given during the registration. In the profile a merchant chooses a sum in any currency, a fiat one and a cryptocurrency, for example, USD and BTC. So, the invoice is ready to send via QR code or by address.


![Image description](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/mcg6i8a4su7u2lhm059b.png)

All the payment operations are to be monitored in the account with a user-friendly interface. Apirone provides a flexible fee policy, mass payouts, and several popular cryptocurrencies, including Tron and USDT. These currencies ideally fit POS terminal integration since transactions arrive instantly (unlike Bitcoin), which is an advantage for offline shops.
Delhi Airport jobs for freshers
Published: 2024-05-30 15:16:28

Bhartiya Aviation Services (BAS) stands at the forefront of the aviation recruitment sector, dedicated to bridging the gap between aspiring aviation professionals and opportunities within the industry. With the Government of India's Ministry of Civil Aviation (MoCA) granting 'in principle' approval for the establishment of 18 Greenfield Airports across the country, BAS finds itself at a pivotal moment. These forthcoming airports represent a significant expansion in India's aviation infrastructure, promising enhanced connectivity and economic growth. In light of this development, BAS is proud to announce exciting job opportunities at [**Delhi Airport jobs for freshers**](https://bhartiyaaviation.in/). These positions not only offer a gateway into the dynamic world of aviation but also provide invaluable experiences and opportunities for career advancement. As BAS strives to match the right talent with the evolving needs of the aviation sector, it remains committed to fostering a skilled workforce that drives innovation and excellence in every aspect of airport operations. With its proven track record in aviation recruitment, BAS is poised to play a crucial role in shaping the future of India's aviation landscape by facilitating the entry of fresh talent into this thriving industry. Aspiring individuals seeking to kickstart their careers in aviation are encouraged to seize this opportunity and embark on an exciting journey with BAS at Delhi Airport, contributing to the nation's progress and prosperity through their passion and dedication to excellence.
Elvis operator ?: vs Null coalescing operator
Tags: php, operator
Published: 2024-05-30 14:59:17

The Elvis operator and the Null coalescing operator are both binary operators that allow you to evaluate an expression/variable and define a default value when the expression/variable is not available.

## The Elvis operator

The Elvis operator is used to return a default value when the given operand is _false_.
Its name comes from the resemblance of the notation ?: with the hairstyle of the famous singer.

![Image description](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/rc7ib0wj59iajkt29oir.png)

Usage in PHP:

```
$variable = [];
$result = $variable ?: 'default value';
echo $result; // Outputs: default value (since an empty array is considered falsy)
```

Equivalent with a Ternary condition:

```
$variable = [];
$result = $result ? $result : 'default value';
```

## The Null coalescing operator

Quite similar to the Elvis operator, the null coalescing operator returns a default value when the given operand is _null_ or _undefined_.

Usage in PHP:

```
$variable = [];
$result = $variable ?? 'default value';
echo $result; // Outputs: [] (since an empty array is not null)
```

Equivalent with a Ternary condition:

```
$variable = [];
$result = isset($result) ? $result : 'default value';
```
API Testing Got a Glowup
Tags: api, testing, developers, webdev
Published: 2024-05-30 14:49:04

![API Glowup](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/jnb9pobp0wy83qf5go2f.png)
Our Dev team worked hard to make an API testing cloud that sped up API testing and made it more fun to look at! It really got the glowup we think it deserves. We'd love for you to check out the platform and play around on the 'playground'. It's completely free forever (seriously) and is super simple to get started. Tell us what you think in the comments! Start [here](https://qapi.qyrus.com/login?page=sign-up).
Crypto Hacks, Rug Pulls Led to $473M Worth of Losses in 2024: Immunefi
Published: 2024-05-30 14:47:24

Article Content: The article from CoinDesk highlights that in 2024, crypto hacks and rug pulls led to losses amounting to $473 million. This data comes from Immunefi, a security service that monitors vulnerabilities in decentralized finance (DeFi) projects.
Source: coindesk.com
Applying the four principles of accessibility
Tags: a11y, wcag, principles
Published: 2024-06-10 13:32:24

---
title: Applying the four principles of accessibility
published: true
date: 2024-05-30 14:38:23 UTC
tags: accessibility,a11y,wcag,principles
canonical_url: https://adactio.com/journal/21172
---

[Web Content Accessibility Guidelines](https://www.w3.org/WAI/standards-guidelines/wcag/)—or WCAG—looks very daunting. It’s a lot to take in. It’s kind of overwhelming. It’s hard to know where to start.

I recommend taking a deep breath and focusing on [the four principles of accessibility](https://www.w3.org/WAI/WCAG22/Understanding/intro#understanding-the-four-principles-of-accessibility). Together they spell out the cutesy acronym POUR:

1. Perceivable
2. Operable
3. Understandable
4. Robust

A lot of work has gone into distilling WCAG down to these four guidelines. Here’s how I apply them in my work…

### Perceivable

I interpret this as:

**Content will be legible, regardless of how it is accessed.**

For example:

- The contrast between background and foreground colours will meet the ratios defined in WCAG 2.
- Content will be grouped into semantically-sensible HTML regions such as navigation, main, footer, etc.

### Operable

I interpret this as:

**Core functionality will be available, regardless of how it is accessed.**

For example:

- I will ensure that interactive controls such as links and form inputs will be navigable with a keyboard.
- Every form control will be labelled, ideally with a visible label.

### Understandable

I interpret this as:

**Content will make sense, regardless of how it is accessed.**

For example:

- Images will have meaningful alternative text.
- I will make sensible use of heading levels.

This is where it starts to get quite collaboritive. Working at an agency, there will some parts of website creation and maintenance that will require ongoing accessibility knowledge even when our work is finished.

For example:

- Images uploaded through a content management system will need sensible alternative text.
- Articles uploaded through a content management system will need sensible heading levels.

### Robust

I interpret this as:

**Content and core functionality will still work, regardless of how it is accessed.**

For example:

- Drop-down controls will use the HTML select element rather than a more fragile imitation.
- I will only use JavaScript to provide functionality that isn’t possible with HTML and CSS alone.

If you’re applying a mindset of progressive enhancement, this part comes for you. If you take a different approach, you’re going to have a bad time.

Taken together, these four guidelines will get you very far without having to dive too deeply into the rest of WCAG.
Learning flask and prepping for the end of boot camp
Published: 2024-05-30 14:37:59

Phase four of Flatiron School focused on learning Flask to build fullstack applications. I worked on a e-commerce store with three other students which, if implemented, would allow users to buy and sell collectables from their collections/

This phase also taught the basics of cybersecurity, including authenticating users and hashing passwords.

I'm looking forward to building my own full stack application in phase 5. After that, its time to hit the job market, which is scary but also exciting.
Как прокачать сайт, лучшие методы
Published: 2024-05-30 14:34:21

Всем привет, хочу поделиться опытом, как прокачать сайт.
Расскажу о друх проекта: [Онлайн-школа](https://love-language.ru) и [Ателье штор](https://fabrikainterior.ru).
Поднять сайт в топы поисковых систем — это сложная и многогранная задача, которая требует комплексного подхода. Вот несколько ключевых шагов, которые могут помочь улучшить позиции вашего сайта в поисковой выдаче:

1. Оптимизация контента:
   - Создание уникального, качественного и информативного контента.
   - Использование ключевых слов и фраз, релевантных вашей тематике.
   - Оптимизация метатегов, заголовков, описаний страниц.
   - Использование внутренних ссылок для улучшения навигации и структуры сайта.

2. Техническая оптимизация:
   - Ускорение загрузки страниц сайта.
   - Создание мобильной версии сайта.
   - Использование правильной структуры URL-адресов.
   - Оптимизация изображений для ускорения загрузки.

3. Ссылочная стратегия:
   - Получение качественных обратных ссылок (backlinks) с авторитетных сайтов.
   - Участие в гостевых публикациях на других ресурсах.
   - Распространение информации о вашем сайте через социальные сети.

4. Локальный SEO (если применимо):
   - Регистрация вашего бизнеса в онлайн-каталогах.
   - Оптимизация локальных ключевых слов.
   - Получение отзывов и оценок от клиентов.

5. Аналитика и мониторинг:
   - Использование инструментов веб-аналитики для отслеживания трафика на сайте.
   - Анализ ключевых показателей (CTR, отказы, время на сайте).
   - Постоянное тестирование и оптимизация стратегии продвижения.

6. Создание качественного пользовательского опыта:
   - Обеспечение удобной навигации по сайту.
   - Создание привлекательного дизайна и удобства использования.
   - Оптимизация для конверсий (кнопки вызова к действию, формы обратной связи).

Это лишь общие рекомендации, и для каждого сайта может потребоваться индивидуальный подход. 
Помните, что SEO — это долгосрочный процесс, и результаты могут не появиться сразу.
CLI Games and Git struggles
Published: 2024-05-30 14:34:09

For my phase three project at Flatiron School, I worked with two other developers to develop a command line interface game. This is what video games were like back in the 70s and early 80s, before consoles and home machines were powerful enough for graphics.

We made a text adventure set at a slightly strange version of Flatiron School where you have to answer questions about Python coding and win games of chance to move on. 

The biggest issue we ran into actually had nothing to do with coding -- it was making sure our version control practices were sufficient. A few times, multiple team members were working on the main branch and we had merge conflicts.

By the end, though we produced a fun, cheeky game that can also help future Flatiron students prepare for their Phase Three Assessment!
Как выучить английский язык с нуля?
Published: 2024-05-30 14:30:49


1. Установите цели: Определите, зачем вам нужен английский язык (для работы, путешествий, общения и т. д.) и поставьте перед собой конкретные цели.

2. Используйте разнообразные ресурсы: Изучайте язык с помощью учебников, приложений, [онлайн-курсов](https://love-language.ru/kursy-angliyskogo-yazyka/podgotovka-k-ege-po-angliiskomu-yazyku), видеоуроков, аудиоматериалов и т. д. Разнообразие поможет вам находить подходящие способы для изучения.

3. Практикуйтесь в общении: Начните общаться на английском языке с носителями языка или другими студентами. Это поможет вам улучшить навыки разговорной речи.

4. Постоянно пополняйте словарный запас: Учите новые слова и фразы ежедневно. Можно использовать карточки для запоминания слов или приложения для изучения языка.

5. Смотрите фильмы и слушайте музыку на английском: Это поможет вам привыкнуть к звучанию языка и улучшить понимание на слух.

6. Постоянно практикуйтесь: Изучение языка требует постоянной практики. Постарайтесь включать английский в свою повседневную жизнь, даже если это всего лишь несколько минут в день.

7. Не бойтесь ошибаться: Ошибки — это часть процесса обучения. Не стесняйтесь использовать язык, даже если вы делаете ошибки.
TASK 10
Published: 2024-05-30 14:29:21

1) cd path/to/your/project
pip freeze > requirements.txt
Flask==2.0.1
Jinja2==3.0.1
MarkupSafe==2.0.1
Werkzeug==2.0.1
click==8.0.1
itsdangerous==2.0.1
pip install -r requirements.txt
2) To install the Flask module version less than 2.0 using pip in Python, you can specify the version you want by appending it with == followed by the version number. Here's the command:
pip install Flask<2.0
This command will install the latest version of Flask that is less than 2.0. If you want to install a specific version, you can replace <2.0 with the desired version number, for example:
pip install Flask==1.1.4
This will install Flask version 1.1.4 specifically.
Why should we make a website with MERN Stack Technology?
Tags: mern, webdev, javascript, programming
Published: 2024-05-30 14:16:19

Some reasons to build a website with MERN Stack: MERN Stack is a popular web development stack or technology, which uses MongoDB, Express.js, React, and Node.js to create a good quality website.

MongoDB: NoSQL database system, which is easily adjustable and scalable.

Express.js: Backend framework, which provides routing and middleware.

React: Frontend library, which is powerful and interactive for creating user interfaces.

Node.js: Server-side runtime, which creates servers using JavaScript.

Advantages of MERN Stack are:
Single language: Create frontend and backend using JavaScript, which increases compatibility and developer efficiency.

Since the front-end and back-end are one language, the connection is much better. And since the browser can run JavaScript, there is no need to convert or compile other languages. For this, the websites are more run time fast.

Scalability: Maran Stack is easily scalable, due to its MongoDB offering a scalable database system.

The downsides are:
Learning Essentials: Maran Stack takes almost too much time to learn. The MERN Stack website is expensive to maintain.

SEO Challenging: SEO optimization of React-based applications can be difficult. ( No need to worry that’s what Nextjs is for. Nextjs is a full stack library or server site rendering so doing SEO optimization is much easier, much better. )

There are 2 types of rendering of websites.
1. Server-Side Rendering (SSR): In SSR, the server generates HTML and sends it to the client. This earlier helps increase render speed and can help with SEO, but it depends on server response time.

2. Client-Side Rendering (CSR): With CSR, the server simply sends the idealized data, and the client’s browser edits the rendering. It provides a better experience but SEO can be complicated because search engines can’t see content before initial load.

If you have any questions, you can comment, I will try to answer each comment appropriately, Insh-Allah.
The Ultimate beginners guide to open source – Part 2: Defeating the fear of contributing
Tags: opensource, webdev, javascript, beginners
Published: 2024-05-30 14:23:15

Contributing and finding repositories to contribute to is scary. If you are one of those people, I have a hack for you that is sure to help you overcome that fear.

**Pick a project you want to contribute to, click on the “watch” button.**
![Project top bar](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/jndgkegl5d12r5enij9y.png)
![Dropdown for the watch button](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/kqk3h0gqy9bl1mcjm2ag.png)

Click on **_custom _** and pick the following: issues, pull request (optional) and discussions (optional).

This allows you to get notifications on any issue, pull request or discussion created in the project. 

**Here’s what you should do with every type of notification you get:**
1. Issue: When you get an issue notification and you are interested in solving that issue, you will be among the first to view it and decide if you want to work on it, but what if you don't know how to work on that issue? 

You can wait until it's allocated to someone else and then ask that person if you can collaborate; you'll make _a new friend, learn, and have someone lead you through how the project works_. Believe me, the open source software community is really kind.

2. Pull Request: You can review other people's work and that teaches you how to read code, which is a really useful ability to have as a programmer. You also get to view the corrections/suggestions that the maintainers have made to the code, which shows you the project's code practices and a better way of solving and doing things.

3. Discussion: You get to talk to people, ask/answer questions, and discuss the next steps needed for the project. This also gets you friends, and you get to network and better share your expertise on the knowledge you have.


The goal of picking a project to contribute to isn't to try to participate right away; instead, you should familiarize yourself with the project.

Another little tip if you are just starting with open source is to not contribute to big projects, go with projects with 20–1000 stars.

Looking for a project to practice? Try this [Practice Project](https://github.com/dun-sin/code-magic)

_See you in part 3 and check out [part 1 here](https://dev.to/dunsincodes/the-ultimate-beginners-guide-to-open-source-part-1-2la9)._

**_Thanks for reading, let me know what you think about this and if you would like to see more, if you think i made a mistake or missed something, don't hesitate to comment_**
Marketing Tools and Resources for Founders
Tags: webdev, marketing, ai
Published: 2024-05-30 14:20:06

**[The Pixel](http://thepixel.ai/)** presents a meticulously curated selection of leading AI-powered marketing tools, alleviating the time and effort typically involved in discovering and testing them. With comprehensive content, The Pixel aids in maximizing the potential of these tools while keeping you informed about the latest AI-driven marketing techniques. By leveraging The Pixel, you can streamline your marketing strategies, enhance your campaigns, and efficiently achieve superior results. Follow us [twitter](https://twitter.com/thepixelai)


![Image description](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/9z3j731krmdm7blkcbd1.jpg)
Daagdi Chawl Af Somali
Published: 2024-05-30 14:19:24


**Daagdi Chawl Af Somali**

![Image description](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/pg3ngmkydnvc86affh22.jpg)
A simple man Surya is living a peaceful middle class life but an incident forces him to join hands with criminal forces.

By:fanproj

Posted on:September 20, 2022

Genre: Fanproj, Fanproj films, Fanproj Movies, Fanprojplay, Hindi Af Somali, Mysomali, Saafifilms, Streamnxt

Year: 2015

Duration:

Release:2 Oct 2015

Director:Chandrakant Kanse

[Download Now !

Whatch Now !](https://somfanproj.blogspot.com/2024/05/Love-Story-hindi-Af-somali.html)
Retrieving User Roles from Firestore in a Next.js Application
Tags: javascript, firebase, nextjs, firestore
Published: 2024-05-30 14:00:26


At [itselftools.com](https://itselftools.com), our extensive experience with Next.js and Firebase, notably in over 30 projects, has afforded us deep insights into effective ways to integrate backend services with front-end frameworks. This article delves into a practical aspect of user management—retrieving user roles from Firestore, which is a part of building a robust authentication system.

## Why User Roles are Important

In any application that features differentiated access rights or features based on user roles, such as admin, editor, or viewer, managing these roles accurately is crucial. This ensures that users have the appropriate access to functionalities, and sensitive data is safeguarded. Firestore, as a flexible and scalable database from Firebase's suite, is aptly suited for such tasks due to its real-time data syncing, security features, and easy integration with web apps.

## How to Retrieve User Roles from Firestore

Here’s a sample code snippet that demonstrates fetching a user's role from Firestore in a Next.js application:

```js
// 6. Retrieve user role from Firestore
import { useEffect } from 'react';
import { db } from '../firebase'; // path to your Firebase configuration file

const useUserRole = (userId) => {
    useEffect(() => {
        const userRef = db.collection('users').doc(userId);
        userRef.get().then(doc => {
            if (doc.exists) {
                console.log('User Role:', doc.data().role);
            } else {
                console.log('No such user!');
            }
        }).catch(error => {
            console.error('Error fetching user role:', error);
        });
    }, [userId]);

    return role;
};
```

In the above code, the `useUserRole` hook incorporates `useEffect` to execute the Firestore data retrieval asynchronously. We connect to the users' collection, attempt to fetch a document matching the `userId`, and if found, retrieve the `role` value.

## Conclusion

Managing user roles efficiently in an application can significantly enhance the user experience by ensuring each user has the appropriate access and functionality. If you're interested in seeing this code snippet in action, or other innovative applications, visit some of our flagship projects: [text to speech utility](https://read-text.com), [file extraction tool](https://online-archive-extractor.com), and [voice pronunciation guide](https://how-to-say.com). Each of these solutions implements key web technologies that might inspire your next project.