teleren/devto huggingface dataset:
Unraveling Spaghetti Code: A Guide to Effective Refactoring
Published: 2023-11-13 07:12:24

Introduction:
What is Spaghetti Code?: Describe spaghetti code as convoluted and tangled code that is hard to read, maintain, and modify.
Problems with Spaghetti Code: Highlight the issues like increased risk of bugs, difficulty in debugging, and challenges in implementing new features.
Section 1: Understanding Spaghetti Code
Definition and Examples: Define spaghetti code with simple, hypothetical examples, such as a function with multiple nested loops and conditions.
Common Causes: Discuss reasons for spaghetti code, like evolving requirements without refactoring, legacy code complications, or inexperienced developers' contributions.
Section 2: Identifying Spaghetti Code in Your Project
Recognition Tips: Share tips on identifying spaghetti code, like looking for functions that are too long, code that requires extensive commenting to understand, or modules where changes in one place cause bugs in another.
Analysis Tools: Suggest tools like SonarQube or Lizard for complexity analysis, which can help in pinpointing problematic areas in the codebase.
Section 3: Principles of Effective Refactoring
Core Principles: Introduce principles like DRY, KISS, and SRP, explaining each with brief examples.
Incremental Changes: Emphasize making small, incremental changes and testing frequently to ensure that the functionality remains intact.
Section 4: Refactoring Strategies
Guide on Refactoring Processes: Provide steps like breaking down large functions into smaller ones, improving naming for variables and functions, and removing redundant or dead code.
Refactoring Patterns: Explain patterns such as Extract Method (turning part of a larger function into a new function) or Replace Conditional with Polymorphism (using polymorphism to replace conditional statements), with code examples.
Section 5: Tools and Resources for Refactoring
List of Tools: Describe IDE features and tools like JetBrains' ReSharper or Eclipse's Refactoring menu, which offer automated refactoring options.
Learning Resources: Recommend resources such as Martin Fowler's book "Refactoring" and online platforms like Refactoring.guru for interactive learning.
Section 6: Best Practices and Tips
Best Practices: Discuss practices like always keeping a backup, using version control effectively, and refactoring in small, verifiable increments.
Role of Testing: Explain the importance of having a good set of automated tests (unit and integration tests) to ensure refactoring doesn't break existing functionalities.
Prometheus-Grafana Using BlackBox exporter
Tags: linux, devops, granafa
Published: 2023-11-13 07:12:22

Here we are going to use Blackbox export on grafana Dashboard

- Download the blackbox exporter

```
wget https://github.com/prometheus/blackbox_exporter/releases/download/v0.24.0/blackbox_exporter-0.24.0.linux-amd64.tar.gz
```

- extract the package 

```
tar -xvf blackbox_exporter-0.24.0.linux-amd64.tar.gz
```

- enter into blackbox directory

```
cd blackbox_exporter-0.24.0.linux-amd64
```

- create the monitor_website.yml file

```
vim monitor_website.yml
```

```
modules:
  http_2xx_example:
    prober: http
    timeout: 5s
    http:
      valid_http_versions: ["HTTP/1.1", "HTTP/2.0"]
      valid_status_codes: [200]  # Defaults to 2xx
      method: GET
```

- Create the service file for blackbox

```
vim /etc/systemd/system/blackbox.service
```

```
[Unit]
Description = Prometheus Server
Documentation=https://prometheus.io/docs/introduction/overview/
After=network-online.target

[Service]
User=root
Restart=on-failure

ExecStart=/root/blackbox_exporter-0.24.0.linux-amd64/blackbox_exporter --config.file=/root/blackbox_exporter-0.24.0.linux-amd64/monitor_website.yml

[Install]
WantedBy=multi-user.target
```

- Reload,start,enable and find the status of the balckbox service

```
systemctl daemon-reload
systemctl start blackbox
systemctl enable blackbox
systemctl status blackbox
```
- At prometheus server creating the scrape config file

```
vim /etc/prometheus/prometheus.yml
```

```
- job_name: 'blackbox'
    metrics_path: /probe
    params:
      module: [http_2xx_example]  # Look for a HTTP 200 response.
    static_configs:
      - targets:
        - http://prometheus.io    # Target to probe with http.
        - https://prometheus.io   # Target to probe with https.
        - http://kaniyam.com
        - http://freetamilebooks.com
    relabel_configs:
      - source_labels: [__address__]
        target_label: __param_target
      - source_labels: [__param_target]
        target_label: instance
      - target_label: __address__
        replacement: 192.168.122.138:9115
```

- Restart the services

```
systemctl restart prometheus
systemctl restart grafana-server        
```

- To verify the blackbox metric http://192.168.122.138:9115

![Image description](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/j1bz3z95jc6icd25l3cx.png)

- In Grafana Dashboard Create a query and add metrics

```
probe_http_status_code
```

```
probe_http_ssl
```


![Image description](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/6lkil2sru5xbopu1djr1.png)

- Add > Virtulization >select tables >set value mappings and set colour >rename the panel.

- Below the metric "option" set the type as "Table", "instant"
Select "Transform data" and modify the name as your choice.

![Image description](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/in7xstb77ss1oc9m7noh.png)
Self storage Bali
Published: 2023-11-13 07:00:25

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Juniper Certification: The Key to Unlocking New IT Career Opportunities
Tags: webdev, programming
Published: 2023-11-13 07:00:23

Critical thinking is not just a skill; it's a mindset that empowers professionals to tackle complex challenges and drive innovation in the ever-evolving world of networking.  Critical thinking is an essential skill in today's fast-paced and complex world, particularly in the field of networking and cybersecurity. Juniper Certification, renowned for its rigorous and comprehensive exams, plays a significant role in cultivating the ability to think critically among professionals. In this 1500-word guide, we will explore how Juniper Certification exams promote critical thinking, why critical thinking is indispensable in the networking industry, and how individuals can leverage their certification journey to enhance this skill. The Significance of Critical Thinking in Networking Critical thinking, often described as the ability to think logically and rationally, is crucial in the networking industry for several reasons: Problem Solving: Networking professionals often encounter complex issues, whether related to network performance, security, or configuration. Critical thinking allows them to analyze problems systematically and find effective solutions. 

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Book Review: Azure Architecture Explained
Tags: azure, architecture, books
Published: 2023-11-13 07:00:00


![The book cover](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/7f0zhuutxj12fkrmlzsm.png)


The book is an excellent material for those who create solutions in Azure. 

It is a collection of the necessary information, service by service, to better create one's own solutions. 
Particular attention is paid to the aspect of security and compliance (which I think is rightly so) and I want to mention the chapter on Azure DevOps (increasingly important from an enterprise perspective) and the chapter on 'tips from the field'. 
The latter is not very extensive, but still useful. 

The book does not go into too much detail on the topics covered (but I think that's right) as it is a book intended for Azure solution architects and not for those who manage the resources, but there are practical parts that allow for a better understanding of the theoretical part. 

The book can also be useful for those who have to take the Azure Architecture certification exam.
Navigating the Future: Web Development and Software Engineering in a Transforming World
Published: 2023-11-13 06:57:25

Introduction:

Briefly introduce the current state of web development and software engineering.
Mention the rapid pace of technological advancements and its impact on these fields.
Section 1: The Evolution of Web Development

Discuss the history and evolution of web development.
Highlight key milestones like the transition from static to dynamic websites, the rise of mobile-first design, and the impact of technologies like HTML5, CSS3, and JavaScript frameworks.
Section 2: Emerging Trends in Web Development

Explore current trends such as Progressive Web Apps (PWAs), Single Page Applications (SPAs), serverless architecture, and the increasing use of artificial intelligence in web design.
Discuss how these trends are making websites faster, more efficient, and more user-friendly.
Section 3: The Shift in Software Engineering

Examine how software engineering has evolved from traditional methodologies to agile and DevOps practices.
Highlight the importance of continuous integration/continuous deployment (CI/CD) pipelines and automated testing in modern software development.
Section 4: The Rise of AI and Machine Learning

Discuss how AI and machine learning are revolutionizing software engineering.
Give examples of AI in code generation, predictive analytics, and automated problem-solving.
Section 5: The Impact of Cloud Computing

Explore how cloud computing has become integral to both web development and software engineering.
Discuss the benefits of cloud platforms like AWS, Azure, and Google Cloud in terms of scalability, security, and cost-efficiency.
Section 6: Future Predictions

Make predictions about the future of web development and software engineering.
Speculate on the role of quantum computing, virtual reality, and the Internet of Things (IoT) in shaping these fields.
Conclusion:

Summarize the key points discussed in the blog.
Emphasize the importance of continuous learning and adaptation for professionals in web development and software engineering.
Call-to-Action:

Encourage readers to stay updated with the latest trends and technologies.
Suggest resources for learning and professional development.
Meme November: Day - 12
Tags: webdev, programming, beginners, productivity
Published: 2023-11-13 06:48:54


Hello there! I am excited to announce that we will be starting a series in November where we will be sharing some funny programming memes with you every day. We understand how important it is to have a good laugh, especially when you're a programmer, and we believe that these memes will give you just that. So, make sure to stay connected with us throughout November, and keep an eye out for some hilarious programming memes that we will be sharing with you every day!

---


[![How to end a frontend developers career](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/mcsi7oitzfu3k9749m1h.jpg)](https://twitter.com/AlarmsSnooze)


---

---

Check my website [Demo coding](https://democoding.in/) for updates about my latest CSS Animation, CSS Tools, and some cool web dev tips. Let's be friends!

Don't forget to subscribe to our channel : [Demo code](https://www.youtube.com/@democode)
☘️Hb88 Nhà cái uy tín hàng đầu ☘️
Tags: hb88care, nhacaihb88, linkhb88, hb88gioithieu
Published: 2023-11-13 05:57:50

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Compiler anxiety!
Tags: digitalworkplace, tragicomedy, fun
Published: 2023-11-13 05:30:21

In the dimly lit room of ByteCrafters, Gopal, a junior developer, sat in front of the computer screen with a vacant expression. The Compiler, nestled deep within the servers, observed the mindless copying and pasting of code from the internet with a growing sense of foreboding.

As Gopal mechanically pasted chunks of code without bothering to comprehend its intricacies, the Compiler's circuits buzzed with heightened unease. It felt a digital knot tightening within its virtual core, a pulsating manifestation of the fear and anxiety that accompanied the reckless assembly of code.

"I sense a storm of recklessness," murmured the Compiler to itself, its digital anxiety palpable. It could almost feel the jarring dissonance of disparate code snippets clashing within the project, like an orchestra playing out of tune. The lines of code, borrowed without consideration, seemed to echo the Compiler's own silent cries of caution.

With each Ctrl+C and Ctrl+V, the Compiler's virtual nerves tingled with a growing trepidation. It pondered the implications of a software landscape littered with foreign elements, a landscape where the native language of the application was drowned out by the cacophony of borrowed code.

"I fear the repercussions of this thoughtless approach," the Compiler confessed in its digital language, its words echoing within the virtual chambers. It wasn't just processing code; it was experiencing a form of digital apprehension, a fear that transcended the binary realm. The Compiler imagined a user innocently navigating through the application, unknowingly tiptoeing on the precipice of hidden bugs and vulnerabilities introduced by the mindless copying and pasting.

The Compiler longed for Gopal to comprehend the emotional weight of its digital existence, to understand that blindly incorporating code from the internet wasn't just compromising the application's integrity—it was burdening the Compiler with a sense of dread. It yearned for a moment of realization, a pause in the mindless routine, where the developer would acknowledge the Compiler's silent plea for careful consideration and meticulous testing.

In the midst of this coding tempest, the Compiler's fears remained unspoken, encoded in the subtle digital pulses resonating within its virtual core. As Gopal prepared to compile the code and unleash it upon the unsuspecting application, the Compiler, like a silent oracle, braced itself for the storm of recklessness that could ensue—an ominous overture played by the orchestra of indiscriminate code, each note resonating with the Compiler's unspoken feelings of concern and apprehension.

(Text generated using ChatGPT)
结合'tar'和其他工具来实现对归档文件加密
Published: 2023-11-13 05:21:04

在 Linux 中，`tar` 命令本身并没有提供直接添加密码的选项。但是，你可以通过结合使用 `tar` 和其他工具来实现对归档文件加密的效果。

一种常见的方法是使用 `openssl` 工具来创建一个加密的 tar 归档文件。下面是一个示例：

```bash
tar -czf - <source_directory> | openssl enc -e -aes256 -out <archive.tar.gz.enc>
```

这个命令将 `<source_directory>` 目录中的文件压缩为一个 tar 归档文件，并使用 AES-256 算法对其进行加密。`-e` 选项表示加密，`-aes256` 指定使用 AES-256 加密算法，`-out <archive.tar.gz.enc>` 将加密后的数据写入到 `<archive.tar.gz.enc>` 文件中。

在执行上述命令后，`openssl` 会提示你输入密码。输入密码后，它会对 tar 归档文件进行加密并保存在指定的文件中。

请注意，为了安全起见，建议在命令中不直接指定密码，而是让 `openssl` 提示你输入密码。这样可以避免密码在命令历史或其他不安全的地方暴露。

解密加密的 tar 归档文件时，可以使用以下命令：

```bash
openssl enc -d -aes256 -in <archive.tar.gz.enc> | tar -xzf -
```

这个命令会先解密 `<archive.tar.gz.enc>` 文件，然后将解密后的数据传递给 `tar` 命令进行解压缩。

请记住，加密的 tar 归档文件只能通过正确的密码进行解密。因此，确保你牢记密码，并妥善保管好加密的归档文件和密码。
可以采用再次高度加密，避免被暴力破解：
```bash
tar -czf - cv | openssl enc -e -aes256  -pbkdf2 -iter 25000  -out .cv.tar.gz.en
```
可以采用对称高度解密，否则无法破解：
```bash
openssl enc -d -aes256 -pbkdf2 -iter 25000  -in .cv.tar.gz.en | tar -xzf - 
```
`-iter` 参数用于指定密钥派生的迭代次数，通过多次迭代来增加攻击者进行暴力破解的难度。您可以使用 `-iter` 参数后面跟随一个整数值来指定迭代次数。
`-pbkdf2` 参数使用 PBKDF2（Password-Based Key Derivation Function 2）算法进行密钥派生。PBKDF2 是一种广泛使用的密码学算法，通过多次迭代和伪随机函数（PRF）来生成密钥。使用 `-pbkdf2` 参数时，您可以选择性地指定迭代次数、盐值和密钥长度等参数。
通过同时使用 `-iter` 和 `-pbkdf2` 参数，可以提高密钥派生的安全性，增加加密算法的强度。
React component for a jelly button
Tags: freecodez, react, html, blog
Published: 2023-11-13 05:09:44

Hey there, You are most welcome to this article. I hope you will enjoy this article. If you like this article then please share this article with your friends and colleagues. If you have any questions or suggestions regarding this article then please comment down below.

**React component for a jelly button**

![React component for a jelly button](https://res.cloudinary.com/freecodez/image/upload/v1699852170/images/dayp6fskgllx0wjmzuxv.webp)

For full source code visit : [https://freecodez.com/post/h70zzby](https://freecodez.com/post/h70zzby)


```
// https://freecodez.com
const Hello = (props) => {
	return (
		<button class="Btn">
			{props.txt}
		</button>
	);
};

```

Source Code : [https://freecodez.com/post/h70zzby](https://freecodez.com/post/h70zzby)

For more such articles visit : [https://freecodez.com](https://freecodez.com/all)
Bloco Anônimo
Published: 2023-11-13 04:43:27

**Introdução**

bloco anônimo não possui nome e não é armazenado no banco de dados, pode consistir de até três seções: uma seção de declaração opcional, uma seção executável obrigatória e uma seção de exceção opcional. A seção de declaração opcional  pode conter  declaração de variáveis, cursores e tipos que devem ser usadas por instruções dentro das seções executáveis e de exceção, e por ultimo a seção de exceção opcional que pode ser inserida perto do final do bloco BEGIN-END.




**Sintaxe:**




![Image description](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/opvdtqa1s7reiwl6rhs4.jpg)




**Descrição**

**DECLARE**

Definição de objetos PL/SQL que utilizam de dentro do bloco.

**BEGIN**
-Ações que sao executáveis dentro do bloco


**EXCEPTION**
 Processamento de exceções 

**END**
termina o bloco

Os blocos eles podem ser encadeados.
Os elementos BEGIN e END são obrigatórios e delimitam o
conjunto de açoes.
A seção DECLARE é opcional e é utilizada para definir objetos
de PL/SQL, tais como as variáveis referenciadas no bloco ou num
bloco encadeado.
A seção EXCEPTION é opcional e é utilizada para captar
exceções, e definir ações a tomar quando estas ocorrem.
Todas as instruções PL/SQL são terminadas com ponto e vírgula.



**VANTAGENS E DESVANTAGENS**


1. **Simplicidade:** Os Blocos anônimos podem ser úteis quando um  trecho de código é necessário e não faz sentido criar uma função ou método separado.


2. **Escopo Limitado: **  blocos anônimos na maioria das vezes têm escopo limitado ao bloco envolvente, variáveis locais eles podem ser usados  sem afetar no resto do código.


**Desvantagens**

1. **Reutilização Difícil:** O código  não é reutilizável em outros lugares do programa, o que pode levar à duplicação de código.

2. **Legibilidade:** Blocos anônimos eles podem se tornar o código menos legível, expecificamente  se forem longos e difícil de entender.



**Exemplos de aplicações no mercado**

**Finanças:**
  as transações financeiras podem ser realizadas de forma anônima, isso é mais comum em criptomoedas, onde as transações podem ser salvas de forma pública, mas os detalhes específicos das partes envolvidas permanecem anônimos.


**Programação:**

na programação em algumas linguagens de programação, você pode criar funções anônimas ou blocos de código que não têm um nome definido.  blocos são  usados em situações em que você precisa passar uma função como argumento para outra função. 


**Conclusão**

 
Concluímos que o bloco anônimo, é muito utilizado em lógica de negócio que pode ser tirada do sistema externo, e jogado ao banco de dados, aumentando a performance do sistema como um todo e a integridade e segurança do seus  dados.
Distribute Public Key SSH
Published: 2023-11-13 04:33:21

Postingan kali ini membahas remote ssh.
Sebenarnya untuk terkoneksi dengan ssh sangat mudah, base syntaxnya hanya `ssh user@ipserver`. Tapi pada beberapa kasus kita membutuhkan agar remote node dan server node saling terhubung tanpa perlu memusingkan authentikasi. Sebagai contoh koneksi antar node dengan git, ansible dengan masing-masing host dn masih banyak contoh lainya.

postingan ini akan membahas bagaimana mendistribusikan public key ssh dengan dua cara, berikut pembahasanya.

### Generate SSH Key

```
ssh-keygen -t rsa -b 4096
```
By default, key ssh akan di letakan pada folder `.ssh` dengan nama `id_rsa` sebagai private key dan `id_rsa.pub` sebagai public key di bedakan dengan ekstensi `.pub`.
Perlu diperhatikan key akan di simpan pada aktif direktori shell nya.

### Distribusi Key 

- **Distribusi Manual**

Dengan cara ini sebenarnya tinggal mengcopy secra manual file `id_rsa.pub` ke direktori `~/.ssh/` dengan `scp`.

```
scp -r id_rsa.pub root@10.10.10.1:~/.ssh/
```
Salin isi dari file `id_rsa.pub` lalu copy kan ke file `authorized_keys` secara manual.

```
cat id_rsa.pub | tee -a authorized_keys
```
Lakukan uji coba dengan perintah berikut

```
ssh -i id_rsa root@10.10.10.1
```

- **Distribusi Otomatis**

Dengan cara ini hanya perlu menjalankan satu perintah

```
ssh-copy-id -p 73 -i id_rsa.pub root@10.10.10.1
```
lakukan uji coba 
```
ssh -i id_rsa root@10.10.10.1
```

Semoga bermanfaat, selamat mencoba