teleren/devto huggingface dataset:
Pergunte ao especialista - Operadores
Tags: java
Published: 2024-07-02 20:48:14

Já que os operadores de curto-circuito são, em alguns casos, mais eficientes do que seus equivalentes comuns, por que Java oferece os operadores AND e OR comuns?

Em alguns casos, você pode querer que os dois operandos de uma operação AND ou OR sejam avaliados devido aos efeitos colaterais produzidos.

![Image description](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/yxyf4cu8l7dh6vr4z8e0.png)

Na primeira instrução if, i é incrementada independentemente do sucesso da condição.
Com o operador de curto-circuito, i não é incrementada quando o primeiro operando é falso.
A lição aprendida é que ao esperar que o operando do lado direito de uma operação AND ou OR seja avaliado, deve-se usar versões dessas operações em Java que não sejam de curto-circuito.
DO NOT use ASP.NET Identity for Minimal API Endpoints!
Tags: csharp, dotnet, beginners, learning
Published: 2024-07-02 20:44:02

### Context:

Since this morning, I’ve been trying to add custom fields to my Identity authentication in my ASP.NET blogging project. I needed to add basic fields like First Name and Last Name. While I managed to add these columns to my database table, they didn’t populate when using the register API. After spending over five hours researching and finding nothing helpful for MVC or Minimal APIs, I stumbled upon [Andrew Lock's article](https://andrewlock.net/should-you-use-the-dotnet-8-identity-api-endpoints/). For more details, you can go through it!
<br />

### My Recommendation

Honestly, save yourself the headache. Skip ASP.NET Identity for Minimal API Endpoints if you need custom user data fields. Consider using custom JWT authentications. You'll avoid a lot of unnecessary hassle.
Tail Recursion
Tags: java, programming, learning, beginners
Published: 2024-07-02 20:41:56

A tail recursive method is efficient for reducing stack size. A recursive method is said to be _tail recursive_ if there are no pending operations to be performed on return from a recursive call, as illustrated in Figure below (a). However, method **B** in Figure below (b) is not tail recursive because there are pending operations after a method call is returned.

![Image description](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/zd1l6sygzfa6jsu31w4h.png)

For example, the recursive **isPalindrome** method (lines 9–16) in [RecursivePalindrome.java](https://dev.to/paulike/recursive-helper-methods-4fpd) is tail recursive because there are no pending operations after recursively invoking **isPalindrome** in line 15. However, the recursive **factorial** method (lines 17–22) in [ComputeFactorial.java](https://dev.to/paulike/case-study-computing-factorials-3jc2) is not tail recursive, because there is a pending operation, namely multiplication, to be performed on return from each recursive call.

Tail recursion is desirable: because the method ends when the last recursive call ends, there is no need to store the intermediate calls in the stack. Compilers can optimize tail recursion to reduce stack size.

A nontail-recursive method can often be converted to a tail-recursive method by using auxiliary parameters. These parameters are used to contain the result. The idea is to incorporate the pending operations into the auxiliary parameters in such a way that the recursive call no longer has a pending operation. You can define a new auxiliary recursive method with the auxiliary parameters. This method may overload the original method with the same name but a different signature. For example, the **factorial** method in [ComputeFactorial.java](https://dev.to/paulike/case-study-computing-factorials-3jc2) is written in a tail-recursive way in the code below.

![Image description](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/8unz3xsit44l520blxes.png)

The first **factorial** method (line 5) simply invokes the second auxiliary method (line 6). The second method contains an auxiliary parameter result that stores the **result** for the factorial of **n**. This method is invoked recursively in line 14. There is no pending operation after a call is returned. The final result is returned in line 12, which is also the return value from invoking **factorial(n, 1)** in line 6.
Recursion vs. Iteration
Tags: java, programming, learning, beginners
Published: 2024-07-02 20:28:24

Recursion is an alternative form of program control. It is essentially repetition without a loop. When you use loops, you specify a loop body. The repetition of the loop body is controlled by the loop control  structure. In recursion, the method itself is called repeatedly. A selection statement must be used to control whether to call the method recursively or not. 

Recursion bears substantial overhead. Each time the program calls a method, the system must allocate memory for all of the method’s local variables and parameters. This can consume considerable memory and requires extra time to manage the memory.

Any problem that can be solved recursively can be solved nonrecursively with iterations. Recursion has some negative aspects: it uses up too much time and too much memory. Why, then, should you use it? In some cases, using recursion enables you to specify a clear, simple solution for an inherently recursive problem that would otherwise be difficult to obtain.
Examples are the directory-size problem, the Tower of Hanoi problem, and the fractal problem, which are rather difficult to solve without using recursion.

The decision whether to use recursion or iteration should be based on the nature of, and your understanding of, the problem you are trying to solve. The rule of thumb is to use whichever approach can best develop an intuitive solution that naturally mirrors the problem. If an iterative solution is obvious, use it. It will generally be more efficient than the recursive option.

Recursive programs can run out of memory, causing a **StackOverflowError**. If you are concerned about your program’s performance, avoid using recursion, because it takes more time and consumes more memory than iteration. In general, recursion can be used to solve the inherent recursive problems such as Tower of Hanoi, recursive
directories, and Sierpinski triangles.
à mon égard: From Bug Squasher to Code Conqueror
Published: 2024-07-02 20:05:34

Hey everyone, it's conradgabe here, your friendly neighborhood backend developer! Today, I want to take you on a thrilling adventure – not into the jungle, but into the heart of a particularly nasty backend bug. Buckle up, because we're about to dissect the problem, step-by-step, and emerge victorious (with a newfound appreciation for clean code!).

Now, before we delve into the code caverns, let me tell you a little secret: a crucial part of being a backend developer is selling yourself. It's not just about writing elegant code (though that's definitely important!); it's about showing potential employers how you can solve their problems and navigate even the trickiest situations. That's why I'm incredibly excited to announce that I'm embarking on a new journey with the HNG Internship program @"https://hng.tech/"!

But first, let's conquer that bug!

The Case of the Disappearing Data

Imagine this: you're working on a critical backend system, and suddenly, data starts vanishing like a magician's act. Users report missing information, and panic starts to set in. That's exactly what happened to me recently. Data was being written to the database, but then... poof! Gone without a trace.

Step 1: Embrace the Detective Mindset

The first step in any debugging adventure is to gather clues. I meticulously looked through logs, analyzed code execution flow, and even set up breakpoints to pinpoint exactly where the data was disappearing. It was like being a digital Sherlock Holmes, except with a keyboard instead of a magnifying glass.

Step 2: Interrogate the Suspects (The Code)

After gathering my evidence, it was time to confront the prime suspects – the code itself. Line by line, I went through the data handling process, looking for any logical flaws or race conditions that might be causing the issue. The culprit turned out to be a sneaky bug in a recently implemented caching mechanism. It was caching not just the data itself, but also the fact that it shouldn't be there anymore!

Step 3: Fix the Glitch and Celebrate the Win

With the culprit identified, fixing the bug was a breeze. A minor code modification later, and our missing data reappeared like a rabbit from a hat. The relief was exhilarating, and it served as a powerful reminder of the satisfaction that comes from solving a complex problem.

Why HNG Internship?

Now, let's talk about the HNG Internship. As a developer who thrives on challenges and enjoys collaborating with a talented community, this program is a perfect fit. I'm particularly drawn to the focus on building real-world projects https://hng.tech/internship – the kind that have a tangible impact on people's lives. This internship will be a fantastic opportunity to hone my skills, learn from experienced mentors, and contribute to something meaningful.

I can't wait to embark on this new adventure with HNG and share my experiences with all of you. Stay tuned for more coding conquests, debugging triumphs, and insights from the HNG trenches!

conradgabe out!
Did you know?
Published: 2024-07-02 20:04:36

1.the world's first programmer was a woman.
2.99% of programmers are men and only 1% are women.
3.90% of programmers are under 45 years old.
4.Half of the programmers come to the office in slippers/slippers. That is why they are called "Guys in sandals".
5.Although there are 8,500 programming languages ​​in the world, programmers use only one in 10 of them.
🛡️ Key cybersecurity threats in 2024: What should businesses know?
Tags: cybersecurity, security
Published: 2024-07-02 20:00:09

🔒 Cybersecurity is paramount in today's digital landscape. With new threats emerging daily, it's crucial to stay informed. Some key threats include:
1️⃣ **Phishing** - attackers posing as trusted sources.
2️⃣ **Ransomware** - extortion programs holding data hostage.
3️⃣ **DDoS Attacks** - overwhelming servers with traffic.

🛡️ To protect yourself, start with regular updates and robust passwords. Enhance security with multi-layered measures, educate employees on cybersecurity basics, and utilize modern detection systems to mitigate risks. What security practices does your company follow? Share your insights! hashtag#Cybersecurity hashtag#DataProtection hashtag#TechSecurity
Case Study: Finding the Directory Size
Tags: java, programming, learning, beginners
Published: 2024-07-02 19:54:54

Recursive methods are efficient for solving problems with recursive structures. The preceding examples can easily be solved without using recursion. This section presents a problem that is difficult to solve without using recursion. The problem is to find the size of a directory. The size of a directory is the sum of the sizes of all files in the directory. A directory d may contain subdirectories. Suppose a directory contains files f1, f2, ... , fm and subdirectories d1, d2, ... , dn, as shown in Figure below.

![Image description](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/d8ybjaispqcpc26adhsa.png)

The size of the directory can be defined recursively as follows:

`size(d) = size(f1) + size(f2) + ... + size(fm) + size(d1) + size(d2) + ... + size(dn)`

The **File** class can be used to represent a file or a directory and obtain the properties for files and directories. Two methods in the **File** class are useful for this problem:

- The **length()** method returns the size of a file.
- The **listFiles()** method returns an array of **File** objects under a directory.

The code below gives a program that prompts the user to enter a directory or a file and displays its size.

![Image description](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/eupqla7rvlj9wsrfai05.png)

If the **file** object represents a directory (line 20), each subitem (file or subdirectory) in the directory is recursively invoked to obtain its size (line 23). If the **file** object represents a file (line 26), the file size is obtained and added to the total size (line 27).

What happens if an incorrect or a nonexistent directory is entered? The program will detect that it is not a directory and invoke **file.length()** (line 27), which returns **0**. Thus, in this case, the **getSize** method will return **0**.

To avoid mistakes, it is a good practice to test all cases. For example, you should test the program for an input of file, an empty directory, a nonexistent directory, and a nonexistent file.
Recursive Binary Search
Tags: java, programming, learning, beginners
Published: 2024-07-02 19:44:24

Binary search was introduced in [Searching Arrays](https://dev.to/paulike/searching-arrays-4fb7). For binary search to work, the elements in the array must be in increasing order. The binary search first compares the key with the element in the middle of the array. Consider the following three cases:

- Case 1: If the key is less than the middle element, recursively search for the key in the first half of the array.
- Case 2: If the key is equal to the middle element, the search ends with a match.
- Case 3: If the key is greater than the middle element, recursively search for the key in the second half of the array.

Case 1 and Case 3 reduce the search to a smaller list. Case 2 is a base case when there is a match. Another base case is that the search is exhausted without a match. The code below gives a clear, simple solution for the binary search problem using recursion.

![Image description](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/ia60r73rpf1truzd75d1.png)

The first method finds a key in the whole list. The second method finds a key in the list with index from **low** to **high**.

The first **binarySearch** method passes the initial array with **low = 0** and **high = list.length - 1** to the second **binarySearch** method. The second method is invoked recursively to find the key in an ever-shrinking subarray.
Recursive Selection Sort
Tags: java, programming, learning, beginners
Published: 2024-07-02 19:37:20

Selection sort was introduced in [Sorting Arrays](https://dev.to/paulike/sorting-arrays-25n4). Recall that it finds the smallest element in the list and swaps it with the first element. It then finds the smallest element remaining and swaps it with the first element in the remaining list, and so on until the remaining list contains only a single element. The problem can be divided into two subproblems:

- Find the smallest element in the list and swap it with the first element.
- Ignore the first element and sort the remaining smaller list recursively.

The base case is that the list contains only one element. The code below gives the recursive sort method.

![Image description](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/u4g9d5ogyrh15ksr1p1s.png)

Two overloaded **sort** methods are defined. The first method, **sort(double[] list)**, sorts an array in **list[0..list.length - 1]** and the second method, **sort(double[] list, int low, int high)**, sorts an array in **list[low..high]**. The second method can be invoked recursively to sort an ever-shrinking subarray.
Recursive Helper Methods
Tags: java, programming, learning, beginners
Published: 2024-07-02 19:36:33

Sometimes you can find a solution to the original problem by defining a recursive function to a problem similar to the original problem. This new method is called a recursive helper method. The original problem can be solved by invoking the recursive helper method.

The recursive **isPalindrome** method in [RecursivePalindromeUsingSubstring.java](https://dev.to/paulike/problem-solving-using-recursion-539e) is not efficient, because it creates a new string for every recursive call. To avoid creating new strings, you can use the low and high indices to indicate the range of the substring. These two indices must be passed to the recursive method. Since the original method is **isPalindrome(String s)**, you have to create the new method **isPalindrome(String s, int low, int high)** to accept additional information on the string, as shown in the code below.

![Image description](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/cn5udnezpe5jhtllvm1b.png)

Two overloaded **isPalindrome** methods are defined. The first, **isPalindrome(String s)**, checks whether a string is a palindrome, and the second, **isPalindrome(String s, int low, int high)**, checks whether a substring **s(low..high)** is a palindrome. The first method passes the string **s** with **low = 0** and **high = s.length() – 1** to the second method. The second method can be invoked recursively to check a palindrome in an ever-shrinking substring. It is a common design technique in recursive programming to define a second method that receives additional parameters. Such a method is known as a _recursive helper method_.

Helper methods are very useful in designing recursive solutions for problems involving strings and arrays. The sections that follow give two more examples.
My Story of VC1
Published: 2024-07-02 19:34:07

Now LET'S HOPE IT GOES LIVENow LET'S HOPE IT GOES LIVENow LET'S HOPE IT GOES LIVENow LET'S HOPE IT GOES LIVENow LET'S HOPE IT GOES LIVENow LET'S HOPE IT GOES LIVE
Text
Published: 2024-07-02 19:31:57

Bei der Erstellung meiner Hausarbeit war ich oft überfordert von der Menge an Arbeit. Zum Glück fand ich [https://wirschreiben.ch/hausarbeit/](https://wirschreiben.ch/hausarbeit/). Der Service bot mir nicht nur Hilfe beim Schreiben, sondern auch wertvolle Unterstützung bei der Strukturierung und Formulierung meiner Thesen. Diese individuelle Betreuung half mir, meine Arbeit auf ein höheres Niveau zu bringen und pünktlich abzugeben. Ich kann diesen Service jedem empfehlen, der Unterstützung bei seiner Hausarbeit benötigt.
.Net Tarixi
Published: 2024-07-02 19:21:03


![Image description](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/sr1iy4xwalgepu6f04ae.jpg)

.NET - U Windows, Linux va macOS operatsion tizimlari uchun bepul va ochiq manbali boshqariladigan dasturiy ta'minot ramkasidir. [4] Loyiha birinchi navbatda Microsoft xodimlari tomonidan .NET Foundation yordamida ishlab chiqilgan va MIT litsenziyasi ostida chiqarilgan.

1990-yillarning oxirida Microsoft ".NET platformasi" ning bir qismi sifatida joriy qilingan boshqariladigan kodning ishlash vaqti va dasturlash tilini (C#) ishlab chiqishni boshladi, asosiy ish vaqti va dasturiy ta'minot kutubxonalari .NET Frameworkni tashkil qiladi.

2000-yilda Professional dasturchilar konferensiyasida C# tili e'lon qilinganidan va o'z dasturiy ta'minotining oldindan ko'rish versiyalari mavjudligidan ko'p o'tmay, Microsoft umumiy til infratuzilmasi deb nomlangan ECMA orqali standartlashtirish ustida ish boshladi. Shu bilan birga, kompaniya xususiy dasturiy ta'minot sifatida o'z dasturini ishlab chiqish va qo'llab-quvvatlashni davom ettirdi.

```
.NET Core 1.0 2016 yil 27 iyunda Microsoft Visual Studio 2015 Update 3 bilan birga chiqarildi, bu esa .NET Core dasturini ishlab chiqish imkonini beradi.
.NET Core 1.0.4 va .NET Core 1.1.1 .NET Core Tools 1.0 va Visual Studio 2017 bilan birga 2017-yil 7-martda chiqarildi.
.NET Core 2.0 2017-yilning 14-avgustida Visual Studio 2017 15.3, ASP.NET Core 2.0 va Entity Framework Core 2.0 bilan birga chiqarildi. .NET Core 2.1 2018-yil 30-mayda chiqarilgan.
NET Core 2.2 2018-yil 4-dekabrda chiqarildi.
.NET Core 3 2019-yil 23-sentabrda chiqarildi. NET Core 3 Windows ish stoli ilovalarini ishlab chiqishga yordam beradi va butun asosiy kutubxonaning ish faoliyatini sezilarli darajada yaxshilaydi
2021 yil noyabr oyida Microsoft .NET 6.0.
2022 yil noyabr oyida .NET 7.0.
2023 yil noyabr oyida .NET 8.0 ni chiqardi.
```
Learn Generative AI from Real Product Development Experience
Tags: aws, ai, genai, llm
Published: 2024-07-02 19:16:19

**Learn Generative AI from Real Product Development Experience. Yes, you heard that right!** https://www.meetup.com/meetup-group-komabzoz/events/301904960/ 
Join us every 2nd Thursday of the month to learn Generative AI from actual product development experience. I will share my insights and experiences working on two Generative AI products on the AWS platform using Anthropic, Vector Database, and several other services.
The first product is scheduled to go live by the end of July 2024. This series of hands-on workshops will cover:
- Generative AI
- Prompt Engineering
- Vector Database
- Building Software with Generative AI
- Generative AI and the Future of Work
Come and join me in this jaw-dropping hands-on session on Generative AI. Each month, you'll learn something new and get closer to developing your own product or starting an exciting career in the rapidly growing field of Generative AI.
Don't miss out on this incredible opportunity to dive into the world of Generative AI!
![Image description](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/rvnrrawvkn6q6r6u9wko.png)
Simple thoughts
Published: 2024-07-02 19:09:09

If you read an article that interests you and you enjoy it, or if you watch a video, consider leaving a message or a reaction. I don't consider myself a content creator, but I genuinely enjoy writing my articles and sharing them with others. For me, it's incredibly rewarding if just one person finds my articles helpful or at least interesting to read.

When someone leaves a comment or reacts, it makes all the hours I spend preparing the content feel worthwhile. I know you don't have to do it—it's not mandatory—but next time, think about spending a few seconds to make the hours others spend creating content worth it. ❤️

I'm not the only one who feels this way. I sometimes think my content might not be too interesting, but there's a lot of amazing content out there. So, next time, consider the effort and dedication people put into creating great content. Your engagement will make them happy!
AWS S3 Event Triggering
Tags: aws, lambda, serverless, shellscripting
Published: 2024-07-02 19:05:22


![ARCHITECTURE](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/tts6z1sye7dazsardhmc.png)



**🚀 Excited to share my latest project leveraging AWS to automate event-driven workflows! 🌐
 **

**🔧 Project Overview:** 

I've developed a robust automation script using AWS services to handle events in an S3 bucket seamlessly. This project showcases the power of serverless computing and event-driven architecture.

**📋 Key Features:**

1) AWS Lambda: Dynamically processes events triggered by S3 object creations.
2) SNS Notifications: Sends instant notifications via email on new object uploads.
3) IAM Role Management: Securely manages permissions for Lambda function execution.


![Lambda](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/4hvu1e6c1v5165eetp1u.png)



**📦 Deployment Steps:**

1) AWS Setup: Configured IAM roles and policies for seamless integration.
2) S3 Bucket Configuration: Created a dedicated bucket to store and trigger events.
3) Lambda Function Deployment: Packaged and deployed Python-based Lambda functions.
4) SNS Integration: Integrated SNS for real-time email notifications on S3 events.

**🛠️ Technologies Used:**

1) AWS CLI
2) Bash Scripting

**🔍 Outcome:**

1) Streamlined workflows, enhanced operational efficiency, and improved real-time notifications for critical events.


![Role](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/8medzb4hm5x6vsnm2l9g.png)



**📈 Benefits:**

1) Scalability: Scales effortlessly with increased workload demands.
2) Reliability: Ensures reliable event processing with minimal latency.
3) Cost Efficiency: Optimizes costs with pay-per-use serverless computing.





![Script](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/gyb5qmsqdjq2sp7eypmk.png)