teleren/devto huggingface dataset:
How does Javascript work under the hood?
Tags: javascript, webdev, coding, programming
Published: 2024-07-06 12:54:45

Okay, So today we shall learn about How Javascript works.

Firstly, JavaScript is a lightweight, cross-platform, single-threaded, and interpreted compiled programming language.

So, Everything inside Javascript happens inside a place known as execution context.

Now the question arises in your mind what is execution context?

Execution Context:-

The environment that handles the code transformation and code execution by scanning the script file (JS file).

![Execution context](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/p1fg6tcydte6twiv2t7m.png)

As shown above, the Execution context is divided into 2 parts.

1. Memory component (variable environment)
This is a place where all the variables and functions are stored in key-value pairs.

2. Code component (thread of execution)
This is a place where code is executed one line at a time.

Now lets see how execution context works?

consider the below example

```
var n = 3;

function cube(num) {
  var result = num * num * num;
  return result;
}

var cube3 = cube(n);
var cube5 = cube(5);
```

Now execution context is created with memory and code components as shown in the above image

The first phase is the memory creation phase and the second phase is the code execution phase.

### Memory creation phase

In this phase, JS will allocate the memory to all the variables and functions

  - allocate memory to n variable and store value as undefined.
  - allocate memory to the cube function and store the whole 
    function code.
  - allocate memory to cube3 variable and store value as undefined.
  - allocate memory to cube5 variable and store value as undefined.

Now after the memory creation let's see how the code is executed in the code execution phase.

## Code execution phase

Javascript goes through the whole JS program line by line and executes the code.

- assign value 2 to n 

now it goes to the line where the square function is invoked. so whenever any function is invoked a new execution context is created same as mentioned in the image. 

so for the square(n) a new execution context is created with memory and code components

here again, memory is allocated to num and as undefined and then it runs the code execution phase for the function in which it assigns num a value i.e. passed from square(n) where n = 3. so num will assign 3. After that ans will be assigned num * num * num i.e. 27. 

Now whenever anything is returned from the function its value is assigned to the variable that invoked the function. here in our case, cube3 will have 27 as ans is assigned 27.

Note here that whenever an execution context is done with its task it is deleted from the call stack.

The same thing happens for the 2nd function cube 5.

Thank you so much for being with me.
Let's understand the differences: href="", href="#", and href="javascript:void(0)"
Tags: html, javascript
Published: 2024-07-06 12:51:46



## Empty HREF: href=""
Using an empty href attribute (href="") reloads the current page. This is like clicking the refresh button of the browser.

## href="#"
The href=”#” attribute makes the page scroll to the top. If you don’t want this, you can stop the behavior with JavaScript:

```html
<a href=”#” onclick=”return false;”>Hey</a>
<!--! and there ane many ways with js to achive this -->
href="javascript:void(0)"
```
Sometimes you will see href="javascript:void(0);" inside an `<a>` tag. This makes a link that does nothing when clicked. Other ways to do this are:

```html
href="javascript:{}"
href="javascript:null"
```
These links do nothing it’s best to avoid them.

## href="#any_id"
The href="#any_id" attribute does nothing unless have an element with an ID of any_idon the page. By clicking the link will scroll to that element.
To avoid any scroll use a different id value that doesn't exist on the page.

**Best Practices:**
Use a Button or Span: If your link doesn’t navigate anywhere, you can use <button> or <span> instead of an `<a>` element as well as you can style these elements as needed using raw CSS or CSS framework.

Lastly, let’s summarize these

- `href="#"` scrolls the current page to the top.
- `href="javascript:void(0)"` does nothing.
- `href="#any_id"` does nothing unless there is an element with the specific ID.

_And finally,
I’m appreciative that you read my piece._
BitPower Security Overview
Published: 2024-07-06 12:44:31

What is BitPower?
BitPower is a decentralized lending platform that uses blockchain and smart contract technology to provide secure lending services.
Security Features
Smart Contract
Automatically execute transactions and reduce human intervention.
Open source code, anyone can view it.
Decentralization
Users interact directly with the platform without intermediaries.
Funds flow freely between user wallets.
Asset Collateral
Borrowers use crypto assets as collateral to ensure loan security.
When the value of the collateralized assets decreases, the smart contract automatically liquidates to protect the interests of both parties.
Data Transparency
All transaction records are public and can be viewed by anyone.
Users can view transactions and assets at any time.
Multi-Signature
Multi-Signature technology is used to ensure transaction security.
Advantages
High security: Smart contracts and blockchain technology ensure platform security.
Transparency and Trust: Open source code and public transaction records increase transparency.
Risk Control: Collateral and automatic liquidation mechanisms reduce risks.
Conclusion
BitPower provides a secure and transparent decentralized lending platform through smart contracts and blockchain technology. Join BitPower and experience secure lending services!@BitPower
Latest Newsletter: Surrounded By Paperclip Maximisers (Issue #171)
Tags: javascript, tech, webdev, discuss
Published: 2024-07-06 12:44:13

---
title: Latest Newsletter: Surrounded By Paperclip Maximisers (Issue #171)
published: true
description: US EU French and UK Politics, music industry & AI, money problems in developing nations
tags: javascript, tech, webdev, discuss
---
Latest Newsletter: Surrounded By Paperclip Maximisers (Issue #171)

US EU French and UK Politics, music industry & AI, money problems in developing nations

https://markjgsmith.substack.com/p/saturday-6th-july-2024-surrounded

Would love to hear any comments and feedback you have.

[@markjgsmith](https://twitter.com/markjgsmith)
Bảo Mật Website Là Gì? Cách Để Bảo Mật Website Hiệu Quả
Tags: website, digitalmarketing, seo, terus
Published: 2024-07-06 12:38:43


![Image description](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/evvuag316loffw55khre.jpg)
Bảo mật website là một khái niệm rất quan trọng trong thời đại số ngày nay. Nó đề cập đến các biện pháp và quy trình được áp dụng để bảo vệ website và thông tin của người dùng khỏi các mối đe dọa như hack, tấn công từ chối dịch vụ (DDoS), mã độc và các hình thức xâm phạm bảo mật khác.

Một [chính sách bảo mật website](https://terusvn.com/thiet-ke-website-tai-hcm/) là một tài liệu mô tả các biện pháp bảo vệ website và quyền riêng tư của người dùng. Nó thường bao gồm các thông tin như: loại thông tin được thu thập, cách thông tin được sử dụng và chia sẻ, quyền của người dùng đối với thông tin cá nhân, và những hành động sẽ được thực hiện để bảo vệ dữ liệu.

Có nhiều lý do quan trọng để xây dựng chính sách bảo mật website. Trước hết, nó giúp tạo dựng niềm tin của khách hàng, đặc biệt là trong các giao dịch trực tuyến. Thứ hai, nhiều ứng dụng và dịch vụ nhất định yêu cầu người dùng chấp nhận chính sách bảo mật trước khi sử dụng. Cuối cùng, chính sách bảo mật website cung cấp sự bảo vệ pháp lý cho doanh nghiệp.

Một chính sách bảo mật website hiệu quả cần bao gồm các thông tin như: loại thông tin được thu thập, chính sách cookie, các trường hợp dữ liệu có thể được chia sẻ, quyền của người dùng đối với dữ liệu cá nhân, yêu cầu về độ tuổi, và thông tin liên hệ khi có lo ngại về quyền riêng tư.

Ngoài việc xây dựng chính sách bảo mật, có một số biện pháp khác để bảo mật website hiệu quả hơn, bao gồm: luôn cập nhật phần mềm, sử dụng mật khẩu mạnh, triển khai mã hóa SSL/TLS, thường xuyên backup website, và sử dụng tường lửa ứng dụng web (WAF).

Đối với các [website thương mại điện tử](https://terusvn.com/thiet-ke-website-tai-hcm/), yêu cầu về an ninh bảo mật còn nghiêm ngặt hơn, bao gồm: bảo mật giao dịch tài chính, bảo vệ dữ liệu khách hàng, và triển khai các biện pháp ngăn chặn các cuộc tấn công trực tuyến.

Việc bảo mật website mang lại nhiều lợi ích lâu dài cho doanh nghiệp. Nó giúp tăng niềm tin của khách hàng, tuân thủ các quy định pháp lý, bảo vệ danh tiếng và tránh các rủi ro tài chính do vi phạm bảo mật. Trong thời đại số, bảo mật website là một yếu tố then chốt để duy trì sự thành công và phát triển của doanh nghiệp trong dài hạn.

Tìm hiểu thêm về [Bảo Mật Website Là Gì? Cách Để Bảo Mật Website Hiệu Quả](https://terusvn.com/thiet-ke-website/bao-mat-website-se-co-loi-ich-gi/)

Digital Marketing:

·        [Dịch vụ Facebook Ads](https://terusvn.com/digital-marketing/dich-vu-facebook-ads-tai-terus/)

·        [Dịch vụ Google Ads](https://terusvn.com/digital-marketing/dich-vu-quang-cao-google-tai-terus/)

·        [Dịch vụ SEO Tổng Thể](https://terusvn.com/seo/dich-vu-seo-tong-the-uy-tin-hieu-qua-tai-terus/)

Thiết kế website:

·        [Dịch vụ Thiết kế website chuẩn Insight](https://terusvn.com/thiet-ke-website/dich-vu-thiet-ke-website-chuan-insight-chuyen-nghiep-uy-tin-tai-terus/)

·        [Dịch vụ Thiết kế website](https://terusvn.com/thiet-ke-website-tai-hcm/)
BitPower Security Overview
Published: 2024-07-06 12:34:42

What is BitPower?
BitPower is a decentralized lending platform that uses blockchain and smart contract technology to provide secure lending services.
Security Features
Smart Contract
Automatically execute transactions and reduce human intervention.
Open source code, anyone can view it.
Decentralization
Users interact directly with the platform without intermediaries.
Funds flow freely between user wallets.
Asset Collateral
Borrowers use crypto assets as collateral to ensure loan security.
When the value of the collateralized assets decreases, the smart contract automatically liquidates to protect the interests of both parties.
Data Transparency
All transaction records are public and can be viewed by anyone.
Users can view transactions and assets at any time.
Multi-Signature
Multi-Signature technology is used to ensure transaction security.
Advantages
High security: Smart contracts and blockchain technology ensure platform security.
Transparency and Trust: Open source code and public transaction records increase transparency.
Risk Control: Collateral and automatic liquidation mechanisms reduce risks.
Conclusion
BitPower provides a secure and transparent decentralized lending platform through smart contracts and blockchain technology. Join BitPower and experience secure lending services!@BitPower
Building a Sleek C++ Calculator: Harnessing the Power of Modular Functions
Tags: cpp, programming
Published: 2024-07-06 12:30:51

In the world of programming, creating practical applications that demonstrate elegance and efficiency is a testament to skillful craftsmanship. One such project that exemplifies this is building a calculator using C++ and modular functions. In this blog post, we'll explore the journey of constructing a functional calculator from scratch, focusing on the principles of modular programming.

**Why Build a Calculator?**
While a calculator may seem like a simple tool, its construction offers valuable insights into fundamental programming concepts such as functions, control flow, and data handling. By building a calculator, we not only practice these concepts but also learn how to structure our code in a modular and reusable manner—a cornerstone of software engineering.

**Getting Started: Preparation and Environment Setup**
Before diving into the implementation, it's essential to set up your C++ development environment. Choose an IDE or text editor with a C++ compiler that suits your preferences. This ensures a smooth development process and efficient coding workflow.

**Step-by-Step Guide to Building the Calculator**
Designing the Functionality: Begin by outlining the basic functionalities your calculator will support. This typically includes arithmetic operations such as addition, subtraction, multiplication, and division. Plan how users will interact with the calculator through a simple user interface.

- **Implementing Modular Functions:** Modular programming involves breaking down complex tasks into smaller, independent modules or functions. Create separate functions for each arithmetic operation to maintain clarity and reusability in your code.

- **Handling User Input and Output:** Develop mechanisms to receive user input for numbers and operation selection. Use conditional statements (if-else or switch-case) to direct the program flow based on user choices. Ensure robust error handling to manage unexpected inputs effectively.

- **Testing and Validation:** Once the core functionalities are implemented, rigorously test the calculator to ensure accuracy and reliability. Verify edge cases such as division by zero or non-numeric inputs. Debug any issues to achieve a stable and user-friendly application.

**Conclusion**
Building a C++ calculator using modular functions not only enhances your programming skills but also reinforces essential software development principles. By organizing code into reusable modules, you promote maintainable and scalable application development practices.

Ready to embark on this coding journey? Explore further by implementing additional features or refining the calculator's UI to expand its functionality and usability.

Read more:
https://mokshelearning.blogspot.com/2024/07/Build-a-Sleek-Calculator-with-Modular-Functions.html]
Essential Tools for Mastering Data Science and Machine Learning
Tags: machinelearning, python, datascience, data
Published: 2024-07-06 12:30:35

A good craftsman needs good tools. This is also true in Data Science and Machine Learning. There are three main categories of tools:

- **Integrated Tools** that include everything necessary for a project: loading data, analyzing it, creating models, evaluating them, deploying, and generating reports.

- **Auto ML Tools** that simplify the process for non-experts by automating most of the different phases.

- **Development Tools** which allow for more customization, provided you code everything, for example in Python.

![Image description](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/m8a24p1b0gjt3i7y0hif.png)

**1. Integrated Tools**
There are many tools in the first category, each requiring specific learning to use them effectively. Additionally, each has its strengths and weaknesses, so it is important to choose the right software based on the intended goal. Examples include: Dataiku DSS, SAS, QlikView, Tableau, Power BI, etc.
Some are very statistics-oriented (SAS), others focus on data visualization (Tableau), but all cover at least part of the process. These are mainly downloadable applications accessible via a web interface.
Most of these software tools are paid. Free versions often exist, but they are limited in functionality and usually restricted to personal use. To be compliant, it is important to contact the main providers.

**2. Auto ML**
Auto ML tools are generally accessible via a web interface. The user inputs their raw data and desired task: classification, regression, etc. The application then takes care of the rest: selecting data preparation methods, models, and parameters. The best-created model is then returned to the user. These tools have the huge advantage of being usable without any knowledge of Machine Learning. However, they lack flexibility and are often disliked by Data Scientists who prefer to have control over their modeling process.
However, they allow for a quick initial model, and a Data Scientist can then spend time on other models and optimizing the Auto ML results. Most cloud providers have their own tools.

![Image description](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/7goostvghz263pkjqmt1.png)

**3. Development Tools**
It is entirely possible to code Machine Learning algorithms in all programming languages. Many frameworks or libraries exist, ready to be incorporated into projects. Classic development tools are therefore perfectly usable. Code editors like Atom, Visual Studio Code, or Sublime Text can all serve a project.
Moreover, code has the advantage of being easily shared and synchronized among multiple people thanks to version control systems like Git. Additionally, CI/CD (Continuous Integration/Continuous Deployment) tools like GitLab CI, Jenkins, or Ansible can facilitate deployment and updates. Again, each cloud provider offers additional tools, such as the series of Amazon Web Services (AWS) services starting with "Code": CodeCommit, CodeBuild... or Azure DevOps.
These tools are increasingly used today.
UI/UX Là Gì? Thiết Kế UI Và UX Khác Nhau Như Thế Nào?
Tags: website, digitalmarketing, seo, terus
Published: 2024-07-06 12:30:04


![Image description](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/i3tw0p43lpfk772ccl31.jpg)
UI đề cập đến mọi thành phần hình ảnh, giao diện mà người dùng nhìn thấy và tương tác khi sử dụng một sản phẩm hoặc dịch vụ, cụ thể là website. Đây là phần trực quan và bề ngoài của sản phẩm, bao gồm các chi tiết như màu sắc, bố cục, nút bấm, menu, biểu tượng... Mục tiêu chính của UI là tạo ra một giao diện người dùng thân thiện và nổi bật.

Trong khi đó, UX tập trung vào việc [thiết kế website với trải nghiệm người dùng tối ưu](https://terusvn.com/thiet-ke-website-tai-hcm/), nhằm đem lại cảm giác thoải mái, dễ sử dụng và hài lòng cho người dùng khi tương tác với wesbite. UX nghiên cứu hành vi, nhu cầu và mong đợi của người dùng để từ đó xây dựng một trải nghiệm tối ưu, tạo ra giá trị cho người dùng. Nó bao gồm các khía cạnh như dễ sử dụng, tính hiệu quả, tính thẩm mỹ, tính hữu dụng...

Mặc dù UI và UX có những điểm khác biệt, nhưng chúng lại đóng vai trò bổ sung cho nhau. Một [website có thiết kế UI đẹp mắt](https://terusvn.com/thiet-ke-website-tai-hcm/) nhưng lại không mang lại trải nghiệm tốt cho người dùng thì sẽ không thể thành công. Ngược lại, một sản phẩm có UX tuyệt vời nhưng giao diện UI lại kém hấp dẫn cũng khó đạt được sự chấp nhận rộng rãi. Vì thế, việc kết hợp cả hai yếu tố UI và UX một cách hài hòa và hiệu quả là hết sức quan trọng.

Trong quá trình thiết kế website, nhóm UI/UX thường sẽ bao gồm các chuyên gia như: nhà thiết kế giao diện, nhà nghiên cứu UX, nhà phát triển front-end... Họ cùng phối hợp với các bên liên quan khác để xây dựng một website hoàn hảo từ cả hai khía cạnh UI và UX. Vai trò của nhóm UI/UX là vô cùng quan trọng, quyết định đến thành công hay thất bại của sản phẩm.

UI và UX là hai khái niệm khác biệt nhưng lại hỗ trợ và bổ sung cho nhau. Sự kết hợp giữa thiết kế giao diện người dùng (UI) và trải nghiệm người dùng (UX) là chìa khóa để tạo ra những sản phẩm và dịch vụ, đặc biệt là website thực sự thành công, đem lại giá trị gia tăng cho người dùng.

Tìm hiểu thêm về [UI/UX Là Gì? Thiết Kế UI Và UX Khác Nhau Như Thế Nào?](https://terusvn.com/thiet-ke-website/ui-ux-la-gi/)

Digital Marketing:

·        [Dịch vụ Facebook Ads](https://terusvn.com/digital-marketing/dich-vu-facebook-ads-tai-terus/)

·        [Dịch vụ Google Ads](https://terusvn.com/digital-marketing/dich-vu-quang-cao-google-tai-terus/)

·        [Dịch vụ SEO Tổng Thể](https://terusvn.com/seo/dich-vu-seo-tong-the-uy-tin-hieu-qua-tai-terus/)

Thiết kế website:

·        [Dịch vụ Thiết kế website chuẩn Insight](https://terusvn.com/thiet-ke-website/dich-vu-thiet-ke-website-chuan-insight-chuyen-nghiep-uy-tin-tai-terus/)

·        [Dịch vụ Thiết kế website](https://terusvn.com/thiet-ke-website-tai-hcm/)
Understanding the Unary Plus Operator (+) in JavaScript
Tags: webdev, javascript
Published: 2024-07-06 12:28:26

JavaScript is full of interesting and useful operators, one of which is the unary plus operator (+). You might have come across it in code snippets like +new Date(), but do you know what it really does? In this post, we'll explore the unary plus operator and its various applications.

**What is the Unary Plus Operator?**
The unary plus operator (+) is used to convert its operand into a number. This operator is particularly handy when you need to ensure that a value is treated as a numeric type.

**Example: Converting a Date to a Timestamp**
Consider the following example:
The unary plus operator (+) is used to convert its operand into a number. This operator is particularly handy when you need to ensure that a value is treated as a numeric type.

Example: Converting a Date to a Timestamp
Consider the following example:

```
+new Date(); // Returns the current timestamp in milliseconds
```
Here, new Date() creates a new Date object representing the current date and time. The unary plus operator converts this Date object to its numeric representation, which is the number of milliseconds since January 1, 1970, 00:00:00 UTC (the Unix epoch).

**Other Uses of the Unary Plus Operator**
The unary plus operator isn't just limited to dates. It can be used to convert various types of values to numbers.

- Converting Strings to Numbers

```
let str = "123";
let num = +str; // num is now 123 (number)
```

- Converting Boolean Values to Numbers

```
let boolTrue = true;
let boolFalse = false;
let numTrue = +boolTrue;   // numTrue is now 1
let numFalse = +boolFalse; // numFalse is now 0
```

- Converting null to a Number

```
let nullValue = null;
let numNull = +nullValue; // numNull is now 0
```

- Converting undefined to a Number

```
let undefinedValue = undefined;
let numUndefined = +undefinedValue; // numUndefined is NaN
```

- Converting an Object to a Number

```
let obj = {};
let numObj = +obj; // numObj is NaN, because {} cannot be converted to a number
```

- Converting Arrays to Numbers

```
let emptyArray = [];
let singleElementArray = [5];
let multipleElementArray = [1, 2, 3];

let numEmptyArray = +emptyArray; // numEmptyArray is 0
let numSingleElementArray = +singleElementArray; // numSingleElementArray is 5
let numMultipleElementArray = +multipleElementArray; // numMultipleElementArray is NaN
```

- Using in Expressions

```
let a = "5";
let b = 10;
let result = +a + b; // result is 15, because +a converts "5" to 5
```

**Conclusion**
The unary plus operator (+) is a versatile tool in JavaScript that allows for quick type conversion to a number. Whether you're dealing with strings, booleans, null, undefined, or even arrays, this operator can help ensure your values are in the numeric format you need.

Next time you see +new Date() or need to convert a value to a number, you'll know exactly what the unary plus operator is doing and how to use it effectively in your code.

Happy coding!
BitPower Security Overview
Published: 2024-07-06 12:26:14

What is BitPower?
BitPower is a decentralized lending platform that uses blockchain and smart contract technology to provide secure lending services.
Security Features
Smart Contract
Automatically execute transactions and reduce human intervention.
Open source code, anyone can view it.
Decentralization
Users interact directly with the platform without intermediaries.
Funds flow freely between user wallets.
Asset Collateral
Borrowers use crypto assets as collateral to ensure loan security.
When the value of the collateralized assets decreases, the smart contract automatically liquidates to protect the interests of both parties.
Data Transparency
All transaction records are public and can be viewed by anyone.
Users can view transactions and assets at any time.
Multi-Signature
Multi-Signature technology is used to ensure transaction security.
Advantages
High security: Smart contracts and blockchain technology ensure platform security.
Transparency and Trust: Open source code and public transaction records increase transparency.
Risk Control: Collateral and automatic liquidation mechanisms reduce risks.
Conclusion
BitPower provides a secure and transparent decentralized lending platform through smart contracts and blockchain technology. Join BitPower and experience secure lending services!