teleren/devto huggingface dataset:
Increase z-index of fabric control handle - fabricjs library
Tags: canvas, fabricjs, fabric, konvajs
Published: 2023-08-12 22:04:22

Increase z-index of fabric control handle - fabricjs library
------------------------------------------------------------

Fabric.js is a powerful and versatile JavaScript library for working with HTML5 canvas. It provides a simple and intuitive way to create and manipulate graphical objects, making it a popular choice among developers for building interactive applications. One of the key features of Fabric.js is the control handle, which allows users to resize and rotate objects on the canvas. However, sometimes you may encounter a situation where the control handle is not visible or is being obscured by other elements on the page. In such cases, increasing the z-index of the control handle can be a handy solution.

The control handle in Fabric.js is represented by the `fabric.Control` class. By default, the control handle has a z-index value of 1, which means it is positioned above other elements with a lower z-index. To increase the z-index of the control handle, you can modify the `zIndex` property of the control handle instance.

Let's say you have a fabric object called `myObject` and you want to increase the z-index of its control handle. You can achieve this by accessing the control handle using the `getControls()` method and then setting the `zIndex` property to a higher value, like so:

 

    
    const controlHandle = myObject.getControls().tl; // Assuming you want to modify the top-left control handle
    controlHandle.zIndex = 999; // Setting a higher z-index value
    canvas.renderAll(); // Re-render the canvas to reflect the changes
        

 

In the above code snippet, we first retrieve the top-left control handle of `myObject` using the `getControls()` method. We then set the `zIndex` property of the control handle to 999, which is a higher value than the default z-index. Finally, we call the `renderAll()` method on the canvas to update the display and reflect the changes.

Increasing the z-index of the control handle ensures that it is positioned above other elements on the page, making it more visible and accessible to users. This can be particularly useful in scenarios where the control handle is being obscured by other graphical elements or overlays.

So, the next time you find yourself struggling to locate the control handle in your Fabric.js application, don't forget to increase its z-index! With just a few lines of code, you can make it stand out and ensure a better user experience.

### References:

*   [Fabric.js Official Website](https://fabricjs.com/)
*   [Fabric.js Documentation](https://docs.fabricjs.com/)
Working with JavaScript Local Storage
Tags: javascript, react, localstorage, softwaredevelopment
Published: 2023-08-12 21:58:45

Local storage is an important aspect of JavaScript and can be used in different scenarios. First, What is local storage: Local storage is part of the web storage API and it provides a way to store data in the browser.

Local storage allows you to store little sizes of data as key-value pairs, and it only allows storage of String data type, other data types such as numbers, objects, arrays, and booleans need to be serialized and deserialized.

There are various local storage methods used in storing, getting, deleting, and clearing data in local storage, some of which are mentioned below :
- getItem
- setItem
- removeItem.

**- setItem method:** This is used to store key-value pairs in the local storage, taking in two parameters {the key and value}. The key serves as an identifier of the value, and the value can be in the form of any valid Javascript data type. e.g. _**[localStorage.setItem(‘mykey’, ‘myValue’)].**_

**- getItem method:** This is used to retrieve the value associated with any specific key from the local storage. It takes the key as a parameter and returns its corresponding value. e.g **_[localStorage.getItem(‘myKey’)]._**

**- removeItem method**: This is used to remove or delete key-value pair from the local storage based on the specified key. It takes the key as a parameter and removes the corresponding key-value pair from the local storage if it exists. e.g **_[localStorage.removeItem(‘myKey’)]._**

There are many use cases for local storage and it is quite useful and will come in handy. FOLLOW FOR MORE CONTENT.

On Twitter: [theonlyabdull](https://twitter.com/TheOnlyAbdull)
How to Load Assets in Reactjs on Mac
Tags: react, macosx, javascript
Published: 2023-08-12 21:47:46

Unlike loading _assets_ in **Windows** where you can keep the **assets folder** in the **src folder**, accessing the _image_ using its _path_

eg: /assets/logo.png

**In Mac**

1. 
Move the **assets folder** into the public folder.

![Image description](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/b27pmtw51psmbr9l4za8.png)

2. 
Access _image_ using **./assets/{image_name.png}** ,replace _{image_name.png}_ with your _image name_

eg: background-image: url(‘./assets/{image_name.png}’)

     <img src=’./assets/{image_name.png}’ alt=’image’ />
Best practices when working with React Native
Tags: javascript, react, reactnative, developers
Published: 2023-08-12 21:28:43

1. **Organized Project Structure:** Maintain a clear and organized project structure to make code easier to navigate and maintain.

2. **Componentization:** Break the UI into reusable components. This makes it easier to maintain and expand the application.

3. **State Management:** Use state management libraries such as Redux or Context API to control global application state in a predictable and scalable way.

4. **Conditional Rendering:** Use conditional rendering to display different parts of the interface based on the application's state.

5. **Performance Optimization:** Avoid unnecessary renderings using PureComponent or memoization. Use FlatList for large lists and VirtualizedList for better scrolling performance.

6. **Styles and CSS:** Use flexible styles like StyleSheet for efficient styling and avoid inline styles.

7. **Efficient Debugging:** Use debugging tools like the React Native Debugger and enable hot-reloading to speed up the development process.

8. **Error Handling:** Implement proper error handling to ensure the application handles exceptions properly and provides clear feedback to the user.

9. **Unit and Integration Tests:** Write tests to verify the correct functioning of application components and data flows.

10. **Internationalization (i18n):** Plan for internationalization from the start, allowing the application to be easily adapted for different languages ​​and regions.

11. **Complete Documentation:** Document code, components, and workflows to help team members understand and collaborate on the project.

12. **Updates and Dependencies:** Keep your dependencies up to date and follow best practices for updating React Native and other libraries.

13. **Security:** When handling sensitive data or communications, follow security best practices such as encryption and proper authentication.

14. **Accessibility:** Design and implement your application with accessibility in mind, ensuring that everyone can use the application, regardless of its limitations.

15. **Cross-Platform Development:** Make the most of being able to develop for iOS and Android using a shared codebase, but also be prepared to deal with platform-specific differences where necessary.
Calculating Duration for Each Day and Each Name in MySQL
Tags: mysql, softwaredevelopment, duration, calculation
Published: 2023-08-12 21:04:53

Calculating Duration for Each Day and Each Name in MySQL
--------------------------------------------------------

When working with data in MySQL, it is often necessary to calculate durations or time differences between different events. This can be particularly useful in scenarios where you want to track how long each day or each name has been active. In this article, we will explore how to calculate durations for each day and each name in MySQL.

### Calculating Duration for Each Day

To calculate the duration for each day, we can make use of the `DATEDIFF()` function in MySQL. This function allows us to calculate the difference in days between two dates. We can combine it with the `GROUP BY` clause to group the data by day and then calculate the duration for each day.

Here's an example query:

 

    
    SELECT DATE(date_column) AS day, SUM(duration_column) AS total_duration
    FROM table_name
    GROUP BY DATE(date_column);
      

 

In this query, `date_column` represents the column that contains the date, and `duration_column` represents the column that contains the duration. The `DATE()` function is used to extract only the date part from the datetime column.

### Calculating Duration for Each Name

Similarly, to calculate the duration for each name, we can use the `GROUP BY` clause along with the `SUM()` function. This allows us to group the data by name and calculate the total duration for each name.

Here's an example query:

 

    
    SELECT name_column, SUM(duration_column) AS total_duration
    FROM table_name
    GROUP BY name_column;
      

 

In this query, `name_column` represents the column that contains the names, and `duration_column` represents the column that contains the duration.

### Conclusion

Calculating durations for each day and each name in MySQL can be easily achieved using the `DATEDIFF()` function and the `GROUP BY` clause. These calculations can provide valuable insights into the activity levels for different time periods or individuals.

So go ahead and unleash the power of MySQL to calculate durations in your data. With a little SQL magic, you'll be able to track time like a pro!

### References:

*   [MySQL DATEDIFF() Function](https://dev.mysql.com/doc/refman/8.0/en/date-and-time-functions.html#function_datediff)
*   [MySQL GROUP BY Modifiers](https://dev.mysql.com/doc/refman/8.0/en/group-by-modifiers.html)
*   [MySQL GROUP BY Functions](https://dev.mysql.com/doc/refman/8.0/en/group-by-functions.html)
React Custom Hook: useDebounce
Tags: webdev, javascript, programming, react
Published: 2023-08-12 21:00:00

In this article series, we embark on a journey through the realm of custom React hooks, discovering their immense potential for elevating your development projects. Our focus today is on the "useDebounce" hook, one of the many carefully crafted hooks available in the collection of React custom hooks.

Github: https://github.com/sergeyleschev/react-custom-hooks

```javascript
import { useEffect } from "react"
import useTimeout from "../useTimeout/useTimeout"

export default function useDebounce(callback, delay, dependencies) {
    const { reset, clear } = useTimeout(callback, delay)
    useEffect(reset, [...dependencies, reset])
    useEffect(clear, [])
}
```

The **useDebounce** hook leverages the useTimeout hook internally to delay the execution of a callback function until a specified delay has passed. By doing so, it prevents frequent updates caused by rapid input changes or repeated events, allowing for smoother interactions and reduced resource consumption.

One of the main advantages of useDebounce is its simplicity and flexibility. By wrapping your callback function, delay duration, and any dependencies in this custom hook, you can effortlessly implement debouncing functionality without cluttering your component code. The hook takes care of managing the timeout and clears it when necessary, ensuring that the callback is only triggered after the specified delay and with the latest dependencies.

Where can you use useDebounce? The possibilities are endless! This custom hook is particularly beneficial in scenarios where you need to handle user input, such as search bars or form fields, where you want to delay the execution of an action until the user has finished typing or interacting. It's also useful for optimizing network requests, ensuring that requests are sent only after the user has stopped typing or selecting options.

```javascript
import { useState } from "react"
import useDebounce from "./useDebounce"

export default function DebounceComponent() {
    const [count, setCount] = useState(10)
    useDebounce(() => alert(count), 1000, [count])
    return (
        <div>
            <div>{count}</div>
            <button onClick={() => setCount(c => c + 1)}>Increment</button>
        </div>
    )
}
```
In the example above, we showcase the power of _useDebounce_ by implementing a simple counter component called DebounceComponent. Each time the user clicks the "Increment" button, the count state updates. However, instead of immediately alerting the count value, we debounce the alert function using useDebounce. The count value will only be alerted after a 1-second delay, effectively preventing excessive alerts when the button is clicked rapidly.

Full Version | React Custom Hooks: 
https://dev.to/sergeyleschev/supercharge-your-react-projects-with-custom-hooks-pl4
Exploring the Power of React Hooks in Modern Web Development
Tags: react, hooks, webdev, javascript
Published: 2023-08-12 20:20:33


![React Hooks image](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/vh8cgco4tzrf1ebhh871.jpeg)

React Hooks have revolutionized the way developers approach building user interfaces in React applications. Introduced in React 16.8, hooks provide a cleaner, more efficient way to manage stateful logic and side effects, replacing class components in many cases.

**Significance of React Hooks:**

React Hooks address various pain points associated with class components, such as the complexity of managing state and lifecycle methods. They promote functional programming practices and enable the reuse of stateful logic across different components. This translates to more concise and readable code, fostering better maintainability and collaboration among developers.

**Practical Application:**

Hooks offer a practical way to encapsulate state and behavior in functional components. The most common hooks include `useState` for managing state, `useEffect` for handling side effects, and `useContext` for accessing context within components. These hooks collectively enhance code organization and readability by eliminating the need for separating logic into different lifecycle methods.

**Implementation with Code Examples:**

Let's dive into a simple example using the `useState` hook. Imagine a task tracking application:

```jsx
import React, { useState } from 'react';

function TaskList() {
  const [tasks, setTasks] = useState([]);
  
  const addTask = (newTask) => {
    setTasks([...tasks, newTask]);
  };
  
  return (
    <div>
      <ul>
        {tasks.map((task, index) => (
          <li key={index}>{task}</li>
        ))}
      </ul>
      <button onClick={() => addTask('New Task')}>Add Task</button>
    </div>
  );
}
```

**Real-World Use Case:**

Consider a social media platform where users can like posts. The `useEffect` hook can be employed to update the like count when a post is liked:

```jsx
import React, { useState, useEffect } from 'react';

function Post({ postId }) {
  const [likes, setLikes] = useState(0);
  
  useEffect(() => {
    // Simulate fetching likes from a server
    const fetchLikes = async () => {
      const response = await fetch(`/api/posts/${postId}/likes`);
      const data = await response.json();
      setLikes(data.likes);
    };
    fetchLikes();
  }, [postId]);
  
  return (
    <div>
      <p>Likes: {likes}</p>
      <button onClick={() => setLikes(likes + 1)}>Like</button>
    </div>
  );
}
```

In conclusion, React Hooks have brought a paradigm shift to React development, enhancing code readability, reusability, and maintainability. By simplifying state management and side effect handling, hooks empower developers to build more efficient and expressive components for modern web applications.
SwiftUI Overlay within NavigationView z-index layering issues
Tags: ios, swift, xcode, swiftui
Published: 2023-08-12 20:03:42

SwiftUI Overlay within NavigationView z-index layering issues

SwiftUI is a powerful framework for building user interfaces across Apple platforms. It offers a declarative syntax and a range of built-in views and controls. One of the key features of SwiftUI is the ability to overlay views on top of each other using the overlay modifier. However, when using overlay within a NavigationView, developers may encounter z-index layering issues.

Let's say we have a NavigationView with a list of items:

`NavigationView { List(items) { item in NavigationLink(destination: DetailView(item: item)) { Text(item.name) } } }`

In the DetailView, we want to overlay a button on top of an image:

`struct DetailView: View { var item: Item var body: some View { Image(item.imageName) .resizable() .aspectRatio(contentMode: .fit) .overlay( Button(action: { // Button action }) { Text("Click Me") .foregroundColor(.white) .padding() .background(Color.blue) .cornerRadius(10) } .padding(), alignment: .bottomTrailing ) } }`

At first glance, everything seems fine. However, when running the app, we notice that the button is not tappable. It appears that the image is blocking the button.

The issue here is that SwiftUI's overlay modifier does not respect the z-index of the views within a NavigationView. By default, the overlay modifier places the overlayed view on top of the base view. In our case, the image is on top of the button, making it unresponsive.

To solve this problem, we can use the `.zIndex()` modifier to explicitly set the z-index of the views:

`struct DetailView: View { var item: Item var body: some View { Image(item.imageName) .resizable() .aspectRatio(contentMode: .fit) .zIndex(0) .overlay( Button(action: { // Button action }) { Text("Click Me") .foregroundColor(.white) .padding() .background(Color.blue) .cornerRadius(10) } .padding() .zIndex(1), alignment: .bottomTrailing ) } }`

By setting the z-index of the image to 0 and the z-index of the button to 1, we ensure that the button is placed on top of the image, making it tappable again.

It's important to note that the z-index values are relative to each other within the overlay. A higher z-index value means the view will be placed on top of views with lower z-index values.

SwiftUI's overlay modifier is a powerful tool for creating complex user interfaces. However, when using it within a NavigationView, developers should be aware of the z-index layering issues. By explicitly setting the z-index values of the views, we can ensure that the overlayed views are displayed correctly.

References:

*   [SwiftUI overlay documentation](https://developer.apple.com/documentation/swiftui/overlay)
*   [SwiftUI zIndex documentation](https://developer.apple.com/documentation/swiftui/view/zindex(_:)-6m6e)
submit nft drop
Published: 2023-08-12 19:55:39

Bermuda Unicorn is a **[submit nft drop](https://bermudaunicorn.com/explore-rising-nft-artists-and-learn-how-to-submit-nft-drop/)** for buying, selling, and creating NFTs. We offer a wide variety of NFTs from art, music, and collectibles to gaming and virtual worlds. We also offer a variety of features to make it easy to buy, sell, and create NFTs, including:

A user-friendly interface

A secure platform

Low fees
A wide range of payment options

A vibrant community of NFT collectors and creators

If you're looking for a safe and secure place to buy, sell, and create NFTs, then Bermuda Unicorn is the place for you.

Follow Us More Links :-

Follow Us On Facebook :- **[https://www.facebook.com/bermudaunicorn](https://www.facebook.com/bermudaunicorn)**

Follow Us On Instagram :- **[https://www.instagram.com/bermudaunicorn/](https://www.instagram.com/bermudaunicorn/)**

Email Us :- care@bermudaunicorn.com
Unlocking Innovation: Join us at ETHToronto with XDC Network!
Tags: ethereum, ethtoronto, xdc, event
Published: 2023-08-12 19:18:35

🌟 Join us for an extraordinary event! 🚀

📢 Calling all blockchain enthusiasts and tech aficionados! You're cordially invited to the much-awaited ETHToronto event, a celebration of community and innovation. As the proud Tera Byte sponsor, XDC Network is excited to bring you an unforgettable experience.

🗓️ Mark your calendars for the event, just 3 days away starting on August 15! Get ready to immerse yourself in the cutting-edge world of blockchain and connect with the vibrant XDC Community and Ecosystem at Booth no. 15.

🎉 Let's come together to explore, learn, and revolutionize the future of technology. See you there!
pg betflik เครดิต ฟรี 50 ล่าสุด
Published: 2023-08-12 19:15:16

Hi, my name is Emi, I'm an actor, actress, and I live in Trafo, Alsancak, Kocasinan Blv., 38110 Kocasinan/Kayseri, Türkiye. I'm a big fan of fitness, technology, and I'm also interested in music and entrepreneurship. You can visit my website by clicking the button.[https://betflikguru1.blogspot.com/2023/07/blog-post.html](betflikguru)
Rescript Http Error Response
Published: 2023-08-12 18:37:50

Hi

Have you ever wondered how would you get Http Error Response out of the Js.Exn.t. Js.Exn.t is intentionally opaque. We need to cast to the appropriate object type. In this particular case we are trying to get Http Error response 


```
module Response = {
  type t = {
    status: int
  }
}
@get external getResponse: Js.Exn.t => option<Response.t> = "response"
let handleError = (error: Js.Exn.t) => {
  let response = getResponse(error)
  switch response {
    | Some(response) => Js.log2("response status", response.status)
    | None => Js.log2("no response available")
  }
}

exception MyError(string)


// Now assume that we are trying to fetch 
open Promise
fetch("")
->then(todos => resolve(todos))
->catch(error => {
  handleError(error)
let err = switch e {
  | MyError(str) => "found MyError: " ++ str
  | _ => "Some unknown error"
  }

  // Here we are using the same type (`t<result>`) as in the previous `then` call
  Error(err)->resolve
})
```
 
Hope you found it useful.