teleren/devto huggingface dataset:
Mastering AWS ☁️ #3: Amazon EBS (Elastic Block Store) for AWS Certification Exams (through Mind map) 🌎
Tags: aws, webdev, cloud, devops
Published: 2023-08-26 12:24:26

**Mind Map: Amazon EBS (Elastic Block Store)**

```
     Amazon EBS
      /     |     \
Volume   Volume    Volume
 Types   Lifecycle  Encryption
 /     \            /      \
SSD    HDD         Creation  At Rest
/   \   /  \        /  \     \
GP2  IO1 ST1 SC1   Snapshots KMS
```

- **Amazon EBS (Elastic Block Store)**:
  - Block-level storage volumes for EC2 instances.
  - Supports various volume types and features.

**Volume Types**:
- **General Purpose SSD (gp2)**:
  - Balanced performance for a wide range of workloads.
- **Provisioned IOPS SSD (io1)**:
  - High-performance storage for critical applications.
- **Throughput Optimized HDD (st1)**:
  - Low-cost storage for frequently accessed, throughput-intensive workloads.
- **Cold HDD (sc1)**:
  - Low-cost storage for infrequently accessed, large-data workloads.

**Volume Lifecycle**:
- **Volume Creation**:
  - Create volumes during EC2 instance launch or independently.
  - Choose size, type, and Availability Zone.

- **Snapshots**:
  - Point-in-time copies of EBS volumes.
  - Used for backup, recovery, and cloning.
  - Incremental and stored in Amazon S3.

**Volume Encryption**:
- **At Rest Encryption**:
  - Encrypts data at rest to protect sensitive information.
  - Uses AWS Key Management Service (KMS) keys.

- **In-Transit Encryption**:
  - EBS data is encrypted in transit between the instance and storage.

**Use Cases**:
- **SSD (General Purpose) - gp2**:
  - Boot volumes for EC2 instances.
  - Low-latency, balanced performance.

- **SSD (Provisioned IOPS) - io1**:
  - Databases with high I/O requirements.
  - Critical applications demanding consistent performance.

- **HDD (Throughput Optimized) - st1**:
  - Big data, data warehousing, log processing.
  - Frequent data access with high throughput.

- **HDD (Cold) - sc1**:
  - Infrequent access, archival storage.
  - Long-term backups, cost-effective storage.

**Tips for the Exam**:
- Understand the differences between EBS volume types and when to use each.
- Familiarize yourself with snapshot creation and how they're used for backup and recovery.
- Know the benefits of EBS encryption and how to manage encryption keys with KMS.

Use this comprehensive mind map as a reference while studying Amazon EBS for the AWS exams. It covers the volume types, lifecycle, encryption, and use cases associated with EBS, helping you grasp the key concepts effectively.
Create Artistic Sketches from Photos using Python
Tags: programming, python, opencv, algorithms
Published: 2023-08-26 12:21:21

While exploring Computer Vision and Image Processing recently, I stumbled upon something fascinating! 💡I have already done some basic image processing in C before, but Python adds a whole new layer of excitement to it. With just a few lines of Python code, you can turn any image into a sketch. 🖌️✨

Here's a quick rundown of what I've done:

✅ Imported essential libraries
✅ Loaded and displayed the image
✅ Converted RGB to Gray scale
✅ Transformed the gray image into an inverted one
✅ Applied Gaussian blur for that artistic touch
✅ Inverted the blurred image (yes, twice!)
✅ Wrapped it all up neatly in one function
✅ Voila! Extracted a sketch from the image using the function

Curious to learn more? I've detailed my process in this article [https://lnkd.in/dpi4bEk9] where I spill all the beans. 📝

But wait, there's more! I'm planning a series on image processing using Python, where I'll dig deeper into every aspect. Stay tuned for more exciting updates on [https://lnkd.in/dmJ5eaZ5] where I'll be publishing these articles. ✒️
![Image description](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/jviwfwsns5yrhmmzcgux.png)
Mastering AWS ☁️ #1: DynamoDB - Unleashing the Power of AWS NoSQL Database for AWS Certification Exams (through Mind maps) 🌎
Tags: devops, cloud, aws, webdev
Published: 2023-08-26 11:36:20

Mind maps to help you remember key concepts about Amazon DynamoDB for the AWS Certified Solutions Architect - Associate (SAA-C02) exam:

**Mind Map 1: DynamoDB Basics**

```
       DynamoDB
         /     \
   Tables     Items
   /    \       /  \
Partition  Attributes
 Key
```

- DynamoDB is organized into tables, containing items with attributes.
- Each table must have a primary key, which can be a partition key or a composite key.
- Partition keys determine data distribution and scalability.
- Items have attributes, and attributes can be of various data types.

**Mind Map 2: Capacity and Scaling**

```
    Capacity Units
     /        \
Read (RCUs)  Write (WCUs)
  |             |
Provisioned   Provisioned
 & Auto       & Auto
```

- Capacity Units: RCUs (Read Capacity Units) and WCUs (Write Capacity Units).
- Provisioned Capacity: Set initial capacity and auto scaling adjusts as needed.

**Mind Map 3: Secondary Indexes**

```
    Secondary Indexes
   /           \
Global       Local
Secondary    Secondary
Index        Index
```

- Secondary indexes enable querying on non-primary key attributes.
- Global Secondary Indexes: Query across all partitions.
- Local Secondary Indexes: Query within a partition.

**Mind Map 4: Additional Features**

```
       DynamoDB
    /     |      \
Streams   DAX   Encryption
                 /       \
      At Rest (KMS)    In Transit (TLS/SSL)
```

- DynamoDB Streams: Capture data changes for processing.
- DAX: In-memory cache for improved read performance.
- Encryption: Data is encrypted at rest using AWS KMS and in transit using TLS/SSL.

**Mind Map 5: Use Cases**

```
     Use Cases
   /     |     \
Scalability   Low Latency
              /        \
     High Availability   Flexible Schema
```

- DynamoDB's automatic scaling suits variable workloads.
- Low latency ideal for applications needing quick responses.
- High availability with data replication across AZs.
- Flexible schema for diverse data types.

These mind maps offer a concise way to remember the core concepts of Amazon DynamoDB. Study and review each branch of the mind maps to solidify your understanding for the SAA-C02 exam. Good luck!
How to install make on windows
Tags: make, makefile, tutorial, windows
Published: 2023-08-26 11:32:15

Installing `make` on Windows involves using tools like MinGW or Cygwin to provide a Unix-like environment that includes the `make` utility. Here's a step-by-step guide using MinGW:

1. **Install Chocolatey (Optional but Recommended):**
   Chocolatey is a package manager for Windows that makes it easy to install software from the command line.

   Open a Command Prompt with administrator privileges and run the following command to install Chocolatey:

   ```bash
   Set-ExecutionPolicy Bypass -Scope Process -Force; [System.Net.ServicePointManager]::SecurityProtocol = [System.Net.ServicePointManager]::SecurityProtocol -bor 3072; iex (iwr https://chocolatey.org/install.ps1)
   ```

2. **Install MinGW:**
   MinGW (Minimalist GNU for Windows) is a development environment that provides a Unix-like command-line environment on Windows.

   Run the following command in the Command Prompt to install MinGW using Chocolatey:

   ```bash
   choco install mingw -y
   ```

3. **Add MinGW Bin Directory to PATH:**
   After installing MinGW, you need to add its `bin` directory to your system's PATH environment variable.

   - Right-click on "This PC" or "My Computer" and select "Properties."
   - Click on "Advanced system settings."
   - In the "System Properties" window, click on the "Environment Variables" button.
   - Under the "System variables" section, find and select the "Path" variable, then click the "Edit" button.
   - Click the "New" button and add the path to the MinGW `bin` directory (usually `C:\MinGW\bin`).
   - Click "OK" to close all the windows.

4. **Verify Installation:**
   To verify that `make` has been successfully installed, open a new Command Prompt and run the following command:

   ```bash
   make --version
   ```

   You should see the version information of the `make` utility if the installation was successful.

That's it! You've now successfully installed `make` on your Windows system using MinGW. You can now use the `make` command to build projects that use Makefiles for compilation and other tasks.
Meadowbrook's showcase video 🎥
Tags: webdevshowcase, codeinaction, webdevportfolio, innovativewebdev
Published: 2023-08-26 11:12:34

Check out my latest web development showcase video! 🌟 Elevating #Meadowbrook's digital landscape one line of code at a time. 🖥️👨‍💻 

https://www.youtube.com/watch?v=bSq3YELK5ww
One Minute: Benthos
Tags: dataengineering, lowcode, api, oneminute
Published: 2023-08-26 11:05:34

_<abbr title="Fancy stream processing made operationally mundane">Benthos</abbr>_ is an open-source declarative processor for ETL / ELT batch and stream data pipelines.

**Concept:** A processing pipeline is composed from inputs, processors, and outputs configured in a [YAML](https://yaml.org/) file.
**Inputs:** https://www.benthos.dev/docs/components/inputs/about
**Processors:** https://www.benthos.dev/docs/components/processors/about
**Outputs:** https://www.benthos.dev/docs/components/outputs/about
**Other Features:** [HTTP API](https://www.benthos.dev/docs/components/http/about), [Caches](https://www.benthos.dev/docs/components/caches/about), [Buffers](https://www.benthos.dev/docs/components/buffers/about), [Metrics](https://www.benthos.dev/docs/components/metrics/about), [Tracers](https://www.benthos.dev/docs/components/tracers/about), [Logger](https://www.benthos.dev/docs/components/logger/about), [Bloblang Mapping Language](https://www.benthos.dev/docs/guides/bloblang/about)

**Modes:** Single or [Many Streams](https://www.benthos.dev/docs/guides/streams_mode/about)
**Platforms:** x86-64, armv7, arm64
**Systems:** Linux, Darwin, FreeBSD, OpenBSD, Windows
**Written In:** [Go](https://go.dev)
**License:** [MIT License](https://mit-license.org)

**Website:** https://www.benthos.dev
**Documentation:** https://www.benthos.dev/docs/about
**Repository:** https://github.com/benthosdev/benthos
**Container:** https://hub.docker.com/r/jeffail/benthos
**Discord:** https://discord.gg/6VaWjzP
Emerging Computer Storage Technologies
Published: 2023-08-26 11:02:04



Storage technology in the realm of computers has undergone radical transformations over the years. The focus has been on achieving faster access times, greater reliability, enhanced durability, and increased storage capacity. Here's a closer look at some of the latest trends and innovations in computer storage:

1. 3D NAND Flash: Traditional flash memory, or NAND flash, has been a standard for storage, especially in SSDs. The 3D NAND technology stacks memory cells vertically in several layers, thus offering higher capacities and better performance while consuming less power.

2. Optane Memory (Intel): Developed by Intel, Optane bridges the gap between RAM and storage drives. It is faster than traditional SSDs but slower than RAM. It acts as a cache memory, storing frequently used data, making data access faster for the CPU.

3. QLC (Quad-Level Cell) SSDs: Storing four bits per cell, QLC SSDs can store more data than their TLC (Triple-Level Cell) counterparts. However, they might offer a bit less endurance and performance but are suitable for read-heavy workloads.

4. Storage-Class Memory (SCM): Positioned between DRAM and SSDs in terms of performance, SCM is non-volatile (retains data when power is off) but can be accessed at speeds that rival traditional RAM.

5. Helium-Filled Hard Drives: By using helium, which is less dense than air, these drives can pack more platters into the same space. This results in higher storage capacities with lower power consumption and less wear.

6. DNA Data Storage: An avant-garde approach where digital data is converted into DNA sequences. This technique promises an extremely high data density, with the potential of storing an exabyte of data in a few cubic millimeters.

7. Magnetic Tape Storage: While not a "new" technology, tape storage has evolved. Modern magnetic tapes can store vast amounts of data and are often used for long-term archival purposes.

8. Holographic Storage: Still in developmental stages, it uses holograms to store data on photosensitive disks. The advantage? Potentially massive storage capacities.

9. Racetrack Memory: Utilizes the spin of electrons to move data around a nanowire "racetrack", promising faster and more durable storage than traditional hard drives.

10. Memristors: Acting as resistors with memory, memristors can remember their state even when turned off, offering faster and more durable storage capabilities.

The future of computer storage is exciting, with ongoing research and advancements promising solutions that are faster, more reliable, and offering increased capacities. As data continues to grow exponentially in our digital world, these evolving storage technologies will play a crucial role in managing and accessing this vast digital wealth.

Data collected by [Arad computer](https://aradcomputer.net/)
Golang 1.21 is here (Part 1)
Tags: go, programming, tutorial
Published: 2023-08-26 10:57:27

Golang 1.21 arrived on August 8th with some performance improvements, the addition of native packages, and functions that will enhance your code syntax and productivity in your daily work. Below, I've selected the a fews topics along with examples of how to use them. You can follow the complete change log [here](https://tip.golang.org/doc/go1.21).

Let's start with the changes in the language itself, where utility functions were implemented: **min**, **max** and **clear**. 

## Min and Max

```
func main() {
	minInt := min(3, 2, 1, 4)
	minFloat := min(4.0, 2.0, 3.0, 1.0)
	minString := min("ab", "a", "abcd", "abc")

	fmt.Println("Min Integer:", minInt)
	fmt.Println("Min Float:", minFloat)
	fmt.Println("Min String:", minString)

	fmt.Println("==================")
        
	maxInt := max(4, 2, 3, 1)
	maxFloat := max(1.0, 4.0, 2.0, 3.0)
	maxString := max("a", "ab", "abc", "abcd")

	fmt.Println("Max Integer:", maxInt)
	fmt.Println("Max Float:", maxFloat)
	fmt.Println("Max String:", maxString)

}


```
_With the result_

```
Min Integer: 1
Min Float: 1
Min String: a
==================
Max Integer: 4
Max Float: 4
Max String: abcd
```

What's interesting is that with the addition of these two helper functions, Generics are used as input, and the type of the Generics is [cmp.Ordered](https://pkg.go.dev/cmp#Ordered), which basically applies to all comparable types in the Go language.

You can see the Min-Max code [here](https://gist.github.com/pedrobertao/ecb14746900c8730e6c066ca2cf2ebeb)

## Clear

According to the documentation,

> The new clear function deletes all elements from a map or zeroes all elements of a slice.

```
func main() {
	intSlice := []int{1, 2, 3}
	floatSlice := []float64{1.0, 2.0, 3.0}
	stringSlice := []string{"a", "b", "c"}
	mapString := map[string]string{
		"Name": "Pedro",
		"Age":  "20",
	}

	clear(intSlice)
	clear(floatSlice)
	clear(stringSlice)
	clear(mapString)

	fmt.Println("Int Slice", intSlice)
	fmt.Println("Float Slice", floatSlice)
	fmt.Println("String Slice", stringSlice)
	fmt.Println("Map", mapString)

}
```

_With the result_

```
Int Slice [0 0 0]
Float Slice [0 0 0]
String Slice [  ]
Map map[]
```
As we can see, it not only clears the Slices, but also makes their sizes equal and replaces the values with default ones. In the case of the Map, after using the Clear function, it's as if it were an empty Map.

You can check the Clear code [here](https://gist.github.com/pedrobertao/6ec6f4942744036afeb1e05b6d76d177)

For the next parts I will cover some new cool Log, Cmp and Maps features that were added.]

[Part two](https://dev.to/pedrobertao/golang-121-is-here-part-2-5b66)
Orbit-Space: Elevating React Apps with Stunning 3D Space Backgrounds
Tags: webdev, react, npm, threejs
Published: 2023-08-26 10:47:19

Hi! Just created a React component, that gives you a good-looking 3d space background.

![Image description](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/c62jw762yq2k0f76y95c.gif)
please check this out!
Installation:
`npm install orbit-space`

How to use it: https://www.npmjs.com/package/orbit-space

Then just pass your content to children. But make sure not to place anything on top of this background that could fully cover it.





And... That's about it! Thanks!
Different Ways to Optimize Image in Angular Application
Published: 2023-08-26 10:32:11

Optimizing images before uploading them in an Angular application can significantly improve performance and reduce bandwidth usage. There are various techniques and libraries available to achieve this. Here are some different ways to optimize images before upload in an Angular application:

### 1. Image Cropping and Resizing:
Implement image cropping and resizing functionality to allow users to select and upload only the necessary portions of the image. This can be achieved using libraries like ngx-image-cropper.

### 2. Client-Side Image Compression:

Use client-side image compression libraries like ng2-image-compress or ngx-image-compress to reduce the image size before uploading. These libraries allow you to compress images without significant loss of quality.

### 3. Cloud-Based Image Optimization:
Leverage cloud-based image optimization services like
**Cloudinary** or **Imgix**. These services offer automatic image optimization, resizing, and caching, reducing the burden on your Angular application.

### 4. Base64 Encoding:
Convert the image to a Base64-encoded string before uploading. This can be useful for small images or thumbnail previews, as it eliminates the need for a separate image upload request.

### 5. Lazy Loading and Progressive Loading:
Utilize lazy loading techniques to load images only when they are about to be displayed. Additionally, consider using progressive image loading, where a low-quality placeholder image is initially loaded and then replaced with the higher-quality image once it's available.

### 6. WebP Format:
Encourage users to upload images in the WebP format, which typically offers better compression and quality compared to traditional formats like JPEG and PNG. However, make sure to check browser support for WebP.

### 7. Image Exif Data Stripping:
Remove unnecessary Exif data from images before uploading, as it can add to the image size without providing any visible benefit

### 8. Web Workers:
Use Web Workers to perform image processing tasks in the background, reducing the impact on the main thread and enhancing the application's responsiveness.

### 9. Minimize Image Dimensions:
If your application requires specific image dimensions, inform users to upload images of the recommended size to avoid unnecessary resizing on the server-side

### 10. File Type and Size Validation:
Implement validation to check the file type and size before uploading. This prevents users from uploading large, uncompressed images or unsupported file formats.

Remember to strike a balance between image quality and size reduction to ensure a good user experience while maintaining reasonable loading times. Additionally, consider the server-side optimizations for handling and storing the uploaded images efficiently.

This article is originally posted over [jsonworld](jsonworldcom)
Saving and Loading User Preferences in Swift
Tags: swift, programming, tutorial
Published: 2023-08-26 10:22:09

In this unit, we will explore how to manage user preferences in a weather application. User preferences are a crucial part of any application as they allow users to customize the app according to their needs and provide a personalized user experience.

## Understanding User Preferences

In the context of a weather application, user preferences can include settings like temperature unit (Celsius or Fahrenheit), location settings (use current location or manually enter a location), and more. These preferences can significantly affect how the user interacts with the app and the information they receive.

## Creating a Settings Page

The first step in managing user preferences is to create a settings page where users can adjust their preferences. This page can include switches, sliders, and other UI elements that allow users to customize their app experience. For example, you might include a switch for users to toggle between Celsius and Fahrenheit or a text field for users to enter a preferred location.

## Saving User Preferences with UserDefaults

Once you have a settings page, you need a way to save the user's preferences. In Swift, you can use the UserDefaults system to store small amounts of data like user preferences.

Here's an example of how you can save a user's preference for temperature unit:
```swift
let defaults = UserDefaults.standard
defaults.set(isCelsius, forKey: "TemperatureUnit")
```
In this code, isCelsius is a Boolean that represents whether the user prefers Celsius (if isCelsius is true) or Fahrenheit (if isCelsius is false).

## Loading and Applying User Preferences

After saving user preferences, you need to load these preferences when the app launches and apply them throughout the app. You can also load these preferences every time the settings page appears.

Here's how you can load the temperature unit preference:

let defaults = UserDefaults.standard
let isCelsius = defaults.bool(forKey: "TemperatureUnit")
Once you've loaded the user's preferences, you can use this information to customize the app's behavior. For example, you can use the `isCelsius` value to determine how to display temperatures throughout the app.

## Updating Weather Data Based on User Preferences

Finally, user preferences should affect how the app fetches and displays weather data. For example, if a user enters a preferred location, the app should fetch weather data for that location instead of the user's current location. Similarly, the app should display temperatures in the user's preferred temperature unit.

By managing user preferences, you can provide a more personalized and user-friendly experience in your weather application.