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🧵 JavaScript Interview Prep: Single-Threaded or Multi-Threaded? Event Loop? Async Tasks?

If you’re preparing for a JavaScript interview , chances are you’ll come across questions like: Is JavaScript single-threaded or multi-threaded? How does JavaScript handle asynchronous tasks? What is the event loop, and how does it work? These are fundamental concepts that every JavaScript developer should understand — not only for interviews but also for writing efficient, non-blocking code. Let’s break them down clearly 👇 🧠 Question 1: Is JavaScript Single-Threaded or Multi-Threaded? The short answer is: 👉 JavaScript is single-threaded. That means it can execute only one task at a time on a single main thread . This single thread handles: Code execution Function calls Event handling DOM updates (in browsers) So, when you run JavaScript, it processes your code line by line , synchronously . If one piece of code takes too long to finish, the rest of the program must wait — this is called blocking . ⚙️ Question 2: How Does JavaScript Handle Asynchronous Task...
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SwiftUI - Tutorial 2 - 🧵 Understanding @MainActor in SwiftUI — A Beginner’s Guide

  🧵 Understanding @MainActor in SwiftUI — A Beginner’s Guide When you start building iOS apps with SwiftUI , sooner or later you’ll run into this warning: ⚠️ “Publishing changes from background threads is not allowed; make sure to publish values from the main thread (via operators like receive(on:)) on model updates.” Sounds scary? Don’t worry 🙂 This is exactly where @MainActor comes to the rescue. 🔹 What is @MainActor ? In Swift, an actor is like a traffic controller that makes sure only one thing accesses a resource at a time. The @MainActor is a special actor provided by Swift that guarantees the code it marks will always run on the main thread . And that’s important because in iOS development: UI updates must always happen on the main thread. 🔹 Why do we need @MainActor in SwiftUI? SwiftUI automatically refreshes the UI when your @Published properties change. But if those changes happen on a background thread (for example, after fetching data from ...
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SwiftUI - Tutorial 1 - 🔥 Understanding Data Flow in SwiftUI: @StateObject, @ObservedObject, and @EnvironmentObject

🔥 Understanding Data Flow in SwiftUI: @StateObject , @ObservedObject , and @EnvironmentObject When you first start learning SwiftUI, all these property wrappers can feel confusing: @State @Binding @StateObject @ObservedObject @EnvironmentObject Don’t worry 🙌 This guide will explain the three most important ones for managing data models in SwiftUI: @StateObject @ObservedObject @EnvironmentObject And we’ll also touch on the other related wrappers ( @State , @Binding , @AppStorage , etc.). 🟢 1. @StateObject – When the View Creates the Object Use @StateObject when your view is responsible for creating and owning the object . SwiftUI will keep this object alive as long as the view exists. ✅ Example: class CounterViewModel : ObservableObject { @Published var count = 0 func increment () { count += 1 } } struct CounterView : View { @StateObject private var vm = CounterViewModel () // View owns it var body: some Vie...
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From Mobile Developer to AI Expert: Your Complete Roadmap

  From Mobile Developer to AI Expert: Your Complete Roadmap Are you a mobile app developer wondering how to jump into the exciting world of Generative AI? You're not alone! As AI becomes more integrated into mobile apps, developers like us need to level up our skills. Here's a simple, step-by-step roadmap I've put together to help you transition smoothly. Why Mobile Developers Should Learn AI Before we dive in, let's talk about why this matters. AI isn't just a buzzzy trend – it's becoming essential for mobile apps. Think about: Smart photo editing apps Voice assistants in mobile apps Personalized content recommendations AI-powered chatbots and customer support Automatic language translation The good news? Your mobile development background gives you a huge advantage! Phase 1: Getting Started (Month 1-2) Learn the Basics Don't worry – you don't need a PhD in computer science. Start with these beginner-friendly resources: Understanding AI F...
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🔐 How to Use OWASP Dependency-Check for Android and iOS Projects

When developing mobile apps, it’s crucial to keep third-party dependencies secure. OWASP Dependency-Check is an open-source tool that helps detect known vulnerabilities (CVEs) in software libraries. In this article, we’ll explore how to use it for both Android and iOS projects and integrate it into your CI/CD pipeline like Jenkins. ✅ What is OWASP Dependency-Check? OWASP Dependency-Check is a Software Composition Analysis (SCA) tool. It scans your project’s dependencies and checks for known vulnerabilities using data from the National Vulnerability Database (NVD) . 🟢 Using OWASP Dependency-Check for Android Android apps typically use Gradle , which means you can scan .jar and .aar files from your build outputs. 🔧 Step-by-Step Guide 1️⃣ Install Dependency-Check CLI You can download the latest release from GitHub: 👉 https://github.com/jeremylong/DependencyCheck/releases If you're on macOS, you can also use Homebrew: bash Copy brew install dependency-check 2️⃣ Run...
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🔐 How to Use TruffleHog to Secure Your Ionic App from Leaked Secrets

 When developing a cross-platform Ionic app, one of the most overlooked but critical areas is security . Accidentally committing secrets like API keys or credentials into Git can lead to serious breaches. That’s where TruffleHog comes in — a powerful, open-source tool that scans your code and Git history to detect secrets. ✅ Why Use TruffleHog? Detects hardcoded secrets using regex + entropy (ML-based) scanning Scans the entire Git history and current codebase Easily integrates with CI/CD tools like Jenkins or GitHub Actions Helps you stay compliant and secure 🚀 Steps to Use TruffleHog in Your Ionic App 🧩 Step 1: Install TruffleHog 🟢 On macOS/Linux/Windows (using pip): pip install trufflehog Need Python first? Install with: brew install python # for macOS 🧪 Step 2: Scan Your Ionic Project Repo Navigate to your Ionic project folder: cd your-ionic-app/ 🔍 To scan the full Git history: trufflehog git file://. --json --report=trufflehog-report.jso...
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🔐 How to Use GitLeaks in an Ionic App to Detect Secrets

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If you're building an Ionic app , keeping your codebase secure is essential. One powerful way to ensure that secrets like API keys, tokens, and passwords don’t accidentally make it into version control is by using GitLeaks . GitLeaks is a fast, lightweight, open-source tool that scans your Git repository for hardcoded secrets. It works seamlessly with Ionic apps, even though it's framework-agnostic. ✅ Steps to Use GitLeaks in an Ionic App 🧩 1. Install GitLeaks 🟢 For macOS (using Homebrew): brew install gitleaks 🟠 For Windows/Linux: Download the latest release from GitLeaks GitHub: 👉 https://github.com/gitleaks/gitleaks/releases 🐳 Or Use Docker: docker run -- rm -v $( pwd ):/path zricethezav/gitleaks detect -- source =/path 🧪 2. Run GitLeaks Manually on Your Ionic Project Navigate to your Ionic app root folder and run: cd your-ionic-app/ gitleaks detect -- source . --report-path=gitleaks-report.json ✅ What it does: Scans the current working directory for secrets...
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