Programming & Tech

I was running Claude Code, Codex, and Gemini CLI in three different terminals, plus VS Code, Chrome, Postman, and TablePlus — just to ship one feature. So I built 1DevTool: one window per project, every AI agent in one place, everything persists.

I was tired of paying $20+/month for Vercel and Railway, but also tired of self-hosted panels eating 2GB of RAM on my $5 VPS. So I built Server Compass — a desktop app that connects to any VPS over SSH and gives you the full power of a managed PaaS, with zero server overhead and one-time pricing.

I hadn't written blog posts for a long time and realized I was too dependent on AI. To rebuild my writing habit and think more clearly, I decided to build a writing platform: write.rocks.

Detailed walkthrough of rebuilding a blog from scratch with vibe coding, from data migration to implementing new features, helping readers understand the personal blog development process.

Exploring contrarian thinking in an era where everyone is rushing into AI, examining niche opportunities in fintech and crypto payments that could provide sustainable long-term value.

An analysis of the intersection between Game Theory and artificial intelligence, explaining how AI is changing Nash equilibrium principles and optimal strategies. The post includes real-world examples of applications in business, transportation, and cybersecurity.

Honest reflections on the value of manual writing in the AI era. While AI can create content efficiently, this post affirms the personal connection and unique value that humans bring to their writing.

Detailed analysis of the drawbacks and risks of Vibe Coding - the approach of letting AI write code without human oversight, helping readers understand the challenges in applying AI technology to software development.

A detailed analysis of how 'vibe coding' - a programming method based on describing intent rather than writing code directly - will democratize software development, helping readers better understand technology trends and their impact on the IT industry.

Introducing Vibe Coding - a new approach to software development, emphasizing the mindset shift and approach to building software, helping readers understand modern technology development trends.

A practical guide sharing 7 tips for using AI (like Claude.ai and ChatGPT) to better understand whitepapers and technical documents of blockchain projects. From requesting simple summaries, explain-like-I'm-a-kid explanations, clarifying questions, using examples, creating hypothetical scenarios, converting terminology, to comparing multiple sources - helping investors make smarter crypto investment decisions.

An analysis of why Stacks has potential to lead the Bitcoin Layer 2 market with the upcoming Nakamoto upgrade. The author explains Bitcoin's original limitations, the need for Layer 2, Stacks' technological advantages like Proof of Transfer, Clarity language, and the ability to expand the Bitcoin ecosystem with DeFi, NFT, and smart contract applications, along with market cap growth potential analysis.

An analysis of Micro SaaS development trends in 2024, explaining the concept and differences between traditional SaaS and Micro SaaS. The author presents characteristics of Micro SaaS businesses, why 2024 is the breakout moment for this model, and guides on building a successful Micro SaaS with nocode technology. Also shares real experience and lessons from the author's own Micro SaaS projects.

A guest post from Hoang BA - a blockchain business analyst with over 2 years of experience in DEX, User Identity, and Token Swap projects. The author shares a comprehensive process for building decentralized applications (dApps) on blockchain, from technology selection, smart contract development to interface design and product deployment.

Introducing GPTs feature from ChatGPT that allows users to create custom AI assistants based on their expertise and publish them on the ChatGPT Store.

Sharing experiences from recording an English course about Bubble.io, including choosing Screen.Studio software for screen recording and automatic subtitle generation, lessons learned about setting goals and defining target students before selecting content, and the benefits of challenging yourself to overcome fears and complete projects. The author also introduces the 'Build your first web app in Bubble for beginners' course.

Day 7 progress in the challenge to create an English course in 2 weeks. The author introduces Fine-tuning ChatGPT - a feature that lets you create custom ChatGPT versions based on provided data, especially useful for customer support chatbots. The post also discusses adjusting the demo app and course direction, along with challenges using OpenAI's API in Vietnam.

Sharing progress on developing a SaaS AI demo app for a Bubble course, focusing on Prompt Engineering - the technique of writing effective prompts for AI. The author introduces the standard prompt structure with 6 parts: Persona, Context, Task, Format, Examplar, and Tone, along with the idea and mockup for an app helping users write better prompts, solving a problem many people face when using AI.

A comprehensive Q&A about Generative AI, covering effective prompt writing techniques, ways to make money with AI, alternative platforms to Claude AI, the cost of training large models, and important concepts like BERT, pre-trained models, and related ethical issues.

Discover how to earn income from blockchain grant programs. This post explains what blockchain grants are, why blockchain projects need them, and shares real experience from someone who successfully participated in these programs. A practical guide for developers wanting to leverage opportunities in the cryptocurrency market.

The journey of migrating my website from Notion to Ghost CMS and the reasons behind this decision. This post analyzes limitations of using Notion for websites with many posts, while introducing Ghost advantages like speed, friendly interface, great SEO, and built-in membership features. A long-term solution for those wanting to build professional blogs.

A detailed guide on how to list and sell BRC20 tokens on the Unisat.io exchange. I'll walk you through the two main steps: splitting your NFT into smaller parts to specify the amount of tokens to sell, and executing the transaction on the marketplace, with step-by-step screenshots.

Introduction to Stacks - a Layer 2 solution for Bitcoin bringing smart contracts, NFTs, and decentralized applications without changing the original blockchain, plus how Proof of Transfer works.

Detailed guide on Bitcoin Ordinals, how NFTs work on Bitcoin, and steps to mint NFTs on the Bitcoin blockchain using Taproot-supporting wallets.

A guide on creating websites from Notion without coding through a 4-video mini-course. Sharing benefits of using Notion as CMS like great writing experience, fast page load with Next.js, and cost savings. Provides ready-made templates, website editing guide with Github and GitPod, and how to deploy on Vercel.

Introducing a smart contract programming course with the Clarity language on Stacks blockchain. The course includes chapters on Stacks blockchain overview, programming a donation smart contract, creating tokens and NFTs, and deploying smart contracts. Suitable for those wanting to learn about blockchain technology built on Bitcoin.

Sharing the development journey of StaticWeb.Studio, a nocode tool that failed after 200 hours of work with zero revenue.

The journey from idea to successfully selling Profitable Insider project for $5000 after just 100 hours of work. This post shares details about choosing ideas, building products with no-code tools, pricing MVPs, and the sales process - valuable experience for anyone wanting to develop side projects.

Detailed walkthrough of validating a startup idea using no-code tools, from building an MVP to achieving $567 in revenue within 3 weeks, helping readers understand market approach and product building.

Sharing real experience on validating app ideas manually before investing time and effort into programming. I advise doing 'things that don't scale' - collecting data manually, using no-code platforms to validate market demand first, and only developing full apps when you have paying users.

This article introduces GPT-3, OpenAI's advanced language model, and its revolutionary potential. I analyze GPT-3's diverse capabilities like writing poetry, making music, programming, and designing, while comparing its influence to blockchain technology in shaping the future.

Sharing a case study on validating a dating app idea for the sapiosexual community with minimal cost, from market research to MVP building and feedback collection.

Discovering the journey of investing in Blockstack from a personal perspective, from participating in the App Mining program to analyzing the technology and potential of the project. This post shares real experiences building DApps and deep insights about this blockchain platform.

Summary of the NoCode MVP project with ProgressKer app built entirely on Bubble, sharing experiences and lessons learned after 120 hours of work.

An explanation of the Product Manager role, their work at the intersection of Business, UX, and Technology, along with different types of PMs in the tech industry.

A detailed introduction to Bubble.io, a powerful visual programming tool that allows building complete web apps without writing code.

Analysis of technology development history and why NoCode is an effective solution for building MVPs quickly and cost-effectively.

Introduction to the NoCode MVP challenge, plans and goals for building an MVP product without code after experience from the previous challenge.

The journey of migrating my blog from Hugo to Gridsome and significant performance improvements. This post analyzes reasons for the change, Gridsome advantages like the Vue.js ecosystem, integrated GraphQL, and high customizability. Includes before/after Lighthouse score comparison and real experience working with modern static site generators.

Day 26 of the profitable MVP challenge where I introduce a new idea - an app to automatically open and arrange applications on Mac screen. The idea came from personal need when constantly opening multiple apps together for different tasks. Also sharing new knowledge about using Apple Scripts for automation.

Day 20 of the profitable MVP challenge, sharing about building the landing page for ReadingPointer.com using Hugo and Netlify. The post also describes plans for creating a promo video and detailed instructions on how to easily convert a Chrome extension to a Firefox add-on using tools like Get CRX and extensiontest.com.

Day 14 of the profitable MVP challenge, sharing about completing the Speed Reading extension mockup and analyzing the choice between coding yourself and outsourcing. The post offers advice for both programmers and non-programmers, analyzes time and money costs, and shares the decision to post a freelancer job on Upwork.

Day 13 of the profitable MVP challenge, sharing the development of a Speed Reading Chrome extension. The post analyzes different speed reading methods like RSVP and Tim Ferriss's method, explains the main features including Reader Mode and Reading Pointer, and shares the process of learning and creating a simple Chrome extension.

Day eight of the Profitable MVP in 30 Days challenge, analyzing distribution and payment channels for apps like AppStore, Gumroad, Paddle, and Stripe, along with calculating how many products need to be sold to reach the revenue goal.

Day six of the Profitable MVP in 30 Days challenge, analyzing four software monetization models: advertising, donation, subscription, and one-time payment, to choose the most suitable option for the music player app.

Day three of the Profitable MVP in 30 Days challenge, focusing on defining core features and designing mockups for the Youtube Playlist Player Mac Menu Bar app.

Day two of the Profitable MVP in 30 Days challenge, focusing on analyzing and finalizing the idea between Speed Reading Extension, Pomodoro Timer, and Youtube Playlist MacApp.

A detailed review of Adalo - a no-code platform that helps you create mobile apps for iOS, Android, and Web without writing a single line of code. Learn about UI/UX design features, data management, and API integration capabilities to build MVPs quickly!

A detailed review of the 'Software Product Management' Specialization by University of Alberta on Coursera, covering 6 courses about software product management from basics to advanced topics.

An introduction to User Stories for describing software features in a way that non-technical clients can understand. This method uses the template 'As a, I want to, So that' to identify users, actions, and benefits, with guidance on breaking down User Stories and real examples.

Discover 4 types of MVP from No-product to Functional, and how to choose the most suitable strategy to validate your idea without wasting precious time and resources!

The journey of developing EmboldenIT - a blockchain app for storing and sharing highlights from web content. This post shares the process from idea to implementation, technical challenges building a DApp on Blockstack platform, and designing user experience with a Chrome extension to optimize saving important content.

The journey from idea to successfully launching a SaaS product with a budget under $40k. This post analyzes crucial steps from market research, wireframe design, writing user stories to finding and managing an outsource team. Especially useful for founders without technical background wanting to build quality software at reasonable cost.

A guide on using the Sharetribe platform to build a used book marketplace app without writing code.

A guide on using GlideApps to create mobile apps from Google Spreadsheet without programming, suitable for MVP development.

A detailed guide on converting a blog from WordPress to a static website to optimize performance and focus on writing content, helping bloggers save time and money, from choosing the platform to deployment and efficient blog maintenance.

A detailed step-by-step guide on deploying ASP.NET Core applications to Google Cloud using Virtual Machines. Covers configuring Windows Server, IIS, SQL Server, remote database connection, and custom domain setup - suitable for beginners.

Introduction to Villand - a resort property management application helping investors and managers easily track and manage their assets.

Analyzing pros and cons between learning to code yourself and outsourcing when building an MVP for founders without technical backgrounds.

Exploring solutions to protect online course content from piracy. This post analyzes technical methods in detail like video streaming and watermarks, and especially the approach of creating superior value so learners are willing to pay instead of finding pirated versions.

Discover 6 golden tips to help businesses and startups find, evaluate, and work effectively with freelance developers - from someone who's been on both sides of the negotiation table!

Discover how to design disability-friendly websites in this first part of the web accessibility series. This post introduces WCAG (Web Content Accessibility Guidelines), accessible design principles, and the importance of ensuring web content is accessible to all users.

Explaining and distinguishing four important terms in UI/UX design and software development: Sketch (quick idea drafting on paper or whiteboard), Wireframe (basic skeleton describing app flow), Mockup (adding design elements like colors and fonts to wireframe), and Prototype (interactive sample). With specific examples and appropriate tools for each design stage.

A step-by-step guide to deploying ASP.NET Core applications to Azure, especially for macOS users with CI/CD through GitHub - no Visual Studio or Windows needed!

Analyzing Udemy's disadvantages and the requirements needed to build an independent online learning platform.

Discover 7 attractive IT careers that don't require programming skills - from Tester and BA to Product Manager, all offering great career growth and income for tech enthusiasts who don't enjoy coding!

An interview sharing the experience of transitioning from Quality Control (QC) to Business Analyst (BA) with Hoang Phan. Content includes essential BA skills, differences between the two positions, how QC skills support BA work, and career development roadmap. The article provides a realistic perspective on career transitions in the IT industry.

Real experience of a QA transitioning to interview for a Business Analyst position, along with lessons and advice for beginners.

An analysis of chatbot limitations today and solutions for building smarter chatbots, integrating well with business systems and delivering better user experiences.

Analyzing the personalization trend in online learning and its potential to solve current problems like high dropout rates. This post shares real experiences from both teacher and student perspectives, proposing solutions to improve learning effectiveness through personalization technology.

Analyzing how to design effective product review features for e-commerce websites to increase trust and conversion rates.

My experience at Vietnam Web Summit 2018, exploring company booths like StayNow and a Social blockchain platform, plus thoughts on the presentation content. I comment on the short 25-30 minute format for each topic and share personal views on web technology trends presented at the event.

This article presents the MVP of our blockchain-based electronic invoice solution in detail, including the workflow, two main applications (Admin App and Client App), implementation approach, and an actual demo with screenshots. This solution helps companies manage invoices more efficiently and transparently using blockchain technology.

Analyzing trends and challenges for marketplace startups, from a technology and business model perspective, helping readers understand the potential and risks of this model.

A detailed analysis of essential features when building a real estate classifieds website, based on studying top platforms like batdongsan.com.vn, Chotot, Zillow and Rever. Evaluating key features like homepage, listing page, detail page, search filters, and other additional features to give readers a comprehensive view when developing real estate websites.

Real interview experience for QC positions at various companies, including the process, questions asked, and advice for candidates looking to break into Quality Control.

This article analyzes the current situation and proposes a blockchain solution for the electronic invoice system in Vietnam. I present details about legal regulations, current implementation models, limitations of traditional systems, and propose a comprehensive solution using blockchain technology to address the issues.

This article explores advanced features of the JavaScript Console beyond simple console.log. The author introduces useful methods like console.table for displaying data in table format, and ways to format and organize logs for more effective debugging during web development.

Discover how PWA is revolutionizing the web experience with offline capability, super-fast speed, and native app-like experience. The future of web is here!

Reviewing the Vietnam Mobile Day 2018 event, sharing about discussion topics, speakers, and lessons learned from this major tech conference.

A detailed review of the Game UIT Hackathon 2018 with the anti-violence theme. I share my experience participating as a mentor, analyze standout project ideas, and give observations about the event organization.

Explaining the differences between AI, Machine Learning, and Deep Learning at a basic level, helping readers understand the relationship and scope of each concept.

An introduction to no-code tools that help non-programmers build effective MVPs (Minimum Viable Products). I share real experience with platforms like Bubble.is for web apps, Shopify for e-commerce, and Configure.IT and Dropsource for mobile app development. A cost-effective solution for startups wanting to validate product ideas before making big investments.

An analysis of using Shopify for e-commerce websites in the Vietnamese market. Comparing e-commerce development options like hosted solutions (Shopify, Haravan), open-source platforms (Magento, OpenCart), and custom development. A detailed evaluation of Shopify's strengths and weaknesses to help readers decide if this platform suits their business needs.

This post shares 9 compelling reasons to invest in a Kindle e-reader, from E-Ink technology that's easy on the eyes, amazing battery life, to effective English learning with built-in dictionary. I analyze in detail the superior advantages like convenience, excellent reading experience, and cost-effectiveness compared to physical books, giving readers a comprehensive view before deciding to buy this device.

Sharing experiences and lessons from famous developers about blogging and knowledge sharing, helping readers understand how to build personal brands and develop skills in the tech industry through writing.

This article explains how to use the guard statement in Swift, an alternative approach to if let for Optional Binding. I present the syntax, practical examples, and benefits of guard in making code cleaner and more readable when handling input conditions.

A detailed explanation of the Optional type in Swift, from why Optional exists, to using techniques like Forced Unwrapping, Optional Binding, Implicitly Unwrapped Optionals, Nil coalescing and Optional Chaining, with concrete code examples to help iOS developers understand and apply them correctly.

Statistics from 50 companies hiring iOS developers on ITViec.com, showing the most required skills like Swift, Objective-C, iOS SDK knowledge, app development experience, and additional skills like English and React Native. A useful reference for iOS beginners wanting to know what skills to prepare for job market demands.

Detailed guide on choosing the right Mac to learn iOS programming, from premium options to budget solutions for beginners. This post answers the common question 'Can I learn iOS without a Mac?' and offers practical suggestions on specs and models suitable for every budget so you can start your iOS development journey.

Sharing my perspective on Bitcoin and blockchain, based on books by Andreas M. Antonopoulos. I suggest that instead of just investing in cryptocurrency, those without much capital can learn blockchain programming to get into this field, as it's technology with the potential to change financial systems and governments in the future.

Discover 7 effective methods to always stay updated with the latest technology trends. From following experts on Twitter and GitHub to joining conferences and programming communities, this post provides practical guidance to help developers not fall behind in the fast-paced technology era.

Discover 5 breakthrough technology trends shaping the future of mobile apps: from PWA that doesn't need installation to AR/VR, AI, IoT, and blockchain - technologies changing how we interact with devices!

A clear explanation of four fundamental relationships in object-oriented programming - Association, Aggregation, Composition, and Dependency with concrete Swift examples. Understanding these concepts will help you design software more professionally!

A realistic perspective on tech startups from someone in the industry, analyzing misconceptions about startup ideas and the importance of validating ideas before building products. Advice and useful resources for those wanting to start tech businesses but lacking experience in the field.

Sharing my experience switching from StableHost to HawkHost, improving page load time from 3 minutes to 6-8 seconds. A detailed guide on migrating WordPress to a different shared host, optimizing your website, adding SSL certificates, and tips for using discount codes effectively.

An introduction to Flutter - Google's cross-platform mobile development SDK using the Dart language. The author analyzes standout features like hot reload, reactive programming, the widget system, and native feature access, while comparing with React Native to give developers an overview of this new technology.

Sharing areas worth investing in for programmers beyond algorithm skills, including economics/business knowledge, self-marketing, T-shaped technology skills, reading/writing abilities, health, and personal relationships for well-rounded development.

An article explaining the Insertion Sort algorithm implemented in Swift in an easy-to-understand, memorable way - not like textbooks.

An analysis of the differences between struct and class in Swift, explaining Reference Types and Value Types with concrete examples. This is the first part in a series guiding Swift developers on choosing between struct and class for different use cases.

Sharing about personal experience dealing with feelings of boredom and loss of motivation after completing a big project. I introduce an inspiring story about a fashion model who became a software engineer in one year, and how writing can help regain focus.

Sharing my experience participating in Apkathon 2017, a small-scale hackathon with a cozy atmosphere, along with lessons learned after 4 times joining programming marathon competitions.

This article introduces Promise - an important concept in ES6 widely used in modern JavaScript frameworks and libraries. I share a series of 11 videos explaining Promise in detail, from basic to advanced, helping learners master asynchronous handling in JavaScript.

An explanation of why webpack is essential in modern web application development. The author compares server rendering and client rendering (SPA), analyzes how each model works, and explains why webpack helps solve complex problems when developing client-side JavaScript applications like module management, resource optimization, and supporting new JavaScript features.

An introduction to deeplearning.ai - Professor Andrew Ng's latest project with a breakthrough Deep Learning course following the success of his Machine Learning course with nearly 2 million students. A great opportunity to catch up with the technology shaping the future!

Detailed explanation of using Spread Operator (...) to split strings, concatenate arrays, and Rest Operator to handle parameters in JavaScript with practical and visual examples.

A comprehensive look at iteration methods in JavaScript from basic to advanced: traditional for, forEach, map, filter, and more. This post clearly explains each syntax with practical examples to help developers optimize their code.

Discover 7 practical methods to help IT students earn money while still in school - from freelancing on Upwork to MMO, teaching, and affiliate marketing, all shared from real experience!

Sharing React learning experiences from an iOS developer's perspective, introducing resources like create-react-app, official documentation, and online courses. The author also reviews React courses on Udemy and other platforms to help beginners find an effective learning path.

Compilation and review of the best Vietnamese programming learning platforms today. This post introduces Techmaster, CodersX, Viblo and many other sources in detail, helping learners easily access programming knowledge in their native language.

How to start a successful tech startup without coding skills through the concept of Minimum Viable Business (MVB). Instead of rushing to build a tech product, the author advises creating simple manual solutions to validate ideas and attract customers first.

This article introduces the MERN Stack - a modern web development technology stack consisting of MongoDB, ExpressJS, React, and NodeJS. I explain the concept of technical stack and analyze each component of MERN in detail, helping readers understand how these JavaScript technologies combine to build comprehensive web applications.

Sharing the challenges and solutions when you've learned to code but don't know what to build next, helping readers find direction for their learning journey and skill development.

An analysis of ReactXP - Microsoft's cross-platform framework based on React/React Native, comparing it with Xamarin and explaining Microsoft's strategy of developing both technologies in parallel in the cross-platform app development market.

An article describing how Techtalk.vn used copy-paste methods to take content from Vietnamese tech bloggers to drive traffic to their site.

An introduction to deploying React Native apps using Expo without needing Android Studio or Xcode. I share convenient Expo features like automatic certificate generation, easy app building, and especially Over the Air (OTA) updates without submitting new versions to the store.

This article introduces the Advanced JavaScript course, explaining why JavaScript is worth learning with its wide applications from web and mobile to IoT. I analyze the difficulties when learning JavaScript and the effective approach, focusing on understanding the language's essence rather than learning multiple frameworks or related technologies simultaneously.

Easy-to-understand explanation about NodeJS in Q&A format, helping beginners familiarize with concepts like JavaScript engine, event-driven, non-blocking I/O and package ecosystem.

This post explains the three core principles of Redux and how it solves the state management problem in complex React/React Native applications.

Understanding the differences between var, let and const in JavaScript ES6, how block scope works, and the rules for using each declaration

Learn about Scope Chain in JavaScript, how Outer Environment works and how variables are searched across Execution Contexts

This post introduces some useful tools for React Native development including Visual Studio Code, Expo, and React Native Debugger.

Sharing the importance of reading official documentation when learning new technologies instead of just relying on video tutorials. I analyze the habit of being lazy about reading docs, the difference between good and bad documentation, the common 'give me resources' phenomenon in the programming community, and encourage reading original docs to deeply understand technology.

Learn about Execution Stack in JavaScript, how Execution Context and Variable Environment work

This article explains the hoisting phenomenon in JavaScript - how JavaScript handles variable and function declarations during code execution. I analyze in detail the Creation Phase and Execution Phase stages, while providing illustrative examples to help readers understand how JavaScript moves declarations to the top of the scope before execution.

This article explains the Global Execution Context in JavaScript, how it creates the Global Object and the this variable. I demonstrate how to run JavaScript code in a browser, analyze how the Global Object is created as window in the browser environment, and the differences when running in other environments like NodeJS.

This article explains two foundational concepts in JavaScript: Name-Value Pair and Object. I present definitions, how they work, and the importance of these concepts in understanding JavaScript data structures, while providing visual examples for easy comprehension.

This article explains foundational concepts in JavaScript like Syntax Parser, Execution Context, and Lexical Environment. I analyze the importance of understanding these terms to master how JavaScript works, while providing examples illustrating how browsers process source code.

Sharing my personal experience changing from dismissing React Native and JavaScript to actually understanding and appreciating them. I analyze tech bias, its harm in the programming community, and encourage developers to be open-minded when approaching new technologies.

A detailed guide on using Firebase Cloud Functions to automatically send notifications when data in Firebase Realtime Database changes. The article walks through each step of configuring FCM, getting device tokens, writing cloud functions, and deploying a complete notification system for iOS apps - helping developers build backends without managing servers.

My experience at Vietnam Mobile Day 2017, from check-in to exploring booths like TopDev, Matbao, Giaohangnhanh, GearInc and Appota, to attending tech presentations about mobile. I was particularly impressed by Giaohangnhanh's Ahamove app and share my thoughts on the session content.

Analyzing the future of Kotlin after Google officially announced support for it as an Android programming language, examining its cross-platform capabilities and advantages over Java.

Sharing my experience developing Elite Condos - a platform connecting apartment owners with home service providers. I distill lessons about finding practical ideas, the importance of software architecture, code comments, refactoring, and focusing on one platform to ship the product.

Learn about memory management in Swift, the difference between Stack and Heap, Value Types and Reference Types

Discover 5 golden tips to overcome the initial barriers when learning programming - from continuous practice to teaching others, all proven strategies!

Detailed explanation of Protocols in Swift 3, from basic concepts to implementation and why Swift is called a Protocol Oriented Programming language.

This article, excerpted from the book 'Programming for Everyone with Swift,' introduces the basic technical knowledge needed to develop software. I present the importance of programming languages, IDE, libraries, frameworks, and platforms in the process of learning and building software.

A clear explanation of the Information Technology (IT) field, breaking common misconceptions and providing an overview of main areas in IT like web development (static and dynamic web), mobile apps, artificial intelligence, and other technologies. This is an excerpt from the book 'Programming for Everyone with Swift' helping readers understand the true nature of IT work.

Sharing about the difficulties of self-learning programming and calling on the community to write quality Vietnamese programming books suitable for beginners.

Sharing the Swift and iOS learning roadmap from basic to advanced based on my actual experience. Content includes quality learning resources like books, online courses from Devslopes, Ray Wenderlich and Apple, along with advice on effective approaches for beginners.

8 strategic activities to help developers stand out in the industry - from GitHub projects with thousands of stars to publishing books and creating online courses. These steps not only improve skills but also open up countless dream career opportunities!

Evaluating the Ionic framework for cross-platform mobile development, analyzing advantages like open source, easy documentation, complete components, and rich ecosystem. Comparing Ionic with React Native and sharing real experience using this framework.

Reflections on the constant change of technology and society, and the importance of continuous learning and adaptation to avoid being left behind.

Introducing the prevalence and versatility of JavaScript in modern technology. From frontend web development, backend with Node.js, mobile apps with React Native, desktop with Electron, to IoT. I share about JavaScript's flexibility and why it's become the most widely used programming language today.

A detailed walkthrough of learning and exploring React Native, from setting up the environment to building real applications, helping readers understand how to approach and develop mobile apps with this framework.

Sharing real experiences of freelancing on Upwork, from getting projects to completion and valuable lessons learned.

This article reviews two Java specialization programs on Coursera from Duke University and the University of California, San Diego. I compare the content, approach, and benefits of each course, while also sharing my experience with applying for financial aid on the platform.

An analysis of a subtle bug in Binary Search related to calculating the midpoint. I explain the cause of integer overflow when adding lowerBound and upperBound, how to fix it with midPoint = lowerBound + (upperBound - lowerBound) / 2, and share the history of this bug in Programming Pearls.

Explaining the concept of Big O in programming through hilarious and easy-to-understand examples from love stories to transferring movies. This post helps you master algorithm complexity with a fun approach, from O(1), O(log n), O(n) to O(n^2) without needing advanced math.

An analysis of why a college degree is still very important in IT, from providing a solid foundation of knowledge, networking and internship opportunities, to facilitating job searches, further education, and long-term career development in the tech industry.

A step-by-step programming learning roadmap for beginners, from learning English, basic programming, OOP, data structures and algorithms, to GUI programming and databases. I share personal experience and practical advice for those feeling confused about choosing a direction in IT.

Detailed explanation of property observers in Swift, how to use willSet and didSet to observe property changes, with illustrative examples and reasons to apply them in iOS development.

Detailed analysis of Swift's future, comparing syntax with Objective-C and exploring potential application areas, helping readers understand Swift's development potential in the Apple ecosystem and other platforms.

Sharing my experience at Google Developer Group's Mobile Hackathon, lessons from an unsuccessful competition, the process of developing an exam practice app with Firebase, and observations about technology trends like AI, chatbots, and AR from a developer's perspective.

Basic iOS programming tutorial through building a Son Tung MTP music playlist app with Swift 3 and Xcode 8. Covers techniques like Autolayout, TableView, Data modeling, MVC pattern, and using segues, suitable for those with basic Swift and Xcode knowledge.

Evaluating the Udemy online learning platform, focusing on practical and project-based programming courses. Analyzing Udemy's advantages over Coursera and Pluralsight, especially providing hands-on knowledge, latest technologies, and ability to create complete products from the start, suitable for beginners.

A detailed guide on Completion Handlers in Swift 3 for iOS development. I explain when to use them, how to declare functions with Completion Handlers, and two methods for calling them: creating separate functions and trailing closures. Includes practical examples with JSON loading.

This post analyzes the two biggest challenges when learning to code: doubting whether you chose the right major and struggling to grasp new concepts like functions, pointers, and algorithms. I share practical solutions from my 2 years of learning experience to help beginners overcome these early hurdles and develop effective programming skills.

Introducing the Top-bottom-up approach for effective programming learning, combining big-picture thinking with diving into details, suitable for beginners.

A detailed guide on methods to find native speakers for online English speaking practice. The post introduces three main approaches: joining learning groups on Paltalk, using the language exchange site italki.com, and hiring native teachers. The author shares personal experiences, tips for choosing the right teacher, and interesting topics for conversations with native speakers.

A detailed review of the Pluralsight online learning platform, focusing on .NET courses, user interface, and value for money compared to the knowledge gained.

A tutorial on developing a duck shooting game with Unity3D version 5.3, part of my project-based Unity3D tutorial series. I'll introduce how to use Unity's physics system, create game objects, and program gameplay similar to airplane shooter games.

Detailed review of Coursera - an online learning platform partnered with the world's top universities, providing high-quality courses across many fields from basic to advanced programming.

This article discusses the challenge of choosing which technology to learn in IT with its diversity and rapid changes. I share my personal experience of falling into the 'Search Maze' when looking for direction, and offer advice on effective approaches to professional development.

A detailed explanation of the difference between two input handling functions in Unity3D: Input.GetAxis and Input.GetAxisRaw, helping readers understand proper usage for different game types.

Real experience learning the Algorithm Specialization on Coursera - from greedy algorithms to dynamic programming. This post shares details about course structure, teaching quality, exercise system, and how to apply for financial aid to learn for free. An ideal choice for those wanting to learn algorithms systematically from top instructors.

A detailed explanation of cloud computing service models IaaS, PaaS, SaaS and BaaS, with concrete examples for each type. Helping readers understand the differences between these models and choose the right one when developing web applications.

Sharing my experience participating in the Smart City Hackathon Binh Duong 2016 - from scrambling to form a team to pulling all-nighters developing an app. I recount the event timeline, challenges working with new technology, and offer 6 valuable lessons for anyone wanting to join hackathons, emphasizing preparation, presentation skills, and the IoT trend.

Real experience and valuable lessons from creating an online programming course on Udemy, from preparing content to recording videos and interacting with students.

The opening post in a clean code series, focusing on the art of naming variables, functions, and parameters. I analyze common mistakes like cryptic names, outdated data type prefixes, overly long names, and mixed language naming. Plus, a quick guide on using Visual Studio's Refactor feature to rename things efficiently.

My journey and valuable lessons after one year of learning to code, from initial struggles to building real applications and shaping my career path.

Explaining the differences between three point representations in Unity3D: ScreenPoint (pixel-based frame representation), ViewPoint (frame always has height and width of 1), and WorldPoint (coordinates shown through Transform.Position). The purpose of having these three representations is to help developers create flexible cross-platform games across different screen sizes.

A guide on how to fix the 'Can't add script' error in Unity when the class name doesn't match the script file name, helping game developers easily solve this common issue.

A detailed explanation of how to use the [System.Serializable] attribute in Unity to display classes and properties in the Inspector, helping developers easily customize values and manage data in games.

Understanding Time.delta in Unity and how to use Time.deltaTime to create smooth movement in games

Analysis of pros and cons of learning programming at training centers, based on real experience. Comparing differences between university knowledge and training centers, from practical content to investment costs.

Detailed analysis of two mobile app development approaches: native code and cross-platform. This post compares pros and cons of each method, from native code's performance and user experience to cross-platform's flexibility and time savings with Xamarin, PhoneGap, and Ionic. Useful for developers deciding which platform suits their project and resources.

Basic guide on declaring and using variables in Unity to display and adjust values through the Inspector. This post clearly explains the benefits during game development, helping you test and adjust parameters without modifying code.

This article provides basic guidance on how to create and use scripts in Unity. I explain the role of scripts as the 'brain' controlling other components, how to create new scripts, and important functions like Start() and Update() with practical examples on controlling objects in games.

A guide on how to create a story reading app on Windows Phone 8.1 using Microsoft's AppStudio tool and how to publish it to the Windows Store.

A guide to upgrading the number guessing game from console to graphical interface with Unity UI. The article presents steps for creating a project, saving scenes, adding UI Text, and customizing Buttons - helping learners get familiar with user interface components in Unity.

A detailed guide on creating a simple number guessing game in Unity 5, suitable for programming beginners. The article introduces the Unity interface and how to print information to the console, helping learners grasp basic concepts in game development.

Explaining the difference between Awake() and Start() functions in Unity Scripts, helping Unity beginners understand how to use default functions in this game engine.