🔄 Kotlin Migration

A practical guide for developers transitioning codebases to Kotlin, navigating interoperability, idiomatic patterns, and the real-world challenges of modernizing legacy systems.

Java to Kotlin

by Duncan McGregor • 2021

Migrating Java to Kotlin safely: functional refactoring that keeps production running.

4.58

☕ Java Developers 🧠 Functional Programming 🛡️ Null Safety

Java to Kotlin 91%

Migrating Java to Kotlin safely: functional refactoring that keeps production running.

by Duncan McGregor 2021

4.58

33 ratings

☕ Java Developers 🧠 Functional Programming 🛡️ Null Safety

Kotlin in Action

by Dmitry Jemerov • 2016

Write less code, eliminate null errors, and keep every Java library. A Kotlin guide for developers.

4.41

603

🇰 Kotlin ☕ Java 🔬 Functional Programming

Kotlin in Action 90%

Write less code, eliminate null errors, and keep every Java library. A Kotlin guide for developers.

by Dmitry Jemerov 2016

4.41

603 ratings

🇰 Kotlin ☕ Java 🔬 Functional Programming

Kotlin for Android Developers

by Antonio Leiva • 2016

Build an Android app while learning Kotlin: less boilerplate, null safety, and concise code.

3.85

183

📱 Android Development 🔷 Kotlin 📚 Project-Based Learning

Kotlin for Android Developers 89%

Build an Android app while learning Kotlin: less boilerplate, null safety, and concise code.

by Antonio Leiva 2016

3.85

183 ratings

📱 Android Development 🔷 Kotlin 📚 Project-Based Learning

Learning Android

by Marko Gargenta • 2011

Android apps are built from four core components and a threading rule preventing sluggish UIs.

3.68

213

🤖 Android Programming 🏛️ App Architecture 📱 Mobile Ui Design

Learning Android 86%

Android apps are built from four core components and a threading rule preventing sluggish UIs.

by Marko Gargenta 2011

3.68

213 ratings

🤖 Android Programming 🏛️ App Architecture 📱 Mobile Ui Design

Java 8 in Action

by Raoul-Gabriel Urma • 2014

Replace anonymous inner classes with lambdas, iterate with streams, and fix broken dates.

4.35

710

☕ Java Programming 🧠 Functional Programming 📈 Language Evolution

Java 8 in Action 85%

Replace anonymous inner classes with lambdas, iterate with streams, and fix broken dates.

by Raoul-Gabriel Urma 2014

4.35

710 ratings

☕ Java Programming 🧠 Functional Programming 📈 Language Evolution

Working Effectively with Legacy Code

by Michael C. Feathers • 2004

Every change is surgery in the dark. The proven, repeatable path to taming an untested codebase.

4.14

5k+

🧓 Legacy Code 🔧 Software Maintenance 🧪 Unit Testing

Working Effectively with Legacy Code Summary

Working Effectively with Legacy Code 85%

Every change is surgery in the dark. The proven, repeatable path to taming an untested codebase.

by Michael C. Feathers 2004

4.14

5k+ ratings

🧓 Legacy Code 🔧 Software Maintenance 🧪 Unit Testing

More Joel on Software

by Joel Spolsky • 2008

Ship on schedule, hire developers who skip the job boards, and know when fixing beats rewriting.

4.05

549

🖥️ Software Development 👔 Engineering Management 🤝 Developer Culture

More Joel on Software 85%

Ship on schedule, hire developers who skip the job boards, and know when fixing beats rewriting.

by Joel Spolsky 2008

4.05

549 ratings

🖥️ Software Development 👔 Engineering Management 🤝 Developer Culture

Design Thinking Research

by Larry Leifer • 2013

What if your programming environment saved every change, so you could explore ideas without risk?

4.00

💻 Software Design 🗂️ Version Control 🔄 Iterative Development

Design Thinking Research 85%

What if your programming environment saved every change, so you could explore ideas without risk?

by Larry Leifer 2013

4.00

1 ratings

💻 Software Design 🗂️ Version Control 🔄 Iterative Development

Pro Git

by Scott Chacon • 2009

Learn Git from the inside out: snapshots, branching, and the reflog that saves lost work.

4.18

3k+

🗂️ Version Control 💻 Command Line Tools 🤝 Code Collaboration

Pro Git 85%

Learn Git from the inside out: snapshots, branching, and the reflog that saves lost work.

by Scott Chacon 2009

4.18

3k+ ratings

🗂️ Version Control 💻 Command Line Tools 🤝 Code Collaboration

Refactoring

by Martin Fowler • 1999

How to restructure messy code safely: a catalog of refactorings, each step protected by a test.

4.24

9k+

🔧 Code Refactoring 🏗️ Software Design 💸 Technical Debt

Refactoring 85%

How to restructure messy code safely: a catalog of refactorings, each step protected by a test.

by Martin Fowler 1999

4.24

9k+ ratings

🔧 Code Refactoring 🏗️ Software Design 💸 Technical Debt

Understanding Software

by Max Kanat-Alexander • 2017

Code that's easy to write is hard to maintain. Here's how to flip that equation.

3.58

179

🛠️ Software Craftsmanship 🧹 Code Quality 🔍 Debugging Methods

Understanding Software 85%

Code that's easy to write is hard to maintain. Here's how to flip that equation.

by Max Kanat-Alexander 2017

3.58

179 ratings

🛠️ Software Craftsmanship 🧹 Code Quality 🔍 Debugging Methods

The Swift Programming Language

by Apple Inc. • 2014

How Swift makes your code safer, cleaner, and faster: the official language reference.

4.15

479

🖥️ Apple Development 📖 Language Reference 🔒 Type Safety

The Swift Programming Language 85%

How Swift makes your code safer, cleaner, and faster: the official language reference.

by Apple Inc. 2014

4.15

479 ratings

🖥️ Apple Development 📖 Language Reference 🔒 Type Safety

Learning Go

by Jon Bodner • 2021

Go's power is what it omits. Learn the idioms that keep code readable for decades.

4.42

493

📐 Idiomatic Coding 🔀 Concurrency Patterns 🏷️ Static Typing

Learning Go 85%

Go's power is what it omits. Learn the idioms that keep code readable for decades.

by Jon Bodner 2021

4.42

493 ratings

📐 Idiomatic Coding 🔀 Concurrency Patterns 🏷️ Static Typing

Functional Programming for Java Developers

by Dean Wampler • 2011

Immutability kills whole categories of concurrency bugs. The functional tools Java developers need.

3.27

126

🧑‍💻 Functional Programming ⚡ Concurrent Programming ☕ Java Development

Functional Programming for Java Developers Summary

Functional Programming for Java Developers 85%

Immutability kills whole categories of concurrency bugs. The functional tools Java developers need.

by Dean Wampler 2011

3.27

126 ratings

🧑‍💻 Functional Programming ⚡ Concurrent Programming ☕ Java Development

Five Lines of Code

by Christian Clausen • 2021

Trust rules, not taste. Inflexible constraints that hold every method to a five-line standard.

3.99

🛠️ Code Refactoring 🔷 Object-Oriented Design ✅ Code Quality

Five Lines of Code 85%

Trust rules, not taste. Inflexible constraints that hold every method to a five-line standard.

by Christian Clausen 2021

3.99

84 ratings

🛠️ Code Refactoring 🔷 Object-Oriented Design ✅ Code Quality

Dependency Injection in .NET

by Mark Seemann • 2011

When .NET classes build their own dependencies, the codebase calcifies. Patterns to undo it.

4.42

784

🧱 Object-Oriented Design 🧩 Design Patterns 📐 Solid Principles

Dependency Injection in .NET 85%

When .NET classes build their own dependencies, the codebase calcifies. Patterns to undo it.

by Mark Seemann 2011

4.42

784 ratings

🧱 Object-Oriented Design 🧩 Design Patterns 📐 Solid Principles

The Art of Unit Testing

by Roy Osherove • 2009

C# unit testing without the brittle tests: stubs, mocks, and the isolation patterns that work.

4.09

1k+

🧪 Unit Testing 🖥️ .Net Development 🎭 Mocking Frameworks

The Art of Unit Testing 85%

C# unit testing without the brittle tests: stubs, mocks, and the isolation patterns that work.

by Roy Osherove 2009

4.09

1k+ ratings

🧪 Unit Testing 🖥️ .Net Development 🎭 Mocking Frameworks

Kubernetes in Action

by Marko Luksa • 2017

Why restart containers manually? One declarative system handles deployment, scaling, and recovery.

4.59

681

🐳 Container Orchestration ☁️ Cloud Native ⚙️ Infrastructure As Code

Kubernetes in Action 85%

Why restart containers manually? One declarative system handles deployment, scaling, and recovery.

by Marko Luksa 2017

4.59

681 ratings

🐳 Container Orchestration ☁️ Cloud Native ⚙️ Infrastructure As Code

Geek Sublime

by Vikram Chandra • 2013

Why great code feels elegant: the answer may lie in ancient Indian aesthetics, not algorithms.

3.28

1k+

💻 Code Aesthetics 🌐 Computing Culture 🪷 Indian Aesthetics

Geek Sublime 85%

Why great code feels elegant: the answer may lie in ancient Indian aesthetics, not algorithms.

by Vikram Chandra 2013

3.28

1k+ ratings

💻 Code Aesthetics 🌐 Computing Culture 🪷 Indian Aesthetics

Game Development Patterns and Best Practices

by John P. Doran • 2017

Design patterns that ship games: when to use each and how they prevent late-stage collapse.

3.90

🎮 Game Development 🧩 Design Patterns 🧹 Clean Code

Game Development Patterns and Best Practices Summary

Game Development Patterns and Best Practices 85%

Design patterns that ship games: when to use each and how they prevent late-stage collapse.

by John P. Doran 2017

3.90

20 ratings

🎮 Game Development 🧩 Design Patterns 🧹 Clean Code

Practices of an Agile Developer

by Venkat Subramaniam • 2006

Clever code breaks teams; clear code lasts. Daily disciplines that turn a coder into a pro.

3.88

1k+

🔄 Agile Software Development 🛠️ Software Craftsmanship 📝 Clean Code

Practices of an Agile Developer 85%

Clever code breaks teams; clear code lasts. Daily disciplines that turn a coder into a pro.

by Venkat Subramaniam 2006

3.88

1k+ ratings

🔄 Agile Software Development 🛠️ Software Craftsmanship 📝 Clean Code

The Complete Software Developer's Career Guide

by John Sonmez • 2017

One language, one portfolio, one interview strategy: the sequence that turns learners into hires.

4.02

1k+

💼 Software Careers 🚪 Breaking Into Tech 🎯 Technical Interviews

The Complete Software Developer's Career Guide Summary

The Complete Software Developer's Career Guide 84%

One language, one portfolio, one interview strategy: the sequence that turns learners into hires.

by John Sonmez 2017

4.02

1k+ ratings

💼 Software Careers 🚪 Breaking Into Tech 🎯 Technical Interviews

Two Scoops of Django

by Daniel Roy Greenfeld • 2013

Django gets messy fast. The project structure, query rules, and Unix principle that keep it clean.

4.22

260

💻 Python Web Development 🧩 Django Framework ⚙️ Backend Development

Two Scoops of Django 84%

Django gets messy fast. The project structure, query rules, and Unix principle that keep it clean.

by Daniel Roy Greenfeld 2013

4.22

260 ratings

💻 Python Web Development 🧩 Django Framework ⚙️ Backend Development

14 Habits of Highly Productive Developers

by Zeno Rocha • 2020

Fourteen habits for developers who want to stop sprinting and start compounding.

4.00

723

🖥️ Software Engineering 💼 Software Careers 🧱 Code Craftsmanship

14 Habits of Highly Productive Developers Summary

14 Habits of Highly Productive Developers 84%

Fourteen habits for developers who want to stop sprinting and start compounding.

by Zeno Rocha 2020

4.00

723 ratings

🖥️ Software Engineering 💼 Software Careers 🧱 Code Craftsmanship

Ansible

by Lorin Hochstein • 2014

No agents required. Automate configuration and deployment with playbooks you can actually read.

3.88

270

🔧 Configuration Management 📋 Infrastructure As Code 🛠️ Devops Tooling

Ansible 84%

No agents required. Automate configuration and deployment with playbooks you can actually read.

by Lorin Hochstein 2014

3.88

270 ratings

🔧 Configuration Management 📋 Infrastructure As Code 🛠️ Devops Tooling

Functional Programming in Java

by Venkat Subramaniam • 2013

Cleaner code, less boilerplate, effortless parallelism: the Java 8 lambda and streams playbook.

4.17

226

🧱 Java Development 🔧 Functional Programming ☕ Modern Java

Functional Programming in Java 84%

Cleaner code, less boilerplate, effortless parallelism: the Java 8 lambda and streams playbook.

by Venkat Subramaniam 2013

4.17

226 ratings

🧱 Java Development 🔧 Functional Programming ☕ Modern Java

Tidy First?

by Kent Beck • 2023

Software cost is coupling, and tidying is an investment: when to do it, when to ship.

3.92

1k+

🛠️ Software Design 🔧 Refactoring Techniques ✨ Code Quality

Tidy First? 84%

Software cost is coupling, and tidying is an investment: when to do it, when to ship.

by Kent Beck 2023

3.92

1k+ ratings

🛠️ Software Design 🔧 Refactoring Techniques ✨ Code Quality

Building Microservices

by Sam Newman • 2014

Break the monolith: how to carve out autonomous services that deploy fast and evolve independently.

4.22

5k+

🧩 Microservices 🌐 Distributed Systems 🏗️ Software Architecture

Building Microservices 84%

Break the monolith: how to carve out autonomous services that deploy fast and evolve independently.

by Sam Newman 2014

4.22

5k+ ratings

🧩 Microservices 🌐 Distributed Systems 🏗️ Software Architecture

Continuous delivery

by Jez Humble • 2010

Your releases are a nerve-wracking ordeal. The pipeline that turns them into a routine button-push.

4.20

3k+

🚚 Software Delivery 🔗 Continuous Integration ✅ Automated Testing

Continuous delivery 84%

Your releases are a nerve-wracking ordeal. The pipeline that turns them into a routine button-push.

by Jez Humble 2010

4.20

3k+ ratings

🚚 Software Delivery 🔗 Continuous Integration ✅ Automated Testing

Kubernetes Patterns

by Bilgin Ibryam • 2019

Stop wiring containers by hand. 30+ patterns for cloud-native apps on Kubernetes.

4.31

216

☁️ Cloud Native 🔷 Kubernetes 📦 Container Orchestration

Kubernetes Patterns 84%

Stop wiring containers by hand. 30+ patterns for cloud-native apps on Kubernetes.

by Bilgin Ibryam 2019

4.31

216 ratings

☁️ Cloud Native 🔷 Kubernetes 📦 Container Orchestration

Production-Ready Microservices

by Susan J. Fowler • 2016

Your microservice isn't production-ready by default. Here's the org-wide framework to change that.

3.82

460

🧱 Microservices 🏗️ Software Architecture 🌐 Distributed Systems

Production-Ready Microservices 84%

Your microservice isn't production-ready by default. Here's the org-wide framework to change that.

by Susan J. Fowler 2016

3.82

460 ratings

🧱 Microservices 🏗️ Software Architecture 🌐 Distributed Systems

Leading the Transformation

by Gary Gruver • 2015

HP halved development costs and tripled innovation. It was not the code. It was the leadership.

3.80

418

🖥️ Software Development 🏢 Enterprise Agile 🔄 Devops Practices

Leading the Transformation 84%

HP halved development costs and tripled innovation. It was not the code. It was the leadership.

by Gary Gruver 2015

3.80

418 ratings

🖥️ Software Development 🏢 Enterprise Agile 🔄 Devops Practices

How to Speak Tech

by Vinay Trivedi • 2013

No coding required: the Internet, cloud, databases, and software, translated into business sense.

3.93

204

📖 Tech Literacy 🌐 Web Development ☁️ Cloud Computing

How to Speak Tech 84%

No coding required: the Internet, cloud, databases, and software, translated into business sense.

by Vinay Trivedi 2013

3.93

204 ratings

📖 Tech Literacy 🌐 Web Development ☁️ Cloud Computing

Modern Software Engineering

by David Farley • 2021

Software is not a craft; it's a science. The discipline that turns teams into learning machines.

4.16

1k+

🔬 Scientific Engineering 🔄 Continuous Delivery 🔁 Feedback Loops

Modern Software Engineering 84%

Software is not a craft; it's a science. The discipline that turns teams into learning machines.

by David Farley 2021

4.16

1k+ ratings

🔬 Scientific Engineering 🔄 Continuous Delivery 🔁 Feedback Loops

Game Programming Patterns

by Robert Nystrom • 2011

The programming patterns that make game code resilient to change, and the ones that don't.

4.49

2k+

🎮 Game Programming 🧩 Design Patterns 🏗️ Software Architecture

Game Programming Patterns 84%

The programming patterns that make game code resilient to change, and the ones that don't.

by Robert Nystrom 2011

4.49

2k+ ratings

🎮 Game Programming 🧩 Design Patterns 🏗️ Software Architecture

The Art of Agile Development

by James Shore • 2007

Weekly deployments and single-digit bug counts: the whole XP practice set that gets you there.

3.98

915

⚙️ Extreme Programming 🔄 Agile Development 🏭 Lean Software

The Art of Agile Development 84%

Weekly deployments and single-digit bug counts: the whole XP practice set that gets you there.

by James Shore 2007

3.98

915 ratings

⚙️ Extreme Programming 🔄 Agile Development 🏭 Lean Software

Linux Kernel Development

by Robert Love • 2003

Linux has no threads, only tasks, and a red-black tree keeps the CPU fair.

4.34

877

🖥️ Operating Systems ⚙️ Kernel Internals 💻 Systems Programming

Linux Kernel Development 84%

Linux has no threads, only tasks, and a red-black tree keeps the CPU fair.

by Robert Love 2003

4.34

877 ratings

🖥️ Operating Systems ⚙️ Kernel Internals 💻 Systems Programming

Effective Programming

by Jeff Atwood • 2012

Syntax lands the job. Everything else—teams, users, security—is what actually keeps it.

3.91

931

🧱 Software Craftsmanship 🖥️ User Experience Design 🔒 Security-First Design

Effective Programming 84%

Syntax lands the job. Everything else—teams, users, security—is what actually keeps it.

by Jeff Atwood 2012

3.91

931 ratings

🧱 Software Craftsmanship 🖥️ User Experience Design 🔒 Security-First Design

The Game Maker's Apprentice

by Jacob Habgood • 2006

Build games without writing code: a visual logic system that teaches design as you go.

3.94

148

🎮 Game Development Basics 🕹️ 2D Game Creation 🧩 Drag And Drop Coding

The Game Maker's Apprentice 84%

Build games without writing code: a visual logic system that teaches design as you go.

by Jacob Habgood 2006

3.94

148 ratings

🎮 Game Development Basics 🕹️ 2D Game Creation 🧩 Drag And Drop Coding

Clean Code

by Robert C. Martin • 2007

Reading code dominates a developer's day; these rules keep your colleagues from cursing your name.

4.35

24k+

🛠️ Software Craftsmanship 📖 Code Readability 🔄 Refactoring

Clean Code 84%

Reading code dominates a developer's day; these rules keep your colleagues from cursing your name.

by Robert C. Martin 2007

4.35

24k+ ratings

🛠️ Software Craftsmanship 📖 Code Readability 🔄 Refactoring

Learning React

by Alex Banks • 2017

React without the chaos: a sequenced path from components to hooks to the production toolchain.

4.07

521

🖥️ Web Development 🧱 Component Architecture 🧮 Functional Programming

Learning React 84%

React without the chaos: a sequenced path from components to hooks to the production toolchain.

by Alex Banks 2017

4.07

521 ratings

🖥️ Web Development 🧱 Component Architecture 🧮 Functional Programming

Effective Typescript

by Dan Vanderkam • 2019

62 battle-tested recipes that turn TypeScript from a linter into a safety net.

4.40

500

🔷 Typescript 📐 Type Design 🪪 Type Systems

Effective Typescript 84%

62 battle-tested recipes that turn TypeScript from a linter into a safety net.

by Dan Vanderkam 2019

4.40

500 ratings

🔷 Typescript 📐 Type Design 🪪 Type Systems

Docker

by Karl Matthias • 2015

Production Docker: the patterns for images, networking, and orchestration that prevent 3-AM pages.

3.77

459

📦 Containerization 🔄 Devops Practices ☁️ Cloud Native

Docker 84%

Production Docker: the patterns for images, networking, and orchestration that prevent 3-AM pages.

by Karl Matthias 2015

3.77

459 ratings

📦 Containerization 🔄 Devops Practices ☁️ Cloud Native

The Pragmatic Programmer

by Andy Hunt • 1999

The habits and instincts that turn junior coders into trusted pros: a programmer's survival guide.

4.33

24k+

🧱 Software Craftsmanship 🧹 Code Quality 📚 Continuous Learning

The Pragmatic Programmer 84%

The habits and instincts that turn junior coders into trusted pros: a programmer's survival guide.

by Andy Hunt 1999

4.33

24k+ ratings

🧱 Software Craftsmanship 🧹 Code Quality 📚 Continuous Learning

Lean Software Development

by Mary Poppendieck • 2003

The lean manufacturing toolkit, adapted for software teams: cut waste, ship faster, decide later.

4.19

1k+

🏭 Lean Methodology 🔄 Agile Methods 🚀 Continuous Delivery

Lean Software Development 84%

The lean manufacturing toolkit, adapted for software teams: cut waste, ship faster, decide later.

by Mary Poppendieck 2003

4.19

1k+ ratings

🏭 Lean Methodology 🔄 Agile Methods 🚀 Continuous Delivery

Building Secure and Reliable Systems

by Heather Adkins • 2020

Build systems that survive attacks and accidents. Google's framework for reliable, secure software.

3.89

199

🛡️ Software Security 🔧 Site Reliability 🔄 Devops Practices

Building Secure and Reliable Systems Summary

Building Secure and Reliable Systems 84%

Build systems that survive attacks and accidents. Google's framework for reliable, secure software.

by Heather Adkins 2020

3.89

199 ratings

🛡️ Software Security 🔧 Site Reliability 🔄 Devops Practices

Docker Deep Dive

by Nigel Poulton • 2017

From zero to production: master Docker's engine, images, swarm, and security, all in one book

4.24

829

📦 Containerization 🔧 Devops Tools 🗂️ Container Orchestration

Docker Deep Dive 84%

From zero to production: master Docker's engine, images, swarm, and security, all in one book

by Nigel Poulton 2017

4.24

829 ratings

📦 Containerization 🔧 Devops Tools 🗂️ Container Orchestration

Real-World Functional Programming

by Tomas Petricek • 2009

Adopt functional programming on .NET, alongside C#: patterns for cleaner, lock-free concurrency.

3.92

180

🧑‍💻 Functional Programming 🖥️ .Net Development 📜 Declarative Programming

Real-World Functional Programming Summary

Real-World Functional Programming 84%

Adopt functional programming on .NET, alongside C#: patterns for cleaner, lock-free concurrency.

by Tomas Petricek 2009

3.92

180 ratings

🧑‍💻 Functional Programming 🖥️ .Net Development 📜 Declarative Programming

Operating System Concepts

by Abraham Silberschatz • 1985

There is exactly one program that never stops on your computer; everything else negotiates with it.

3.90

2k+

🖥️ Operating Systems ⚙️ Kernel Design 💻 Virtualization

Operating System Concepts 84%

There is exactly one program that never stops on your computer; everything else negotiates with it.

by Abraham Silberschatz 1985

3.90

2k+ ratings

🖥️ Operating Systems ⚙️ Kernel Design 💻 Virtualization

The DevOps Handbook

by Gene Kim • 2015

Speed and stability without the tradeoff. A practical handbook for unifying your delivery pipeline.

4.29

6k+

🛠️ Devops 📦 Software Delivery 🔄 Continuous Delivery

The DevOps Handbook 84%

Speed and stability without the tradeoff. A practical handbook for unifying your delivery pipeline.

by Gene Kim 2015

4.29

6k+ ratings

🛠️ Devops 📦 Software Delivery 🔄 Continuous Delivery

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