Clojure Brain Teasers
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Clojure Brain Teasers
Author: Alex Miller
language: en
Publisher: The Pragmatic Programmers LLC
Release Date: 2025-04-01
Challenge your knowledge of Clojure with 25 short Clojure teasers, sometimes with surprising results! Inspired by years of developer questions and feedback, these teasers are handpicked to clarify common points of confusion. Each code challenge illustrates Clojure's elegant design, explaining how and why it works. Enjoy these simple exercises solo or with friends to find gaps in your knowledge, challenge assumptions, and gain valuable insights. Tackle the most common points of confusion Clojure developers encounter, become more efficient when writing and debugging, and better predict the outcomes of Clojure code. Regardless of your Clojure experience, you're certain to learn something new. You know Clojure, but do you really understand it? You may know the mechanics and idioms, but what about the deeper, implicit concepts driving the design? Discover and explore the real Clojure, testing and supplementing your understanding of why this data-driven functional programming language works the way it does. You'll start with the basic concepts such as numeric types, numeric promotion, and logical truth. But the backbone of Clojure is its focus on immutable data, centered around the Clojure collections. Learn about collection equality, polymorphism on nil, adding and finding elements in different collection types, and sorted collections. Explore Clojure's evaluation model, including the Clojure reader, quoting, evaluation, and macro expansion. Finally, learn about the core library functions like `case`, `concat`, `for`, `partial`, and the details of type hinting, vars, and destructuring. Understand the peculiarities of these functions and how to apply them to your advantage in future programs. Use these new insights to build your own concise, expressive, and flexible code. Don't just use Clojure, master it. What You Need: Java 8 or higher Clojure 1.11 or higher
Python Brain Teasers
Author: Miki Tebeka
language: en
Publisher: The Pragmatic Programmers LLC
Release Date: 2021-08-25
We geeks love puzzles and solving them. The Python programming language is a simple one, but like all other languages it has quirks. This book uses those quirks as teaching opportunities via 30 simple Python programs that challenge your understanding of Python. The teasers will help you avoid mistakes, see gaps in your knowledge, and become better at what you do. Use these teasers to impress your co-workers or just to pass the time in those boring meetings. Teasers are fun! At the beginning of each chapter I'll show you a short Python program and will ask you to guess the output. The possible answers can be: Syntax error Exception Hang Some output (e.g. `[1 2 3]`) Here's how to approach the puzzles. Read through the code. Before moving on to the answer and the explanation, go ahead and guess the output. After guessing the output, run the code and see the output yourself. Finally proceed to read the solution and the explanation. The puzzles are short enough to solve on a coffee break, so carry them with you, have fun, and share them with co-workers. People who make mistakes during the learning process learn better than people who don't. If you use this approach at work when fixing bugs, you'll find you enjoy bug hunting more and become a better developer after each bug you fix. Many of these puzzles are from the author's lessons learned (and others) of shipping bugs to production. He often uses the puzzles as quizzes during conferences and meetups, and they tend to create a buzz of excitement. What You Need: You need to know Python at some level and have experience programming with it. NOTE: The book uses Python version 3.8.2 to run the code; the output _could_ change in future versions. You will need a working Python environment, you can download it from "python.org":https://www.python.org/downloads/. You will probably want a good IDE for python, two of the most popular ones are "Visual Studio Code":https://code.visualstudio.com/ and "PyCharm":https://www.jetbrains.com/pycharm/.
Kotlin Brain Teasers
Level up your Kotlin the fun way! Solve mysteries, dodge traps, and banish bugs. Sharpen your critical thinking to ace interviews and ship rock-solid code. Can you outsmart the Kotlin compiler? Detect, deduce, and diagnose your way to clearer code and expert insights. Escape type-system traps and navigate logic labyrinths. Challenge your skills and quiz your friends with fun Kotlin facts, and power up your code with nuanced mastery of data types, functions, and programming techniques. Stay sharp, know your threats, and reason critically to fix bugs before they happen. Laugh at unexpected outcomes and puzzle over awkward edge cases, then ace your next interview with memorable payoffs that simplify key concepts in Kotlin and computer science. Put the fun in functions and laugh while you learn with programming puzzles that challenge your intuition and sharpen your skills. Guess each simple program's output--if you can--then run the code or turn the page to find out what's not as it seems. Deepen your understanding of key data types and put computer science in context as you make deductions and discoveries that will upgrade your apps. Play around and break things to uncover the deliberate design decisions behind Kotlin's unexpected quirks and reveal the why, not just the what. Take on the type system and smuggle null values past the compiler's defenses. Overload operators and turn math on its head as you crack floating-point conundrums. Think like a computer and predict your program's path when you test the limits of control-flow keywords. Harness the power of iteration and immutability to tame devious data and curate collections with confidence. Unravel ambiguous lambda functions and streamline inscrutable syntax. Dodge destructuring dilemmas, spot sneaky shadowing, and know the dynamic difference between members and extensions. Prepare for interviews, tests, competitions, real-world projects, and more with powered-up problem-solving proficiency, improved coding confidence, and lasting Kotlin lessons. Most of all, have fun! What You Need: Run the code in your head, in your IDE, or in the free online Kotlin Playground. The puzzles were written and tested with Kotlin 2.1.20 on the Java Virtual Machine, but they'll work on any recent version and platform. You don't need any additional dependencies.