🚫 Top 10 Common Mistakes in Kotlin Programming

1. ❓ Ignoring Null Safety

• Treating nullable types as non-null without checks.
• ✅ Use ?., ?:, and !! carefully. Prefer safe calls and smart casting.

2. 🧱 Overusing !! (Not-null Assertion)

• Using !! too much can crash the app with NullPointerException.
• ✅ Use null-safe operators and proper null checks instead.

3. 🔁 Misusing var Instead of val

• Declaring variables as mutable (var) when they should be immutable (val).
• ✅ Prefer val for safer, more predictable code.

4. 📦 Ignoring Scope Functions Properly

• Using apply, let, also, etc., without understanding context.
• ✅ Choose the right scope function for the right purpose.

5. 🧠 Confusing == and ===

• == checks structural equality, === checks reference equality.
• ✅ Know when to use each depending on what you're comparing.

6. 🧹 Forgetting to Handle Exceptions

• Not using try/catch when calling risky operations (e.g., parsing, IO).
• ✅ Always handle exceptions gracefully.

7. 🌀 Misunderstanding Coroutines

• Launching coroutines without a proper scope or dispatcher.
• ✅ Use structured concurrency: lifecycleScope, viewModelScope, etc.

8. 🧪 Not Using Kotlin Standard Library Efficiently

• Reinventing functions already available (e.g., filter, map, groupBy).
• ✅ Explore and master Kotlin’s powerful standard library.

9. ⚙️ Mixing Kotlin and Java Poorly

• Not converting Java-style code to idiomatic Kotlin.
• ✅ Embrace Kotlin syntax, avoid Java habits (e.g., setters/getters, verbose loops).

10. 🛠️ Not Taking Advantage of Type Inference

• Explicitly declaring types unnecessarily.
• ✅ Let the compiler infer types where obvious – cleaner and shorter code.

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