Safety

Generics in Dart

Learn how Dart's generic types let you write reusable, type-safe classes and functions that work across many types without sacrificing compile-time checking.

Null Safety in Dart

How Dart's sound null safety distinguishes nullable from non-nullable types, and how operators like ?., ??, ??=, and ! plus the late keyword let you work with…

Option and Null Safety

Learn how Scala's Option[T] replaces null with a compiler-checked container type, covering map/flatMap/getOrElse, for-comprehensions, and safe Java interop.

Null Safety in Kotlin

Kotlin's type system distinguishes nullable from non-nullable types at compile time, eliminating most NullPointerExceptions before code ever runs.

Kotlin Cheat Sheet

Kotlin syntax, null safety, data classes, coroutines, and extension functions for concise, safe JVM development.