Compare and contrast `apply` and `let` scope functions
Tests Kotlin scope function knowledge: context (`this`/`it`) & return value. `apply` uses `this`, returns the object (for config). `let` uses `it`, returns lambda result (for null-checks/transforms). Red flag: mixing up return values or use cases.
This tests your precise knowledge of Kotlin's scope functions, focusing on the key distinctions between `apply` and `let`: their context object (`this` vs. `it`) and what they return (the object itself vs. the lambda's result). A strong answer defines `apply` for object configuration (returns `this`) and `let` for null-safe operations or transformations (returns lambda result). A common red flag is confusing the return values, which breaks chaining, or failing to articulate the primary use case for each function.
Read the original → kotlinlang.org
- #kotlin
- #android
- #scope functions
- #api design
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