Explain higher-order functions and implement filterAndTransform
Tests whether you can define higher-order functions and use lambdas idiomatically in Kotlin. A strong answer defines HOFs as functions that take or return functions, then implements filterAndTransform with filter and map.
Tests fluency with Kotlin higher-order functions, function types, and lambda syntax. A strong answer defines a higher-order function as one that accepts or returns other functions, writes filterAndTransform by chaining list.filter(predicate).map(transform), and notes that Kotlin functions are first-class values with inferred lambda types. Red flag: using explicit for-loops and mutable lists instead of idiomatic filter/map, or failing to explain why the function is higher-order.
Read the original → kotlinlang.org
- #kotlin
- #higher-order-functions
- #lambdas
- #functional-programming
- #collections
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