Kotlin Multiplatform Academy · Lesson

map, filter & fold in Shared Code

Functional collection operators you can rely on cross-platform.

Transform Without Loops

Kotlin gives collections functional operators that transform data cleanly. They all run identically in shared multiplatform code.

map applies a function to every element and returns a new list of the results, leaving the original untouched.

val nums = listOf(1, 2, 3)
val doubled = nums.map { it * 2 }