Lightweight functional extensions for nullable handling, suspend-friendly mapping, type-safe casting, null-aware matching, and lift combinators for combining nullable values with concise chaining.
A lightweight Kotlin Multiplatform library providing functional programming extensions and utilities for nullable handling, type casting, flow lifting, and more.
Targets: Android · iOS · JVM
dependencies {
implementation("io.github.ktomek:funKtional:1.2.0")
}
// letCo example
runBlocking {
val length = "Hello".letCo { it.length }
println(length) // 5
}
// orDefault example
val value: String? =
default = value.orDefault { }
println(default)
any: Any =
text: String? = any.asTypeOrNull<String>()
println(text)
sum: ? = lift() { a, b -> a + b }
println(sum)
runBlocking {
val x: Int? = null
val y: Int? = 5
z: ? =
result = x.lift(y, z) { a, b, c -> a + b + c }
.orDefault { }
.letCo { it * }
println(result)
}
branch =
.match(
some = { it.length },
none = { }
)
.let { length -> }
.also { println(it) }
Contributions are welcome! Please open issues or submit pull requests.
This project is licensed under the MIT License - see the LICENSE file for details.
letCo for coroutine-friendly mappingorDefault and orDefaultCo for safe null defaultsonNull and onNullCo for executing side-effects on nullasType, asTypeOrNullmatch, matchCo, matchAction, matchCoActionlift functions for combining up to three nullable valuesSurfaced from shared tags and platforms — no rankings paid for.