flatmap
inline fun <T> T.flatmap(predicate: T.() -> Boolean, falsy: T.() -> T = ::caller, truthy: T.() -> T = ::caller): T
Syntax-sugar for a lambda that folds a receiver type T into something else of the same type.
This should primarily be used when chaining.
val result: String = "Hello"
// Before:
val a = 7
val b = if (a % 2 == 0) a else a * 2
val c = b.toString()
// After:
7.flatmap(predicate = { this % 2 == 0 }) { this * 2 }
.toString()Content copied to clipboard
Parameters
T
The type of the receiver.
predicate
The predicate to evaluate on the receiver.
falsy
The lambda to call if the predicate returns false.
truthy
The lambda to call if the predicate returns true.