Lambdas and Higher-Order Functions

Capturing Variables

Let a lambda use a value from the surrounding scope.

Capturing Variables

CapturingVariables.kt 
fun applyToBase(base: Int, change: (Int) -> Int): Int {
    val updated = change(base)
    return updated
}

fun main() {
    val offset = 
    val result = applyToBase(10) { value ->
        value + offset
    }

    println("offset=$offset")
    println("result=$result")
}

fun applyToBase(base: Int, change: (Int) -> Int): Int {
    val updated = change(base)
    return updated
}

fun main() {
    val offset = 
    val result = applyToBase(10) { value ->
        value + offset
    }

    println("offset=$offset")
    println("result=$result")
}

fun applyToBase(base: Int, change: (Int) -> Int): Int {
    val updated = change(base)
    return updated
}

fun main() {
    val offset = 
    val result = applyToBase(10) { value ->
        value + offset
    }

    println("offset=$offset")
    println("result=$result")
}
capture A lambda can read nearby variables without receiving them as parameters.