Android Programming with Kotlin for Professionals: guide to kotlin programming notes for Professionals step by step by Chahdi Othmane

Author:Chahdi, Othmane [Chahdi, Othmane]
Language: eng
Format: epub
Publisher: UNKNOWN
Published: 2021-07-30T00:00:00+00:00

Chapter 13: Basic Lambdas

Section 13.1: Lambda as parameter to filter function

val allowedUsers = users.filter { it.age > MINIMUM_AGE }

Section 13.2: Lambda for benchmarking a function call

General-purpose stopwatch for timing how long a function takes to run: object Benchmark {

fun realtime( body: () -> Unit ): Duration {

val start = Instant.now ()

try {

body ()

} finally {

val end = Instant.now ()

return Duration.between ( start, end)

}

}

}

Usage: val time = Benchmark.realtime ({

// some long-running code goes here ...

})

println( "Executed the code in $time" )

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