Val destination = Collections.synchronizedList(ArrayList(defaultSize))Įxec.submit Īlso you can change the entry point as you like other than using extension properties, e.g. groupBy makes a map of the element in the collection using the predicate function provided as a parameter. Val defaultSize = if (this is Collection) this.size else 10 Kotlin has an awesome function that can help you achieve this. default size is just an inlined version of This hands-on book helps you learn the Kotlin language with a unique method that goes beyond syntax and how-to manuals and teaches you how to think like a great Kotlin developer. NumThreads: Int = Runtime.getRuntime().availableProcessors() - 2,Įxec: ExecutorService = Executors.newFixedThreadPool(numThreads), Head First Kotlin Griffiths, Dawn, 'Head First Kotlin is a complete introduction to coding in Kotlin. The filtering conditions are defined by predicates lambda functions that take a collection element and return true when the given element matches the predicate, and false means it doesn’t match the predicate. There is no official support in Kotlin's stdlib yet, but you could define an extension function to mimic par.map: fun Iterable.pmap( In Kotlin, filtering is a prominent task of collection processing.
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