Kotlin is on its way to overtaking Java on that mobile platform, claims mobile database maker Realm.
Sorgente: Kotlin could overtake Java on Android next year | InfoWorld
Tag: kotlin
Kotlin, a high-performance, statically typed “pragmatic language” that leverages the environment of Java Virtual Machine, has reached its official 1.0 release milestone. Created by IDE makers JetBrains, Kotlin — like many other non-Java languages that run on the JVM — is meant to run where Java runs and make use of the existing culture of Java libraries and tooling. Java, in turn, can use items built in Kotlin.
http://www.javaworld.com/article/3033798/java/jetbrains-kotlin-jvm-language-appeals-to-the-java-faithful.html#tk.rss_all
Mi ci è voluta più di qualche imprecazione per arrivare a questa implementazione :
fun Shop.getSetOfProductsOrderedByEveryCustomer(): Set<Product> {
return customers.fold(allOrderedProducts, {
orderedByAll, customer ->
orderedByAll.minus( orderedByAll.filter { !customer.orderedProducts.contains(it) }) })
}
Salvo poi scoprire nelle soluzioni che esisteva il magico intersect
fun Shop.getSetOfProductsOrderedByEveryCustomer(): Set<Product> {
// Return the set of products ordered by every customer
return customers.fold(allOrderedProducts, {
orderedByAll, customer ->
orderedByAll.intersect(customer.orderedProducts)
})
}
L’esercizio era questo : https://github.com/Kotlin/kotlin-koans/blob/master/src/ii_collections/_22_Fold_.kt
Comunque Kotlin è bellissimo.
This tutorials walks you through a series of exercises to get familiar with Kotlin.
https://kotlinlang.org/docs/tutorials/koans.html
Statically typed programming language for the JVM, Android and the browser
https://kotlinlang.org/