我们使用map的keySet()方法获取所有键,并从中创建一个ArrayList键列表。同样,我们使用map的values()方法获取所有值,并从中创建一个ArrayList valueList。 以下是等效的Java代码:用于将map转换为list的Java程序。 Kotlin 实例大全 Kotlin 实例大全
在Kotlin 中,您可以通過調用 toList() 地圖實例上的功能。 1 2 3 4 5 6 7 8 9 fun main() { val hMap: MutableMap<String, Int> = HashMap() hMap["A"] = 65 hMap["B"] = 66 hMap["C"] = 67 val entries: List<String> = hMap.toList().map { "(${it.first}, ${it.second}...
Check out the following example, which converts a map into a list. Example 1: packagemaptolist;importjava.util.HashMap;importjava.util.List;importjava.util.Map;importjava.util.stream.Collectors;publicclassMapToList{publicstaticvoidmain(String[]args){Map<Integer,String>M2L=newHashMap<>();M2L....
David Mbochi Njonge20 junio 2023KotlinKotlin ListKotlin Map Kotlin proporciona diferentes colecciones; los más comunes incluyenLista,MapayConjunto. A la hora de desarrollar aplicaciones, hay situaciones en las que nos vemos obligados a convertir un tipo de colección en otro para conseguir un ...
This example demonstrates how to convert a Bitmap to Drawable in Kotlin. Step 1 − Create a new project in Android Studio, go to File? New Project and fill all required details to create a new project. Step 2 − Add the following code to res/layout/activity_main.xml. Example <?
options.compilerArgs = listOf("-Xlint:deprecation", "-Xlint:unchecked") } compileJava.apply { source = generateJavaSources.source dependsOn(generateJavaSources) } jar.apply { baseName = project.name manifest.attributes(mapOf( "Implementation-Version" to version, "Automatic-Module-Name" to "net...
One of the approaches is to use Kotlin’s default mutable and immutable collections. As an example, let’s take a look at MutableList and List. First, we’ll create a mutable list and add an element to it: val mutableList = mutableListOf<String>() mutableList.add("Hello") // Prints ...
These days, the majority of developers use Swift, which is more preferable to startups. More information about iOS development can be read here: “Swift vs Objective-C. Which iOS Language To Choose”. Kotlin and Java, programming languages used in Android development. ...
private fun getFilteredProducts(): Single<List<Product>> { return Single.just( allProducts ).map { products -> products.sortedBy { it.price }.filter { it.price > 500 } }.subscribeOn(Schedulers.io()) } Let’s also prepare a function we can use later to validate that the results are...
operator fun invoke(conversionName: String, messages: List<Message> = listOf()): ChatSession<Message> = ChatSession<Message>(conversionName, messages.map { SessionMessageItem(it, END) }) } } fun <T> ChatSession<T>.canSendNextMessage() = this.status == END fun <T> ChatSession<T>.app...