只读Map。 可变的MutableMap(MutableMap、HashMap、LinkedHashMap)。 Map源码: private object EmptyMap : Map<Any?, Nothing>, Serializable { private const val serialVersionUID: Long = 8246714829545688274 override fun equals(other: Any?): Boolean = other is Map<*,*> && other.isEmpty() override fu...
问如何在函数中返回带有列表参数的MutableMap(HashMap)，以查找列表中每个元素的频率(Kotlin)EN在 Python...
These functions may have different features (e.g., the elements are always sorted) or be backed by different elements (e.g., an HashMap). Maps 代码语言:javascript 代码运行次数:0 运行 AI代码解释 val map: MutableMap<Int, String> = mutableMapOf(1 to "three", 2 to "three", 3 to "...
//创建可变Mapvar mapM = mutableMapOf("Kotlin" to 19, "Java" to 51, "Flutter" to 15)println(mapM)//{Kotlin=19, Java=51, Flutter=15}//添加元素mapM.put("iOS", 36)println(mapM)//{Kotlin=19, Java=51, Flutter=15, iOS=36}//删除元素FluttermapM -= "Flutter"println(mapM)//{Ko...
因此,我创建了具有MutableLiveData<HashMap<String, Boolean>>的ViewModel。 class PhoneFillClass : ViewModel() { var _phoneFillCheck = MutableLiveData<HashMap<String, Boolean>>() var phoneFillCheck = _phoneFillCheck.value init { phoneFillCheck = hashMapOf( ...
): Boolean { if (arg == null) return false return buildCountsMap(arg, refEq) == map } private fun buildCountsMap(list: List<T>, ref: Boolean): Map<Any?, Int> { val map = mutableMapOf<Any?, Int>() for (item in list) { val key = when { item == null -> nullKey ref...
Map<K, V> Map<K, V> MutableMap<K, V> (Mutable)Map<K, V>! Map.Entry<K, V> Map.Entry<K, V> MutableMap.MutableEntry<K,V> (Mutable)Map.(Mutable)Entry<K, V>! Java 的数组映射: Java 类型Kotlin 类型 int[] kotlin.IntArray! String[] kotlin.Array<(out) String>! Kotlin 中使用 ...
Kotlin Coroutines, ConcurrentHashMap 我正在尝试将作为示例TDLib提供的代码Java Example转换为Kotlin Coroutines。我遇到了一些无法解决的问题。 在下面的代码片段中,当应用程序启动时,它有时会因并发异常而崩溃 private val chats: ConcurrentHashMap<Long, TdApi.Chat> = ConcurrentHashMap()...
使用kotline命令运行Kotlin生成的.jar文件。 $ vim user.kt class User(val name:String){ fun output(){ println("hello $name") } } fun main(args:Array<String>){ User("junchow").output() } $ kotlinc user.kt -d user.jar $ kotlin -classpath user.jar User ...
val mapOfItems = hashMapOf(1 to "x", 2 to "y", -1 to "zz") mapOfItems.map { (key, value) -> println("$key = $value") } It's worth noting that this is quite anti-pattern for the map-function. It is meant for mapping an iterable of one type into an iterable of an...