在Kotlin中遍历Map<String, Array<Any>>可以使用循环结构和相应的遍历方法。下面是一个示例代码: 代码语言:txt 复制 val map: Map<String, Array<Any>> = hashMapOf( "key1" to arrayOf("value1", 1), "key2" to arrayOf("value2", 2), "key3" to arrayOf("value3", 3) ) for ((key, ...
println("data=${JSON.toJSONString(data)}") println("开始执行 saveDataJson") val modelCodeSet = mutableSetOf<String>() data.forEach { it.modelCode?.let { v -> modelCodeSet.add(v) } } println("modelCodeSet=${JSON.toJSONString(modelCodeSet)}") val dataJsonObj = hashMapOf<String, H...
需要使用FastJson/Gson将HashMap转为String。如果使用toString()方法进行转换时,是无法将字符串再转为...
String>=HashMap()overridefunonCreate(savedInstanceState:Bundle?){super.onCreate(savedInstanceState)setContentView(R.layout.activity_huffman_zip)// 定义准备进行编码的字符串varsomeStr="to be or not to be to be or not to be to be or not to be"// 进行赫夫曼转码varhuffZipArr=huffmanZip...
I have HashMap in Kotlin val map = HashMap<String, String>() map.put("key1","value1"); map.put("key2","value2"); map.put("key3","value3"); How to convert it into String in JSON format? like {"key1": "value1", "key2": "value2", "key3": "value3"} android k...
第一种方法:你可以使用 String,代码看起来很安全,但是会抛出 NullPointerException 异常。 fundoSth(text:String){ valf: String = Utils.format(text)// compiles but assignment can throw NPE at runtime println ("f.len : "+ f.length) }
java.util.HashMap$KeySet不能强制转换为java.lang.String[] 下面是我的代码: var ringtoneNamesToURIs: MutableMap<String, String> = getRingtoneList() var ringtoneNames: Array<String> = ringtoneNamesToURIs.keys as Array<String> val ringtoneSpinner = root.findViewById(R.id.ringtoneSpinner) as Sp...
Given that you need to mutate the list often, I would suggest to change the type of data to HashMap<String, ArrayList<String>>. Then you can perform last two operations as //replace data["Training Day 2"]?.let { it[it.indexOf("Player8")] = "Player1" } // add data["Training ...
classDotMapHelper@JvmOverloadsconstructor(hashMap: HashMap<String, Any?> = hashMapOf()) : BaseDotMapHelper<DotMapHelper>(hashMap) {varmoduleId: String?byhashMap.withDefault {null}varmodulePosition:Int?byhashMap.withDefault {null}varposition:Int?byhashMap.withDefault {null}vartype:Int?byhashMap...
Set setOf mutableSetOf、 hashSetOf、linkedSetOf、sortedSetOf Map mapOf mutableMapOf、hashMapOf、linkedMapOf、sortedMapOf 对象 和 基本数据类型的数组 默认情况下,应该优先使用集合,而不是数组。 Kotlin中数组是一个带有类型参数的类,其元素类型被指定为相应的类型参数 fun printArray(args: Array<String>)...