If you haveguava libraryin the project then you can also use theImmutableList.copyOf()method to get immutable list out of an array. List<String>namesList=ImmutableList.copyOf(namesArray); 3. Convert Array to Mu
FloatArrayEstimator java.lang.Object |---ohos.agp.animation.util.FloatArrayEstimator public class ……欲了解更多信息欢迎访问华为HarmonyOS开发者官网
* This library is free software; you can redistribute it and/or @@ -116,7 +116,7 @@ object CalibrateTask { private def showScatterChart(x: IndexedSeq[IndexedSeq[Double]], y: IndexedSeq[IndexedSeq[Double]], seriesLabels: Array[String], seriesLabels: IndexedSeq[String], chartTitle: Strin...
NSLog(@"self.dataArray count is:%d",[self.dataArray count]); NSLog(@"self.dataArray index 2 is:%@",[self.dataArray objectAtIndex:2]); ---从一个数组拷贝数据到另一数组(可变数级)--- //arrayWithArray: NSArray *array1 = [[NSArray alloc] init]; NSMutableArray *MutableArray = [[N...
Arrays in Scala are generally immutable, so we need to create a new array that will store the concatenated array in Scala. Or another method could be creating mutable arrays that will save memory. For merging two arrays Scala provides you multiple methods and we will discuss them one by one...
### tuple is immutable,无法删减元素 ### ### tuple 加减乘除 ### x_double = x_tpl * 2 # x_double = (1,2,4,6,1,2,4,6) x_plus_y = x_tpl + y_tpl # x_plus_y = (1, 2, 4, 6, 1, 3, 6, 9) print(min(x_tpl),max(x_tlp),sum(x_tpl)) # 最大、最小、求和 ...
Using add() Mutable O(n) Manual iteration required, flexible Arrays.asList() Immutable O(1) Fixed-size list, backed by the original array Collections.addAll() Mutable O(n) Efficient for adding elements Java 8 Streams Mutable O(n) Functional approach, concise Mahesh...
在Scala中,把哈希表这种数据结构叫做映射 1. 构建映射 2. 获取和修改映射中的值 好用的getOrElse 注意:在Scala中,有两种Map,一个是immutable包下的Map,该Map中的内容不可变;另一个是mutable包下的Map,该Map中的内容可变 例子: 注意:通常我们在创建一个集合是会用val这个... ...
last java.lang.UnsupportedOperationException: empty.last at scala.collection.immutable.Array.last(Array.scala:197) ... 28 elided How to “update” Array elements Because Array is immutable, you can’t update elements in place, but depending on your definition of “update,” there are a ...
copy 与 mutableCopy (1) 方法简介 拷贝方法 : -- copy 方法 : 复制对象的副本, 一般返回对象可修改的副本;假如被复制的对象是可修改 NSMutableString, 复制后成为NSString 不可修改; -- mutable 复制对象的可变副本, 返回对象的可变副本; 假如被复制对象不可修改 如 NSString, 使用...