复制// 1.用指定的方法排序,可变数组排序 NSMutableArray *arr1 = [NSMutableArray arrayWithObjects:@"sunday", @"sunny", @"summer", @"sun", nil]; // 原数组的顺序改变,指定元素的比较方法:compare:,默认排序方式为升序排列 [arr1 sortUsingSelector:@selec
When the array constructor is called with a single argument,a, whose value is an existing array, a copy ofais returned. Since arrays are mutable objects, and assignment in Maple is by-reference, making a copy of an array to work with is useful when you do not want to modify the origin...
init(unsafeUninitializedCapacity: Int, initializingWith: (inout UnsafeMutableBufferPointer<Element>, inout Int) throws -> Void) rethrows Creates an array with the specified capacity, then calls the given closure with a buffer covering the array’s uninitialized memory. Inspecting an Array var isEmpty...
Array is mutable, but fixed length. Which means you can modify items in the Array, but you cannot add / remove item; //Array is fixed length, you cannot add or remove itemval ary: Array<String> = arrayOf("Wan", "Zhen", "Tian") ary[1] = "gg"println(ary.contains("gg"))//tru...
The array associated with the specified key, ornilif the key does not exist or its value is not an array. Discussion The returned array and its contents are immutable, even if the values you originally set were mutable. See Also Related Documentation ...
In Python, a bytearray is a mutable sequence of bytes. It can be used to store and manipulate binary data, such as images or sound files. However, sometimes you may need to convert a bytearray to a single byte. This article will discuss how to achieve this in Python. ...
elementType is not a valid Type. -or- The lengths array contains less than one element. NotSupportedException elementType is not supported. For example, Void is not supported. -or- elementType is an open generic type. ArgumentOutOfRangeException Any value in lengths is less than zero. Example...
顾名思义,NSArray是一个数组类。使用NSArray类可以存储、处理元素。 Foundation框架中关于数组的类有2个:NSArray和NSMutableArray。NSArray是不可变数组,数组建立后不可以添加、删除元素,不可以更改元素。NSMu…
The Scala Array class is a mutable, indexed, sequential collection. Unlike the Scala ArrayBuffer class, the Array class is only mutable in the sense that its existing elements can be modified; it can’t be resized like ArrayBuffer. If you’re coming to Scala from Java: You can think of ...
今天在数组里添加内容的时候出现这样的错误: 原因是将不是数组的元素添加到数组里面, [self.selectArr addObjectsFromArray:self.dataArr[indexPath.row]]; 解决方案: 只需要将添加的时候调用: addObject:方法即可 [self.selectArr addObject:self.dataArr[indexPath.row]];...