更改数组大小 [英] change array size

问题描述

是否可以在声明后更改数组大小?如果没有，是否有任何替代数组的方法?
我不想创建一个大小为 1000 的数组，但是我在创建它时不知道数组的大小.

Is it possible to change an array size after declaration? If not, is there any alternative to arrays?
I do not want to create an array with a size of 1000, but I do not know the size of the array when I'm creating it.

推荐答案

不，请尝试使用强类型 列表 代替.

No, try using a strongly typed List instead.

例如:

代替使用

int[] myArray = new int[2];
myArray[0] = 1;
myArray[1] = 2;

你可以这样做:

List<int> myList = new List<int>();
myList.Add(1);
myList.Add(2);

列表使用数组来存储数据，因此您可以通过 LinkedList 的便利性来获得数组的速度优势，因为您可以添加和删除项目而不必担心手动 改变它的大小.

Lists use arrays to store the data so you get the speed benefit of arrays with the convenience of a LinkedList by being able to add and remove items without worrying about having to manually change its size.

这并不意味着数组的大小(在这个例子中，一个 List)没有改变 - 因此强调手动这个词.

This doesn't mean an array's size (in this instance, a List) isn't changed though - hence the emphasis on the word manually.

一旦您的数组达到其预定义的大小，JIT 就会在堆上分配一个两倍大小的新数组，并复制现有数组.

As soon as your array hits its predefined size, the JIT will allocate a new array on the heap that is twice the size and copy your existing array across.

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