int[][] jaggedArray = new int[3][];
jaggedArray[0] = new int[] { 1, 2 };
jaggedArray[1] = new int[] { 3, 4, 5 };
jaggedArray[2] = new int[] { 6, 7, 8, 9 };
嵌套
反转和排序
List<int> list = new List<int> { 1, 2, 3, 4, 5 };
list.Reverse();
Console.WriteLine(string.Join(", ", list)); // 输出:5, 4, 3, 2, 1
int[] array = { 5, 3, 4, 1, 2 };
Array.Sort(array);
Console.WriteLine(string.Join(", ", array)); // 输出:1, 2, 3, 4, 5
转换
(toarray join)
List<string> wordList = new List<string>(words);
List<int> intList = new List<int>(intArray)
toarray
List<int> numbers = new List<int> { 1, 2, 3, 4, 5 };
string result = string.Join("", numbers);
join第一个是分隔符
增删改
数组字符串
索引
Array.Copy(array, 2, slice, 0, 3);
xxx字符串.substring(索引,长度)
列表
add
remove removeat
索引
foreach (int I In )
arraylist 自动扩容 arraylist (2)限定了长度也会扩容
var list =new list ﹤>(){}
避免装箱拆箱操作
list.contains
var hashtable=new hashtable
containskey
var dic =new dictionary <,>
var queue new queue
enqueue
dequeue
stack push pop