How can I define two dimensional dynamic array? If I want to use List<>, can I use it for two dimensions?
What is the use of default keyword in C#? Is it introduced in C# 3.0 ?
How can I define two dimensional dynamic array? If I want to use List<>, can I use it for two dimensions?
我知道,不存在两维阵列的内在动态等同,但你可以轻松地获得同样功能。
1. 界定与本《行动计划》一致的类别:
public class Coordinate : IEquatable<Coordinate>
{
public Coordinate(int x, int y);
public int X { get; }
public int Y { get; }
// override Equals and GetHashcode...
}
现在,你可以创立一系列这样的协调事例。
如果你创立了
如果你想要的话,你可以把坐标扩大到<代码>。 Co coordinated<T> as this:
public class Coordinate<T> //...
{
// previous stuff...
public T Item { get; set; }
}
这将使你能够把一个严格类型的项目与每个协调结合起来,例如:
var items = new HashSet<Coordinate<string>>();
items.Add(new Coordinate<string>(1, 4) { Item = "Foo" });
items.Add(new Coordinate<string>(7, 19) { Item = "Foo" });
// ...
这将是这样的:
List<List<string>> twoDimensional = new List<List<string>>();
但我认为,利用名单来做到这一点是不现实的,更好地利用阵列......
您可使用清单,例如: 清单和编号非常快。
但是,通过两阵列,你们需要:
int[,] arr = new int[100,100];
这应当比清单更快。
http://msdn.microsoft.com/en-us/library/a288453%28VS.71%29.aspx” rel=“nofollow noreferer” 此处的任何途径是:type[,] name
for multi ranges,type [] 标签阵列名称代码>(改动<代码> 类型
,用于储存阵列的物体类型)。
你们的阵列永远不会有活力。
各位都可以通过名单(除非你通过提供额外索引来看待某个问题),除非你简单地寻找名单(这不是多维)。
这将是(图示清单):
List<List<string>>
Dictionary<T, List<T>>
例如,如果T是“扼制”的话,你可以这样使用:
var pathes = new Dictionary<string, List<string>>();
pathes.Add("X", new List<string>());
pathes["X"].Add("a");
pathes["X"].Add("b");
pathes["X"].Add("c");
pathes.Add("Y", new List<string>());
pathes["Y"].Add("b");
pathes["Y"].Add("z");
What is the use of default keyword in C#? Is it introduced in C# 3.0 ?
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