C# 如何初始化一个Point数组？
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How to initialize an array of Point?
提问by Mixer
I need to initialize an array of three points. I want to write it like below, but only once for three elements.
我需要初始化一个由三个点组成的数组。我想像下面那样写它，但对于三个元素只写一次。
Point P = new Point { X = 0, Y = 1 };
Point[] P = new Point[3];// <---- ?
How to write correctly?
如何正确书写？
采纳答案by Marek Musielak
Here is the code for creating the array of 3 different points:
这是用于创建 3 个不同点的数组的代码：
Point[] points = new Point[] { new Point { X = 0, Y = 1 }, new Point { X = 2, Y = 1 }, new Point { X = 0, Y = 3 } };
回答by Ry-
There's not really a shorthand for that. For three, just write it three times:
没有真正的简写。对于三个，只需写三遍：
Point initial = new Point { X = 0, Y = 1 };
Point[] P = new Point[3] { initial, initial, initial };
回答by Larry
Because you question deals about a static fixed length array of point with static coordinates, no needs to bother with LINQ and loops in this context when array initialization is that simple.
因为您对具有静态坐标的点的静态固定长度数组有疑问，所以当数组初始化如此简单时，无需在此上下文中理会 LINQ 和循环。
So you can initialize an array this way:
所以你可以这样初始化一个数组：
Point[] P = new Point[]
{
new Point { X = 0, Y = 1 },
new Point { X = 0, Y = 1 },
new Point { X = 0, Y = 1 },
...
};
or use duck typingtype inference (thanks minitech):
或使用鸭子类型推断（感谢minitech）：
var P = new []
{
new Point { X = 0, Y = 1 },
new Point { X = 0, Y = 1 },
new Point { X = 0, Y = 1 },
...
};
回答by cuongle
Example below you can create 10 Pointusing Enumerable.Range
下面的示例您可以Point使用创建 10Enumerable.Range
var points = Enumerable.Range(0, 10)
.Select(x => new Point {X = 0, Y = 1})
.ToArray();
回答by platon
Here is the shortest solution:
这是最短的解决方案：
Point[] points = Enumerable.Repeat<Point>(new Point(0, 1), 3).ToArray();
