如何通过return语句返回每个foreach -loop元素 [英] how to return each foreach -loop element through return statement

问题描述

public Circle3D GetSphereCircle(BaseLibrary.VIEWCODE viewCode)
{
          
    List<vec3> VectorList = new List<vec3>();
    Vec3 vec = new Vec3(0, 0, 0);

     -----
   

    foreach (Vec3 vector in VectorList)
    {
        refPlane = new Plane3D(new Plane3(centPt, vector), false);
        circle = new Circle3D(new Circle3(centPt, _local_data._radius), refPlane, false);
    }
    return circle;
}

上面我给出了短代码片段，我想返回foreach循环中生成的每个'circle'，我该怎么做？

Above i am given short code snippet,i want to return each 'circle' generated in foreach loop,how i can do that?

推荐答案

合理的方法是返回一个容器（例如 List ）的圆圈，当然这意味着要更改调用者代码但是，任何其他方法（据我所知）都会参与其中。

A reasonable way is returning a container (e.g. a List) of circles, of course this implies changing the callers code, but any other approach (as far as I can see) would be rather involved.

要添加CPallini所说的 - 而且他是对的 - 唯一的另一种方法是收益率回报： https://msdn.microsoft .com / zh-CN / library / 9k7k7cf0.aspx [ ^ ]使其成为迭代器方法。

To add to what CPallini has said - and he's right - the only other way to do it would involve a yield return: https://msdn.microsoft.com/en-us/library/9k7k7cf0.aspx[^] making it into an iterator method.

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