最好的方法来测试两个valarray< double> [英] Best way to test for equality of two valarray<double>?

问题描述

我认为 == 为 valarray 的默认重载不是很方便。默认情况下 x == y （对于两个valarrays x和y）返回 valarray 如果 x [i] == y [i] ，则 i c $ c>。相反，我需要一个 bool ，它告诉我如果 valarray< double> 包含相同的元素。我知道我可以做一个周期，但必须做的周期每次都不方便。这里最好的解决方法是什么？有没有办法为我定义自己的重载 == （还有！= ，<$ c $

I think that the default overload of == for valarray is not very convenient. By default x==y (for two valarrays x and y) returns a valarray<bool>, with true on the ith entry if x[i]==y[i]. Rather, I need a single bool, which tells me if both valarray<double> contain the same elements or not. I know I can do this with a cycle, but having to do the cycle every time is not convenient. What's the best workaround here? Is there a way for me to define my own overload of == (and also !=, <, and so on)?

推荐答案

不是很方便？这个行为正是为 valarray 的原因。

"Not very convenient"? This behaviour is exactly the reason for valarray.

要覆盖它将是完全自我毁灭的。

To override it would be entirely self-defeating.

如果你不喜欢，只需使用向量。

If you don't like it, just use a vector instead.

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