如果值在 range(x,y) 函数 c# [英] If value in range(x,y) function c#
问题描述
c# 是否有一个函数可以为表达式返回一个布尔值:if(value.inRange(-1.0,1.0)){}?
Does c# have a function that returns a boolean for expression : if(value.inRange(-1.0,1.0)){}?
推荐答案
说明
我建议您使用扩展方法.
Description
I suggest you use a extension method.
扩展方法使您能够向现有类型添加"方法，而无需创建新的派生类型、重新编译或以其他方式修改原始类型.
Extension methods enable you to "add" methods to existing types without creating a new derived type, recompiling, or otherwise modifying the original type.
您可以以通用方式创建此扩展方法(感谢 digEmAll 和 CodeInChaos，他们建议这样做).然后你可以在每个实现 IComparable 的对象上使用它.
You can create this extension method in a generic way (thx to digEmAll and CodeInChaos, who suggest that). Then you can use that on every object that implements IComparable.
public static class IComparableExtension
{
public static bool InRange<T>(this T value, T from, T to) where T : IComparable<T>
{
return value.CompareTo(from) >= 1 && value.CompareTo(to) <= -1;
}
}
然后你这样做
double t = 0.5;
bool isInRange = t.InRange(-1.0, 1.0);
完美主义者的更新
在与@CodeInChaos 进行广泛讨论后，他说
Update for perfectionists
After an extensive discussion with @CodeInChaos who said
我可能会按照之前的评论中的建议使用 IsInOpenInterval.但我不确定没有数学背景的程序员是否会理解该术语.
I'd probably go with IsInOpenInterval as suggested in an earlier comment. But I'm not sure if programmers without a maths background will understand that terminology.
您也可以将函数命名为 IsInOpenInterval.
You can name the function IsInOpenInterval too.
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