算法来检测重叠时段 [英] Algorithm to detect overlapping periods

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本文介绍了算法来检测重叠时段的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!

问题描述

我已经来检测,如果两个时间段是重叠的。

I've to detect if two time periods are overlapping.

每一个时期都有一个开始日期和结束日期。

Every period has a start date and an end date.

我需要检测,如果我的第一时段(A)与另一个(B / C)重叠。

I need to detect if my first time period (A) is overlapping with another one(B/C).

在我的情况下,如果B的开始等于A的结束,他们不重叠(逆太)

In my case, if the start of B is equal to the end of A, they are not overlapping(the inverse too)

我发现了以下情况:

所以,其实我这样做是这样的:

So actually I'm doing this like this:

tStartA < tStartB && tStartB < tEndA //For case 1
OR
tStartA < tEndB && tEndB <= tEndA //For case 2
OR
tStartB < tStartA  && tEndB > tEndA //For case 3

(该壳体4被取入帐户而在壳体1或情况2)

(The case 4 is taken in account either in case 1 or in case 2)

工作,但它似乎不是很有效。

It works, but it seems not very efficient.

因此​​,首先是有一个现有的类在C#中,可以modelize这个(时间),有点像timepsan,但有一个固定的起始日期。

So, first is there an existing class in c# that can modelize this(a time period), something like a timepsan, but with a fixed start date.

二:有没有已经交流#code(如在DateTime类),它可以处理这个

Secondly: Is there already a c# code(like in the Datetime class) which can handle this?

第三:?如果没有,这将是你的方法,使这种比较最快速的

Third: if no, what would be your approach to make this comparison the most fast?

推荐答案

简单的检查,看看两个时间段重叠的:

Simple check to see if two time periods overlap:

bool overlap = a.start < b.end && b.start < a.end;

,或在code:

or in your code:

bool overlap = tStartA < tEndB && tStartB < tEndA;

(使用&LT; = 而不是&LT; 如果您改变了主意,想要说,两个时期只是互相接触重叠。)

(Use <= instead of < if you change your mind about wanting to say that two periods that just touch each other overlap.)

这篇关于算法来检测重叠时段的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!

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