查找匹配使用LINQ的条件元素的第一个索引 [英] Finding first index of element that matches a condition using LINQ

问题描述

var item = list.Where(t => somecondition);

我希望能够找出返回，实际上元素的索引，在我的情况下，我要的是一个索引，这样我就可以.Skip（）到列表中那么多。

I would love to be able to find out the index of the element that was returned, in fact, in my case all I want is an index, so that I can .Skip() into the list by that much.

有没有办法在一个IEnumerable做到这一点？我讨厌使用列表< T> 这一点，但确实有一个 FindIndex（）方法

Is there a way to do this in an IEnumerable? I'd hate to use a List<T> for this, but that does have a FindIndex() method

推荐答案

我需要更多的上下文，但如果你只是得到一个索引，使您可以拨打 .Skip ，我会建议采取看看 .SkipWhile 。

I'd need more context, but if you're just getting an index so that you can call .Skip, I would recommend taking a look at .SkipWhile.

如果你真正需要的指数，我建议编写自己的 .IndexOf 扩展方法。

If you do really need the index, I'd suggest writing your own .IndexOf extension method.

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