LINQ查询拆分的有序列表到一些标准的连续点的子列表 [英] LINQ query to split an ordered list into sublists of contiguous points by some criteria

问题描述

寻找帮助，写上一些对象LINQ查询。我觉得如果我的LINQ的技能更忍者，我可以用一些巧妙的GROUPBY /的SelectMany（或某事？！）做到这一点。

Looking for help writing a LINQ query on some objects. I feel if my LINQ skills were more ninja I could do this with some clever GroupBy/SelectMany (or something?!).

一般地说，问题是：给定对象的某种顺序，其中每个对象都有一个标志，我怎么拆列表分为子列表清单？，其中每个子列表是所有的地方设置了标志的连续点的

Stated generically, the question is: given a list of objects in some sort of order, where each object has a Flag, how do I split the list into sub-lists, where each sublist is all of the contiguous points where the flag is set?

这样做的一个必要的方法是像以下伪代码：

An imperative way of doing this would be like the following pseudocode:

foreach object obj
  if(obj.FlagSet) 
    add it to my currentsublist
  else
    skip to the next obj where FlagSet and start a new sublist

因此，考虑下列输入：

{1，旗}，{2，标志}，{3，NoFlag}，{4，标志}，{5，NoFlag}，{6}旗...

{ 1, Flag }, { 2, Flag }, {3, NoFlag }, {4, Flag}, {5, NoFlag}, {6, Flag}...

想我下面的输出：

表1：{1，2}
清单2：{4}
清单3：{6}

List 1: {1, 2} List 2: {4} List 3: {6}

和我想通过LINQ做功能。任何想法？

And I'd like to do it functionally via LINQ. Any ideas?

（我先环顾四周，但所有的问题，我可以看到似乎想要么干脆组列表或分割成大小相等，这不是招。'T很有帮助对我来说）

(I have looked around first, but all the questions I could see appeared to want to either simply group a list or to split into equal sizes, which hasn't been helpful for me.)

推荐答案

这MSDN文章连续值提供了代码组：

This MSDN article provides code to group by contiguous values:

http://msdn.microsoft.com/en-us/library /cc138361.aspx

这不是很漂亮，但效果很好。

It's not pretty, but works well.

在你的情况下，会是这样的：

In your case it would be something like:

myList.ChunkBy( o => o.FlagSet )

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