Question

public class Item
{
  public double findMe{ get; set; } 
  public int? iMayBeNull { get; set; }
}

public Dictionary<int, ICollection<Item>> TheDictionary{ get; set; }

...

TheDictionary dict = new Dictionary<int, ICollection<Item>>();

在“i May BeNull”的“i May BeNull”的收集中,Im试图找到“findMe”的最低价值。

I can t seem to wrap my head around this one.

任何指导都将受到高度赞赏。

Answer 1

使用<代码>SelectMany将所有收集资料合并为一个大序列,然后使用标准<代码>。和。 Min 营运人:

TheDictionary.Values
    .SelectMany(x => x)
    .Where(x => x.iMayBeNull == null)
    .Min(x => x.findMe);

Answer 2

准则的表述与<代码>电子选择/code”方法平行,是条款中的多重表述。

<>>Example:

var seq = from col in dict.Values
            from item in col
            where item.iMayBeNull == null
            select item.findMe;

var min = seq.Min();

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