Question

我有一条从第二个项目开始计算所有价值(dec价值)的总和的字典。是否可使用LINQ?

Answer 1

采用LINQ可实现:

myDict.Skip(1).Sum(x => x.Value);

However, the standard Dictionary class doesn t guarantee ordering of items, so the "first" item can be anything.

Answer 2

为什么不仅仅把他们归到一起,然后把第一个项目抛开?

myList.Sum(x => x.Value) - myList.First().Value;

Answer 3

因此,第一点是空洞的;

dict.Skip(1).Sum(ix => ix.Value);

Answer 4

• 便于使用准则;

var dict = new Dictionary<string, decimal>();

dict.Add("A", 1.5m); // This value will be skipped
dict.Add("B", 2.7m);
dict.Add("C", 1.3m);
dict.Add("D", 3.9m);

var total = dict.Skip(1).Sum(v => v.Value);

Console.WriteLine(total);

Answer 5

2. 选择第一个项目的关键,将其从中排除:

dict.Sum(T => T.Key == "FirstKey" ? 0 : T.Value);

Answer 6

收取<条码>电视议程项目

total = d.Skip(0).Sum(x => x.Value)

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