http://duoduokou.com/java/17953968282024960672.html WebJan 16, 2014 · Then convert these groups to dictionary by selecting group key as key and flattened values as value (you can also apply Distinct () before ToList () if you do not want duplicated strings): dict1.Concat (dict2) .GroupBy (kvp => kvp.Key) // thus no duplicated keys will be added .ToDictionary (g => g.Key, g => g.SelectMany (kvp => kvp.Value ...
Dictionary Class (System.Collections.Generic)
Web,c#,linq,list,dictionary,foreach,C#,Linq,List,Dictionary,Foreach. ... var output = dictOfStrings.Concat(dictOfNumbers.ToDictionary(item => Convert.ToString(item.Key), item => Convert.ToString(item.Value))); 这个问题似乎离题了,因为它属于比3行代码更高效的代码。。。你可以用LINQ来做,但是效率是一样的 ... WebJun 9, 2024 · I'm looking for a better way to concatenate dictionary keys, this is what I'm doing now : Dictionary myList = new Dictionary(); myList.Add(1, "value"); myLis...male maternity clothes sims 3
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WebFeb 28, 2024 · var myDictionary = dbContext.myDbTable .Where (i => i.shoesize >= 4) // filter .GroupBy (x => x.Code) // group by Code .Select (g => g.First ()) // select 1st item from each group .ToDictionary (i => i.Code, i => i); You don't need the OrderBy since Dictionary s represent an unordered collection. WebI have a dictionary of lists and was wondering if there was a good way of obtaining all the common values. For instance: Dictionary> myDictionary = new Dictionary>();WebEven though I haven't tested it, I think it could have better performance, since it only enumerates the keys in one dictionary and not the values, you'd use the actual hashing (or whatever is the underlying implementation of the dictionary) to find the values, which is the fastest way to get them. malemas shut down