C# find item in tuple list
Web好吧，你不明白哪一部分？解释在很大程度上取决于你对课程各个部分的理解。你知道a是什么吗？如果您不理解其中的任何内容，那么我建议您阅读一本关于C语言的好书或教程。 WebApr 11, 2024 · Yes I read a C# book and I cannot find anything on it. The internet says that if you want to return multiple items that I can make a list of tuples instead. I learn it now this way. Return a list of tuples. And to my reasoning I should use another method in order to extract the data and turn things to Point3d for example.
C# find item in tuple list
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Web2 days ago · We’re excited to preview three new features for C# 12: Primary constructors for non-record classes and structs. Using aliases for any type. Default values for lambda expression parameters. In addition to this overview, you can also find detailed documentation in the What’s new in C# article on Microsoft Learn. WebIn C# can you define an alias to a value tuple with names? HttpClient single instance with different authentication headers in C#; How does ServicePointManager.ReusePort and SO_REUSE_UNICASTPORT alleviate ephemeral port exhaustion? Get url without querystring in C#; Dependency Injection in attributes; Adding key values for items in …
WebJan 15, 2013 · 24. A little Linq will do the trick: var myStringList = myTupleList.Select (t=>t.Item1).ToList (); As an explanation, since Tim posted pretty much the same answer, Select () creates a 1:1 "projection"; it takes each input element of the Enumerable, and for each of them it evaluates the lambda expression and returns the result as an element of … WebIf you don't need a List, but just an array, you can do: var tupleList = new (int, string) [] { (1, "cow"), (5, "chickens"), (1, "airplane") }; And if you don't like "Item1" and "Item2", you can do: var tupleList = new List< (int Index, string Name)> { (1, "cow"), (5, "chickens"), (1, "airplane") }; or for an array:
WebIn C# we can also use the Create () method to create a tuple without having to mention the datatypes of the tuple elements. The syntax for creating tuple using Create () is: var t1 = … Web2 days ago · We’re excited to preview three new features for C# 12: Primary constructors for non-record classes and structs. Using aliases for any type. Default values for lambda …
WebThe filter function can also provide an interesting solution: result = list (filter (lambda x: x.count (1) > 0, a)) which searches the tuples in the list a for any occurrences of 1. If the search is limited to the first element, the solution can be modified into: result = list (filter (lambda x: x [0] == 1, a)) Share. Improve this answer.
WebMay 7, 2024 · C#中元组主要是方便程序员,不用自然可以。比如:当你返回多个值是否还用ref out 或者返回一个list之类的？ 这些都需要先定义,比较麻烦.元祖在这些场景用的比较多。 先说说基本使用： 初始化：var test_tuple = ("萌萌哒", 1, 3, 5, "加息", "加息"); coffee meal replacement shakeWebMay 3, 2011 · Then you can say: var mostRecent = tuples.Where (x => MatchesFileMask (fileMask, x.Item1) .Max (x => x.Item2); var data = new List> (); // add some data var maxTimestamp = data.Where (t => MatchesFileMask (t.Item1)).Max (t => t.Item2); Of course I cheated by assuming there's a MatchesFileMask predicate already … camelyon groupWebNov 21, 2015 · Why is your key a tuple? A good reason for it, or are you just trying to get a list of items? If so use List> instead. You can use Max in the answer below on any Enumerable collection. If you want, post your code on Code Review and link to it here. Might be a much nicer way of doing whatever it is you are trying to do. – camelyon grand challenge