Get random key from dictionary c#
WebNov 16, 2016 · var randomDict = sillyDict .GroupBy (kv => kv.Value) .ToDictionary ( m => m.Key, m => m.Select (kv => kv.Key) .OrderBy (k => Guid.NewGuid ()) .Take (1) .First ()); This will get you a Dictionary wherein the first string is the type of food (ie. Italian, Sushi) and the second is the random Restaurant. WebSep 4, 2024 · public string GetQuestion1 () { var key = keys [index]; // (...) } index here is, again, the field declared in the body class, that was never touched and have always the default value of 0. If what you want is to update the value of index in the He method for further reference, you should just refer to it, withoud declaring a type:
Get random key from dictionary c#
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WebYou could do that: By looping through all the KeyValuePair's in the dictionary (which will be a sizable performance hit if you have a number of entries in the dictionary); Use two dictionaries, one for value-to-key mapping and one for key-to-value mapping (which would take up twice as much space in memory). WebTo get a random element from a HashSet in C# quickly, you can use the ElementAt method in combination with the Random class. Here's an example: csharpusing System; using System.Collections.Generic; using System.Linq; public class MyClass { private readonly Random _random = new Random(); public void GetRandomElement(HashSet …
Web2 days ago · Trying to get the item from dictionary (dictionary.TryGetValue...) can be put outside of lock statement. Lock only when item is not found and then, inside the lock ask again if it's not there, since many threads might find the first condition (dictionary.TryGetValue...) as false, and only if it's still false perform the insert. WebAug 22, 2014 · This is a 2 part question, I am making a blackjack game and I am trying to randomly generate a key and value (KEY = string (card value e.g. Hearts2), And VALUE = int (Score for that specific card value)), and I would like to try and return the key and value. I have a deck, dealer and player class.
WebNov 24, 2013 · Then set the termLabel text to the chosen key value (which is a string), and the definitionLabel text to the specified value (also a string). I will be happy to provide clarification, as I am barely learning how to use visual c#. Here is my dictionary. Dictionary terms = new Dictionary () //Here is how terms … WebAug 14, 2012 · Dictionary dict = GetYourHugeHashTable (); KeyValuePair randomItem = dict.First (); DoAComputation (randomItem.Key, randomItem.Value); dict.Remove (randomItem.Key); Share Improve this answer Follow answered Aug 14, 2012 at 21:50 David Yaw 27.2k 4 62 93 Add a comment 2 with Linq …
WebLastly, added the item I created to the dictionary (on void start) dicionarioItems.Add(Emspada.name, Emspada); But I can't get any value/key from the dictionary. I don't know how to reference the Key, like. itemsDictionary[Emspada.name] Because theres no Emspada in current context. How do I get the Key/string value so I …
WebHere are separate functions to get a key, value or item: import random def pick_random_key_from_dict(d: dict): """Grab a random key from a dictionary.""" keys = list(d.keys()) random_key = random.choice(keys) return random_key def pick_random_item_from_dict(d: dict): """Grab a random item from a dictionary.""" … tim shepley obituaryWebDec 20, 2012 · Just use the Linq First (): var first = like.First (); string key = first.Key; Dictionary val = first.Value; Note that using First on a dictionary gives you a KeyValuePair, in this case KeyValuePair>. Note also that you could derive a specific meaning from the use of First by combining it with ... tim shepherd mdWebMay 27, 2024 · You can sort dictionary by using OrderBy (for find min value) or OrderByDescending (for max value) then get first element. It also help when you need find second max/min element Get dictionary key by max value: double min = results.OrderByDescending (x => x.Value).First ().Key; Get dictionary key by min value: tim shepherd ohioWebApr 12, 2024 · 数据加密 解密、登录验证. Encryption C#加密解密程序及源代码，加密主要分两步进行，第一步选择文件，第二步随机产生对成加密钥匙Key和IV、使用发送者私钥签名随机密钥，使用接收者公钥加密密钥和签名、利用随机密钥使用DES算法分组加密数据... tim shepherd\u0027s gang the outsidersWebAug 29, 2012 · Just use the key name on the dictionary. C# has this: Dictionary dict = new Dictionary (); dict.Add ("UserID", "test"); string userIDFromDictionaryByKey = dict ["UserID"]; If you look at the tip suggestion: Share Improve this answer Follow edited Nov 8, 2024 at 4:15 Peter Mortensen 31k 21 105 126 tim shepherd songsWebOct 9, 2013 · 1 Answer Sorted by: 2 If you can keep all the keys in a List then you can just choose a random number between 0 and List.Count. Index into the list using that … part of the nitrogen cycleWebNov 29, 2024 · Dictionary options = new Dictionary (); options.Add ("YourKey", def ["YourKey"]); // Correct Answer Random r = new Random (); while (options.Count OptionsList = options.Select (e=> e.Value).ToList (); // Shuffle OptionsList … tim sheppard forever