Yahoo Web Search

Search results

1. Top results related to eight function of dictionary in c# class

   • C# - dictionary - How to get max of specific class value in dictionary?

     Top Answer

     Answered Aug 11, 2020 · 5 votes

     To get LineInfo with maximum lineDistance you can use Values collection. Since there is no MaxBy in standard LINQ you can achieve similar effect with Aggregate

     :

     var max = lines.Values .Aggregate((acc, curr) => acc.lineDistance > curr.lineDistance ? acc: curr);-

     Check all answers on Stack Overflow

     1/5

   • In C#, how do you output the contents of a Dictionary class?

     Top Answer

     Answered Aug 23, 2012 · 3 votes

     Here's an example from http://www.dotnetperls.com/dictionary

     using System;using System.Collections.Generic;-class Program{ static void Main() { // Example Dictionary again Dictionary<string, int> d = new Dictionary<string, int>() { {"cat", 2}, {"dog", 1}, {"llama", 0}, {"iguana", -1} }; // Loop over pairs with foreach foreach (KeyValuePair<string, int> pair in d) { Console.WriteLine("{0}, {1}", pair.Key, pair.Value); } // Use var keyword to enumerate dictionary foreach (var pair in d) { Console.WriteLine("{0}, {1}", pair.Key, pair.Value); } }}

     The last loop uses var to declare the KeyValuePair object. It's easier this way, since you don't have to worry about declaring the types used in the Dictionary, and produces the same result to the CLR.

     Check all answers on Stack Overflow

     2/5

   • Dictionary Of Dictionaries in C#

     Top Answer

     Answered Dec 08, 2016 · 8 votes

     You can fill the dictionary directly in your loop

     private Dictionary<string, Dictionary<string, Dictionary<string, string>>> zooDict = new Dictionary<string, Dictionary<string, Dictionary<string, string>>>();-while (reader.Read()){ var location = reader.GetString(0).Trim(); var animal= reader.GetString(1).Trim(); var Monday= reader.GetValue(1).ToString().Trim(); var Tuesday= reader.GetValue(3).ToString().Trim(); if(!zooDict.ContainsKey(location)) zooDict[location] = new Dictionary<string, Dictionary<string, string>>(); zooDict[location][animal] = new Dictionary<string, string>() { { "MN", Monday }, { "Tu", Tuesday } };}

     As a side note, you might want to consider creating classes to represent your objects, add them to a dictionary or list, and use Newtonsoft Json.net (http://www.newtonsoft.com/json) to serialize them instead of using dictionaries for everything. For example, you can create a class:

     public class Animal{ public string Name { get; set; } public int Monday { get; set; } public int Tuesday { get; set; }}var zooDict = new Dictionary<string, List<Animal>>();// then in your while loop you do this if(!zooDict.ContainsKey(location)) zooDict[location] = new List<Animal>();zooDict[location].Add(new Animal() { /* fill Monday and Tuesday properties */ });

     Of course, you can take this one step further and create a class with properties string Location and List<Animal> Animals, and eliminate dictionaries altogether. It depends on your use case(s) I guess

     Check all answers on Stack Overflow

     3/5

   • c# Lookup for a value in Dictionary of Dictionary

     Top Answer

     Answered Jul 12, 2011 · 4 votes

     you could just have a separate lookup for users:

     Dictionary<string, InfoObject> userLookup;-

     This only of course if you want to optimize for lookup speed, the downside is that addition and removal you have to do now on two separate data structures which have to keep in sync.

     Check all answers on Stack Overflow

     4/5

   • Class declared inside of another class in C#

     Top Answer

     Answered Mar 27, 2009 · 61 votes

     You create an inner class because it is only ever used within the scope of class x and it logically fits in the factoring/architecture of class x.

     Class y might also be privy to implementation details of class x that are not meant to be known to the public.

     Other Answers

     Answered Mar 26, 2009 · 20 votes

     This has permissions implications. A top-level "class y" would be "internal" - however, here "y" is private to "x". This approach is helpful for implementation details (for example cache rows etc). Likewise, y has access to all private state of x.

     There are also implications with generics; x<T>.y is generic "of T", inherited from the outer class. You can see this here, where Bar has full use of T - and note that any static fields of Bar are scoped per-T.

     class Foo<T> { void Test(T value) { Bar bar = new Bar(); bar.Value = value; } class Bar { public T Value { get; set; } }}

     Often people incorrectly think they need to define Bar as Bar<T> - this is now (effectively) doubly generic - i.e. Foo<TOld, T> - where TOld is the (now unavailable) T from Foo<T>. So don't do that! Or if you want it to be doubly-generic, pick different names. Fortunately, the compiler warns you about this...

     Other Answers

     Answered Mar 26, 2009 · 7 votes

     This code is fine for the exact reason that you have given - "class y is only ever used inside of class x". Those are nested types and one of the guidelines for using them is that nested types should be tightly coupled to their declaring type and must not be useful as a general purpose type. That way the nested class is inacessible to other classes, but still allows you to follow object oriented principles.

     Check all answers on Stack Overflow

     5/5

   Show moreShow less

2. stackoverflow.com › questions › 8091000How to access Dictionary from other Class's function in C#?

   stackoverflow.com › questions › 8091000

   • Cached

   Nov 11, 2011 · You can declare Dictionary<string, string> d as a member variable of your class , and initialize this object in the class constructor.You can have a getter method to get the dictionary in other classes. public class EngDictionary { Dictionary<string, string> dictionary; public void EngDictionary() { dictionary = new Dictionary<string, string ...

   Code sample

   private Dictionary<string, string> dict;

   public SomeDictionary { get dict; set dict = value; }

   public Dict() {

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

     dict.Add("Classifieds", "Kleinanzeigen");...

   See more on stackoverflow

3. www.geeksforgeeks.org › c-sharp-dictionary-classC# | Dictionary Class - GeeksforGeeks

   www.geeksforgeeks.org › c-sharp-dictionary-class

   • Cached

   Sep 1, 2021 · The Dictionary<TKey, TValue> Class in C# is a collection of Keys and Values. It is a generic collection class in the System.Collections.Generic namespace. The Dictionary <TKey, TValue> generic class provides a mapping from a set of keys to a set of values. Each addition to the dictionary consists of a value and its associated key.

4. People also ask

   How to use dictionaries in C#?

   • In the same way, a C# dictionary has a collection of keys and values, where the key is the word, and the value is its meaning. Dictionaries are defined in the System.Collections.Generic namespace, so before we can use them, we must specify the namespace at the top of the document. Now dictionaries will be available to use for use.

   C# Dictionary Generic Collection Tutorial | KoderHQ

   www.koderhq.com/tutorial/csharp/dictionary/

   See all results for this question

   What is a dictionary in C#?

   • Dictionaries in C# are collections of keys, values, and a well-used class. I’ll show you the class’s basics in this tutorial with examples. I’ll explain what a dictionary is, what it’s used for, and how we use them. What Are Dictionaries In C#? It’s basically a list but with a key and a value. In a list you only have values.

   Using dictionaries in C# with examples - Tutorial - Kens Learning Curve

   kenslearningcurve.com/tutorials/using-dictionaries-in-c/

   See all results for this question

   How to create a dictionary in C#?

   • It is recommended to keep the key simple, like a GUID or an integer. Dictionaries in C# also have known methods like Add () , Remove (), and Clear (). It also has methods specifically for a dictionary. To sum it up: It has a key, which cannot be NULL and needs to be unique. it has a value, which can be NULL and can be duplicated.

   Using dictionaries in C# with examples - Tutorial - Kens Learning Curve

   kenslearningcurve.com/tutorials/using-dictionaries-in-c/

   See all results for this question

   How do I get a dictionary in Java?

   • In your main class. EngDictionary dict = new EngDictionary (); Dictionary dictionary = dict.Dict (); You can declare Dictionary d as a member variable of your class , and initialize this object in the class constructor.You can have a getter method to get the dictionary in other classes.

   How to access Dictionary from other Class's function in C#?

   stackoverflow.com/questions/8091000/how-to-access-dictionary-from-other-classs-function-in-c

   See all results for this question

5. kenslearningcurve.com › tutorials › usingUsing dictionaries in C# with examples - Tutorial

   kenslearningcurve.com › tutorials › using

   • Cached

   Dec 30, 2022 · Conclusion On Dictionaries In C#. Although this is a short article, it does show the impact a dictionary can have on your code. There are many scenarios where you want to use a dictionary (or not). In some scenarios, a List<T> would be better, but when you want to keep your items unique, you need some sort of a key. A dictionary offers just ...

6. zetcode.com › csharp › dictionaryC# Dictionary - working with a Dictionary collection in C#

   zetcode.com › csharp › dictionary

   • Cached

   • C# Dictionary
   • C# Dictionary Initializers
   • C# Dictionary Count Elements
   • C# Dictionary Add, Remove Elements
   • C# Dictionary Containskey and Containsvalue Methods
   • C# Traverse Dictionary
   • C# Sort Dictionary
   • C# SortedDictionary
   • C# Dictionary of Lists
   • Source

   A dictionary, also called an associative array, is a collection of unique keysand a collection of values, where each key is associated with one value.Retrieving and adding values is very fast. Dictionaries take more memory becausefor each value there is also a key.

   See full list on zetcode.com

   C# dictionaries can be initialized with literal notation. The elementsare added on the right side of the assignment inside {}brackets. In the example, we create two dictionaries using literal notation. A new dictionary is created. Between the angle brackets <>,we specify the data type of the keys and values. New pairs of key/valueelements are writt...

   See full list on zetcode.com

   With the Countproperty, we get the number of keys in thedictionary. The example counts the number of items in the dictionary. Here we print the number of items in the dictionary.

   See full list on zetcode.com

   After the dictionary has been created, new elements can be added or removed fromthe dictionary. The example creates a new dictionary and modifies it using several built-inmethods. A new dictionary is created. The user names are the keys and the user ages arethe values. We add two new pairs to the dictionary using dictionary access notation and theA...

   See full list on zetcode.com

   The ContainsKey method determines whether the dictionarycontains the specified key and the ContainsValuemethod determines whether the dictionary contains the specified value. In the example, we check if the "sk" key and "Slovakia"value are present in the dictionary.

   See full list on zetcode.com

   There are several ways to travers a C# dictionary. The example loops over a dictionary using foreach. In this foreach loop, we go through the dictionary by pairs. Each pair isdecomposed into its key and value. In this case, we access the keys and values by their Keyand Valueproperties. Finally, this is an older way of traversing a dictionary by pai...

   See full list on zetcode.com

   We can use LINQ to sort dicionaries. The example sorts the dictionary by user ages. The OrderBymethod is used to sort the entries by their values.

   See full list on zetcode.com

   SortedDictionaryrepresents a collection of key/value pairsthat are sorted on the key. The example demonstrates the usage of the SortedDictionary.

   See full list on zetcode.com

   In the following example, we have a dictionary of lists. We add three lists of integers into a dictionary. We compute a sum for each nested list and a final total sum.

   See full list on zetcode.com

   Dictionary class - language reference In this article we have worked with a C# Dictionary collection.

   See full list on zetcode.com

7. dev.to › jlewis92 › a-quick-tour-of-dictionaries-inA quick tour of dictionaries in C# - DEV Community

   dev.to › jlewis92 › a-quick-tour-of-dictionaries-in

   • Cached

   Apr 21, 2023 · Dictionaries in C# are one of the more useful data structures you can use to store and retrieve data quickly and most programming languages have some form of dictionary built into them. However, there are a lot more versions of dictionary in C# and I haven't an article bringing them all together to discuss where you'd use one over the other, so ...

8. www.koderhq.com › tutorial › csharpC# Dictionary Generic Collection Tutorial | KoderHQ

   www.koderhq.com › tutorial › csharp

   • Cached

   C# Dictionary Generic Collection Tutorial. In this tutorial we learn about a complex data container in C# that stores elements by key/value pairing, called dictionaries. We cover how to define and initialize a dictionary, access and modify dictionary elements with the indexer or loops, remove elements as well as how to check if an item exists ...

9. www.gyata.ai › c-sharp › c-sharp-dictionaryMastering C# Dictionary: A Comprehensive Guide

   www.gyata.ai › c-sharp › c-sharp-dictionary

   • Cached

   Dec 8, 2023 · Understanding C# Dictionary; Dictionary in C# is a collection of keys and values. In a dictionary, the keys are unique. This means that there can be no two elements with the same key. Dictionary in C# can be seen as a hash table or a hash map. It uses the key to access the element in the map. In C#, a Dictionary is defined in the System ...