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1. Top results related to eight function of dictionary in c# 5 example

   • 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

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   • 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.

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     2/5

   • Example of array.map() in C#?

     Top Answer

     Answered May 20, 2020 · 189 votes

     This is called projection which is called Select in LINQ. That does not return a new array (like how JavaScript's .map does), but an IEnumerable<T>. You can convert it to an array with .ToArray.

     using System.Linq; // Make 'Select' extension available...var ages = people.Select(person => person.Age).ToArray();

     Select works with all IEnumerable<T> which arrays implement. You just need .NET 3.5 and a using System.Linq; statement.

     For your 2nd example use something like this. Notice there are no arrays in use - only sequences.

     var items = Enumerable.Range(1, 4).Select(num => string.Format("{0}a", num));-

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     3/5

   • Example of MPXJ library in C#

     Top Answer

     Answered Dec 16, 2010 · 5 votes

     hopefully this will help.

     First you need to open your project file:

     ProjectReader reader = ProjectReaderUtility.getProjectReader(inputFile);ProjectFile projectFile = reader.read(inputFile);-

     This assumes that you have a file name in the inputFile string.

     The method below should be treated as pseudocode (i.e. I haven't compiled it, shaken the bugs out of it and so on, and it's not the most elegant thing I've ever written), but it illustrates the approach:

     public void dumpTables(ProjectFile file){ List tables = file.getTables(); Iterator iter = tables.iterator(); while (iter.hasNext()) { Table table = (Table)iter.next(); if (table.getResourceFlag()) { List resources = file.getAllResources(); Iterator resourceIter = resources.iterator(); while (resourceIter.hasNext()) { Resource resource = (Resource)iter.next(); List columns = table.getColumns(); Iterator columnIter = columns.iterator(); while (columnIter.hasNext()) { Column column = (Column)columnIter.next(); Object columnValue = resource.getCachedValue(column.getFieldType()); Console.Write(columnValue); Console.Write(","); } Console.WriteLine(); } } else { List tasks = file.getAllTasks(); // etc. as above } }}

     The idea is that you are retrieving the list of tables present in the file, and for each one working out if it is a Task or Resource table. Based on this you'll grab the list of tasks or resources, iterate through that, and for each instance pull out the column value and display it. Note that I've not made any attempt to order the tasks or resources in any particular way. I'll leave that as an exercise for the reader!

     Hope that helps!

     Jon

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     4/5

   • Example of Mod 256 checksum in C#

     Top Answer

     Answered Sep 30, 2016 · 3 votes

     Maybe this is enough for you. Mod 256 is automatically implied if you use a byte as checksum.

     string s = "hello world"; byte[] data = Encoding.ASCII.GetBytes(s); byte check = 0; for (int i = 0; i < data.Length; i++) { check += data[i]; }

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     5/5

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2. stackoverflow.com › questions › 4233536C# Store functions in a Dictionary - Stack Overflow

   stackoverflow.com › questions › 4233536

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   Like this: Dictionary<int, Func<string, bool>>. This allows you to store functions that take a string parameter and return boolean. dico[5] = foo => foo == "Bar"; Or if the function is not anonymous: dico[5] = Foo; where Foo is defined like this: public bool Foo(string bar) {.

   Code sample

   private object function2(object arg1) { return null; }

   private object function3(object arg1, object arg3) { return null; }

   Dictionary<string, Func<State, object>> functions;

   public Interceptor() {

     functions = new Dictionary<string, Func<State, object>>();...

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

   kenslearningcurve.com › tutorials › using

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   Dec 30, 2022 · 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.

4. People also ask

   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/

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   What types of values can be used in a dictionary object?

   • The values can also be of any type, with a few examples to follow. Here is a simple dictionary object that uses a string as a key and a string as its value. public static void Main() Dictionary< string, string > bigRedBook = new Dictionary< string, string >(); //use the Add method to add items to the dictionary

   C# Dictionary: Definition, Examples, Best Practices, and Pitfalls - SubMain

   blog.submain.com/c-dictionary-examples-practices-pitfalls/

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   How to create a dictionary from a list or array in C#?

   • To create a dictionary from a list or array in C#, you can use the ToDictionary method from the System.Linq namespace. This method takes a sequence of elements and a function that specifies how to create the key and value for each element. Here's an example of creating a dictionary from a list of strings:

   C# Dictionary: Complete Guide [2023] - Josip Miskovic

   josipmisko.com/posts/c-sharp-dictionary

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   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/

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5. blog.submain.com › c-dictionary-examples-practicesC# Dictionary: Definition, Examples, Best Practices, and Pitfalls

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   • C# Dictionary: It Is What?You Think it?Is
   • Just Another Data Structure?
   • C# Dictionary Methods & Properties
   • Wrapping Up

   Most of?us are familiar with the concept of a dictionary, probably. If you want to know the definition of a word, you pull out your dictionary (a large book with words and definitions in it), look up the word alphabetically, and viola, there is the definition and proper spelling of the word! The same holds true for a thesaurus, encyclopedia, and th...

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   So, hopefully, we’re starting to understand what a dictionary is. But why would I use it? Is this just another data structure at my disposal? This is solid thinking on your part!? Implementing these data structures into a language is not a trivial decision. Think about all of the work and man hours that went into creating this new type that all of ...

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   We’ve spent some time now building a few dictionaries (using the Addmethod), and we have also spent time discussing some use cases.? Now we’ll take a look under the covers at some of the methods and properties that the dictionary provides.

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   Lookups, lookups, lookups.? We now know the design intentions of the C# dictionary. We looked at why it’s useful over other data structures, and we examined its properties and methods. The interwebs are full of great articles and discussions about dictionaries, so I encourage you to keep learning more.? Try the samples above, extend them, and keep ...

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6. josipmisko.com › posts › c-sharp-dictionaryC# Dictionary: Complete Guide [2023] – Josip Miskovic

   josipmisko.com › posts › c-sharp-dictionary

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   Jan 26, 2023 · To create a dictionary from a list or array in C#, you can use the ToDictionary method from the System.Linq namespace. This method takes a sequence of elements and a function that specifies how to create the key and value for each element. Here's an example of creating a dictionary from a list of strings:

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7. amarozka.dev › dictionary-data-structure-in-csharpEfficient Data Management with Dictionary in C# - .Net Code ...

   amarozka.dev › dictionary-data-structure-in-csharp

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   Aug 16, 2023 · Usage Examples: 1. Creating a Dictionary: Dictionary<string, int> ageDictionary = new Dictionary<string, int>(); In this example, a new dictionary named ` ageDictionary ` is created to store pairs where keys are strings (representing names) and values are integers (representing ages). 2. Adding and Retrieving Elements:

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

   zetcode.com › csharp › dictionary

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   Jul 5, 2023 · C# Dictionary tutorial shows how to work with a Dictionary collection in C#. A dictionary, also called an associative array, is a collection of unique keys and a collection of values, where each key is associated with one value. Retrieving and adding values is very fast. Dictionaries take more memory because for each value there is also a key.

9. 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

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   Apr 21, 2023 · Put simply, a dictionary is a list of key-value pairs. It's mainly used when you need to store large or complex objects within the code while also optimizing for quick retrieval of data. It does this by allowing you to pull out a key (which has to be unique) that is linked to the larger object (the value).