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1. Top results related to major features of dictionary in c

   • 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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     1/5

   • Features and Use of Pointers in C/C++

     Pointers store the address of variables or a memory location. 

     Syntax:

     datatype *var_name;

     Example: pointer “ptr” holds the address of an integer variable or holds the address of memory whose value(s) can be accessed as integer values through “ptr”

     int *ptr;

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     Features of Pointers:

     • Pointers save memory space.
     • Execution time with pointers is faster because data are manipulated with the address, that is, direct access to memory location.
     • Memory is accessed efficiently with the pointers. The pointer assigns and releases the memory as well. Hence it can be said the Memory of pointers is dynamically allocated.
     • Pointers are used with data structures. They are useful for representing two-dimensional and multi-dimensional arrays.

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     2/5

   • 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);-

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     3/5

   • C# implementation of Dictionary to count occurrences of words returns duplicate words in output

     Top Answer

     Answered Mar 30, 2011 · 9 votes

     Another way is to split on non words.

     var lyrics = "I fly with the stars in the skies I am no longer tryin' to survive I believe that life is a prize But to live doesn't mean your alive Don't worry bout me and who I fire I get what I desire, It's my empire And yes I call the shots".ToLower();var contents = Regex.Split(lyrics, @"[^\w'+]");-

     Also here's an alternative (and probably more obscure) loop

     int value;foreach (var word in contents){ dict[word] = dict.TryGetValue(word, out value) ? ++value : 1; }dict.Remove("");

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     4/5

   • C# - Searching keys of dictionary vs searching values in List

     Top Answer

     Answered Jan 28, 2014 · 9 votes

     If by "better" you mean "faster" then use a dictionary. Dictionary keys are organized by hash codes so lookups are significantly faster that list searches with more than just a few items in the ocllection.

     With a good hashing algorithm, Dictionary searches can be close to O(1), meaning the search time is independent of the size of the dictionary. Lists, on the other hand, are O(n), meaning that the time is (on average) proportional to the size of the list.

     If you just have key items (not mapping keys to values) you might also try a HashSet

     . It has the benefit of O(1) lookups without the overhead of the Value side of a dictionary.

     (Granted the overhead is probably minimal, but why have it if you don't need it?)

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     5/5

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2. stackoverflow.com › questions › 4384359data structures - Quick Way to Implement Dictionary in C ...

   stackoverflow.com › questions › 4384359

   • Cached

   Section 6.6 of The C Programming Language presents a simple dictionary (hashtable) data structure. I don't think a useful dictionary implementation could get any simpler than this. For your convenience, I reproduce the code here.

   Code sample

   struct nlist {

     struct nlist *next;

     char *name;

     char *defn;

   };...

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3. www.geeksforgeeks.org › implementation-on-map-orImplementation on Map or Dictionary Data Structure in C

   www.geeksforgeeks.org › implementation-on-map-or

   • Cached

   Mar 27, 2023 · C programming language does not provide any direct implementation of Map or Dictionary Data structure. However, it doesn’t mean we cannot implement one. In C, a simple way to implement a map is to use arrays and store the key-value pairs as elements of the array .

4. People also ask

   Does C have a dictionary?

   • O.o C does not have a built-in dictionary type. You have to use a third-party library. Indexing an array with an integer is a simple mathematical multiplication/addition, which usually corresponds to one or two assembly instructions. Remember, this is what C is good at: very low-level, low-overhead code.

   Structures and dictionary in C - Stack Overflow

   stackoverflow.com/questions/24053061/structures-and-dictionary-in-c

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   Can I create a dictionary in C?

   • You can create anything you want in C. You just won't have native language support for most of it. You can create a dictionary in C, but there is no dictionary built in to the standard C library. A quick search on Google code shows that there are open-source (and generously licensed) C dictionary implementations here and here.

   Do dictionaries exist in C? - Stack Overflow

   stackoverflow.com/questions/9405303/do-dictionaries-exist-in-c

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   What is a dictionary data structure?

   • The dictionary data structure is widely used in the field of programming (Refer to the section Usage of the dictionary data structure in different programming languages for detailed discussion).

   Dictionary in Data Structure | Scaler Topics

   www.scaler.com/topics/dictionary-in-data-structure/

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   What is a key attribute in a dictionary data structure?

   • Since the keys are unique (no two keys can be the same in a dictionary data structure), we can easily obtain the values related to the specific key. A key attribute of the dictionary in data structure follows two rules. Let us briefly discuss them. The key attribute of the dictionary data structure must be unique and consist of a single element.

   Dictionary in Data Structure | Scaler Topics

   www.scaler.com/topics/dictionary-in-data-structure/

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5. thealgorithms.github.io › C › d1Algorithms_in_C: Dictionary

   thealgorithms.github.io › C › d1

   • Cached

   Overview about functions. c. Dictionary * create_dict (void); create_dict: is a simple constructor for creating a dictionary and setting up the member field 'number_of_elements' and prepares the inner array 'elements'. c. int add_item_label (Dictionary *,char label [],void *); add_item_label: adds item (void*) to the dictionary at given label ...

6. www.scaler.com › topics › dictionary-in-data-structureDictionary in Data Structure | Scaler Topics

   www.scaler.com › topics › dictionary-in-data-structure

   • Cached

   Oct 18, 2022 · The dictionary data structure has an attribute called the key which helps us locate the data or value in the memory. A dictionary in data structure can be compared with our regular language dictionary where a word acts like a key and its meaning(s) acts like value(s).

7. www.youtube.com › watchHow to Create a Dictionary in C - YouTube

   www.youtube.com › watch

   • Cached

   The dictionary is an unordered collection of key/value pairs, and one can be implemented in C using a binary search tree. To accomplish this, we will need to utilize concepts of object oriented...

   • Video Duration: 30 min
   • Views: 16.3K

   • Author: Eric O Meehan

8. csc.ucdavis.edu › ~chaos › coursesPart C: Dictionaries, Arrays, Functions, and Modules - UC Davis

   csc.ucdavis.edu › ~chaos › courses

   • Cached

   The most frequently used mappings, and the only kind discussed here, are dictionaries. They allow any non-mutable object to be a key. That is, a key cannot change during its lifetime. This means that lists, dictionaries, and arrays cannot be used as keys.

9. github.com › AjayMT › dictGitHub - AjayMT/dict.c: simple dictionary implementation in c

   github.com › AjayMT › dict

   • Cached

   dict.c is a simple implementation of a dictionary in C. It's basically just a linked list of key-value pairs. Here's a usage example: #include <stdio.h> #include <stdlib.h> #include "dict.h" int main ( int argc, char *argv []) { int n = 12 ; dict *my_dict = dict_new (); dict_set ( my_dict, "hello", "world" ); dict_set ( my_dict, "foo", &n );