Map in C++ with practical examples - step by step Data Structures tutorial

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  • Опубликовано: 31 янв 2025

Комментарии • 239

  • @CodeBeauty
    @CodeBeauty  3 года назад +22

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  • @ILGiullareDiCorte
    @ILGiullareDiCorte 3 года назад +49

    I want to add a note. std::map is implemented like a red-black tree (a type of balanced tree, that's why the "map" is sorted). This means that insert, search and remove are O(log(n)).
    std::unordered_map is implemented like a hash table (with buckets) and insert, search and remove are amortized O(1). So choose well, because the 2 data structures are really different and have huge difference in performance. Btw great video and thanks for sharing your knowledge to people that are learning c++ ^^

  • @kishensharma5651
    @kishensharma5651 3 года назад +32

    This was a very concise implementation of maps in C++, thank you again for creating the tutorials that you do

    • @CodeBeauty
      @CodeBeauty  3 года назад +3

      You are welcome! ☺️🥰

  • @brandonblackwell1216
    @brandonblackwell1216 3 года назад +8

    Finally a map video from you ! Ive been waiting for this !

  • @あい-ueo
    @あい-ueo 9 месяцев назад +4

    I was confused by my professor's explanation and videos in RUclips but eventually found out this one to be very straightforward and easy to learn, thanks a lot!!

  • @yuhuili6738
    @yuhuili6738 2 года назад +6

    I gotta say this! When I learned about OOP, I subscribed to this channel and RIGHT NOW! My professor just put the link of this video in this weekreading schedule! Amazing. Thank you so much for the explanation!!!

    • @CodeBeauty
      @CodeBeauty  2 года назад +7

      Your professor is awesome, he really cares about teaching, give him my greetings! 🥰
      Most of my professors would just give us a book with a bunch of abstract examples and students had to figure it out on our own. It took 5x more time 🥲

  • @ethangold4900
    @ethangold4900 3 года назад +9

    15:55, yes I confirm that scary face is an attack, an attack that is supposed to scare the opponent with a scary face, this will lower the opponent's speed stat in battle

    • @CodeBeauty
      @CodeBeauty  3 года назад +2

      Thank you for clarifying this! 😁🔥🔥
      I also did some research and after seeing Charmander's scary face myself, I was stunned and terrified! 😁
      I hereby testify that everything stated in the video and in this comment is correct! 😏😁

  • @diwasbajracharya3745
    @diwasbajracharya3745 3 года назад +6

    Its surprising that I was just searching for maps and here we are!!!BTW done with both yours and caleb's 10hr c++.Thanks to you, its becoming easier than I expected.

    • @CodeBeauty
      @CodeBeauty  3 года назад +2

      I'm happy to hear that! ❤️🤗

  • @amrrasslan4329
    @amrrasslan4329 Год назад +1

    you made a long story short . thank you for being to the point without a long introduction hats off to you :)

  • @aruneshsingh5698
    @aruneshsingh5698 2 года назад +4

    The way you explain these topics is very fascinating. Please make videos on heaps , hashing and other data structures

  • @luisalamo2658
    @luisalamo2658 2 года назад

    Thank you for creating this Playlist. My fear of C++ disappeared! I bought to you a coffee but I forgot to write a message to you on that platform. Keep doing gorgeous work here, I have been a Java developer for years and I'm so happy to relearn the fundamentals or new things in other languages through this kind of tutorial on YT.

  • @sabrinanastasi5809
    @sabrinanastasi5809 2 года назад

    You seem so happy sharing your knowledge on your videos. As a woman myself that motivates me to keep going on the coding journey. I struggled with maps and your video helped a lot. Thank you!

  • @palmtrees9474
    @palmtrees9474 3 года назад +1

    Hvala na videu! Prelepa si Saldina! Respekt! Pozdrav iz Srbije!

  • @gobybike5016
    @gobybike5016 3 года назад +2

    I wrote my own map facilities about 12 years ago before I knew STL has map. I could’ve saved a lot of time if I knew about the built in map features. I learned a few things from your video. Thanks.

  • @ajitpatil6532
    @ajitpatil6532 2 года назад +2

    I love how this video is on point and precise. Your C++ vids are great.

  • @rohitcr2k
    @rohitcr2k 3 года назад +2

    Your channel is a treasure for (budding) programmers. 💜

  • @bernardseno2535
    @bernardseno2535 3 года назад +1

    Great! I have been looking for a great tutorial about map and there you are Ma'am! Thank you!

  • @muhanadglb8881
    @muhanadglb8881 3 года назад +2

    You are my hero in C++ .......👍👍👍👍👍

    • @CodeBeauty
      @CodeBeauty  3 года назад

      ☺️🥰🥰

    • @muhanadglb8881
      @muhanadglb8881 3 года назад

      keep going in these videos. ..... it's really useful .

  • @mitchong8753
    @mitchong8753 Год назад

    Thank You! Your videos on C++ are helping me pass an online college course. I am at the final project, and needed to know if C++ had anything like a dictionary in Python.

  • @marzie5867
    @marzie5867 3 года назад

    You're the best teacher ever
    First l saw one of your videos l had no ldea about computer
    But now l can write my own program
    I love you 😍 💗

    • @CodeBeauty
      @CodeBeauty  3 года назад

      I'm so happy to hear that! 🥰

  • @altheahicks9574
    @altheahicks9574 2 года назад

    you always explain the minutiae of these topics really clearly and you have a good sense of which points to emphasize for a beginner. I always come to your channel when I don't quite understand a topic in c++. thanks so much!

  • @neepunpatil5201
    @neepunpatil5201 3 года назад +1

    Finallly Completed your OOP C++ course

  • @SivasaiPrime
    @SivasaiPrime 3 года назад +3

    Wow...I loved it....taking examples of pokemons and their attacks..is awesome...brings my childhood memories ❤️❤️❤️

  • @ashishgusain9494
    @ashishgusain9494 2 года назад +1

    Best video i have ever watch for string example.

  • @amodpatwa1822
    @amodpatwa1822 3 года назад +2

    You are amazing Saldina, this video was very nice. I prefer mostly unordered map over ordered map.
    And don't feel awkward about your favourite pokemon if you are 26, I'm 27 and my favourite pokemon is Pikachu ❤️ because he is very cute and sometimes very aggressive if he don't like anything

  • @canhobby6286
    @canhobby6286 2 года назад

    I was looking for C++ associative arrays like in PHP, and you showed me how - AND, many thanks for the black background from you blind Canadian subscriber..

  • @abdourahamanediallo8877
    @abdourahamanediallo8877 3 года назад +2

    I watch your videos and enjoy them very much. please can you make a video of a C++ programming project which covers all or almost all the themes of the C++ language

    • @CodeBeauty
      @CodeBeauty  3 года назад

      Thank you, I will! ☺️🤗

  • @victoradeola3807
    @victoradeola3807 2 года назад +1

    you are the Best. No one else comes close

    • @CodeBeauty
      @CodeBeauty  2 года назад

      Thank you so much, you are very kind person 🥰

  • @thebadluckraven8217
    @thebadluckraven8217 3 года назад

    I love all your videos and now i can comprehend what im doing much better than any of the books ive read. If you could make a video on Vectors i would greatly appreciate it ! Thank you for everything you do!

  • @kamertonaudiophileplayer847
    @kamertonaudiophileplayer847 3 года назад +1

    Thanksgiving? Tons of people celebrate this wonderful autumn holiday. But what if you need to finish this damn project? Right, just open the video and you will answer to the question you tried to resolve for weeks. Bravo!

  • @RoboticsWithHrithik
    @RoboticsWithHrithik 3 года назад +1

    I was searching for this video finally its here 👍

  • @shawaizhassan6253
    @shawaizhassan6253 3 года назад

    You're making coders lives easy...thanks a lot!!!

  • @christofzellhofer7504
    @christofzellhofer7504 8 месяцев назад

    Vielen Dank für deine Videos, du hast mir im Studium schon sehr geholfen! Beste Grüße aus Wien!👋
    Dein Deutsch ist sehr gut! 👌

  • @iqrajaved3593
    @iqrajaved3593 3 года назад +1

    Your videos are very helpful for us.please keep it up.. your videos also improving our English.Thank you 🥰

  • @tjunyat
    @tjunyat 2 года назад

    Loving your videos! I'm sure you have a more elegant solution, but the printing of the final comma was bugging me, so this is what I did:
    for (auto pair : pokedex) {
    cout

    • @antonmakeyenko4018
      @antonmakeyenko4018 2 года назад

      Next thing to learn: why using "auto" instead of "auto&" while iterating on a container is a bad idea (usually and in your particular case)

  • @SibiAkaManiek
    @SibiAkaManiek 3 года назад +2

    One of the most common situation is to erase element while iterating in the loop. In that case is so close to make mistake ;)

  • @truecodeface
    @truecodeface 3 года назад +1

    Thanks a lot from your clean codding , clear speaking , and you always brings each and every point from sidelines to TEXT.
    I
    💕💕💕 your Instructions always.
    but i wish to become a close colleague for you in the area of coding and programming for ever.
    so please try your best for shifting me from Afghanistan to your Homeland (Boss AND Herz).i want to work with you, i like working with you.

  • @monstergamingiraq7927
    @monstergamingiraq7927 3 года назад +1

    Finally a new video ...Thanks a lot i really appreciate your efforts❤️

  • @itx-zulqar
    @itx-zulqar 3 года назад +3

    Thanks .....10hr C++ video. very very thanks

  • @UFALAM8765
    @UFALAM8765 Месяц назад

    Mam, your programing lectures is outstanding .... thank you sooooo much mam❤
    Mam, i request you to make your lectures in C# language for beginners............ make a complete course with all concepts in C# from starting to end ........... plźzzzzzz mam that's are our humble request to you❤

  • @Hassan_Rashed
    @Hassan_Rashed 5 месяцев назад +1

    Thank You

  • @milo20060
    @milo20060 2 года назад

    I briefly remember on some random slide show in my second year uni about the maps. The teacher talked quite fast and I didn't pick it up.
    But now I kind of got it! Thanks!
    Oh and my favourite Pokemon.
    Well what first comes to my mind would be Charmander and it's final form Charizard. Used to have one as a soft toy ^^

  • @neepunpatil5201
    @neepunpatil5201 3 года назад +9

    Full DSA course ma'am please 🥺
    I understand much better when you teach

    • @remysalone
      @remysalone 2 года назад

      I beg for the same.🥺

  • @austingrapes5455
    @austingrapes5455 Год назад

    Using the pokedex example makes the lesson that much more fun.I really don't think scary face is an actual attack, I believe google is wrong, but it might be an attack in the newest versions.

  • @AudreyGB
    @AudreyGB 8 месяцев назад

    Wow, great video, I'm glad I've just found your channel!

  • @SillyCatto
    @SillyCatto 2 года назад +5

    Thanks a lot for such an easy and perfect explanations, also with interesting examples!😊
    Helps me a lot.
    We'd also love to have a video on set data structure please 🙂

  • @rushabhjain9158
    @rushabhjain9158 3 года назад +1

    QUICK , PRECISE AND EASY !

  • @subhasrini2706
    @subhasrini2706 2 года назад

    Thank you soo much because i couldn't able to figure out this MAP ans how to use the Maps correctly...Thanks a lot!!

  • @superfloyd
    @superfloyd 2 года назад +1

    tip : if the type is too complicated for readability, such as an iterator or a standard library type, then auto&& will magically bind to anything always.You can use it in for loop.

  • @cristina2516
    @cristina2516 Год назад

    u really know how to explain things, good job!

  • @fatehpreetsingh1440
    @fatehpreetsingh1440 3 года назад +3

    Thank you for this tutorial

    • @CodeBeauty
      @CodeBeauty  3 года назад +1

      You're welcome ☺️😺

  • @sivaramarajusiv7826
    @sivaramarajusiv7826 2 года назад

    Thank you Saldina, I learnt something from your videos.

  • @mmuzzammil8394
    @mmuzzammil8394 2 года назад +1

    Thank you. Video was helpful and clear!

  • @begueivan3799
    @begueivan3799 3 года назад +1

    You should explain how you set up your external terminal

  • @lightspd714
    @lightspd714 Год назад

    Great presentation style, very informative! Also, pikachu is my fav

  • @mateoslab
    @mateoslab 3 года назад +3

    i just learned about c++ containers 2 days ago so this video helps! How is a list different from a normal array? would it work to have a string array as the second data type of the map?

    • @ChrisCarlos64
      @ChrisCarlos64 3 года назад

      One of the key differences is an array is fixed size versus a list that can grow and shrink in size. List, like other std containers (vector, queue, etc) know their size and have operational functions to get items at position, front, end, iterators, and so forth. When using normal arrays you cannot know the size, unless you use std::array which has some features like std containers, however array is still fixed size.
      Maps can hold any type of data for their keys and values. If you want the second to be string array, you can do that. Just remember that your string array has to be fixed in size or if you use a container it can grow and shrink over time, so it matters on what you need. You just need to think about what use would that array be for? Because the key gives you access to the array, but now accessing the elements in your string array requires some other search (like iterating and comparing the values).

  • @baibhavvikas1767
    @baibhavvikas1767 2 года назад

    thank you for teaching it all in such a simple way .

  • @diegocamposjimenez666
    @diegocamposjimenez666 2 года назад

    I'm 30 and still play sometime. Sceptile and Bulbasaur. When I stopped playing at 16:19 I was doing the same laugh. Also, could you add one more video about linked lists of a linked list? Two dimensional list for dictionaries where if user adds "car" it adds it in the other lists from A to Z and sort it. If I remember where this comment is, I'll add my code as well.

  • @yairfink2368
    @yairfink2368 3 года назад +1

    thanks for all your videos, really like this program.

    • @CodeBeauty
      @CodeBeauty  3 года назад

      You're welcome ☺️🤗

  • @SouravChakraborty-y3w
    @SouravChakraborty-y3w Месяц назад

    Thank you for this information related to STL Map.

  • @aswin6261
    @aswin6261 2 года назад +1

    thank u sister

  • @EloquentMoves
    @EloquentMoves 2 месяца назад

    a cleaner way of inserting a string inside a value that is a vector of string values is like this, for example: pokedex[ "Pikachu" ].push_back( "thunder shock", "tail whip", "quick attack" );

  • @prigithjoseph7018
    @prigithjoseph7018 3 года назад +1

    Hello do you have any plan for converting all your videos into book?
    You have created amazing videos friend.

  • @software2171
    @software2171 3 года назад +3

    #include
    #include
    #include
    using namespace std;
    /*
    After Reading 'MAP in C++', thought about Google Map in C++..finally
    understand, could not search codebeauty location in this map.. :D
    */
    void fruits(){
    map dic;
    dic.insert(pair("1 kg apple", "die fruits "));
    dic.insert(pair("11 kg orange", "living fruits"));
    dic.insert(pair("7 kg berry", "newborn fruits"));
    dic.insert(pair("6 kg banna", "unborn fruits"));
    for (auto p : dic)
    cout

  • @Sssilence3
    @Sssilence3 3 года назад +1

    Always love ❤❤❤ your videos..
    Please make a video of “bit manipulation”... 🙏🙏
    I see lots of video of bit manipulation, but can't understand properly. 🙁🙁
    So please please one video of bit manipulation.

  • @drsumankhanal
    @drsumankhanal Год назад

    You teach so cool. Easy to follow? Can you make one on AVL and RB trees? How to create AVL trees, traverse?

  • @RohitKumar-np1vb
    @RohitKumar-np1vb 3 года назад

    Love the content you upload🔥🔥
    I have been trying to grasp tree from a long time plzz make vedio's regarding trees.
    Love from INDIA

  • @nicholaskomsa1777
    @nicholaskomsa1777 9 месяцев назад

    Thank you for your interest in the topic of Modern C++. However, your code is depreciated. Learn to do:
    std::map myDictionary = {
    {"name", "John"},
    {"surname", "Doe"},
    {"age", "25"}
    };
    for (auto& [id, value] : myDictionary)
    std::cout

  • @JMac___
    @JMac___ 9 месяцев назад

    u should discuss the underlying structure of the map and its implementation as well.

  • @dp0813
    @dp0813 2 года назад +1

    Truly helpful! Danke!

  • @notionmakeit2888
    @notionmakeit2888 2 года назад

    this is the best video for map

  • @Cesar33-pl
    @Cesar33-pl 3 года назад +1

    Very useful video, thank you!

  • @sheetalkhatri8106
    @sheetalkhatri8106 Год назад

    Wow, you made it so interesting, great video

  • @itx-zulqar
    @itx-zulqar 3 года назад +2

    Thanks

  • @diegoi1313
    @diegoi1313 Год назад

    Loved your Pokédex Pikachu example!

  • @fayehill1225
    @fayehill1225 2 года назад

    Thank you, really great video!

  • @pavankumarnitta0329
    @pavankumarnitta0329 3 года назад

    Can you please post a full detailed long video on below two topics:
    Data structures using C++
    STL using C++

  • @luisfernando3405
    @luisfernando3405 2 года назад

    Is very good video to learn about this topic; Good job, 🎯

  • @connormckenna2396
    @connormckenna2396 2 года назад

    This is a great video that's easily understood. However, I wish they would have explained the auto function within the for loop.

    • @CodeBeauty
      @CodeBeauty  2 года назад

      Watch this video ruclips.net/video/VNb3VLIu1PA/видео.html
      here I also use "auto" and there is an explanation for it

  • @kalidasbenny811
    @kalidasbenny811 Год назад

    thanks a lot you are a life saver

  • @alperenerdogan4602
    @alperenerdogan4602 2 года назад

    simple and nice explanation 👍

  • @mulumbacephas5036
    @mulumbacephas5036 3 года назад +1

    I was searching for copper and i ended up find gold nice vid

  • @maheshvelugula8418
    @maheshvelugula8418 2 года назад +1

    I watch daily pokemon series videos, the way you explain and the example taken is very good, nice, thank you. 🥰😉

  • @Only-zeus
    @Only-zeus 3 года назад +1

    Hey please upload tutorial play list about web development using C++

  • @MystoCalypto
    @MystoCalypto Год назад +1

    your german pronunciation is so good

  • @alsanabe5241
    @alsanabe5241 11 месяцев назад

    Thank you for the clarification.

  • @TheTubeDanny
    @TheTubeDanny 3 года назад

    A nice tutorial, you're explaining very detailed for beginners. i stumbled across by coincidence. just confused/curious why you chose german translations for the fruits since your slang doesnt really sound german - merry x-mas 🌲

  • @mustafaalhumairi4383
    @mustafaalhumairi4383 2 месяца назад

    Basically taught me two languages simultaneously, German and C++

  • @sawomirbartoszko9385
    @sawomirbartoszko9385 2 года назад

    interesting understandable consise without beating around the bush excellent

  • @artemioharoldperlaciosluqu5471
    @artemioharoldperlaciosluqu5471 3 года назад +1

    Me encantan tus videos, muchas gracias :D

  • @nde810
    @nde810 Год назад

    This was a very clear explanation of the map concept, thank you for the hard work.
    PS : my favorite pokemon are Amphinobie, Pikachu, and Lukario :)

  • @sarahalahmad9496
    @sarahalahmad9496 2 года назад +1

    💕💕💕💕 thanks a lot !

  • @Shad0wBenny
    @Shad0wBenny 3 года назад +3

    I love hearing you speak other languages. You should speak in your native language more often. I'll be in awe if you start speaking Latin. 🤩

  • @mohammadasaad885
    @mohammadasaad885 2 года назад

    what do u think about problem solving ?! how can we learn it ?
    thx so much for ur videos .

  • @j.rayscott4681
    @j.rayscott4681 3 года назад +1

    Great video as always! I have a question. Since the declaration of map includes, in your example, string and string why when you do the insert do you have to say string and string again??

    • @TheHatMusic
      @TheHatMusic 3 года назад

      If you have a map which uses string as the key and string as the value, the map is able to store objects, and those objects must be a pair containing two strings (pair).
      When you create that pair, you need to define what data it stores, so by passing string and string to pair when it is created, you specify its type just as you do when creating the map, and as the types stored by the pair match the types accepted by the map, the insert operation will succeed.
      If you don't want to explicitly create a pair then add it, you can call emplace on the map and pass in the strings, and c++ will create the pair for you -ie. myDictionary.emplace("banana", "die Banane");

  • @SA-oj3bo
    @SA-oj3bo 3 года назад +1

    How to make an API request with C++ and handle the JSON response? Is there an alternative for JS parse and stringify or Python Loads en Dumps?

  • @Frammqooh1234
    @Frammqooh1234 3 года назад

    Thank you for another video !!!!

  • @program5004
    @program5004 3 года назад +1

    welldone dear saldina😍😍.......i have an order could you solve this question for me...?write a c++ program that calculate the number of (day)s between two date using class??

  • @siddharthqs
    @siddharthqs 6 месяцев назад

    You must not use [ ] operator to access the elements in maps. It has lot of issues.

  • @khors3075
    @khors3075 3 года назад +1

    Hvala.