Why Data Structures Are Important For Every Programmer?

Key Takeaways

hello my name is Krishna and welcome to my youtube channel in this video we'll discuss why data structure is very very important for each and every programmer I'm not talking with respect to data science I'm not talking with respect to web-based a developer or some kind other kind of developer right and just take talking in a generic way but I'll give you some example of data scientist also how data structures can be important because many of your subscribers are basically asking this particular question so I found planning to move towards data sent should we have good knowledge about data structures or not so before going ahead guys let me just make clear some doubts regarding this now when I talk about two topics over here one is data structure and the other one is algorithm right now many of the people whenever I talk about data structure they'll be thinking algorithm also as a part of it but just try to understand this here data structure some of the examples of data structures are arrays you know lists and you have peoples you have sets you have dictionaries you have queues you have stacks so these are the examples of data structure and why this data structure are basically used they are used for storing some data some variable some value you know and when we are using these data structures in a set of instruction such that the it helps us to execute some task very efficiently at that time we'll call that as an algorithm right so this is the basic difference between data structure and algorithm some of the algorithms that I would like to specify in a generic way I think everybody knows about it our selection shot right sorting algorithms you have merge sort your selection sort right you have binary search sort so a lot of algorithms are already present and within this algorithm you are in short using different kind of data structures right it is very important to understand now the question arises that whether you should be good at algorithm or first you have to be good at data structures right guys remember some of the algorithms like selection sort more sought right now it is coming with respect to different different programming language they are coming as an inbuilt functions so first of all before learning any technology you have to be sure about the data structures because if you know about the data structures you will get the logic to write the code efficiently okay and if you have how that particular data structure works again and if I just take an example with respect to data scientist now where does this data structure comes when you are actually working with respect to data scientist you know that we have something called a data analysis and data pre-processing stage over there you'll be using data structures like our data frames you will be using data structures like arrays lists tuples sets right for performing some particular function now when you have those ideas about that particular data structure you will be able to use them write a very good code right and I'm not just talking about any algorithm over there okay suppose I am writing some custom logic code and when I'm writing that I know how the data is basically coming I can basically use data structures and try to efficiently write that particular code so that I get the output very quickly nowadays also even companies like Amazon Google write your first round of interview will be with respect to data structures and algorithms they tell you how to write a very good sorting algorithm what is the worst case of the time right how fast can get executed what is the best case so they'll try to ask all this particular question then in the second and third round they'll go into your domain knowledge always remember that many students has been asking me so is data structures required I will say definitely yes because if you have the knowledge of data structure right you will be able to learn any programming language very quickly and you'll be able to apply your own logic let me just give an example of myself when I just passed out of my college after my placement was done you know when I was about to write a real-world scenario code right for implementing the logic it used to take a lot of time because I was not sure about the data structures properly then I learned that you know I gained that momentum to write efficient code take an example of why Amazon and Google will be focusing on data structures just take an example of Google search guys if you are typing some core some query in the search engine how much time it takes for your response to come from there somewhere around milliseconds right in the same case if you just take an example of Amazon in where you do a lot of online shopping if you're searching for some product how much milliseconds it'll take just bring down your query and show you all the results milliseconds how it is basically happening there is data structures that is involved apart from that they have internally written their own algorithms right now in case of data science in case of machine learning case of deep learning we know that in machine learning we have various algorithms right and inside that algorithms also they are using different different data structures you're using different different code write efficient code to basically implement that algorithm so data structures is important now if I say that in data pre-processing only after you load the data from a CSV file or from some external database you need to do lot of things over there right that is what I say feature engineering you have to handle the missing values right that time you have to basically play with the data frame like if I take an example of pandas you have bezel converting that data set into a data frame right and data frame is one of the data structures that is come through that library coyness pandas and sometimes you need to convert that into an array to apply some different kind of operations sometimes you may also have to convert that into lists so it is very very important that you understand that guys data structure is important because it will help to build you it will give you the knowledge of how to write logic how to basically implement an efficient code and that is the main aim of every programmer guys remember right because in companies also you will be having a senior person will be reviewing your code and he will be giving you comments okay why you have used multiple for looks over here can't you just write an efficient code with respect to this right so that that but that custom code that you're basically writing is basically a logic and you should try to write that code in such a way that it should take less amount of time to get executed and that is where your best-case scenario and a worst case scenario with respect to time constraint will come if you remember Omega big o-notation right if any of them have heard about that in engineering right at that time I just used to learn this but when I got any chance to implement in the real-world scenario understood all the concept so guys remember data structure is important okay I know in data science in machine learning you have the machine learning algorithm built but still you will require these data structures efficiently in the data pre-processing stage let it be feature engineering of feature selection right this is very very important to understand so I hope you like this particular videos guys please do subscribe the channel if you have not already subscribed and thank you for supporting I've just reached 40k and please keep supporting I this I'll come with up with very interesting content I'll definitely be you know always ready to help you out with respect to your queries providing more and more knowledge so thank you won $1 I'll see you all in the next video have a great day ahead thank you