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Not sure about Codacdemy, they seem to have gone downhill lately imo. If you don't need everything spoon fed and you have the basics of programming down I can recommend Hacker Rank. I've been using it lately to brush up on problem solving with python3.
I suggest trying HackerRank in order to improve your Python skill: https://www.hackerrank.com/domains/python (or codeSignal/any other platform like this)This however would not be enough for an actual programmer, so, think of problems you'd like to solve in your current life and try doing that with Python.
For example, I got sick of searching if tickets for a show I wanted to go at appeared on a site, therefore, I created a simple Python app that launched at the boot of the OS and scraped that website to see if there were any results for what I was searching.
Your imagination is the limit from here.
+1 for bento
If you want to actually practice writing code, you can solve some coding challenges on sites like the ones below:
First learn and get competent with the basics, which you can do from one of many on-line courses in the language of your choice - find one you like and go through it to get a good grasp of the fundamentals and more advanced topics. Then you need to practise - go build applications to solve problems you have. Rebuild simple applications you often use or like or find interesting.
You can do code kata to improve your problem solving skills, but they are only of limited help in general purpose application building. Site like exercism, codeacademy, hacker rank can all help with this - but you should also be doing projects along side them.
If you are lacking ideas for projects then find opensource tools or libraries that you use or like or are interested in and start contributing to them. These have the advantage of getting feedback from more established developers and most projects are very welcoming and friendly to new contributions.
Throughout this you can refer back to more advanced tutorials to learn more advanced topics in more detail as and when you discover your are lacking some knowledge for a particular task but you should always be trying to code something on the side and slowly over time increasing the level of difficulty in the projects you undertake.
There are quite a few. Usually they are based around math or problems which can be easily checked and tested:
- Project Euler - lots of math-based problems
- Exercism - personally my favorite. There is kind of a code-review process, where after you submit your solution you can let others comment on it and critique it, which I have found really helpful
- Hackerrank people sometimes do not like this one but I think its fine. It has more categorized problems - like general category for Python, but also more specific ones for regex, sql, map/reduce...
For context, since the OP didn't provide it:
>Task
>Complete the code in the editor below. The variables i, d, and s are already declared and initialized for you. You must declare 3 variables: one of type int, one of type double, and one of type String. Then you must read 3 lines of input from stdin and initialize your 3 variables. Finally, you must use the + operator to perform the following operations:
>* Print the sum of i plus your int variable on a new line.
>* Print the sum of d plus your double variable to a scale of one decimal place on a new line.
>* Concatenate s with the string you read as input and print the result on a new line.
>Note: If you are using a language that doesn't support using + for string concatenation (e.g.:C ), you can just print one variable immediately following the other on the same line. The string provided in your editor must be printed first, immediately followed by the string you read as input.
>Input Format
>The first line contains an integer, i.
>The second line contains a double, d.
>The third line contains a string, s.
>Output Format
>Print the sum of both integers on the first line, the sum of both doubles (scaled to 1 decimal place) on the second line, and then the two concatenated strings on the third line.
>Sample Input
12 4.0 is the best place to learn and practice coding!
>Sample Output
16 8.0 HackerRank is the best place to learn and practice coding!
Edit: Source is https://www.hackerrank.com/challenges/30-data-types
It does have support for GSon and it also provides an HttpClient, I have used both myself and it worked seamlessly. I'm not sure why OP couldn't get it to work.
Here you can also check which other third party libraries it providers: https://www.hackerrank.com/environment
I was in a very similar situation 2 years ago. Started Learn Python the Hard Way in May, CS50 in June, found out there's way more to computer science than I initially thought and decided to enroll in university even though I left high school 7 years earlier.
Only did CS50 till the Breakout game, but that was more than enough. First year of CS was pretty easy, except for math, I'd recommend Khan Academy and 3Blue1Brown to prepare for linear algebra and calculus. If you want to practice programming, HackerRank helped me a lot, they have hundreds of small programming tasks similar to the ones you get in college. If you have any actual projects you want to develop, even better, I just did a bunch of easy command line tools, nothing major.
I really liked Coursera until they gave me this problem verbatim:
https://www.hackerrank.com/contests/juniper-hackathon/challenges/metals/problem
I actually like these types of interviews (solving a bite-sized, technical problem) but esoteric dynamic programming problems are just garbage.
http://frc-pdr.readthedocs.io/en/latest/ FRC Programming Done Right. This is where I started, going from barely knowing Java to making full command-based code.
https://wpilib.screenstepslive.com/s/4485/m/13809/l/599732-what-is-command-based-programming Very useful for the downright specifics of Command Based. Goes through every 'part' of Command-based programming, which is arguably the best way to program a FRC bot.
https://www.hackerrank.com Good resource for Java IF YOU ALREADY KNOW BASIC JAVA. Cannot really recommend for full beginners however.
I have done the 30 days of code and it was a great refreshing experience. They also have "Crack The Code" challenges, which I haven't gotten around to but I want to eventually.
https://www.hackerrank.com/domains/tutorials/cracking-the-coding-interview
I remember feeling that way for a little while as well when I started out, but it's honestly just a matter of learning new stuff. The more you know, the higher is the chance that you may come up with an idea of how to combine them :)
Suggestions:
Make stuff that's already been built - you can learn a lot from this - like a calculator for basic/advanced mathematics, jackpot number generator and save the numbers in a .txt file, or whatever format you like - you could learn WPF to make a GUI to visualize it etc.
Databases, like SQL, to store data like the numbers you generate with the calc or jackpot num gen etc - either form within the program or from the .txt file. Being well versed with database is a very valuable skill :)
Do code challenges like https://www.hackerrank.com/, https://www.codingame.com/home and more. It's great when lacking inspiration.
If you can afford it, you could consider buying a subscription for https://www.pluralsight.com/ - you can get a 10 day trial if I'm not mistaken. The quality there is really high and many of the instructor are known names in the industry and are very thorough when explaining why, how and when about a subject.
I implemented your algorithm in Swift but without all the temporary storage, and it passed just fine at HackerRank
import Foundation
let nm = readLine()!.split(separator: " ").map{Int($0)!} let n = nm[0] let m = nm[1] var arr = Array(repeating: 0, count: n) for _ in 0..<m { let line = readLine()!.split(separator: " ").map{Int($0)!} let (a, b, k) = (line[0], line[1], line[2]) arr[a-1] += k if b < n { arr[b] -= k } }
var curr = 0 var max = 0 for i in 0..<n { curr += arr[i] if curr > max { max = curr } }
print(max)
After you Learn/build the skills & get some certs you're going to need to build some projects of your own.
Also, during technical interviews, companies will ask you to solve problems to prove your understanding of core programming concepts. For that I recommended sites like Leetcode & Hackerrank
Also, I didn't mention YouTube but YouTube is a gold mine for learning. There are tons of free courses/instruction videos on there that will be ridiculously helpful
Take a look for free courses, there are some great ones out there.
https://www.udacity.com/ is a great starting point, and will basically teach you everything a university would teach you earlier on.
The main thing you need to do is get interested, learn how to puzzle things out, https://www.hackerrank.com/ is a website where they have huge numbers of puzzle problems that rank up in difficulty until you are in full blown A.I. (with reasonable links to resources on the way). Learn how to tackle these problems
Like /u/toomuchtodotoday says, certs will only get you so far, the much more important thing is proof that you know how to take on a problem and that you are interested in doing so.
I'm some one who went through university to learn what I did, but I've worked with many people who simply got bored in high school and walked in somewhere and shoved their enthusiasm and problem solving down the managers throat.
If you're always comparing yourself to others you will never be satisfied. College is a lot of work and it doesn't help you to be focusing on too many things at once. Burn out is real - avoid it. Take care of your body - exercise. Focus on your education, and doing the best you can (you won't have much spare time anyway). College is one of those unique experiences in life where you will be around A LOT of people in your peer group - take advantage to socialize as well as meeting members of the opposite sex. You will never be in this type of situation again.
If you want practice try hackerrank.
Code Wars and TopCoder were mentioned which are great but there is also HackerRank and Coderbyte. Not sure how these didn't make the list above.
Here would be my next steps:
Read An Introduction To Statistical Learning With Applications in R, practice ML with Kagglecompetitions with emphasis on using scikit-learn, pandas, numpy, practice SQL/Python with Hackerrank and Leetcode. There are also online courses with sites like Udacity/Udemy/Datacamp. Finally, practice for interviews with those sites and ML Interview Prep.
If you are still in college do a data science internship for resume and experience. Best of luck!
I am taking it with Dorodchi and we haven't even started coding yet. I have no idea what's going on in this class, but I think it's gone to shit since Illson left.
If you're looking for Ruby practice, here's some.
funny you ask, I noticed striking similarities in questions - namely the exact same question lifted from hackerrank.
https://www.learneroo.com/modules/4/nodes/83
https://www.hackerrank.com/challenges/correctness-invariant
I haven't looked to see if there are any more directly lifted like that. I also don't know if hackerrank is cool with this, e.g. they release their problems into public domain or not, so this may not even be "a thing". But I did notice it.
Answering your questions below.
- It is just one file
- You can write custom test cases but no unit tests. The code will be run against some known test input and some hidden usually so part of your task is anticipating what the hidden cases might be. That will make your assessment go a lot smoother
- There are other small quirks like the main function being static (at least in Java). This is different from Leetcode. Again, might be specific to Java, but hackerrank assessments only support Java 8 usually so I cannot use newer features out of the box like Pairs.
- Yeah thats pretty much it. Hackerrank does have some ide like features like autosuggestion unlike platforms like leetcode.
- A lot of companies care about your progress like the other poster said. Unless you confirm explicitly that this is ok, I would personally not copy paste from an IDE. As someone who has looked at the detection of possible plagiarism in these online assessments, a wall of text being pasted looks suspicious.
​
Not sure if you came across this already but this is a great way to familiarize yourself with the environment. https://www.hackerrank.com/test/sample
I highly recommend python questions serie for practice and learning, very useful! also some companies are hiring directly from hackerrank so if you can solve problems you may have a great advantage
https://www.hackerrank.com/domains/python/py-introduction
on the other hand you may follow most active python job sites for what skills and requirements that hiring companies are looking for
Good Luck
To practice actually writing code try https://www.hackerrank.com
If you have friends who are learning to code, try teaching them too. I found that once I starting teaching I got much faster at coding, but it was also because I was coding a lot.
Choose a language that you like and get really good at implementing standard algorithms in it. For example, all the basic sorting algorithms, depth first search, breadth first search, etc... Now when a interviewer asks you to implement something that uses say depth first search, you will look amazing because your not really thinking. You are just typing in code that you know, and perhaps modifying it a bit for whatever they are having you do.
Good luck :)
One thing I enjoyed about learning programming is Hacker Rank. You can solve programming problems of increasing difficulty and get badges as a reward, it feels pretty nice I think. It's all free and they have a tonne of languages you can use.
I like how it breaks up the learning into tiny steps, it's very nice.
It really depends how far along you are.
I'd suggest Hacker Rank. They have great tutorials, and exercises for you to practice with. If they're too tough, there are discussions where people will walk you throw the example. Great self paced learning.
Once you get a firm hold on the basics, I think you should practice yourself. Download data from Kaggle or look online, and pull the data you need. You'll have to find a way to hook up to a database with a MSSQL or MySQL client.
Nakakatuwa magsagot ng coding challenges sa HackerRank. Minsan talaga pag nasa mood ka mag-code isang malaking:
CAN'T STOP WONT STOP
feels eh. For those who want to try programming, it's a good resource too.
How can I get beyond a beginner / early intermediate stage? How can I find a mentor or work with more experienced Haskell developers?
I've been messing around with Haskell off and on since 2011. Only this year have I finally felt moderately productive on my latest project, but I still get thrown completely off balance when I do something outside my comfort zone. For example today I was trying to get ReaderT to work with servant. People totally helped me, but I didn't understand their answers, and had to apply their advice blindly.
As a beginner I read LYAH, followed bitemyapp's guide, and did problems on https://www.hackerrank.com/. What should I do now that I'm an "early intermediate" haskeller besides hacking on projects?
I feel like I learn very slowly, and if I were working with a more experienced haskell dev I would learn much faster. Given that haskell teams are rare (where one normally gets this sort of mentoring), is anyone interested in some kind of mentoring relationship? I'm more than willing to pay it forward.
Project Euler provides math problems (and a lot of them too), but if you want a different style of challenges have a look at HackerRank. I've also heard that CodeWars isn't too bad but I haven't tried it.
Good luck!
I'd first like to thank you for pointing out this resource. I'm doing a lot of research on different methods of teaching how to code and this site will help me a lot.
Second, if you're struggling, I advise you not to be intimidated. This is a feeling you should be experiencing. I only tried the first kata and as I sort-of-kind-of know JS, I hit a wall too. I think that learning via challenges is fun, but only if you've reached a certain comfort level with the language you're programming in. However, one way of attaining that level of comfort is just slogging through the challenge but not being afraid to look a few things up. The "learn by doing" method isn't as effective if you first don't know how to "do", know what I mean?
So my advice is even if you decide walk away from this particular site for now, do something, anything with your language (in this case, JavaScript). If you're looking for a similar type of format I suggest HackerRank. If you want to learn more about JavaScript you can also finish up the HTML/CSS and jQuery courses on Codeacademy and then get started building a website. Obligatory StackOverflow for programming questions you hope have already been answered. Also, if you're looking for something more server-side, see NodeSchool in the sidebar.
<optional>I've tried starting a blog that posts submissions about both programming problems and solutions like this. Right now it's quite empty and only has a Hello World problem posted, but if you happen to be smitten by this shameless promotion then I ~~beg~~ suggest you check it out and (hopefully) contribute.</optional>
I'm not familiar with HackerRank, so please ignore if I got the wrong site, but it seems they already have a section for C#: https://www.hackerrank.com/skills-directory/c_sharp_basic
The way I see it is that these practicums would be conducted the same way as a typical technical job interview would go. You would sit down with your interviewer and they would give you a problem and watch you solve it. That being said, someone who isn't going into software or tron or something like that probably wouldn't see a point in an evaluation like this. But the same thing can be said for other programs, for example, I want to go into software, but I still had to take chemistry. That's just what happens when you take a generalized first year.
In terms of marking this way compared to labs/projects, in the labs and projects, there's nothing stopping you from getting help. Getting help is obviously good, as long as you're learning from it. I think the point of the practicum being marked like this is it tests your knowledge, not the knowledge of you and google and whoever you may or may not ask for help.
Honestly, as someone who has been coding since grade 9, if you wanna do well on the practicum, the best way is to practice. Do the practice problems on avenue. Try some of the problems here. The best way to practice though, in my opinion, is just to think of something you want to make and then make it. When I was first starting out, I an extremely poorly coded python console game during a long car ride. Is the game any good? To be honest, no. Is the code any good? Also no. But I learned basic programming concepts and familiarised myself with python syntax. If you're ever stuck or need help, there will always be someone in the 1p13 discord who is online and willing to help. But good luck, don't let exams stress you out too much, you got this!
Was it this problem? https://www.hackerrank.com/challenges/crush/problem
I haven't looked at that one yet. But looking at the Leaderboard tab for it and filtering to just Swift submissions, there are plenty of people who scored the perfect 60/60 on it, which means that it's certainly possible to implement it efficiently enough in Swift to pass all the tests without timing out on any of them.
Companies will send out tests called Hackerranks to a lot of applicants. The only big N companies that I've gotten interviews with are companies that send out Hackerranks because if you do well enough on the test they'll interview you. Personally I practiced for it by doing leetcode problems but you can see some example questions here if you're interested.
Hi I just want to say I am the same age as you and am having some of the same difficulties, especially Life balances. Learning a new skill has really been taking a toll on me. I really wish I can say something to help you with that growing pain, but I can just say keep going and trying. Because if you win I feel like I win as well.
I just started the 30 day of code challenge(https://www.hackerrank.com/domains/tutorials/30-days-of-code), it may help with just saying you at least did something each day to work towards you goal, which I believe is a big help. I think for people like us keeping motivated and not getting boggled down with information overflow as well is helpful to stay focused on one little goal/task at a time. Good luck with everything and if you need any moral support let me know, because I’m there with you.
There's a fair amount of email/slack/meetings and things, but other than that, I usually have something to do. Every once in a while, there are a few awkward days between project where I've got no work assigned to me. In that case, I'll just do some personal development or fun projects. Maybe learn a new language/framework, do some hacker rank problems, tweak my editor/browser/OS, or just read some webdev blogs/subreddits.
I've used Hackerrank myself. It has introductory programming tracks in C++, java, and python (among others). It has a very nice problem presentation format. I'm unsure how useful the language tracks are for somebody entirely new to programming as I've mostly used other problem sections on the site.
I've also heard good things about codeacademy but I can't give any firsthand experience.
It's all going to be very subjective and different among everyone.
I started with C# so I can build games in Unity, but I shortly moved towards C++ for the flexibility, how powerful it is, and so I can build whatever I want away from C#.
Javascript, Python, Ruby are fairly easy to pickup and learn also very popular in the web.
C++ and Java are very powerful and can be used to build programs.
A couple sites to take a look at: https://www.codecademy.com/ A site where it gives you a starting place for primarily web development.
https://www.hackerrank.com/ A site to practice your programming skills.
https://github.com/ Browse through projects people openly posted online for others to share, contribute, or as reference. Alot of fantastic code. The source code for DOOM, Quake and various other games are on here to take a look at and tinker with!
It's going to be tough, but stick with it. Choose a language and never be discouraged.
If OP wants more of a guided instruction, try Khan Academy or HackerRank (for starting only).
However, /u/Lalaithion42 says it best. Just find a simple tutorial on downloading a compiler and build your own programs. It's much easier to get motivated this way.
Finally, you really won't need to do any of this. Getting a leg up is always great, but any decent school will start from the ground up. Never let yourself get behind in school and you will come out ahead.
I started going through the algorithms track on Hacker Rank, just doing the warmup questions. You can pick your programming language for each question, all the popular ones are available
Practices make perfect
You can practice on this site: Hackerrank (Helps you in problem-solving and analytical thinking skills)
I wish you all the best of luck.
Also https://www.hackerrank.com/ has a raft of test questions ranging from trivial to devilish. Paid sites include https://www.stratascratch.com/ and https://leetcode.com/. No clue how good either of these are, though I've seen some videos of a guy solving problems from stratascratch and the problems seemed realistic.
Personally I like having a goal to work towards, so if you learn like me I'd recommend looking up projects you can do instead of guides. Online coding sites like HackerRank can supply you with practice problems too.
As for guides, I found a few channels which might interest you, but I haven't used them myself so I can't guarantee anything.
tira tu cv y puedo ayudarte a corregirle algunas cosas, tb puedo ver si te puedo recomendar en un trabajo
si sabes javascript, aprendé react y react native (piden un monton y no es tan dificil, mas teniendo base de js).
es cierto, por lo que contas, que te toman en cualquier lado con eso, hay que ver que estas diciendo/ haciendo mal y te tira para atras
sos bienvenido a escribirme por privado, te re entiendo por que estuve en una situacion muy similar (de hecho estoy medicada), tambien me llevo unos meses encontrar laburo y ahora estoy en un lugar que AMO y se lo debo en parte a mucha gente que me ayudo a armar el cv, prepararme para entrevistas, darme tips.... asi que puedo compartirlos con vos.
entrenar con https://www.hackerrank.com/ tambien es buena opción.
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tambien te puedo tirar tips para dar clases particulares de algo que sepas mientras tanto (tambien lo hice mucho tiempo y te permite no estar tan ahogado)
​
Metele que laburo hay y ya te va a salir
Mano, llegate a https://www.hackerrank.com/ Y hacer los retos de 30 days of code. Utiliza github como plataforma de portafolio, créate metas, publicalas, envía propuestas en upwork y repite el proceso.
I think you would find HackerRank intersting. It has over 50+ challenges starting from basic selects to advanced joins. In each challenge you will get a new problem. Once you run/submit your code you will get a feedback from the system whether you did good or not. All you need is an account (free).
Personally I really like doing the Algorithms practice on Hacker Rank. I think it teaches you how to solve problems with code and that's really what you want. Moreover it gets gradually harder which is perfect.
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Poti invata tot ce tine de algoritmi pe cont propriu.
Iti recomand sa incerci o platforma gen HackerRank. Gasesti acolo probleme de rezolvat cu diferite niveluri de complexitate. Daca incerci si sa inveti principiile matematice din spatele algoritmilor, nu cred ca o sa ai probleme.
That depends on your level.
CodingBat is nice to work on the basics like
- Logic (if, elif and else statements)
- Making functions (a set of instructions that can take input to solve a problem)
- Working with strings (text)
- Lists (data grouped together like in a box)
Codingbat was my favorite site when I was learning the basics. The exercises are straight forward and have the right amount of challenge in my opinion.
HackerRank is a great site regardless of your level. This site will last you probably forever. There are dedicated Python exercises and a lot of general exercices. I highly recommend this site.
TL;DR: Codingbat was for me great for starting, after that Hackerrank was great.
Have fun! :)
Just take HackerRank's 30 Days of Code and you'll cover up to about 70% of CS112 and even some material you'd cover in Software Methodology.
Hmm, answering questions doesn't always show the actual skills. While I do agree asking the right questions is important, showing some skills on a lab or some environment can be crucial to finding new personnel effectively. But indeed, facilitate some actual decent setup and not a shitty lab.
Maybe you're not aware but there are even platforms for these kind of things (https://www.hackerrank.com/ for example).
How frequently do the Google and Facebook ask about graph processing algorithms?
I ran across this problem on hacker rank where I believe you need to find the connected components, find the minimum spanning tree of each connected component, then do a mini optimization algorithm for each minimum spamming tree.
I remember going over Prims/Kruskals in class, but I am not familiar enough with it to write it from scratch. Should I spend more time studying graph algorithms?
> If your fundamentals of Data Structures, Algorithms, Discreet Math, OS, Networks, Databases, Programming Languages, Some Basic Compilers are clear you (Not rot learning. You should have created an basic Database for joy of creating it atleast once. If not created atleast thought about it.) and you can code. You are a hot asset for the job market.
This is important for everyone trying to improve their basics. I began my undergrad as an electrical engineer ~15 years ago. The only way I could improve my programming was to go online and search or programming problems and try to solve them in a language I wanted to learn. For me it was C++ and python to solve Project Euler problems :) A good alternative now would be hackerrank (if you get stuck, you can look at solutions. Just do not make it a habit).
> I disagree with the idea of learning Android / Javascript / Locking down to a programming language @ College. You should form your opinions based on liking to make something exciting and not based on market conditions. What you learn today will all change in 6 months.
This might be a bad idea if that was the end goal. But it is still a good idea to have a specialized skill set after you are confident with the basics.
I would highly recommend using sites like https://www.hackerrank.com. It's a site which gives you different algorithmic problems which you have to write code solutions to. You can use any language and it'll give you a great head start on what you'll be learning in class.
First, here's some other programming practice sort of places that aren't math related necessarily. Maybe you already know about them, but they're worth mentioning.
- /r/dailyprogrammer - MWF programming problems get posted, great for practicing/discussing languages and algorithms
- HackerRank - Algorithms challenges, akin to the sort you might see in homework. In-browser compiler for a bunch of different languages
- Leetcode - Similar to HackerRank, I like it better
I'm sure there are more, but those are ones I'm familiar with. Those are all sorta small things like Project Euler, just not math specific.
You can browse /r/coolgithubprojects for links to cool GitHub repos, sometimes they are looking for contributors but if not it's a great place to get ideas and inspiration.
For reference: http://www.cplusplus.com/doc/tutorial/ For challenges: https://www.hackerrank.com/ + http://rosalind.info/problems/locations/
One straightforward but not necessarily easy strategy is writing progressively more complex games, starting with a Zork-like, and then using SDL or similar to make a Tetris for example.
I'm in the same process of self-instruction, off and on for a year now, and I've found the projects in which I've retained the most just started with a language agnostic problem, decided to use C++, and just looked up the pieces as needed.
I've also heard good things about Stroustrup's Accelerated C++ book.
Happy coding, friend!
To be honest, if there isn't some sort of coding test as part of the interview process, you probably don't want to work there.
Try Hacker Rank, Coding Bat or Project Euler for practice. Or just google for sample interview programming challenges.
Edit: for eggs, scramble them but mix in some sauteed veggies (spinach, mushrooms, bell peppers, zucchini all work great), meat (ground beef, turkey sausage, chicken, etc), some diced potatoes if you've got the room for the carbs/calories and then mix in hot sauces and/or sriracha and/or salsa when it's done.
Edit 2: also, mixing in some low fat shredded cheese is kewl.
Reversing a string is the same level as FizzBuzz and is basically the simplest question an interviewer will ask. It isn't even a good test to find a good coder. It is just to weed out people who can barely code at all.
I would definitely practice more. Potentially check out sites like HackerRank to get more comfortable with problems like these. You will find reversing a string as an intro level problem on this site.
Grab your favourite IDE and head over to <strong>LeetCode</strong>, <strong>HackerRank</strong> and <strong>Project Euler</strong> and just start to solve stuff.
There's a bunch of other sites too, just have a Google around.
This is nothing like any kind of interview test. This test is pretty silly, actually. Lots of simple logic puzzles, and basic math.
If you're looking to practice questions you might get on a programming interview, there's two types: Programming questions like https://www.hackerrank.com/
And then more general programming interview questions, which are often about specifics related to the job you're applying for. Such as "What's inheritance vs composition, and why might you use one over the other?"
They will trip over themselves to get you in their program. But you might not even need one with your background.
Just apply for jobs and see how it goes. If you've already done some programming you probably have the chops for an entry level gig anyway. I think you may overestimate how good entry level programmers are at their job.
If you want to measure yourself in some way, you can muddle through the hackerrank problems in c++, and that will give you an idea where you're at. If you can grasp the problems and write halfway legible code to solve them you're better off avoiding the cost of a bootcamp.
I don't think it's because your female - that certainly can help of course, since many companies have diversity initiatives. But as a 20 something white guy with 4 YOE I got similar levels of interest. I barely applied anywhere, places were hitting me up on LinkedIn and other job boards left and right. At one point, during the month of August I got 189 messages from LinkedIn. 🤯 I made it to the final rounds with 3 companies, got an offer from one and accepted it. I was also tech screened by a few other places, both big and small. I must have spoken to at least a dozen recruiters, many went nowhere but a lot led to tech screenings and other interviews.
For tech interviews, def practice The Hackerrank Interview Prep Kit problems. A lot of similar problems to those have shown up for friends and I during tech screenings. I also saw a few LC questions pop up, so doing all the easy/medium ones you can will help. I didn't see any particular hard ones, companies tended to stick to an easy one to start and then a medium one to see how well you do with a bit of pressure.
Pas vraiment la question.
Mais voici deux site avec des problèmes allant de simple à très complexe permettant d'apprendre et de s'améliorer en algo.
I would learn the basics first. Perfect the basic ML and data Python libraries such as numpy, pandas, and scikit-learn way before even starting out with neural networks. Then practice SQL/Python with Hackerrank, ML with Kaggle competitions, and ML Python Coding Prep. Once you have the basics down, then start out with Keras for deep learning.
Start with C , most people out there will tell you to start with Python because it's "beginner friendly" and "easy" .
They aren't wrong , but i believe they lose a huge part of overall understanding about how stuff works in each language .
I started coding in C when i first got into uni , problem was that i wasn't able to attend any classes back then for a number of reasons . Instead i watched the tutorials of The New Boston( Bucky Roberts ) and they helped me start this whole thing .
Besides that it's obvious that whatever you do you should practice as much as possible , no tutorials or classes or anything will teach you better than actually coding yourself . A good option for this is HackerRank or LeetCode .
For the love of god , make sure you fully understand how pointers work and then move to C++ and dig into data structures , algorithms and classes . There are countless tutorials out there in YT about em so you should be fine .
Since you're very new I would suggest first go through sololearn.com and follow through their tutorial. This will make you familiar with the syntax.
Side by side, try out a few programs. You'll get a lot of errors, use stackexchange (most of your doubts will be available).
Then you can also try HackerRank's tutorials, they teach you by giving problems https://www.hackerrank.com/domains/cpp
This will make you familiar with the language and the process of writing a program.
Once you finish this, you can post again on this subreddit because you'll have a good understanding of how do you want to use this language.
Good luck!
I've recently been doing the Hacker Rank 30 Day Challenge, which is a great way to solve a bunch of problems. I've learned a lot.
A course I recently finished is the World Quant University Data Science Module. It's completely free, although you have to apply. I went from not knowing any programming to be able to use OOP, Numpy, Pandas and Scikitlearn. They even teach you to make (basic) machine learning models, which is awesome.
And there's also the subreddit r/udemyfreebies which ways has tons of free programming courses
Hope that helps
Try to break the big problem down in smaller sizes that are easier to solve individually. Copy pasting code is easy. Seeing a problem and then identifying the individual parts that make up the Problem is harder and needs practice. Try the challenges on https://www.hackerrank.com/ and then try to golf your code.
You might try looking for a job as a wastewater operator depending the qualifications required. This would be great if you plan on working in wastewater treatment. I second the idea of working on other skills too like SQL. Also, picking up a programming language is easier now than ever before with the wealth of sites that exist for that exact purpose. codecademy and hackerrank are two that I have enjoyed. Best part is that they have free offerings.
No problem!
In that case yeah Python seems like a good choice. (It's also a really fun language to use, just because you can really crank stuff out.) Keep in mind that there are two versions of Python (2 and 3). Skills translate easily from one to the other, but it can be a bit jarring to switch back and forth.
It's been a while since I started from scratch, but here are some resources, off the top of my head:
/r/learnpython - has lots of links to more resources, and helpful people.
Official Documentation (for 3) - might be a bit less palatable, but I personally like to have all the answers in one place. Also has tutorials.
HackerRank - provides challenges which gradually introduce more advanced concepts.
(There are lots of other options of course, these happened to be suited to my learning style I suppose.)
My favorite way to learn a new language is to start a project and pick up what I need as I go. Fair warning though, I ended up with some messy code in my first couple of projects because of this, but had a lot of fun.
After a couple of weeks you could probably start writing some very basic games (like Snake, Space Invaders, whatever you like). You're definitely right that it will be great to have a long term goal/motivation to work toward, and I think projects helped me with that.
If you ever need any help with anything, feel free to message me.
I'd suggest "Think Python" to quickly look through it and do the exercises, it does as well not focus so much on many methods but a way to think programmatic it also has a nice very shot introduction to algorithms, do work through the Hash Map example.
I'd also suggest you to start a mini project in which you just want to get it done for which you use 1.) the Python documentation 2.) Stackoverflow for questions 3.) try to contact offline Python or Linux user groups.
Recursion isn't the most important part, practice is at your stage. So is the knowledge about modules. Learning python is like learning a foreign language, you have to understand how it is used, practice it and then learn and read books to further your horizon. The foreign language books equal the modules, frameworks and projects that are written in python for your case.
If your mini project has reading dates, strings out of a simple text file with a format you know you will learn a lot. There is also the Goldmansachs Hackerrank thing which has a few sensible questions in which you might get to think about algorithms.
As to the point about the standard algorithms used in interviews, you can do the free mini-course associated with the book Cracking the Coding Interview on the site HackerRank.com. Most of the tasks in that course are available in Swift, so you can play along with their test cases (though I did use C for some that weren’t at the time available in Swift.)
I used those to brush up on those standard algorithms before a coding interview with Amazon, and nailed all of the coding stuff. Literally every question they asked for coding tests was from that material. I very much didn’t do well on the interview questions where I was expected to not roll my eyes or say “for fuck’s sake” when talking to them; your mileage may vary.
On the other hand, I have a friend who did one of those boot camp style courses, and he has a job in the field after completing it. He’s working with Node.js, which sounds like hell to me, and frankly I don’t think the code he writes is any good, but he is gainfully employed. Like the commenter to whom I’m responding, I would likely hire a self motivated amateur who applied the skills learned from coding test sites and YouTube videos to various interesting projects (especially if I can see it on Github) than one who came out of those programs.
Make an account and practice some code! CS 141 was basically "C+" which means we code mostly in C with some elements of C++. When doing the challenges make sure your code is done in C. Also, if you can, I recommend learning how to use the command line and a UNIX terminal. If you use MacOS or Linux you can watch tutorials on compiling code and running programs, if you're on Windows I would recommend learning to use "Bash on Ubuntu on Windows". Learning to compile, edit, and write code through the terminal is another huge aspect of CS that'll become VERY important as you progress through courses.
HackerRank has a CTCI track that I used to prepare for interviews. Might be a nice way to do problems together.
They also do a 30 days of code challenge which helped me a ton, as well as different tracks for Java, Python, SQL, C++, etc. Something else to look into for group practice.
Since I was applying for jobs requiring different languages this helped me learn more about Python/Java/brush up on SQL/etc quick enough that I felt more comfortable with the language during interviews.
You might like something like Codingame. The basic idea is that you're programming some agent to play a game, so it's more engaging than trying to start a big project or just doing coding exercises that you don't care about.
I'd also recommend hackerrank and leetcode, although those are more for people that are preparing for technical interviews. Both good options if you're just looking for programming experience, though.
It's not a game making tutorial either. I've completed quite a few of the puzzles and at least two of the AI challenges. It's basically a distilled version of technical interview questions. Compare it to https://www.hackerrank.com/.
Most people's "hard" interview stories are about difficult whiteboarding exercises or some such.
The good news is that there are plenty of resources, like Cracking the Coding Interview (considered the "Bible" of interview practice books), HackerRank, etc. to help you get better.
I recommend practicing HackerRank alone, and doing problems from CtCI (yes, the book is so good it is usually referred to by an acronym) with others under "realistic" conditions (i.e. in front of a whiteboard, with one person posing as the interviewer and the other trying to solve the problem).
The bad news is that fundamentally improving anything takes time. If you practice interviews twice and do a few problems from HackerRank each week, you will see significant improvement after ~3 months.
Lastly, I leave you with this fantastic talk by Sean Lee, a CS alumnus from the University of British Columbia, about interviewing with big tech companies.
Long story short, just practice and keep trying; failing once, twice, or even more times is no problem. Companies (rightly) care only about how good you are now, not how much you sucked a year ago.
Don't know. I would make sure I could:
- write a basic class with public, private, protected members and methods
- use virtual methods in classes, understand them and inheritance
- be able to explain what a virtual table is
- know how to use a (hashtable) unordered map
- know how to use an (ArrayList) vector
- work through the c++ section on Hacker Rank
https://www.hackerrank.com http://codingbat.com/ si sa te apuci de un proiect personal cum mai spunea si altcineva, dar nu fa doar asta pentru ca o sa te folosesti de metode limitate. Fa asta in paralel cu exercitii de pe siteurile mentionate anterior
Just poppin in to say: Keep up the good work! seriously, programming a tool that can make even some of the most complicated problems you will face in your professional career interesting and fun.
By the way, I don't know your background, really, but have you tried any of the following sites:
Good luck!
I can recommend trying some programming challenges. For example:
This way you can test your knowledge and if you do not succeed, you can google the solution and learn something new this way.
I've seen recommendations for https://leetcode.com/ and https://www.hackerrank.com/ . Honestly, sites like these are more useful when interviewing with the big tech companies (i.e. Google, Facebook, Amazon, etc.).
Not sure my way would work well for other people, but after learning the bare basics from tutorials and stuff, pretty much all of my further learning came from completing HackerRank challenges. They range from very easy to extremely difficult, and there are lots of different topics. If you get stuck on a challenge, other people have usually posted their own working code in the Discussions section.
Other people's HackerRank solutions are a great way to learn about new modules and methods, as well as to be exposed to more complex logic and to see what types of problems coding can solve. With enough practice, you get the hang of being able to write that sort of code yourself and you get a feel for what code can and can't do.
Kaggle has really nice mini-courses on Python and Pandas, as well as machine learning and other data science concepts, if that's your thing. Hope that helps!
> practice with the real data
For what it's worth... practice with real data isn't a thing.
You should take a run at https://www.hackerrank.com/. It's SQL questions range from easy to very tough. The queries are not particularly real, but only because real data is just so messy. The underlying query techniques needed to answer the questions are 100% transferable to real data.
In terms of books, I really love An Introduction To Statistical Learning WIth Applications in R. Its a great start. In terms of websites to practice, AceAI was built for interviews, Hackerrank is great for coding practice, and Leetcode is often used by companies for assessments.
To start with most people call it 'Core Java'. I have read Programming with Java by Balaguruswamy which i can vouch for. It is a really good place to start with even if you dont have much knowledge on programming. It covers most of the fundamental concepts in Java and explanation is pretty laymen.
For coding experience, you can start with Hackerrank course. I have done this course in the past and it has basic exercises on all the funcationlities concepts that are used in day to day coding.
Learning Java and studying Algo&DS are different things. I would advice get a good grip on the Java language first before jumping into Algos. You will get some basic exposure to Datastructures while learning any language which will come in handy while implementing Algos.
I actually really like HackeRank, but there's a approach to doing it well IMO. The problem with sites like leetcode or HackRank is that the big O required for full points (or often even partial points) is so strict that is restricts the answers to very specific academic algorithms that just aren't feasible to memorize or reproduce on the fly in an interview. They are excellent for testing problem-solving in a fizzbuzz manner though.
For example Build a Palindrome is a great problem solving exercise and an excellent candidate for modern stream/lambda/mapreduce approaches in Java. Unfortunately the only algorithm that is fast enough to get over 40% score is a very specific algorithm using suffix trees called Ukkonen. It's just not reasonable to expect a candidate to pull that algorithm out of thin air. Instead whiteboard the problem with pseudocode or in a clean IDE and look at how the person problem solves.
The best example I can give for this is one of my good friends who is an excellent developer making 6 figures in an extremely low CoL city in Canada. He got something like 30% on the HackerRank test his new company gave in interviews, but senior devs at that company told management they'd be idiots for believing HackerRank scores and passing on him. He has a reputation for being an extremely competent and skilled developer to the point that people are telling HR "don't let this guy go!", but there's no way even he was answering 4 expert HackerRanks in 40 minutes. Especially as an experienced dev who hasn't touched academic algorithmics in 5 years.
If you haven't tried hackerrank it might be worth a go. It gamifies solving challenges and enjoying overcoming difficult problems and being able to persist when you're stuck is core to programming. Also absolutely make sure you're taking 5-10 minute breaks every 45-60 minutes whatever your learning strategy ends up being.
Whoa! I'm surprised I'm the first person to mention this: Try 30 days of code or some other similar online learning course over the summer, and then go into 100/205 if you still wish to.
https://www.hackerrank.com/domains/tutorials/30-days-of-code
I think that hackerrank course was more thorough than my 110 and half of my 205 course combined. You'll also save yourself 8 months of uncertainty. You may love it or hate it, may as well find out in a few weeks rather than several months.
I agree with this. Learn to code for yourself.
It's a great way to develop your problem solving, mental models, planning and structuring. It's also a lot of fun.
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I started out tackling a degree in Mathematics with Computer Science but I left after the first year to help tech founders refine their vision and get people excited about their ideas (without bombarding them with the tech). But all along I've done things like build apps and solve coding challenges on HackerRank. I've realised that the product side of things is a real passion for me, so I'm returning to study Comp sci and AI.
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While thinking about what interests you might be a good way to start, I think it is very easy to get put off by scope of many projects.
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Instead I'd start with a more structured course such as Berkeley's CS 61A. They have all the course material online including lectures, a comprehensive book, notes from tutorials, assignments, projects and exams (with mark schemes). The spring session of the course is currently in progress so you can either follow along with that or find the content from a previous session of the course, available at the bottom of the resources page.
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Once you have a basic understanding I'd start checking out some of the practice challenges on HackerRank.
I think that you should either get comfortable with haskell first, or with algorithms. If you're not comfortable with any of them, you're going to find it difficult to learn both at the same time.
I recommend that you first implement an algorithm you know in a language that you're comfortable with, and after that you can try to implement it in haskell.
If you find it really difficult to implement even the basic stuff in haskell, maybe you should give the problems on HackerRank a try.
I had a job interview last week, and I could be moving back to Ontario soon!
I'm also improving my Python skills on HackerRank which has tons of exercises. I recently learned what the map(type, list) function does. It turns every object in the list to an object of that specific type. This can be useful when you're extracting data from an input() file which Python will naturally store as strings instead of maybe numbers.
For example:
file = '1985 1987 2001 2015' years = map(int, file.split(' ')) average_year = sum(years)/len(years)
This average calculation only works because you use map to tell Python to treat the years as numbers not strings.
Try Hackerrank. It has a host of problems that cater to your needs. The community is also helpful.
Also look at GeeksForGeeks
If you feel lost or don't know where to start among these, feel free to ping me.
Go to https://www.hackerrank.com
Lot's of challenges in several categories:
- Warmup
- Implementation
- Strings
- Sorting
- Search
- Graph Theory
- Greedy
- Dynamic Programming
- Constructive Algorithms
- Bit Manipulation
- Recursion
- Game Theory
- NP Complete
- Debugging
Have fun!
https://www.hackerrank.com/domains/tutorials/30-days-of-code
Edit: looking at the 100 Days of Code course, it is much more Python focused. HackerRank only has a tutorial for Java. But - the comments are helpful (though you have to ctrl+f to the Python related), and the page tests your Python solution (as well as many other languages).
I found it useful, because it wasn't another step-by-step tutorial, it challenged me to do research on different topics to solve an issue.
HackerRank contains many interactive exercises. Some focus on the language themselves, others are about algorithms, or math problems, or data science.
If you're a mathy-minded person, then the first 25 Project Euler problems are great for trying your new Python skills.
Hack This Site! has a couple of fun JS "missions".
Hackerank: https://www.hackerrank.com/domains/sql/select
Dunno what the software you're using is, but if you want to get a hang of running queries, you could install mySQL workbench, then use its "practice" DB (I think it's the cities of the world and populations or something) to practice. Maybe overkill, but it's pretty user-friendly and easy to get it up and running in a weekend.
Btw, what are the key requirements for a data analyst job? Does one need a degree in stats/maths/science? I just checked some job listings and the main software requirement seems to be Excel (advanced Excel?). It's hard to gauge suitability for a job, but I'm wondering if a nooblet like me would be in with a chance? I've made fancy graphs and neural nets in Excel, and did a relational database systems module at uni (I can design and normalise a DB and use SQL). Would that suffice?
There is an algorithm for finding lowest common ancestor in O(log n), would it speed things up more?
Basically, you just store not only one parent for each node, but also all ancestors with depth differing in a power of 2 (so there is an O(n log n) precomputation, but that can be done lazily), and then do a binary search.
For challenges I suggest combining this (or any other book) with websites like https://www.hackerrank.com/
My opinion is that the challenges you want are for getting problem solving skills and most of these challenges are thought in the first programming language you learn (usually in high schools/universities it's either C or Java). JavaScript is when you know how to solve problems and just need more tools to create products/projects.
Please tell him that practicing for interviews is an absolute MUST in this field. I have a CS degree (with a high GPA) and 5 years of experience, and even I need to spend a minimum of three weeks full time reviewing and practicing for interviews to do well (potentially longer if I'm also working). These things are very tough, and a totally different beast than anything you experience at school or work. The payoff is amazing if you do this though, as there is such a high demand for people with tech skills. If you can combine those tech skills with great people skills, even better. You just have to put in the hours and endure the pain of jamming algorithms and datastructures into your brain for a few weeks. Interviews are changing in some places to have a more practical focus, but the traditional type of preparation will still be useful. My recommendations: https://www.amazon.com/Cracking-Coding-Interview-Programming-Questions/dp/0984782850 https://www.hackerrank.com/domains/tutorials/cracking-the-coding-interview Interviewing.io
Getting the first job is the hardest, and if he feels like the person who he is talking with could be a good mentor, it might be the right choice. However, it sounds like he didn't prepare as well as he could have, so he might be eligible for other jobs that are better located. Definitely consider his mental health, though, and don't push him to keep going if he clearly is suffering.
Lots of waffling in that last paragraph there, sorry. I just finished the interview process and accepted a job, so I feel his pain. I was lucky to have several job offers all at once, but I would have been very tempted to stop if I had only received one, even if it wasn't great. It's a grueling process!