Odd that the Stack Overflow site does not have the "career or education advice" close reason on it (like Software Engineering does), but that's why I voted to close. — Robert Harvey 56 secs ago

The problem had nothing to do with mapvalues, and change from that function to any other code (base or otherwise) would fix nothing unless/until the OP fixes the typo of data to datac (case in point, datac from your answer and the OP code with typo fixed works fine). I'm not saying your answer was without value, quite the opposite, and often that's how (new) programmers learn: different approaches to data problems. I also think undeleting your answer holds value, too, it is certainly not irrelevant and I never intended to suggest that. — r2evans 47 secs ago

I added the documentation description for the method to your question so that other C# programmers don't have to go and find it by themselves. — John 49 secs ago

@Prune My apologies, I thought this fit the "software tools commonly used by programmers" but did not read the Still Considered Off-Topic section closely enough as I was interested in finding a software library. But I really appreciate the keyword help!!! It helps more than you would imagine! — Greencoffee 10 secs ago

@RubberBee I can see how it would quickly turn bureaucratic and burdensome if you integrate MISRA-C deviations in the regular quality control system. Better to have a technical coding standard written by/for the programmers only, and collect all company-wide allowed deviations there. — Lundin 33 secs ago

a quote from Martin Fowler: “Any fool can write code that a computer can understand. Good programmers write code that humans can understand.” — JDansercoer 50 secs ago

@Lundin You are right. That would be the logical thing to do. I envy you if you work in an environment in which the logical thing is what rules decisions and where this kind of bureaucracy happens within one programmers life time. A little exaggeration here... I think, because of my repeated example of confidently documenting and sticking with the code has achieved an implicit general permission by now... — RubberBee 36 secs ago

@CaiusJard As a blanket statement I don't think that's correct, as you can see in the above code the object is created within (for example) GetChanges. I know that pointers are "evil" for a lot of programmers, but IMO they have their place, especially when it makes the code cleaner, more robust, easier to understand, and easier to maintain. I don't want my code to be fragile and 5x the size because of some ideological reason. I don't think this is the place for that debate anyway. — user-63873687 1 min ago

@Steve_Corrin Undefined behaviour is undefined. It can seem to work. It's still invalid code. Indexing at elements that don't exist within the < size() of the container is not allowed. They do not exist there, by the definition of the language. If your compiler decides not to launch the nukes and insteads just pokes/peeks RAM in the way you want it to, that's just good luck. Or bad luck, I guess; ideally we could catch all invalid things all programmers would do, but good luck ever getting there! — underscore_d 45 secs ago

The compiler uses a warning in the case of stderr because it implies a macro that makes a function call (the new stdio library is thread safe). The compiler doesn't emit any warning because at compilation time it doesn't know if the external function calls of printf() or stderr will have collateral effects, so it doesn't emit a warning, while something like 0; or any constant expression would. But it is not an error. It could be the result of some programmer's idiom in a macro expansion. So In my opinion, having all those warnings active only confounds novel programmers, ... — Luis Colorado 44 secs ago

StackOverflow is not the place for library recommendations, as explicitly stated in the help center. You might consider posting your question on the software recommendation stack exchange — Nino Filiu 15 secs ago

@ChristiaanWesterbeek You are software engineer you understand that const one = 1; const two = 2; alert(one + two) yields same result as alert(1+2). If not, I am sorry, but most of us do not need really specific answer but a small nudge to understand the concept and extract what we need. — noitse 53 secs ago

Welcome to Stack Overflow. Please read Open Letter to Students with Homework Problems. You can't just dump your problem statement here and expect us to do it for you. It's also a good idea to take the tour, read about what's on-topic in the help center, and How to Ask. — Chris 44 secs ago

Welcome to Stack Overflow. Please read Open Letter to Students with Homework Problems. You can't just dump your problem statement here and expect us to do it for you. It's also a good idea to take the tour, read about what's on-topic in the help center, and How to Ask. — Chris 13 secs ago

well, its says "a practical, answerable problem that is unique to software development" and i am a software engineer that need this answer — 2 7182818 just now

that's just a stupid rule how the fuck are people seeking advise on what library to use for a specific task do, having a rule telling people to not ask a question like that, then i know i will never use stack overflow again, do to their bad rules and even more fucked up admins, why that is a rule, new programmers that needs to do somethings generally don't know what lib they should use, also there isn't a good way to find a library, it isn't that easy to just search it up, i have used more than 2 months just trying to find the answer & now trying to ask other people for advise & not allowed? — matsaa93 56 secs ago

@ModusTollens That is not quite accurate, for it gives instructions on how to search as well as resources that are useful in general, not simply links or references. For instance, it instructs on how to search "#define" , namely with a "hash define", which may not be obvious to new programmers. The instructions are general and can be used for the programmer in the future. I use such methods myself when solving problems. — MelvinWM 32 secs ago

It's very difficult to be confident with an answer without representative data, certainly. Often it's enough to give a nudge in one direction, many programmers can take the incomplete or imperfect-fit answer and adapt (given clues and data that we don't have). I try to answer when I can, but I also encourage askers with clear guidance (such as links to popular "good questions" hints, such as stackoverflow.com/q/5963269, minimal reproducible example, and stackoverflow.com/tags/r/info). After that, it's a horse-to-water thing, and I feel I can shrug it off and hope they can get their help somewhere. — r2evans 42 secs ago

I'm not sure, but I think you might get a better response at Software Recommendations — user 1 min ago

This may or may not be to do with this, but the coordinate systems in OpenGL and DirectX are different: softwareengineering.stackexchange.com/questions/17519/… — rhughes 33 secs ago

MRE is a must. The more blanks we have to fill in to duplicate your problem the more likely we are to avoid whatever mistake caused your problem. Plus the more assumptions we need to make in answers, the less likely the answers will have an obvious connection connection to the question, resulting in a Q&A that is opaque to future programmers with a similar problem. — user4581301 43 secs ago

You can try asking at Software Recommendations but the main problem is that while XML defines comments as part of its structure, YAML only defines them as part of the representation and thus, most YAML implementations do not provide a way of generating YAML output with comments (since they are not part of the structure given to the representer). — flyx 52 secs ago

This is an XY problem description in my opinion. I think it would be more useful for you and all programmers who want to help you to write why you need to send text to standard input of the command process which is processing the batch file kafka-console-producer.bat. (The colon in file name must be a mistake.) Does the batch file kafka-console-producer.bat not support parameters? What do you want to send to this batch file? What is the code of this batch file? — Mofi 54 secs ago

"Thank you for your answer." It was a comment (OK comments) not an answer. "In class, we actually have to do it in two separate programs" I am guessing by 'programs' you mean 'classes'. Point (4) describes a situation where there are still 2 classes. "Is there a way to do it without Swing?" Sure, just not one you are likely to get help with. Many of the newer programmers here have never had experience with AWT. Most people here who could have helped with an AWT problem a) could not be bothered or b) have forgotten so much about AWT they'd make basic mistakes. — Andrew Thompson 5 secs ago