riadwaw's blog

JHelper 0.18
By riadwaw, 10 years ago, In English

Hi, Codeforces.

Changelog:

  • 0.18
    • CopyAction now regenerates output file
  • 0.17
    • Support for inline inlining for topcoder
  • 0.16.4
    • Support for WSL
  • 0.16.3
    • Support CLion 2020.1
  • 0.16.2
    • Support CLion 2019.1
  • 0.16
    • Auto switching to a file when changing task
    • Auto selecting task when changing a file

JHelper is plugin for writing contests in C++. You may inline code from your own prewritten library so that you can submit only used code. Besides, it allows to test on tests you've added. it's planned that you'll be able to parse a problem/contest and have all samples tests automatically added.

It's available for CLion

Plugin is completely free. IDE price is 89$/year, but it's free for students, have 30-days free trial and often you can use EAP(smth like beta)-versions for free.

You may download the plugin using JetBrains plugin repository or manually from their site

Some explanations how to use that on wiki. Fell free to ask what is unclear.

Please post bugs and feature requests here or in bug tracker.

Your contributions are also welcome. Possible ways to contribute:

  • Post bugs or feature requests
  • Make wiki more understandable
  • Implement something and create pull request.

It's still possible to make it multilingual (I mean add another programming languages). I am open to discuss that.

Thanks Egor for idea with his Chelper and Abra for some code review.

Source code | known bugs | bugtacker | instructions

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Comments Comments (105)
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10 years ago, # |
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Code generation is currently broken in public EAP of CLion. issue on GH

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    10 years ago, # ^ |
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    is there any documentation to know how to use it, please.

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    10 years ago, # ^ |
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    Seems to be working now without any fix from me.

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10 years ago, # |
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I was testing and I got a problem, can you help me ?

http://snag.gy/AifUx.jpg

Thanks in advance.

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    10 years ago, # ^ |
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    Did you create output configuration? See wiki for more details.

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10 years ago, # |
  Vote: I like it -16 Vote: I do not like it

CHelper for Java and JHelper for C++. Interesting names :D

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10 years ago, # |
← Rev. 15   Vote: I like it 0 Vote: I do not like it

Hello Alex, Thanks for making such a tool, and I am trying to set it up to use with CLion. I am having trouble setting up the plugin to generate the code. I have tried following the instructions on the wiki but unfortunately I do not fully understand them I think. I get the following error: Task file not found: Seems your task is in inconsistent state If you could provide any help it would be very much appreciated. Thanks again for the time you spent making this tool!

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    10 years ago, # ^ |
    ← Rev. 2   Vote: I like it +6 Vote: I do not like it

    Well, you need to create files that are in those boxes and add them in CMakeLists to appropriate configurations.

    I've created example project where it's seems to work: Link to Github

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      10 years ago, # ^ |
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      Awesome thank you so much for quick response and help! I downloaded the repository and imported it as a new project and everything works now! Have been using java for all my contests so far with Chelper, but can't wait to now to get better at c++ and use it in contest too with your plugin. Again many thanks for your work!

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      10 years ago, # ^ |
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      Also, just one more quick question if you don't mind. In Chelper there is archive button for tasks that one is done with. What is the best way of replicating that workflow in JHelper? Does one just create a folder and then drag the Task.cpp file and Task.task file there when you are done with problem? Thanks!

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        10 years ago, # ^ |
        ← Rev. 2   Vote: I like it +1 Vote: I do not like it

        Probably, right now is the easiest way to do that. I'm going to implement this in more convenient way but I'm afraid it'll happen not very soon. I usually just delete them:)

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          10 years ago, # ^ |
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          Right, makes sense. Just out of curiosity how much work was it to get the plugin to the current state in terms of hours? At some point I would be interested in trying myself to port JHelper/CHelper to PyCharm for use with Python. I imagine it is a decent amount of work to get everything functional, yes?

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            10 years ago, # ^ |
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            Well, it took some time:)

            But I believe it will be easier to port my code to python then Java code to C++.

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10 years ago, # |
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Added parsers from CHelper(currently only parser from IDE, not from Chrome) including CodeForces.

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10 years ago, # |
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Chrome extension supported.

For those who use other browsers (Firefox?): it should be quite easy to write similar extension. Almost no logic is required.

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10 years ago, # |
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Can this be integrated with sublime too?

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    10 years ago, # ^ |
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    I don't think so. It uses API provided by JetBrains IDEs

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10 years ago, # |
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Could you please give me some hints about how can I add a problem / contest, how to solve the problem (coding, testing and submitting) with JHelpr in Clion?
I've study your wiki, but I need more obvious details!
Thanks...

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    10 years ago, # ^ |
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    First of all you should configure project (or you may download example project from github)

    To add new task you need either use "Add Task" (manually add name and tests) action or Parse contest action (parse tests from Online judge). To make them available you should either add them on toolbar/menu or enable shortcuts for them.

    Fro wiki:

    Make possible to call JHelper action. Yo should do one or both of the following:

    • Add icons of actions to menu or toolbar. Click to the toolbar-Customize menus and toolbars-Main menu/toolbar-Add after-Plugins-JHelper-select all
    • Add shortcuts for actions. Preferences-Keymap-Plugins-JHelper

    Then cpp file with class will be created, you should code here. To run you just choose run configuration and run:)

    Feel free to ask for clarification if it's not clear (but it's better to try first all because some actions are harder to explain than to do:) )

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10 years ago, # |
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CLion version 1.0 is released

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10 years ago, # |
← Rev. 6   Vote: I like it 0 Vote: I do not like it

Awesome work! Couple of questions:
1. Does Topcoder work with this?
2. What is the usual workflow? For every problem(or contest I parse), it tries to make it TaskA, so should I delete my TaskA every-time.
3. I keep getting many "IllegalArgumentException: childPath should be inside a parentPath", though nothing breaks.
4. Where to write stress-test code(like brute-force program and tester/generator)?
5. In GCJ contest, if I select multi-tests with number of tests known, how to get test case number?
6. Where to write pre-processing code, common to all test cases.

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    10 years ago, # ^ |
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    Hi

    1. TopCoder is currently not supported. It is in plans but it doesn't really make sense to do it right now while unused coffee elimination is so unstable due to unused code rule
    2. Usually I just delete all tasks between contests. I'm going to do some sort of archivation, but it haven't been done yet.
    3. Could you post stack trace and say when it happens?
    4. Unfortunately there's currently no convenient way to do that. I'm open to your ideas.
      6. You may either put the code in the ctor of solver (and save in member vars) or do that during first function call with static boolean var like
    static bool needcalculate = true;
if(need calculate) {
needcalculate = false;
//calc what you need
}

    The first way is preferable because it will be called for each test (I mean for each test consisting of several test cases).

    5. See 6, you should have testNumber var status either filled by ctor or static var.

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9 years ago, # |
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This is the screenshot: http://postimg.org/image/8gw88dl4b/

This error is on the left side.

C:\Users\Bat-Orgil.clion10\system\cygwin_cmake\bin\cmake.exe --build C:\Users\Bat-Orgil.clion10\system\cmake\generated\cc361857\cc361857\Debug --target all -- -j 4 Scanning dependencies of target output Scanning dependencies of target test Scanning dependencies of target testrunner [ 33%] [ 66%] [100%] Building CXX object CMakeFiles/output.dir/output/main.cpp.o Building CXX object CMakeFiles/test.dir/tasks/TaskA.cpp.o Building CXX object CMakeFiles/testrunner.dir/testrunner/main.cpp.o Linking CXX executable output.exe Linking CXX executable test.exe /usr/lib/gcc/x86_64-pc-cygwin/4.9.3/../../../../lib/libcygwin.a(libcmain.o): In function main': /usr/src/debug/cygwin-2.2.0-1/winsup/cygwin/lib/libcmain.c:39: undefined reference toWinMain' /usr/src/debug/cygwin-2.2.0-1/winsup/cygwin/lib/libcmain.c:39:(.text.startup+0x7f): relocation truncated to fit: R_X86_64_PC32 against undefined symbol `WinMain' collect2: error: ld returned 1 exit status [100%] Linking CXX executable testrunner.exe CMakeFiles/test.dir/build.make:85: recipe for target 'test.exe' failed make[2]: *** [test.exe] Error 1 CMakeFiles/Makefile2:95: recipe for target 'CMakeFiles/test.dir/all' failed make[1]: *** [CMakeFiles/test.dir/all] Error 2 make[1]: *** Waiting for unfinished jobs.... Built target output [100%] Built target testrunner Makefile:75: recipe for target 'all' failed make: *** [all] Error 2

Other side has this error for every 5 seconds.

2:00:54 PM NullPointerException: update failed for AnAction with ID=name.admitriev.jhelper.actions.SwitchCMakeConfigurationAction

I think I have sth wrong with run/debug configuration. Can you check it? Thanks. Let me know if you need any other details.

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    9 years ago, # ^ |
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    First of all, change target (on the setting page opened on the screenshot) from build all to testrunner. If that doesn't help please post content of testrunner/main.cpp

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      9 years ago, # ^ |
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      It works perfectly now. Thanks a lot for your great software! :)

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    9 years ago, # ^ |
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    As for right side: it should not affect anything, but please post stack trace so that I am able to identify the error (click on error message for that)

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9 years ago, # |
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Released support for local regex input type. Tested only on MacOS, should probably work on Linux.

Please let me know if somebody was able to run it under Windows :)

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8 years ago, # |
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Currently it's known not to work correctly with CLion 2016.3, I'll try to fix this ASAP

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    8 years ago, # ^ |
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    Is this fixed? (I have updated CLion to 2016.3 :( )

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      8 years ago, # ^ |
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      Sorry, but not yet and I'm not sure I'll be do that tally quickly

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    8 years ago, # ^ |
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    I've added several fixes, it seems to work now.

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7 years ago, # |
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Is there any way to disable the auto comment system?

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    7 years ago, # ^ |
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    If you mean "code generated" header, no, there's no way to disable it, as far as I remember

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7 years ago, # |
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Note, that CLion 2017.3 is not currently supported

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7 years ago, # |
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Recently when my programs print a lot or the testcase input is large, the program often terminates prematurely (but with exit code 0), only in the CLion (2017.2) run field, not in the Debug terminal... Did anyone else encounter this problem?

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6 years ago, # |
← Rev. 2   Vote: I like it 0 Vote: I do not like it

CLion says,

Error running 'testrunner': Cannot run 'testrunner' on ''

while I am running a TaskX.cpp file after parsing A contes problems.... :(

Link

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    6 years ago, # ^ |
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    Unfortunately last versions of CLion is not (yet) supported. The last supported version is 2017.2 Which version do you use?

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      6 years ago, # ^ |
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      ok...thank you. I'm using the latest version 2018.1.3...About when would we get the latest version support?

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        6 years ago, # ^ |
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        No specific plans now, sorry. When I fight my laziness of when somebody will do it instead of myself

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      6 years ago, # ^ |
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      does it support clion 2017.2.3 ?

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        6 years ago, # ^ |
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        Yes

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          6 years ago, # ^ |
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          is there any crome extensions for parse task?? i found chelper parse task crome extensions but it's not working for jhelper.

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            6 years ago, # ^ |
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            Cheaper plugin should work. Also there is competitive companion

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          6 years ago, # ^ |
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          installation don'e successfully, thanks for your great plugin. is there anyway to save tasks by folders ? each oj has its own folder. or task names become -> "ojName+taskName". can i do any of that?

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            6 years ago, # ^ |
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            I don't think that's doable now. You can move to different folders after you solved probably

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              6 years ago, # ^ |
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              is there anyway to use scanf, and printf instead of in, out ?

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                6 years ago, # ^ |
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                No ( at least no easy way ). Note that when you are testing, it's actually a stringstream. Just add sync_with_stdio(false) and cin.tie (nullptr) and forget about scanf as scary tail.

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    6 years ago, # ^ |
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    Now, this problem is (I believe fixed) with JHelper 0.15 and CLion 2018.2

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6 years ago, # |
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i wrote a small math library in mymath.h and when i used some function i found all the functions written in output file(main.cpp). is there any way to just include the function i called ?

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    6 years ago, # ^ |
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    There's setting that allow to remove unused code, but it doesn't work well, so I don't recommend it.

    You may place them in different headers and then only files you included will be added.

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      6 years ago, # ^ |
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      yes i see eliminate code and reformat code, what does each one do exactly ?

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        6 years ago, # ^ |
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        The first one is trying to eliminate unused code, but it has problems (code can become incorrect). The other is reformatting your code according to coding style configured in IDE (basically the same as clicking ctrl+alt+L.

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          6 years ago, # ^ |
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          the problems with eliminate unused code -> are they because a certain way of coding that i may avoid while i write my code ??

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            6 years ago, # ^ |
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            Well, the main issue is in using templates, e.g like in this issue

            Anyway if you want, you may try it, but be ready to turn it off when you get CE. Probability of having other problems (like getting wrong answer) is rather low.

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              6 years ago, # ^ |
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              so the general tip here is no templates, yeah!

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                6 years ago, # ^ |
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                Well, I don't think "not using templates like std::vector with custom types" is better tip than "not using option to eliminate code" but you may choose what fits you best.

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                  6 years ago, # ^ |
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                  i have a lib that has func1, func2, func3, and i called only func3, but for some reasons that i don't know, i found that func1 and func3 are included in main.cpp but func2 aren't included although there is no call of func1 in func3.

                  do you know why ?

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                  6 years ago, # ^ |
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                  No, not really.

                  My code is pretty straightforward. It just finds all the functions that are unused in generated file according to what CLion reports. So, the most probable problem is that CLion shows some pace where it's used. You may try "find usages" IDE function in generated file to check place where it thinks it's used (because it should use the same mechanism).

                  PS: Honestly, I don't think it's reasonable to spend time investigating why it doesn't work, but you can read the code here

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                  6 years ago, # ^ |
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                  i think i figured the problem.

                  all recursive functions are included even if i didn't use them, and non recursive functions are removed.

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                  6 years ago, # ^ |
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                  That's a reasonable explanation

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                  6 years ago, # ^ |
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                  hope u fix it soon, thanks for your help

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                  6 years ago, # ^ |
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                  I'm ready to review your PR.

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6 years ago, # |
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For everybody interested: (I think) I fixed the problem with new version of CLion. After the plugin moderation version 0.15 should work fine with CLion 2018.2

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6 years ago, # |
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Added some tips&tricks on configuring templates according to your needs.

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6 years ago, # |
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riadwaw Can you please explain me the 4th step in Configuration section? Where is the configuration window? Please explain whole step :)

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    6 years ago, # ^ |
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    If you did step 2, one of the action is called configuration (and its icon is gearwheel)

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6 years ago, # |
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It would be great if you could add a video tutorial for basic setup. Most of the steps are too tough to execute manually.

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    6 years ago, # ^ |
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    I'm afraid I won't be able to do something more understandable then written instructions I already made

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      6 years ago, # ^ |
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      Can you describe some of the advantages of Jhelper. I wanted to know somethings like — can we directly submit from jhelper to codeforces, are testcases automatically fetched from codeforces to clion etc. And also if I face some issues while configuring then where can i get some solutions.

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6 years ago, # |
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please sir make a video ,how to configure it and run it.i cant figure out

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5 years ago, # |
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This is a great Tool!!! Can you tell me how can I remove the comments on the output file?

_/** * code generated by JHelper * More info: https://github.com/AlexeyDmitriev/JHelper * @author */ _

How can I remove these lines? I am using the jhelper-example-project.

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5 years ago, # |
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riadwaw, please, please, please, publish on Youtube a screencast of a creation of sample project for a contest. Instructions would be much more understandable

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5 years ago, # |
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It is saying template 'task' is not found. what could be the problem?

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5 years ago, # |
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Is jhelper plugin supported in clion 2.5 ?

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    5 years ago, # ^ |
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    what is Clion 2.5 ? you mean 2019.2.5? Yes, it should work

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5 years ago, # |
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2020.1 is not supported yet, make sure not to update if you are going to use jhelper

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5 years ago, # |
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Started getting error "Couldn't parse any task: Maybe format changed?" on codeforces only, it is working for codechef though. (Using competitive companion, 2.15.0, Checking on github repo of competitive companion reveals that there have been some changes to codeforces problem parser recently)

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5 years ago, # |
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Would you please make a video tutorial or described elaborately how to configure and use it with an example?

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5 years ago, # |
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Egor added partial support for topcoder in v0.17 (currently under jetbrains premoderation): you still have to test code using other plugin (such as moj), but you can use your library and inline code using new action "Process file"

cc people who asked about topcodet support before: amitsaharana, iensen

PS: a good example how you can add a feature you want.

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    4 years ago, # ^ |
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    riadwaw What new action "Process file" does? Can you show one example please ?

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      4 years ago, # ^ |
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      It inlines all the code in current file (so that if you use library code, the file is ready for submission). it is created to use in cases where you can't (or don't want to) use Tasks directly for example with TopCoder

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        4 years ago, # ^ |
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        riadwaw, is there any wiki how to configure it? I would like to know where those cpps needs to be saved.

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4 years ago, # |
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I was looking around and tried to figure out how to debug using JHelper. I found a closed GitHub issue (https://github.com/AlexeyDmitriev/JHelper/issues/39), and I couldn't figure out how to. If anyone knows how to use the CLion debugger, while using JHelper, I'd appreciate it if you could point me in the right direction. Whenever I added breakpoints, they got skipped over, I tried on my Task.cpp file, testrunner/main.cpp, and output/main.cpp, with their respective configurations, and I couldn't get it working.

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    4 years ago, # ^ |
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    It works for me when I add breakpoints directly in Task.cpp and I click "Debug" button (not "Run" button). You may need to switch to Debug mode so that most of your code is not optimized.

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      4 years ago, # ^ |
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      I think I just configured something wrong, as I’m on Debug, and not Release, and it just skips over breakpoints completely, I think I’m going to try a fresh install of CLion.

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        4 years ago, # ^ |
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        does it work for you for projects and targets unrelated to jhelper?

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          4 years ago, # ^ |
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          Yeah, on my normal non-JHelper projects, it works.

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            4 years ago, # ^ |
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            You can also try to add normaltarget in Jhelper project, e.g add test_debug.cpp and add_executable(test_debug test_debug.cpp) to CMakeLists.txt.

            It it doesn't work for this target, then you probably need to find differences in configuration of toolchain and/or debugger between the projects
            If it does, I have no idea what could be wrong.

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              4 years ago, # ^ |
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              Okay, thank you very much, I’m also going to testing with the sample project, to see if I setup something wrong with CLion overall.

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              4 years ago, # ^ |
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              I replaced my cmake-build-debug with the jhelper-example-projects cmake-build-debug, and modified the required files, and it works nows. Thank you so much!

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                4 years ago, # ^ |
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                I am glad it works now.

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4 years ago, # |
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I want to use clion for free, How to do that, not a varsity student.

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4 years ago, # |
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Using competitive companion, I can make the test case be the sample input. How do I add my own test cases?

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    4 years ago, # ^ |
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    There's "Edit tests" action, where you can do that in UI.

    How to use actions, check wiki

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3 years ago, # |
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Did anyone use JHelper for Topcoder? Do I have to create task manually?

Also please let me know if I should ask in different discussion. Thanks.

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    3 years ago, # ^ |
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    There's no direct topcoder support, but if somebody used it with topcoderz fill free to share your approach

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    3 years ago, # ^ |
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    I used with KawigiEdit, saved source code and opened with Clion (example)

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      3 years ago, # ^ |
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      The problem I'm trying to solve is — how do I create a JHelper task out of this source code (saved by topcoder plugin — KawigiEdit in your case)?

      Could you please share exact steps you follow? Thanks.

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2 years ago, # |
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how to used my debugging template in CLion like how to get its output and where, what changed do I need to do in run.template or anywhere else ?

debugging statements/template
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