c: react

c/react/HELP.md

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+# Help
+
+## Running the tests
+
+Get the first test compiling, linking and passing by following the [three rules of test-driven development][3-tdd-rules].
+
+The included makefile can be used to create and run the tests using the `test` task.
+
+```console
+$ make test
+```
+
+Create just the functions you need to satisfy any compiler errors and get the test to fail.
+Then write just enough code to get the test to pass.
+Once you've done that, move onto the next test.
+
+As you progress through the tests, take the time to refactor your implementation for readability and expressiveness and then go on to the next test.
+
+Try to use standard C99 facilities in preference to writing your own low-level algorithms or facilities by hand.
+
+## Checking for memory leaks
+
+The makefile comes also with a build that checks some common mistakes regarding memory leaks and out of bound access to arrays.
+To run these checks, use the following at the command line:
+
+```console
+$ make memcheck
+```
+
+[3-tdd-rules]: https://blog.cleancoder.com/uncle-bob/2014/12/17/TheCyclesOfTDD.html
+
+## Submitting your solution
+
+You can submit your solution using the `exercism submit react.c react.h` command.
+This command will upload your solution to the Exercism website and print the solution page's URL.
+
+It's possible to submit an incomplete solution which allows you to:
+
+- See how others have completed the exercise
+- Request help from a mentor
+
+## Need to get help?
+
+If you'd like help solving the exercise, check the following pages:
+
+- The [C track's documentation](https://exercism.org/docs/tracks/c)
+- The [C track's programming category on the forum](https://forum.exercism.org/c/programming/c)
+- [Exercism's programming category on the forum](https://forum.exercism.org/c/programming/5)
+- The [Frequently Asked Questions](https://exercism.org/docs/using/faqs)
+
+Should those resources not suffice, you could submit your (incomplete) solution to request mentoring.
+
+Make sure you have read the [C track-specific documentation][c-track] on the Exercism site.
+This covers the basic information on setting up the development environment expected by the exercises.
+
+## Submitting Incomplete Solutions
+
+If you are struggling with a particular exercise, it is possible to submit an incomplete solution so you can see how others have completed the exercise.
+
+## Resources
+
+To get help if having trouble, you can use the following resources:
+
+- [StackOverflow][] can be used to search for your problem and see if it has been answered already. You can also ask and answer questions.
+- [CPPReference][] can be used to look up information on C concepts, operators, types, standard library functions and more.
+- [TutorialsPoint][] has similar content as CPPReference in its C programming section.
+- [The C Programming][K&R] book by K&R is the original source of the language and is still useful today.
+
+[c-track]: https://exercism.org/docs/tracks/c
+[stackoverflow]: http://stackoverflow.com/questions/tagged/c
+[cppreference]: https://en.cppreference.com/w/c
+[tutorialspoint]: https://www.tutorialspoint.com/cprogramming/
+[K&R]: https://www.amazon.com/Programming-Language-2nd-Brian-Kernighan/dp/0131103628/

c/react/README.md

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+# React
+
+Welcome to React on Exercism's C Track.
+If you need help running the tests or submitting your code, check out `HELP.md`.
+
+## Instructions
+
+Implement a basic reactive system.
+
+Reactive programming is a programming paradigm that focuses on how values are computed in terms of each other to allow a change to one value to automatically propagate to other values, like in a spreadsheet.
+
+Implement a basic reactive system with cells with settable values ("input" cells) and cells with values computed in terms of other cells ("compute" cells).
+Implement updates so that when an input value is changed, values propagate to reach a new stable system state.
+
+In addition, compute cells should allow for registering change notification callbacks.
+Call a cell’s callbacks when the cell’s value in a new stable state has changed from the previous stable state.
+
+## Source
+
+### Created by
+
+- @petertseng
+
+### Contributed to by
+
+- @bcc32
+- @Gamecock
+- @h-3-0
+- @patricksjackson
+- @QLaille
+- @ryanplusplus
+- @wolf99