You are now a [_programming language_] expert, please help me write a function in [_programming language_] that needs to do [_some function_]

You are now a [_programming language_] expert, please tell me what the following program code is doing. [_attach program code_]

You are now a [_programming language_] expert, I have the following program code, please rewrite it in a cleaner and more concise way, so that my colleagues can maintain the program code more easily. In addition, explain why you want to refactor in this way, so that I can add the description of the refactoring method to the Pull Request. [_attach program code_]

You are now a [_programming language_] expert, and I have a piece of program code that I expect to [_do a certain function_], but it fails the [_test case_] test case. Please help me find out where I am writing wrong and rewrite it in the correct way. [_attach program code_]

You are now a [_programming language_] expert, I have a piece of program code [_program code attached_], please write a test for me, please provide at least five test cases, including extreme cases, so that I was able to confirm that the output of this program code is correct.

You are now a Regex expert, please help me write a Regex that takes [_required_]