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This article mainly introduces "how to use initialization seed and unfold iterative function to generate list". In daily operation, I believe many people have doubts about how to use initialization seed and unfold iterative function to generate list. Xiaobian consulted all kinds of information and sorted out simple and easy-to-use methods of operation. I hope it will be helpful for you to answer the question of "how to use initialization seed and unfold iterative function to generate list". Next, please follow the editor to study!

1. The unfold function accepts the iterative function and initializes the seed to generate a list.

To iterate over the function fn, you must always return a list of two elements [value,nextSeed], or return False to terminate the builder function.

2. The builder fn_generator is defined internally in the unfold of the function.

The builder uses a while loop to call the iterator function and generate a value until it returns False. Finally, through the list export, the list generated by the generating function is returned.

The builder is a simple but powerful tool for creating iterators. It is written in a similar way to a standard function, but uses the yield statement when returning data. Whenever you call next () on the generator, it resumes execution from where it last ran (it remembers all the data values from the last time the statement was executed).

Fn_generator is a value used to return val [0] in the current while loop using yield at the end of the while statement. On the next call, the next loop continues, returning the value of val [0] in the next loop until the iterative function fn returns false to end the while loop.

For the return statement of the unfold function, use the list export to call the fn_generator generator until the generator exits, forms a list, and returns.

At this point, the study on "how to use the initialization seed and unfold iterative function to generate a list" is over. I hope to be able to solve your doubts. The collocation of theory and practice can better help you learn, go and try it! If you want to continue to learn more related knowledge, please continue to follow the website, the editor will continue to work hard to bring you more practical articles!

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