Fixed? clear solution for Frogs Collision by StefanPochmann - python coding challenges

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Fixed? solution in Clear category for Frogs Collision by StefanPochmann

from operator import sub

def frogs_collision(frog1, frog2):
    x, y, dx, dy = map(sub, frog1, frog2)
    t = (dx and x // dx) or (dy and y // dy) or -1
    if t * dx == x and t * dy == y and t < 0:
        return -t

April 20, 2024

Comments:

dan_rue on April 25, 2024, 7:57 p.m.
Very nice! Thanks for reminding me that map can take more than one iterable.

StefanPochmann on April 25, 2024, 10:34 p.m.
I'm still annoyed that it doesn't also take less than one iterable :-(

dan_rue on April 26, 2024, 8:54 p.m.
What would that be good for?

StefanPochmann on April 27, 2024, 12:12 p.m.
This is a good opportunity for me to ask you. Imagine the signature was `map(function, iterables)` so that it *could be called with any number of iterables. How would you describe its behavior in general (for any number of iterables)?

StefanPochmann on April 29, 2024, 9:11 p.m.
To be clear: That's not just me giving you an exercise. I'm interested in that experiment and you'd be doing me a favor. Alternatively, instead of describing the behavior, write an implementation.

dan_rue on April 30, 2024, 8:09 p.m.
Not sure, but maybe imagine instead of just running the function with the given elements of the iterables (lists), it would 'inject' that function into the list as well. If you later append an element to the list, the element would first be run by that function before it is added to the list. Without any Interable, it would return an empty list (or lists, depending on the number of parameters the function needs) with that fuction injected. That function could also be changed later on. Maybe something like that? :D Should be easy to implement with an object that keeps track of the injected function and the list(s). If you have more than one list, it should cache the appended elements until all lists have an additional element it can run that function on.

StefanPochmann on May 1, 2024, 10:50 a.m.
Not sure what you mean with "inject", but this all sounds like you want to change the general functionality a lot, especially allowing to change the function and somehow using new elements before appending them to the iterables. That's quite out-of-scope. I really just meant like the current `map`, just allowing any number of iterables. A generator could be a simple implementation.

Mine

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