Concise algorithm speedy solution for Sort by Extension by Igor_Sekretarev - python coding challenges

Enable Javascript in your browser and then refresh this page, for a much enhanced experience.

Concise algorithm solution in Speedy category for Sort by Extension by Igor_Sekretarev

from typing import List, Tuple


def extension_and_name(filename: str) -> Tuple[str]:
    i = filename.rfind('.')
    if i <= 0:
        return ('', filename)
    return (filename[i+1:], filename[:i])


def sort_by_ext(files: List[str]) -> List[str]:
    files.sort(key=extension_and_name)
    return files


if __name__ == '__main__':
    print("Example:")
    print(sort_by_ext(['1.cad', '1.bat', '1.aa']))

    # These "asserts" are used for self-checking and not for an auto-testing
    assert sort_by_ext(['1.cad', '1.bat', '1.aa']) == ['1.aa', '1.bat', '1.cad']
    assert sort_by_ext(['1.cad', '1.bat', '1.aa', '2.bat']) == ['1.aa', '1.bat', '2.bat', '1.cad']
    assert sort_by_ext(['1.cad', '1.bat', '1.aa', '.bat']) == ['.bat', '1.aa', '1.bat', '1.cad']
    assert sort_by_ext(['1.cad', '1.bat', '.aa', '.bat']) == ['.aa', '.bat', '1.bat', '1.cad']
    assert sort_by_ext(['1.cad', '1.', '1.aa']) == ['1.', '1.aa', '1.cad']
    assert sort_by_ext(['1.cad', '1.bat', '1.aa', '1.aa.doc']) == ['1.aa', '1.bat', '1.cad', '1.aa.doc']
    assert sort_by_ext(['1.cad', '1.bat', '1.aa', '.aa.doc']) == ['1.aa', '1.bat', '1.cad', '.aa.doc']
    print("Coding complete? Click 'Check' to earn cool rewards!")

April 25, 2021

Comments:

oleg.sidorov.ds on Sept. 2, 2023, 1:33 p.m.
Sorting order: files without name, files without extension, files with name and extension; Filename ".config" or "config." is all name with an empty extension; Ok... <ul> <li>".config" – empty extension (second priority)</li> <li>".www" – empty name (first priority)</li> </ul> This solution gives: `sortbyext(['.config', '.www'])` `['.config', '.www']` – that's wrong result

List but not the least

0 %

You ClassRoom Demo is Ready With the new tool CheckiO ClassRoom, you will be able to analyze your students' progress, have your own leaderboard, change missions order on the map, and so on.