[Check-IO] Absolute Sorting

[1] Problem: https://py.checkio.org/en/mission/absolute-sorting/

[2] Solution

def checkio(values: list) -> list:
    # your code here
    abs_sorted = sorted([abs(n) for n in values])
    answers = []
    for n in range(len(abs_sorted)):
        if not abs_sorted[n] in values: answers.append(- abs_sorted[n])
        else: answers.append(abs_sorted[n])
 
    return answers


if __name__ == '__main__':
    print("Example:")
    print(checkio([-20, -5, 10, 15]))

    # These "asserts" are used for self-checking and not for an auto-testing
    assert checkio([-20, -5, 10, 15]) == [-5, 10, 15, -20]
    assert checkio([1, 2, 3, 0]) == [0, 1, 2, 3]
    assert checkio([-1, -2, -3, 0]) == [0, -1, -2, -3]
    print("Coding complete? Click 'Check' to earn cool rewards!")

 

[3] Best Solutions

def checkio(numbers_array):
    """
    The magic of the key :)
    """
    return tuple(sorted(numbers_array, key=abs))

1) numbers_array를 절대값을 기준(key = abs)으로 정렬함
2) 하지만 왜 tuple을 적용하는지는 잘 모르겠음