Enable Javascript in your browser and then refresh this page, for a much enhanced experience.
-items.count() solution in Clear category for Sort Array by Element Frequency by neverm1
def frequency_sort(items):
return sorted(items, key=lambda x: (-items.count(x), items.index(x)))
if __name__ == '__main__':
print("Example:")
print(frequency_sort([17, 99, 42]))
# These "asserts" are used for self-checking and not for an auto-testing
assert list(frequency_sort([4, 6, 2, 2, 6, 4, 4, 4])) == [4, 4, 4, 4, 6, 6, 2, 2]
assert list(frequency_sort(['bob', 'bob', 'carl', 'alex', 'bob'])) == ['bob', 'bob', 'bob', 'carl', 'alex']
assert list(frequency_sort([17, 99, 42])) == [17, 99, 42]
assert list(frequency_sort([])) == []
assert list(frequency_sort([1])) == [1]
print("Coding complete? Click 'Check' to earn cool rewards!")
May 16, 2020
