sort
β’ 145 words β’ 1 min
python
a = [2, 3, 1]
assert sorted(a) == [1, 2, 3]
assert a == [2, 3, 1]
a.sort()
assert a == [1, 2, 3]
a = [2, 3, 1]
assert list(sorted(a)) == [1, 2, 3]
a = ["1", 2]
try:
a.sort()
assert False
except Exception:
...
# lexicographic
a = ["21", "3"]
assert sorted(a) == ["21", "3"]
assert(sorted(["21", "1"])) == ["1", "21"]
assert sorted([1, 2, 3], reverse=True) == [3, 2, 1]
assert sorted([1, 2, 3][::-1], reverse=True) == [3, 2, 1]
assert sorted([1, 2, 3][slice(None, None, -1)], reverse=True) == [3, 2, 1]
assert sorted([1, 2, 3], key=lambda x: -x) == [3, 2, 1]
a = [2, 3, 1]
assert a.sort(key=lambda x: -x) is None
assert a == [3, 2, 1]
def neg(x):
return -x
assert sorted([1, 2, 3], key=neg) == [3, 2, 1]
a = ["21", "3"]
assert sorted(a, key=lambda s: len(s)) == ["3", "21"]