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Rewrite remove_list_redundancies based on (ordered) dicts

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This commit is contained in:
Grant Sanderson 2022-04-25 10:45:35 -07:00
parent 4c1210b3ab
commit b920e7be7b
1 changed files with 3 additions and 10 deletions
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13
manimlib/utils/iterables.py
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@ -13,19 +13,12 @@ if TYPE_CHECKING:
S = TypeVar("S")
def remove_list_redundancies(l: Iterable[T]) -> list[T]:
def remove_list_redundancies(lst: Iterable[T]) -> list[T]:
"""
Used instead of list(set(l)) to maintain order
Keeps the last occurrence of each element
"""
reversed_result = []
used = set()
for x in reversed(l):
if x not in used:
reversed_result.append(x)
used.add(x)
reversed_result.reverse()
return reversed_result
return list(reversed(dict.fromkeys(reversed(lst))))
def list_update(l1: Iterable[T], l2: Iterable[T]) -> list[T]:
@ -33,7 +26,7 @@ def list_update(l1: Iterable[T], l2: Iterable[T]) -> list[T]:
Used instead of list(set(l1).update(l2)) to maintain order,
making sure duplicates are removed from l1, not l2.
"""
return [e for e in l1 if e not in l2] + list(l2)
return remove_list_redundancies([*l1, *l2])
def list_difference_update(l1: Iterable[T], l2: Iterable[T]) -> list[T]: