30-seconds-of-code/snippets/bifurcate.md

title, tags, cover, firstSeen, lastUpdated

title	tags	cover	firstSeen	lastUpdated
Bifurcate list based on values	list	mug-flower-book	2019-08-20T12:37:06+03:00	2020-11-02T19:27:07+02:00

Splits values into two groups, based on the result of the given filter list.

• Use a list comprehension and zip() to add elements to groups, based on filter.
• If filter has a truthy value for any element, add it to the first group, otherwise add it to the second group.

def bifurcate(lst, filter):
  return [
    [x for x, flag in zip(lst, filter) if flag],
    [x for x, flag in zip(lst, filter) if not flag]
  ]

bifurcate(['beep', 'boop', 'foo', 'bar'], [True, True, False, True])
# [ ['beep', 'boop', 'bar'], ['foo'] ]