22 lines
592 B
Markdown
22 lines
592 B
Markdown
---
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title: bifurcate
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tags: list,intermediate
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---
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Splits values into two groups.
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If an element in `filter` is `True`, the corresponding element in the collection belongs to the first group; otherwise, it belongs to the second group.
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- Use list comprehension and `zip()` to add elements to groups, based on `filter`.
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```py
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def bifurcate(lst, filter):
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return [
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[x for x, flag in zip(lst, filter) if flag],
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[x for x, flag in zip(lst, filter) if not flag]
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]
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```
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```py
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bifurcate(['beep', 'boop', 'foo', 'bar'], [True, True, False, True]) # [ ['beep', 'boop', 'bar'], ['foo'] ]
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```
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