23 lines
535 B
Markdown
23 lines
535 B
Markdown
---
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title: Test if every list element is truthy
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tags: list
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expertise: intermediate
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cover: blog_images/walking.jpg
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firstSeen: 2019-08-20T11:34:24+03:00
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lastUpdated: 2020-11-02T19:27:53+02:00
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---
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Checks if the provided function returns `True` for every element in the list.
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- Use `all()` in combination with `map()` and `fn` to check if `fn` returns `True` for all elements in the list.
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```py
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def every(lst, fn = lambda x: x):
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return all(map(fn, lst))
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```
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```py
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every([4, 2, 3], lambda x: x > 1) # True
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every([1, 2, 3]) # True
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```
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