22 lines
474 B
Markdown
22 lines
474 B
Markdown
---
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title: Find matching value
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type: snippet
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language: python
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tags: [list]
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cover: angry-waves
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dateModified: 2020-11-02T19:27:53+02:00
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---
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Finds the value of the first element in the given list that satisfies the provided testing function.
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- Use a list comprehension and `next()` to return the first element in `lst` for which `fn` returns `True`.
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```py
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def find(lst, fn):
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return next(x for x in lst if fn(x))
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```
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```py
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find([1, 2, 3, 4], lambda n: n % 2 == 1) # 1
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```
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