17 lines
426 B
Markdown
17 lines
426 B
Markdown
### countOccurences
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Counts the occurrences of a value in an list.
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Uses the `reduce` functin from built-in module `functools` to increment a counter each time you encounter the specific value inside the list.
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```python
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def countOccurences(arr, val):
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return reduce(
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(lambda x, y: x + 1 if y == val and type(y) == type(val) else x + 0),
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arr)
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```
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```python
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countOccurrences([1, 1, 2, 1, 2, 3], 1) # 3
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``` |