30 lines
714 B
Markdown
30 lines
714 B
Markdown
---
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title: Check if two iterables are permutations of each other
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shortTitle: Iterable permutations
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type: snippet
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language: python
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tags: [list,string]
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cover: apples
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dateModified: 2023-05-23T10:48:03+03:00
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---
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Check if two iterables are permutations of each other.
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- Use `len` to check if both iterables have the same length.
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- Use `Counter` to verify that each element appears an equal number of times in both iterables.
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```py
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from collections import Counter
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def is_perm(items0, items1):
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return len(items0) == len(items1) and Counter(items0) == Counter(items1)
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```
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```py
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is_perm([1, 2, 3], [4, 1, 6]) # False
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is_perm([1, 2], [2, 1]) # True
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is_perm("dad", "add") # True
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is_perm("snack", "track") # False
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```
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