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86 lines
3.1 KiB
Markdown
86 lines
3.1 KiB
Markdown
---
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id: 69cfca90e8a0a6d4d6871c4e
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title: "Challenge 264: Anagram Groups"
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challengeType: 29
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dashedName: challenge-264
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---
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# --description--
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Given an array of words, return a 2d array of the words grouped into anagrams.
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- Words are anagrams if they contain the same letters in any order.
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- Each word belongs to exactly one group.
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- Return order doesn't matter.
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For example, given `["listen", "silent", "hello", "enlist", "world"]`, return `[["listen", "silent", "enlist"], ["hello"], ["world"]]`.
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# --hints--
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`group_anagrams(["listen", "silent", "hello", "enlist", "world"])` should return `[["listen", "silent", "enlist"], ["hello"], ["world"]]`.
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```js
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({test: () => { runPython(`
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from unittest import TestCase
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groups = group_anagrams(["listen", "silent", "hello", "enlist", "world"])
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sorted_groups = sorted([sorted(g) for g in groups], key=lambda g: g[0])
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TestCase().assertEqual(sorted_groups, [["enlist", "listen", "silent"], ["hello"], ["world"]])`)
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}})
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```
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`group_anagrams(["eat", "tea", "tan", "ate", "nat", "bat"])` should return `[["ate", "eat", "tea"], ["bat"], ["nat", "tan"]]`.
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```js
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({test: () => { runPython(`
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from unittest import TestCase
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groups = group_anagrams(["eat", "tea", "tan", "ate", "nat", "bat"])
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sorted_groups = sorted([sorted(g) for g in groups], key=lambda g: g[0])
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TestCase().assertEqual(sorted_groups, [["ate", "eat", "tea"], ["bat"], ["nat", "tan"]])`)
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}})
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```
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`group_anagrams(["care", "race", "acre", "pots", "stop", "tops", "opts", "post", "spot", "evil", "vile", "live", "veil"])` should return `[["acre", "care", "race"], ["evil", "live", "veil", "vile"], ["opts", "post", "pots", "spot", "stop", "tops"]]`.
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```js
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({test: () => { runPython(`
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from unittest import TestCase
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groups = group_anagrams(["care", "race", "acre", "pots", "stop", "tops", "opts", "post", "spot", "evil", "vile", "live", "veil"])
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sorted_groups = sorted([sorted(g) for g in groups], key=lambda g: g[0])
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TestCase().assertEqual(sorted_groups, [["acre", "care", "race"], ["evil", "live", "veil", "vile"], ["opts", "post", "pots", "spot", "stop", "tops"]])`)
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}})
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```
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`group_anagrams(["algorithms", "logarithms", "education", "cautioned", "auctioned", "triangle", "integral", "alerting", "relating"])` should return `[["alerting", "integral", "relating", "triangle"], ["algorithms", "logarithms"], ["auctioned", "cautioned", "education"]]`.
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```js
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({test: () => { runPython(`
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from unittest import TestCase
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groups = group_anagrams(["algorithms", "logarithms", "education", "cautioned", "auctioned", "triangle", "integral", "alerting", "relating"])
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sorted_groups = sorted([sorted(g) for g in groups], key=lambda g: g[0])
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TestCase().assertEqual(sorted_groups, [["alerting", "integral", "relating", "triangle"], ["algorithms", "logarithms"], ["auctioned", "cautioned", "education"]])`)
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}})
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```
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# --seed--
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## --seed-contents--
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```py
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def group_anagrams(words):
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return words
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```
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# --solutions--
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```py
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def group_anagrams(words):
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groups = {}
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for word in words:
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key = ''.join(sorted(word))
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if key not in groups:
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groups[key] = []
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groups[key].append(word)
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return list(groups.values())
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```
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