quin - time #29
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quin - time #29
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CheezItMan
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Apr 2, 2020
CheezItMan
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CheezItMan
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Good work, you hit most of all the learning goals here. Well done.
Take a look at my comments and let me know if you have any questions.
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| def intersection(list1, list2) | |||
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This works, but it's O(n * m) in time complexity. Using a hash you can get this to O(n + m) time complexity which is much better.
I encourage you to think about how to do this.
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| def palindrome_permutation?(string) | |||
| string2 = string2.split("") | ||
| hash = {} | ||
| string1.each do |char| | ||
| hash[char] = true |
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You would do better to count the number of times each letter appears.
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| def permutations?(string1, string2) | |||
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This doesn't quite work, for example it would fail for heelo and hello. See my note below.
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