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1119. Remove Vowels from a String

  • Time: $O(n)$
  • Space: $O(1)$
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class Solution {
 public:
  string removeVowels(string s) {
    s.erase(remove_if(s.begin(), s.end(), [&](char c) { return isVowel(c); }),
            s.end());
    return s;
  }

 private:
  bool isVowel(char c) {
    static constexpr string_view kVowels = "aeiou";
    return kVowels.find(c) != string_view::npos;
  }
};

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class Solution {
  public String removeVowels(String s) {
    return s.replaceAll("[aeiou]", "");
  }
}

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class Solution:
  def removeVowels(self, s: str) -> str:
    return re.sub('a|e|i|o|u', '', s)