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All topics›JavaScript›Sliding window

Find All Anagrams in a String

intermediatelayer B5 · Sliding window5 tests

Write findAnagrams(s, p) returning, in ascending order, every start index in s where a substring of length p.length is an anagram of p.

  • Matches may overlap
  • Return an empty array when there are none, or when p is longer than s
  • Re-sorting every window is too slow — reuse the previous window's work

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