notes of extendible hash table

References

• https://www.geeksforgeeks.org/extendible-hashing-dynamic-approach-to-dbms/

  examples walkthrough in detail

• https://medium.com/@redixhumayun/visualising-extendible-hash-tables-c582cf9e980e
  locking

• http://delab.csd.auth.gr/papers/ExtendibleHashing2017.pdf
  short paper

• implementation
  my bustub commit 5a9c0236e8df8b7531ceb95be2a5d94846e70a32
  winter-loo/bustub (private repo, only for myself reference)