Why do we need hashCode?

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  1. #collection
  2. #return
  3. #object
  4. #override
  5. #method
  6. #equal
  7. #always
  8. #hashcode
  9. #happen
  10. #means
  11. #class
  12. #hashing
  13. #equals
  14. #because
  15. #based