Hash Table time complexity in Big O Notation ![]() You'll commonly use a Hash Table because of its fast search, insertion, and delete operations: You can then retrieve a certain value by using the key for that value, which you put into the table beforehand.Ī Hash Table transforms a key into an integer index using a hash function, and the index will decide where to store the key/value pair in memory: Hash table for storing phone books (from Wikipedia) ![]() Hash Tables are a data structure that allow you to create a list of paired values.
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