A hash table is a data structure that stores an arbitrary number of items, mapping keys to values, and uses a hash function to compute an index. The hash table relates the hashed keys to an array of buckets where the associated value can be found. When looking up a value, the provided key is hashed and the resulting hash is used to retrieve the corresponding value.
Hash tables are implemented in many different programming languages such as Java (as a
HashTable or Python (as a dictionary). Hash table implementations typically allow the modification, insertion, and deletion of the contained key-value pairs.
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