The usage of hash table in layman's

1. hash table (hash table) is also a hash list, which is a data structure directly accessed according to the key code value (Key,value).
That is, it accesses records by mapping key code values to a location in the table to speed up the search.
2. Given table M, there is a function f (key), for any given keyword value key, after substituting the function, if you can get the address of the record in the table containing the key word,
The table M is a hash (hash) table, and the function f (key) is a hash (hash) function, also known as a hash function.

The usage of hash table in layman's