Unordered Map (C )
Unordered map can refer to: * Unordered associative containers (C++) * Hash table * Associative array In computer science, an associative array, key-value store, map, symbol table, or dictionary is an abstract data type that stores a collection of (key, value) pairs, such that each possible key appears at most once in the collection. In math ...

Unordered Associative Containers (C++)
Nan or NAN may refer to: Places China * Nan County, Yiyang, Hunan, China * Nan Commandery, historical commandery in Hubei, China Thailand * Nan province ** Nan, Thailand, the administrative capital of Nan province * Nan River People Given name *Nan A. Talese (born 1933), American retired editor *Nan Achnas (born 1963), Indonesian film director *Nan Agle (1905–2006), American children's book writer *Nan Allely, Irish former lawn- and indoor bowler *Nan Aron (born 1948), American lawyer *Nan Aspinwall (1880–1964), American oriental dancer, horsewoman, sharpshooter, and roper *Nan Aye Khine (born 1976), Burmese weightlifter *Nan B. Frank (1886–1980), American social worker and women's suffrage leader *Nan Baird (1911–1993), Scottish amateur golfer *Nan Baker (born 1954), American Republican politician *Nan Bangs McKinnell (1913–2012), American ceramicist and educator *Nan Bentzen Skille (born 1945), Norwegian biographer and columnist *Nan Bernstein Ratner, American profes ...
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Hash Table
In computer science, a hash table is a data structure that implements an associative array, also called a dictionary or simply map; an associative array is an abstract data type that maps Unique key, keys to Value (computer science), values. A hash table uses a hash function to compute an ''index'', also called a ''hash code'', into an array of ''buckets'' or ''slots'', from which the desired value can be found. During lookup, the key is hashed and the resulting hash indicates where the corresponding value is stored. A map implemented by a hash table is called a hash map. Most hash table designs employ an Perfect hash function, imperfect hash function. Hash collision, Hash collisions, where the hash function generates the same index for more than one key, therefore typically must be accommodated in some way. In a well-dimensioned hash table, the average time complexity for each lookup is independent of the number of elements stored in the table. Many hash table designs also ...
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