When.com Web Search

Search results

  1. Results From The WOW.Com Content Network
  2. Hash table - Wikipedia

    en.wikipedia.org/wiki/Hash_table

    Therefore an open-addressed hash table cannot have a load factor greater than 1. [11] The performance of open addressing becomes very bad when the load factor approaches 1. [10] Therefore a hash table that uses open addressing must be resized or rehashed if the load factor approaches 1. [10]

  3. Open addressing - Wikipedia

    en.wikipedia.org/wiki/Open_addressing

    Hash collision resolved by linear probing (interval=1). Open addressing, or closed hashing, is a method of collision resolution in hash tables.With this method a hash collision is resolved by probing, or searching through alternative locations in the array (the probe sequence) until either the target record is found, or an unused array slot is found, which indicates that there is no such key ...

  4. Linear probing - Wikipedia

    en.wikipedia.org/wiki/Linear_probing

    Linear probing is a component of open addressing schemes for using a hash table to solve the dictionary problem.In the dictionary problem, a data structure should maintain a collection of key–value pairs subject to operations that insert or delete pairs from the collection or that search for the value associated with a given key.

  5. Cuckoo hashing - Wikipedia

    en.wikipedia.org/wiki/Cuckoo_hashing

    Using just 2 keys per bucket permits a load factor above 80%. [8] Another variation of cuckoo hashing that has been studied is cuckoo hashing with a stash. The stash, in this data structure, is an array of a constant number of keys, used to store keys that cannot successfully be inserted into the main hash table of the structure.

  6. Double hashing - Wikipedia

    en.wikipedia.org/wiki/Double_hashing

    Double hashing is a computer programming technique used in conjunction with open addressing in hash tables to resolve hash collisions, by using a secondary hash of the key as an offset when a collision occurs. Double hashing with open addressing is a classical data structure on a table .

  7. Quadratic probing - Wikipedia

    en.wikipedia.org/wiki/Quadratic_probing

    Quadratic probing is an open addressing scheme in computer programming for resolving hash collisions in hash tables. Quadratic probing operates by taking the original hash index and adding successive values of an arbitrary quadratic polynomial until an open slot is found. An example sequence using quadratic probing is: +, +, +, +,...

  8. Hopscotch hashing - Wikipedia

    en.wikipedia.org/wiki/Hopscotch_hashing

    One advantage of hopscotch hashing is that it provides good performance at very high table load factors, even ones exceeding 0.9. Part of this efficiency is due to using a linear probe only to find an empty slot during insertion, not for every lookup as in the original linear probing hash table algorithm. Another advantage is that one can use ...

  9. Universal hashing - Wikipedia

    en.wikipedia.org/wiki/Universal_hashing

    For any fixed set of keys, using a universal family guarantees the following properties.. For any fixed in , the expected number of keys in the bin () is /.When implementing hash tables by chaining, this number is proportional to the expected running time of an operation involving the key (for example a query, insertion or deletion).