hash table

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hash table

hash table

A lookup table that is designed to efficiently store non-contiguous keys (account numbers, part numbers, etc.) that may have wide gaps in their alphabetic or numeric sequences.

Hash tables are created with an algorithm that stores the keys into hash buckets, which contain key-value pairs. Since different keys may hash to the same bucket, the goal of hash table design is to spread out the key-value pairs evenly with each bucket containing as few key-value pairs as possible. When an item is looked up, its key is hashed to find the appropriate bucket, and the bucket is then compared to find the right key-value pair. See key-value pair, cryptographic hash function, DHT and hash total.


A Hash Table
When an item is looked up, its key is hashed into a bucket value, and the bucket is compared to find the key.
References in periodicals archive ?
In Cheng, distributed hash tables (DHT) were used for inter routing connection establishment where the internal regions of the network router were connected with common mode point.
After an introduction to Scala, it covers the basics of object-orientation and software development, object-orientation in Scala, abstraction and polymorphism, GUIs (graphical user interfaces) and graphics, other collection types, stacks and queues, multithreading and concurrency, low-level multithreading and Java libraries, stream input/output and XML, networking, linked lists, priority queues, refactoring, recursion, trees, regular expressions and context-free parsers, binary heaps, direct access binary files, spatial trees, augmenting trees, and hash tables.
First to establish a global agreement five yuan group as the hash value of the "session" hash tables, the hash table node points to save the session information and their corresponding agreement number.
2] are applied to hash the vector a and establish hash tables for saving data points.
Here, by computing the Hamming distance, we propose a new structure, called Similar-PBF-PHT, based on the BFs and hash tables (HT) to search the membership as well as the K-NN regardless of the radius CR.
SHJ can produce a result before reading either input relation entirely, however, the algorithm keeps both the hash tables, required for each input, in memory.
After a brief introduction to Java, it covers algorithm analysis, integer stacks, generic stacks, queues, lists, recursion, trees, binary search trees, heaps, and hash tables.
Our approach, based on Distributed Hash Tables, allows complex queries to the system by means of complex multimedia metadata indexing.
The top-level data structure is an instance of the Mission-Builder class, containing a hash table for the overall mission data and four additional hash tables holding the sets of event, leg, sortie and movement data structures.
The result is a system that's not only useful for sharing data between applications, but also for replacing traditional data structures such as hash tables, lists and arrays, and it can even export its data to disk if required.
The indexing approach also provides robust recognition and an efficient storage/retrieval of all the activities in a small set of hash tables.
1998] and binary search on hash tables [Waldvogel et al.