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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 keys to 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…

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Delete
Θ(1)
Insert
Θ(1)
Invented
1953
Operation
Average
Search
Θ(1)
Space
Θ(n)

Topics to explore

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Overview

History

Hash function

Collision resolution

Dynamic resizing

Performance

Applications

Implementations

Advanced semantic analysis

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Map overview Semantic statistics

Hash table

Nodes142
Edges141
Triples85
Avg. degree1.99
Density0.014085
Components1

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Hash table

Top relations

related to Implementations · 18
Hash table → Aside, ECMAScript, Go's, HashMap, HashSetas, In JavaScript, Java, JavaScript, LinkedHashSet, Many, NET, Python's, Ruby, Ruby's, Rust, Rust Standard Library, The, VB
related to Alternatives to all-at-once rehashing · 10
Hash table → Add, Clean, Delete, Get, If, In, Lookup, Some, Table, The
related to External links · 10
Hash table → Algorithms, Chapter, Data Structures, Hash Tables, Hashing, MIT OCW, NIST, Pat MorinMIT's Introduction, Video, VideoMIT's Introduction
related to overview · 7
Hash table → An, At, Hash, In, Storing, The, Under
related to Performance · 5
Hash table → However, If, In, The, Theta
related to Separate chaining · 5
Hash table → Collision, If, In, Let, The
related to Associative arrays · 2
Hash table → Hash, They
related to Caches · 2
Hash table → Hash, In
related to Database indexing · 2
Hash table → B-trees, Hash
related to Dynamic resizing · 2
Hash table → If, Repeated

Important terminology Word statistics

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Important terminology

hash table displaystyle hashing function value key search used open addressing load chaining array time factor tables also bucket buckets

Entity relationships Subject–Predicate–Object triples

SubjectPredicateObjectConfidenceSrc
Hash tableDeleteΘ(1)1.00infobox
Hash tableInsertΘ(1)1.00infobox
Hash tableInvented19531.00infobox
Hash tableOperationAverage1.00infobox
Hash tableSearchΘ(1)1.00infobox
Hash tableSpaceΘ(n)1.00infobox
Hash tableTime complexity in big O notationTime complexity in big O notationOperation Average Worst caseSearch Θ(1) O(n)[a]Insert Θ(1) O(n)Delete Θ(1) O(n)Space complexitySpace Θ(n) O(n)1.00infobox
Hash tableTypeUnordered associative array1.00infobox
Hash tableis adata structure that implements an associative array0.90text
linear probinginstance ofA number of K-independence results are known for collision resolution schemes0.80text
cuckoo hashinginstance ofA number of K-independence results are known for collision resolution schemes0.80text
using a self-balancing binary search treeinstance ofconcepts0.80text

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    Min side: 3
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