Editing Hash table (section)

==Implementations==
Many programming languages provide hash table functionality, either as built-in associative arrays or as [[standard library]] modules.

* In [[JavaScript]], an "object" is a mutable collection of key-value pairs (called "properties"), where each key is either a string or a guaranteed-unique "symbol"; any other value, when used as a key, is first [[Type conversion|coerced]] to a string. Aside from the seven "primitive" data types, every value in JavaScript is an object.<ref>{{cite web |title=JavaScript data types and data structures - JavaScript {{!}} MDN |url=https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#objects |website=developer.mozilla.org |access-date=24 July 2022}}</ref> ECMAScript 2015 also added the <code>Map</code> data structure, which accepts arbitrary values as keys.<ref>{{Cite web |date=2023-06-20 |title=Map - JavaScript {{!}} MDN |url=https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Map |access-date=2023-07-15 |website=developer.mozilla.org |language=en-US}}</ref>
* [[C++11]] includes <code>[[unordered map (C++)|unordered_map]]</code> in its standard library for storing keys and values of [[Template (C++)|arbitrary types]].<ref>{{cite web|url=http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2013/n3690.pdf|title=Programming language C++ - Technical Specification|access-date=8 February 2022|publisher=[[International Organization for Standardization]]|archive-url=https://web.archive.org/web/20220121061142/http://www.open-std.org/JTC1/SC22/WG21/docs/papers/2013/n3690.pdf|archive-date=21 January 2022|pages=812–813}}</ref>
* [[Go (programming language)|Go]]'s built-in <code>map</code> implements a hash table in the form of a [[Primitive data type|type]].<ref>{{cite web|url=https://go.dev/ref/spec#Map_types|title=The Go Programming Language Specification|website=go.dev|access-date=January 1, 2023}}</ref>
* [[Java (programming language)|Java]] programming language includes the <code>HashSet</code>, <code>HashMap</code>, <code>LinkedHashSet</code>, and <code>LinkedHashMap</code> [[Generics in Java|generic]] collections.<ref>{{cite web|url=https://docs.oracle.com/javase/tutorial/collections/implementations/index.html|title=Lesson: Implementations (The Java™ Tutorials > Collections)|website=docs.oracle.com|access-date=April 27, 2018|url-status=live|archive-url=https://web.archive.org/web/20170118041252/https://docs.oracle.com/javase/tutorial/collections/implementations/index.html|archive-date=January 18, 2017|df=mdy-all}}</ref>
* [[Python (programming language)|Python]]'s built-in <code>dict</code> implements a hash table in the form of a [[Primitive data type|type]].<ref>{{cite journal|journal=[[Journal of Physics: Conference Series]]|first1=Juan|last1=Zhang|first2=Yunwei|last2=Jia|title=Redis rehash optimization based on machine learning|volume=1453|year=2020|issue=1 |page=3|doi=10.1088/1742-6596/1453/1/012048 |bibcode=2020JPhCS1453a2048Z |s2cid=215943738 |doi-access=free}}</ref>
* [[Ruby (programming language)|Ruby]]'s built-in <code>Hash</code> uses the open addressing model from Ruby 2.4 onwards.<ref>{{cite web|url=https://blog.heroku.com/ruby-2-4-features-hashes-integers-rounding#hash-changes|title=Ruby 2.4 Released: Faster Hashes, Unified Integers and Better Rounding|author=Jonan Scheffler|date=December 25, 2016|website=heroku.com|access-date=July 3, 2019|df=mdy-all|archive-date=July 3, 2019|archive-url=https://web.archive.org/web/20190703145530/https://blog.heroku.com/ruby-2-4-features-hashes-integers-rounding#hash-changes|url-status=live}}</ref>
* [[Rust (programming language)|Rust]] programming language includes <code>HashMap</code>, <code>HashSet</code> as part of the Rust Standard Library.<ref>{{cite web |title=doc.rust-lang.org |url=https://doc.rust-lang.org/std/index.html |url-status=live |archive-url=https://web.archive.org/web/20221208155205/https://doc.rust-lang.org/std/index.html |archive-date=December 8, 2022 |access-date=December 14, 2022 |df=mdy-all}}</ref>
* The [[.NET]] standard library includes <code>HashSet</code> and <code>Dictionary</code>,<ref>{{cite web |title=HashSet Class (System.Collections.Generic) |url=https://learn.microsoft.com/en-us/dotnet/api/system.collections.generic.hashset-1?view=net-7.0 |website=learn.microsoft.com |access-date=1 July 2023 |language=en-us}}</ref><ref>{{Cite web |last=dotnet-bot |title=Dictionary Class (System.Collections.Generic) |url=https://learn.microsoft.com/en-us/dotnet/api/system.collections.generic.dictionary-2?view=net-8.0 |access-date=2024-01-16 |website=learn.microsoft.com |language=en-us}}</ref> so it can be used from languages such as [[C Sharp (programming language)|C#]] and [[VB.NET]].<ref>{{cite web |url=https://www.dotnetperls.com/hashset-vbnet |title=VB.NET HashSet Example |website=Dot Net Perls}}</ref>