Hash, hashes, hash mark, or hashing may refer to:
Substances
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Hash (food)
Hash is a culinary dish consisting of chopped meat, potatoes, and fried onions. The name is derived from , meaning "to chop". It originated as a way to use up leftovers. In the U.S. by the 1860s, a cheap restaurant was called a "hash house" or ...
, a coarse mixture of ingredients
* Hash, a nickname for
hashish
Hashish ( ar, حشيش, ()), also known as hash, "dry herb, hay" is a drug made by compressing and processing parts of the cannabis plant, typically focusing on flowering buds (female flowers) containing the most trichomes. European Monitorin ...
, a cannabis product
Hash mark
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Hash mark (sports)
In sports, a hash mark or hash line is a short line/bar marking that is painted perpendicular to the sidelines or side barricades, used to help referees and players recognize on-field locations and visually measure distances. Hash marks serve th ...
, a marking on hockey rinks and gridiron football fields
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Hatch mark
Hatch marks (also called hash marks or tick marks) are a form of mathematical notation. They are used in three ways as:
* Unit and value marks — as on a ruler or number line
* Congruence notation in geometry — as on a geometric figure
* Graph ...
, a form of mathematical notation
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Number sign
The symbol is known variously in English-speaking regions as the number sign, hash, or pound sign. The symbol has historically been used for a wide range of purposes including the designation of an ordinal number and as a Typographic ligature, ...
(#), also known as the hash, hash mark, or (in American English) pound sign
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Service stripe
A service stripe is an embroidered diagonal stripe worn on the sleeve(s) of some military and paramilitary uniforms. In the case of the United States military, service stripes are authorized for wear by enlisted personnel on the lower part of the ...
, a military and paramilitary decoration
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Tally mark
Tally marks, also called hash marks, are a unary numeral system ( arguably).
They are a form of numeral used for counting. They are most useful in counting or tallying ongoing results, such as the score in a game or sport, as no intermediate r ...
, a counting notation
Computing
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Hash function
A hash function is any function that can be used to map data of arbitrary size to fixed-size values. The values returned by a hash function are called ''hash values'', ''hash codes'', ''digests'', or simply ''hashes''. The values are usually u ...
, an encoding of data into a small, fixed size; used in hash tables and cryptography
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Hash table
In computing, a hash table, also known as hash map, is a data structure that implements an associative array or dictionary. It is an abstract data type that maps keys to values. A hash table uses a hash function to compute an ''index'', als ...
, a data structure using hash functions
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Cryptographic hash function
A cryptographic hash function (CHF) is a hash algorithm (a map of an arbitrary binary string to a binary string with fixed size of n bits) that has special properties desirable for cryptography:
* the probability of a particular n-bit output re ...
, a hash function used to authenticate message integrity
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URI fragment
In computer hypertext, a URI fragment is a string of characters that refers to a resource that is subordinate to another, primary resource. The primary resource is identified by a Uniform Resource Identifier (URI), and the fragment identifier po ...
, in computer hypertext, a string of characters that refers to a subordinate resource
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Geohash
Geohash is a public domain geocode system invented in 2008 by Gustavo NiemeyerEvidences at the Wayback Machine:
labix.org in 2008, the G. Niemeyer's blog announcing Geohash
*an article about Geohash witnessing and citing G. Niemeyer works, before ...
, a spatial data structure which subdivides space into buckets of grid shape
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Hashtag
A hashtag is a metadata tag that is prefaced by the hash (also known as pound or octothorpe) sign, ''#''. On social media, hashtags are used on microblogging and photo-sharing services such as Twitter or Instagram as a form of user-generated ...
, a form of metadata often used on social networking websites
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hash (Unix)
hash is a command (computing), command on Unix and Unix-like operating systems that prints the location information for the commands found. The command has also been ported to the IBM i operating system.
Syntax
$ hash ame #REDIRECT AME #REDIRECT AME
{{redirect category shell, {{R from other capitalisation{{R from ambiguous page ...
{{redirect category shell, {{R from other capitalisation{{R from ambiguous page ...
Description
When ...
technology.