hash
/ˈhæʃ/
Meanings
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noun
A data structure used for indexing and storing data in a database or file system.
- "The hash table stores data as key-value pairs."
- "The hash function is used to map keys to indices in the hash table."
Pronunciation
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/ˈhæʃ/
Source: "https://commons.wikimedia.org/w/index.php?curid=88680921" -
/ˈhæʃ/
Source: "https://commons.wikimedia.org/w/index.php?curid=88680921"
Synonyms
checksum , hash mark , hash sign , hashtag , number sign , octothorn , octothorpe , pound , pound sign , sharp sign , square
Variants
List of all variants of hash that leads to same resulthash , hashed , hashes , hashing , hash brown potatoes , hash browns , hashed brown potatoes , hashed browns , hash house , hash houses , hash mark , hash marks , hash out , hash over , hashed out , hashes out , hashing out , hash sign , red flannel hash , red flannel hashes , make a hash of
Etymology
origin and the way in which meanings have changed throughout history.The term 'hash' comes from the verb 'to hash', meaning 'to chop or grind coarsely'. In the context of data structures, it likely derives from the idea of 'mixing up' data to create indices.
Trivia
Any details, considerations, events or pieces of information regarding the word-
Hashes were first proposed by Dr. Robert Rivest, Adi Shamir, and Leonard Adleman in 1992.
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The Merkle Tree, a type of hash tree, is named after Ralph Merkle who described it in 1979.
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Hash functions are used in various cryptographic algorithms, such as SHA (Secure Hash Algorithm) and MD5 (Message-Digest Algorithm 5).
Related Concepts
informations on related concepts or terms closely associated with the word. Discuss semantic fields or domains that the word belongs to-
Hash Function: A mathematical function that maps data of arbitrary size to a fixed size. It is a crucial component of hash tables and other data structures.
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Hash Table: A data structure that uses a hash function to store and retrieve data based on keys.
Culture
Any cultural, historical, or symbolic significance of the word. Explore how the word has been used in literature, art, music, or other forms of expression.Hashes have been used extensively in computer science and cryptography, particularly for secure data storage and transmission. They have been a subject of research and development since the early days of computing.
How to Memorize "hash"
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visualize
- Imagine a large table with many slots or 'buckets'. Each slot can hold one piece of data, and the slot number is determined by the hash function.
- Visualize the hash function as a 'mixer' that takes the data and produces a fixed-size index. -
associate
- Associate the word 'hash' with 'data structure' and 'indexing'.
- Think of 'hashing' as a way to 'mix up' data for efficient storage and retrieval. -
mnemonics
- H - Holds data securely
- A - Assigns indices based on keys
- S - Stores data efficiently
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