Rehashing Meaning: Definition, Examples, and Translations
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rehashing
[riหhรฆสษชล ]
Definitions
computer science
Rehashing is a process used in data structures, particularly in hash tables, to resolve collisions by creating a new hash function or adjusting the existing one. It typically occurs when the number of entries exceeds a certain threshold, prompting the table to expand and re-evaluate the position of existing entries based on the new function or table size.
Synonyms
rehash, rehashing function, transforming.
Examples of usage
- Rehashing improved the efficiency of our hash table.
- After rehashing, the search times decreased significantly.
- The algorithm supports automatic rehashing for smoother performance.
data structures
To rehash means to apply a new hash function to the existing data in a hash table to improve its distribution. This operation is essential when dealing with increasing data loads to minimize collisions and enhance retrieval speed.
Synonyms
recalculate, recompute, transform.
Examples of usage
- We need to rehash the data to accommodate more entries.
- Rehashing the database helped organize the records better.
- It is crucial to rehash after expanding the hash table.
Translations
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Interesting Facts
Media and Pop Culture
- In film and television, rehashing often occurs in sequels or remakes, where old stories are given new actors or settings.
- Many popular songs are often rehashed through covers or remixes, bringing back familiar tunes with a fresh twist.
Education
- In academic writing, rehashing can be a strategy to revisit and clarify previously discussed concepts for better understanding.
- Teachers often encourage students to rehash their ideas in different formats, like turning a written essay into a presentation.
Psychology
- The process of rehashing can help in memory recall, as revisiting old information strengthens neural connections in the brain.
- People often rehash past experiences in therapy as a way to process emotions and gain new perspectives.
Creativity
- Many artists find inspiration in rehashing previous works, as it allows them to innovate while respecting their original ideas.
- In writing, rehashing can lead to exploration of different styles, resulting in unique interpretations of existing themes.
Origin of 'rehashing'
Main points about word origin
- The prefix 're-' means 'again', and 'hash' originally refers to a dish made of chopped meat mixed with potatoes.
- The word started to be used in the early 20th century to describe the process of reworking or revising previous content.
The term 'rehashing' originated in computer science terminology during the late 20th century as part of the development of hash tables and data structures. The prefix 're-' indicates repetition, while 'hash' pertains to the hashing algorithms used to convert data into fixed-size values or keys. This process is essential for efficient data retrieval in computer systems. The concept has evolved as computing technology advanced, with modern implementations of hash tables often incorporating dynamic resizing and enhanced collision resolution techniques. The idea of rehashing reflects the growing need for adaptive methods to manage data integrity and speed amidst increasing informational loads in database systems. As programming languages and algorithms have expanded, so has the understanding and necessity of rehashing in ensuring optimal performance in various applications, from databases to caching mechanisms.