LOOKUP TABLE Meaning and
Definition
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A lookup table, also known as a search table or a hash table, is a data structure in computer science that is used to store information for efficient retrieval. It is essentially an organized collection of key-value pairs, where each key is unique and associated with a corresponding value. The main objective of a lookup table is to expedite the process of finding the value associated with a given key.
The lookup table works on the principle of indexing, where keys are used to access the corresponding values directly. By using a well-organized structure, such as an array or a tree, the lookup table enables extremely quick access to values, even for large datasets.
This data structure is commonly employed in various applications, such as database management systems, programming languages, and computer graphics, to enhance efficiency in search and retrieval operations. By precomputing and storing the results of lengthy computations or complex queries, lookup tables eliminate the need for repetitive calculations, hence dramatically improving performance.
Furthermore, lookup tables are particularly useful in situations where there are limited resources (such as time or memory) and faster access to already computed results is desired. They serve as a time-saving mechanism, reducing the computational overhead involved in repeatedly performing intricate computations or accessing external resources.
In summary, a lookup table is an efficient data structure used to store key-value pairs, enabling fast retrieval of values by employing indexing. Its application spans various domains, ultimately optimizing performance by eliminating redundant calculations or accessing external resources.
Common Misspellings for LOOKUP TABLE
- kookup table
- pookup table
- oookup table
- liokup table
- lkokup table
- llokup table
- lpokup table
- l0okup table
- l9okup table
- loikup table
- lokkup table
- lolkup table
- lopkup table
- lo0kup table
- lo9kup table
- loojup table
- loomup table
- loolup table
- loooup table
- looiup table
Etymology of LOOKUP TABLE
The word "lookup table" is derived from the combination of the verbs "look up" and the noun "table".
"Look up" is a phrasal verb that means to search for information in a reference source or to find a particular item of data. It originated from the Middle English word "loken" meaning "to look fixedly".
A "table" in this context refers to a structured collection of data organized into rows and columns. In computing, a table is commonly used to store and present data.
Therefore, a "lookup table" is a structured collection of data that is used to quickly search and retrieve specific values or information. It is a commonly used term in computer science, databases, and various fields of data analysis.
