Definitions for lookup
lookup

Princeton's WordNetRate this definition:0.0 / 0 votes

1. search, lookupnoun

   an operation that determines whether one or more of a set of items has a specified property

   "they wrote a program to do a table lookup"

WiktionaryRate this definition:0.0 / 0 votes

1. lookupnoun

   An attempt to retrieve data.

   My database lookup failed because I misspelled the word.

WikipediaRate this definition:0.0 / 0 votes

1. Lookup

   In computer science, a lookup table (LUT) is an array that replaces runtime computation with a simpler array indexing operation. The process is termed as "direct addressing" and LUTs differ from hash tables in a way that, to retrieve a value v {\displaystyle v} with key k {\displaystyle k} , a hash table would store the value v {\displaystyle v} in the slot h ( k ) {\displaystyle h(k)} where h {\displaystyle h} is a hash function i.e. k {\displaystyle k} is used to compute the slot, while in the case of LUT, the value v {\displaystyle v} is stored in slot k {\displaystyle k} , thus directly addressable.: 466  The savings in processing time can be significant, because retrieving a value from memory is often faster than carrying out an "expensive" computation or input/output operation. The tables may be precalculated and stored in static program storage, calculated (or "pre-fetched") as part of a program's initialization phase (memoization), or even stored in hardware in application-specific platforms. Lookup tables are also used extensively to validate input values by matching against a list of valid (or invalid) items in an array and, in some programming languages, may include pointer functions (or offsets to labels) to process the matching input. FPGAs also make extensive use of reconfigurable, hardware-implemented, lookup tables to provide programmable hardware functionality.

ChatGPTRate this definition:0.0 / 0 votes

1. lookup

   Lookup is the process of searching, finding, or retrieving specific information stored in a database, computer system, or any other source of organized data. It often refers to a variety of search tools and functions in algorithms or computer systems, designed to quickly pull up or locate specific data or pieces of information.

Matched Categories

1. • Operation

Usage in printed sourcesFrom: 

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Anagrams for lookup »

1. uplook

How to pronounce lookup?

1. Alex

   US English

   David

   US English

   Mark

   US English

   Daniel

   British

   Libby

   British

   Mia

   British

   Karen

   Australian

   Hayley

   Australian

   Natasha

   Australian

   Veena

   Indian

   Priya

   Indian

   Neerja

   Indian

   Zira

   US English

   Oliver

   British

   Wendy

   British

   Fred

   US English

   Tessa

   South African

How to say lookup in sign language?

Numerology

1. Chaldean Numerology

   The numerical value of lookup in Chaldean Numerology is: 6

2. Pythagorean Numerology

   The numerical value of lookup in Pythagorean Numerology is: 9

Popularity rank by frequency of use

References

1. ^ Princeton's WordNet
   http://wordnetweb.princeton.edu/perl/webwn?s=lookup
2. ^ Wiktionary
   https://en.wiktionary.org/wiki/Lookup
3. ^ Wikipedia
   https://en.wikipedia.org/wiki/Lookup
4. ^ ChatGPT
   https://chat.openai.com
5. ^ Usage in printed sources
   https://books.google.com/ngrams/graph?content=lookup