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Lookup table - traduction vers espagnol
![Part of a 20th-century table of [[common logarithm]]s in the reference book [[Abramowitz and Stegun]].](https://commons.wikimedia.org/wiki/Special:FilePath/Abramowitz&Stegun.page97.agr.jpg?width=200 "Part of a 20th-century table of [[common logarithm]]s in the reference book [[Abramowitz and Stegun]].")
![Billiard Table Manufactory, J. M. Brunswick & Bro., Proprietors, Cincinnati, Ohio, 1865 ad](https://commons.wikimedia.org/wiki/Special:FilePath/"Billiard Table Manufactory, J. M. Brunswick & Bro., Proprietors, Cincinnati, Ohio" 1865 ad in Polk's Nashville (Davidson county, Tenn.) City Directory ... 1865 (IA polksnashvilleda00nash) (page 10 crop).jpg?width=200 "Billiard Table Manufactory, J. M. Brunswick & Bro., Proprietors, Cincinnati, Ohio, 1865 ad")
![cue ball}} and the 1 ball close to a WPA-style pocket. (The balls are the same size; the cue ball looks large due to [[foreshortening]].)](https://commons.wikimedia.org/wiki/Special:FilePath/CueBallOneBallNearPocket.jpg?width=200 "cue ball}} and the 1 ball close to a WPA-style pocket. (The balls are the same size; the cue ball looks large due to [[foreshortening]].)")
![[[Russian pyramid]] ball at a corner pocket. The relative size of the ball and the pocket makes the game very challenging.](https://commons.wikimedia.org/wiki/Special:FilePath/Russian billiards ball at a corner pocket.jpg?width=200 "[[Russian pyramid]] ball at a corner pocket. The relative size of the ball and the pocket makes the game very challenging.")
![original Ford Mustang]] converted into a novelty pool table, exhibited at the 2011 [[Montreal International Auto Show]]](https://commons.wikimedia.org/wiki/Special:FilePath/Ford Mustang As Pool Table -- Rear (MIAS '11).jpg?width=200 "original Ford Mustang]] converted into a novelty pool table, exhibited at the 2011 [[Montreal International Auto Show]]")
![[[Soccer]] billiards table, also known as ''footpool'' or ''[[snookball]]''. The balls are regular soccer balls coloured and numbered to resemble pool balls.](https://commons.wikimedia.org/wiki/Special:FilePath/Large oversized pool area at a student lounge in a college.jpg?width=200 "[[Soccer]] billiards table, also known as ''footpool'' or ''[[snookball]]''. The balls are regular soccer balls coloured and numbered to resemble pool balls.")
Définition
Wikipédia
In computer science, a lookup table (LUT) is an array that replaces runtime computation with a simpler array indexing operation. 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.
