LOOKUPTABLE

Lookup table

In computer science, a lookup table is an array that replaces runtime computation with a simpler array indexing operation. The savings in terms of processing time can be significant, since retrieving a value from memory is often faster than undergoing an 'expensive' computation or input/output operation. The tables may be precalculated and stored in static program storage, calculated as part of a program's initialization phase, 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 items in an array and, in some programming languages, may include pointer ...

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lookup table

Noun

  1. A data structure created for the purpose of translating keys into values.


The above text is a snippet from Wiktionary: lookup table
and as such is available under the Creative Commons Attribution/Share-Alike License.

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