look something up - ορισμός. Τι είναι το look something up
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Τι (ποιος) είναι look something up - ορισμός

ARRAY DATA STRUCTURE THAT REPLACES RUNTIME COMPUTATION WITH A SIMPLER ARRAY INDEXING OPERATION
Look-up table; Look up table; Look-up; Lookup; VLOOKUP; Table (computing); Table lookup; XLOOKUP
  • Part of a 20th-century table of [[common logarithm]]s in the reference book [[Abramowitz and Stegun]].
  • right
  • Red (A), Green (B), Blue (C) 16-bit lookup table file sample. (Lines 14 to 65524 not shown)

look something up      
search for and find a piece of information in a reference book or in a database.
Lookup table         
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 with key k, a hash table would store the value v in the slot h(k) where h is a hash function i.
look up         
WIKIMEDIA DISAMBIGUATION PAGE
Look Up (album); Look Up (disambiguation)
v. (d; intr.) to look up to ('to respect') (children look up to their parents)

Βικιπαίδεια

Lookup table

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.