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  2. RPG400-L
  3. December 2010

Re: Problem using tlookup bif

It looks to me like %TLOOKUPxx uses a binary search, as %lookupxx does.

"Since a binary search is used by the %LOOKUPxx built-in functions for a sequenced array, and the correct function of a binary search depends on the data being in order, the search may only look at a few elements of the array. When the array is out of order, the result of a binary search is unpredictable. "


On 12/16/2010 10:23 AM, Dennis Lovelady wrote:
The manual refers to both kinds of lookups. The kind that David is using is
not of the %TLOOKUPxx set, the nearest I can determine. The %TLOOKUP BIF
works by comparing each value starting with 1 and ending when a match is
found or the end of the table is reached. Sequence is immaterial. Or at
least that's the way it was the first 35 years or so of the language.

Dennis Lovelady
http://www.linkedin.com/in/dennislovelady
--
"A diplomat is a person who can tell you to go to hell in such a way that
you actually look forward to the trip."
-- Caskie Stinnett


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