Re: Keyed Array Data Structure %LOOKUPLT -- RPG400-L

Subject: Re: Keyed Array Data Structure %LOOKUPLT
From: John Yeung <gallium.arsenide@xxxxxxxxx>
Date: Fri, 30 Apr 2021 08:58:40 -0400
List-archive: <https://archive.midrange.com/rpg400-l/>
List-post: <mailto:rpg400-l@lists.midrange.com>
List-subscribe: <https://lists.midrange.com/mailman/listinfo/rpg400-l>, <mailto:rpg400-l-request@lists.midrange.com?subject=subscribe>
List-unsubscribe: <https://lists.midrange.com/mailman/options/rpg400-l>, <mailto:rpg400-l-request@lists.midrange.com?subject=unsubscribe>

On Fri, Apr 30, 2021 at 7:28 AM Dave <dfx1@xxxxxxxxxxxxxx> wrote:

This compiles :
$I = %LOOKUP ( myDate : myArray(*).DATE )

This doesn't
$I = %LOOKUPLT ( myDate : myArray(*).DATE )

Well, for a start, %LOOKUPLT requires the array to be declared as a
sorted array (to have an ascending or descending order). Otherwise
"less than" doesn't make a lot of sense. %LOOKUP has the option of
searching through all the elements if it needs to.

John Y.

As an Amazon Associate we earn from qualifying purchases.

This mailing list archive is Copyright 1997-2025 by midrange.com and David Gibbs as a compilation work. Use of the archive is restricted to research of a business or technical nature. Any other uses are prohibited. Full details are available on our policy page. If you have questions about this, please contact [javascript protected email address].

Operating expenses for this site are earned using the Amazon Associate program and Google Adsense.