re: finding the right place in a RRN file

[John Carr <74711.77@xxxxxxxxxxxxxx>]

I'd be willing to bet that 90% of the programers who will see or who 
will be asked to maintain/enhance the File/Program/Algorithm 
would rather maintain a RPGII Level Breaking Matching record program. 
  But I might be wrong.

John Carr

>Booth,

>Since the records are sorted in the order that you want to search,
>you can use a binary search technique.  It basically works by
>eliminating half of the remaining records on each pass and is much
>faster than you might think, even on very large files.  If you need
>specifics on the algorithm, let me know.



On Sun, 30 Mar 97 13:26:38, boothm@earth.goddard.edu wrote:

>I'm thinking there's gotta be an easy way to do this.
>
>I have a sequential file, sorted into alphabetical order on a field called
>"LastName".  I want to process it as a subfile by Relative Record Number.
>
>But a user needs to be able  set the file at a particular "LastName",
>based on a keyed-in field called "GetName".  
>
>Is there an easy way to do that?
>Thanks.

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