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08.09.2002 at 02:39AM PDT, ID: 20334434
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8.2

Program design question

Asked by eelko in Perl Programming Language

A perl program got two files (plain ASCII). One containing a large number of lines (>= 5000) where each line is a record with X fields seperated by a colon.
The second file contains a small number of records (same layout as the first one).

The task of this perl program is to lookup each record of the second file into the first. If the record exist then to update the record (if necessary), if the record does not exist then appending the new record.

I tought about reading all the records of the first and put them into a big hash-of-hash structure where key of the first hash is the primary key of a record and the keys of the second hash are the fieldnames of the record.
If I have this then it is very simple to lookup a record, to update a record of to append a record.

I wonder if this is not too expensive in speaking of execution time.
Second, is there already a package for handling colon seperated files?

Any comment or suggestion is welcome.

Eelko.Start Free Trial
[+][-]08.09.2002 at 06:21AM PDT, ID: 7209128

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[+][-]08.09.2002 at 12:34PM PDT, ID: 7210261

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Zone: Perl Programming Language
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Solution Provided By: bluprint
Participating Experts: 2
Solution Grade: A
 
 
 
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