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01.25.2004 at 08:03PM PST, ID: 20862610
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7.6

keep track of changes in a hash (maybe tie?)

Asked by kandura in Perl Programming Language

Tags:

I have a module that supplies hashrefs to calling code, but I need a way to keep track whether the calling code makes changes to the contents of that hash.
Is there a way to do that?

I wanted to make a quick and dirty config management system using xml and xml::simple, in such a way that I can just add stuff to a hash, and that it gets saved automatically.

Some background may be interesting:
I have a module that looks like this:

package MyConfig;

sub getConfig {
...
    my $myconfig = XMLin(...);
    return $myconfig;
}

sub DESTROY {
 # save $myconfig with XMLout(...)
 # but how do I know if it's changed?
}Start Free Trial
 
Keywords: keep track of changes in a hash (may…
Title
1 hash delete first entry?
2 return arrays and hashes
3 ref --> hash
4 Insertion order hash of a hash
5 Hash
6 The tie function and Hashes?
 
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[+][-]01.25.2004 at 09:32PM PST, ID: 10199079

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[+][-]01.26.2004 at 08:36AM PST, ID: 10201671

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About this solution

Zone: Perl Programming Language
Tags: hash
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Solution Provided By: jmcg
Participating Experts: 2
Solution Grade: B
 
 
[+][-]01.26.2004 at 03:46PM PST, ID: 10205224

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[+][-]01.27.2004 at 07:53AM PST, ID: 10210282

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[+][-]04.02.2004 at 03:56PM PST, ID: 10745437

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