Hi All,
  I've almost finished my new config module (well the working parts anyway). Got it generating the HTML, forms, verifying, saving the new variable config to the files with data dumper so that they just need to be required in. Saving special config to anonymous subroutines in a dispatch table. It's been a nightmare, but it's all looking pretty much they way I wanted it to, except for now I've hit the final hurdle and it seems I have 2 options.
  The problem is that the old system I used wrote the variable files with a nasty bit of code that had it all spelled out such as:-
$::Config->{group1}->{opt1} = 'A';
$::Config->{group1}->{opt2} = 'B';
$::Config->{group1}->{opt3} = 'C';
$::Config->{group2}->{opt1} = 'D';

[download]
So If I included another variable file later it would just replace and doubling up of variables which I what I want:- 
$::Config->{group1}->{opt3} = 'C2';
$::Config->{group2}->{opt2} = 'E';

[download]
The problem is now that I'm using data dumper, the variables files are looking like:- 
$::Config = {
    group1 => {
        opt1 => 'A',
        opt2 => 'B',
        opt3 => 'C',
    },
    group2 => {
        opt1 => 'D',
    },
};

[download]
And:- 
$::Config = {
    group1 => {
        opt3 => 'C2',
    },
    group2 => {
        opt1 => 'E',
    },
};

[download]
So if I load the second file after the first it's loosing data rather than updating the hash it's replacing it.

So as far as I can see my options are:-
A) Get Data::Dumper to dump in the old format, problem is that after looking at the examples I can't see a way of doing this. So it could mean dropping Data::Dumper and writing my own dumper...

B) Rename the first config hash then merge it with the new one using Hash::Merge. Problem with this is that it's going to be way less efficient and slower than a).
Is there a simpler solution that I'm missing?

Thanks in advance

Lyle

UPDATE: I've been trying the merge route as I thought it'd be quicker. Problem is that Hash::Merge doesn't merge array references, just hashes, so I hacked it to merge arrays better. Testing it now but I'm not sure if this method is going to be more trouble than it's worth and I'll end up writing a new dumper :(

In reply to Last hurdle.. Merge hash refs or change data dump? by cosmicperl

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.