Weird title - sorry. Let me explain...

The module Config::Loader Config::Merge has the ability to override the default config with local values. For instance, on your development machine, you may want to use a different database host. So you can override just that value: 


   app:
     servers:
        db:
          host:     db.domain.com
          username: username
          password: password
        email:
          host:     mail.domain.com
          etc

[download]

Then override/merge with: 

      app:
        servers:
          db:
             host:  dev.domain.com
          email:
             host:  dev.domain.com

[download]

A deep merge of hashes is done, so that the other config data is preserved.

I would like to provide a mechanism for altering arrays, rather than just having to copy and paste the entire array. So what I have thought of is the following: 


    main:
        cronjobs:
           - job1
           - job2
           - job3
           - job4
           - job5

[download]

Then override/merge with:

    main:
      cronjobs:
         '!' :                        # key '!' must exist to signal m
+erge
             '-' :                    # delete elements 3 and 5
                 - 3
                 - 5
             '+' :                    # append jobs 6 and 7
                 - job6
                 - job7
          OR 
             '+' :                    # insert job8 at index 2, job9 a
+t index 5
                 2: job8
                 5: job9

         1:  job10                    # change index1 from job2 to job
+10

[download]
I realise that most people probably won't use this, but I have wanted something like this on occasion, and so I was wondering if anybody had a better/simpler way of representing these changes?

thanks

Clint

UPDATE - corrected hostname to host (thanks fenLisesi)

UPDATE - change the module name to Config::Merge

In reply to RFC: An "API" for overriding array values in config data by clinton

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