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Re^2: dereference array

by natxo (Scribe)
on Dec 03, 2013 at 13:23 UTC ( #1065414=note: print w/replies, xml ) Need Help??


in reply to Re: dereference array
in thread dereference array

Thanks for your (very fast) reply!

I have indeed an array ... of arrays:

ARRAY(0x235bc88)|ARRAY(0x235bd18)|ARRAY(0x235bd90)|ARRAY(0x235be08)|ARRAY...

Ok, a step in the right direction.

Replies are listed 'Best First'.
Re^3: dereference array
by hippo (Monsignor) on Dec 03, 2013 at 13:33 UTC

    Apologies, I missed that. When you call Dumper with an array argument it displays each element as a different VAR which misled me.

    So actually, you have an array, each member of which is an arrayref. This means you hook into the outer array directly but into the elements as references, so the print statement could become something like:

    print join('|', map { $_->[0] } @edits), "\n";

    In map the $_ is a placeholder for each element of the @edits array, which we then use to extract element zero to be passed to join.

    HTH.

    PS. I'm not convinced there's much value in using this data structure to begin with, unless you will make the arrayrefs multi-valued at some point. You could again use map to change this:

    @edits = map { $_->[0] } @edits; # Now @edits is just an array of scalars so we can print join('|', @edits), "\n";

    Just a thought.

      Thanks!

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[vrk]: None, other than the location of the error: auto/NetAddr/IP/ _splitref.al
[vrk]: Aha, there's a reference to "bug report 82719" in NetAddr/IP.pm's sub _splitref.
[moritz]: wow, that's their idea of an "improved error message"
[moritz]: how about "This network is too large to enumerate all host addresses." or so?
[vrk]: Well, there's a call to notcontiguous() before the error, whose description is "counts the bit positions remaining in the mask when the rightmost '0's are removed"
[vrk]: Clear as mud!

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