Re: Tie::Hash::Regex

My knowledge of ties is somewhat lacking, and I don't know how possible it would be, but could this be modified or adapted such that instead of just the first value who's key matched the regex, could not all values whose keys match the regex be returned in some fashion. I know this wouldn't make sense programmatically for $hash{/./} (the $ implied scalar, but you could return a list ref, but this can easily get messy), but I dunno if it's possible to use something like @hash{/./} to do this. Sure, this is just simply doing the same as @array = map { $hash{$_} if /./ } keys %hash;, but it would seem to compliment the above well.

Dr. Michael K. Neylon - mneylon-pm@masemware.com || "You've left the lens cap of your mind on again, Pinky" - The Brain

Comment on Re: Tie::Hash::Regex Select or Download Code

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Re: Re: Tie::Hash::Regex by davorg (Chancellor) on May 11, 2001 at 17:28 UTC
I was just having a very similar conversation with someone in the office about those possibilities. Didn't manage to come to any firm conclusions tho' :( One thing we did think of - you could implement the `delete` function in such a way that it deleted every key that matched the regex (still some problems there tho' - what if the exact key of one element is also part of another key and would therefore match the regex?) -- <http://www.dave.org.uk> "Perl makes the fun jobs fun and the boring jobs bearable" - me	[reply]
Re: Re: Re: Tie::Hash::Regex by Masem (Monsignor) on May 11, 2001 at 18:14 UTC
Another idea similar to your deleting but without modifying the hash would be to make the fetch function store the current position of where it is in the keys, then subsequent calls would start from that last position. Of course, you'd then need a secondary hash in the tie to keep track of this, and there would be no easy way to reset this short of a function call to trick it. Additionally, modification of the hash between subsequent calls would pose a problem. Just tossing out ideas here in case something triggers insight.... Dr. Michael K. Neylon - mneylon-pm@masemware.com \|\| "You've left the lens cap of your mind on again, Pinky" - The Brain	[reply]


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