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Re: Finding something in hashes of hashes

by bobf (Monsignor)
on Dec 28, 2009 at 00:52 UTC ( #814562=note: print w/replies, xml ) Need Help??


in reply to Finding hashes in hashes of hashes

This sounds fairly straightforward. What have you tried?

The sub is given a hashref ($families) and the value of a key in the inner hash ('bart'). The key to look in is specified in the sub name ('kid'). In pseudocode, I would do something like this:

for each family surname in the hash (%$families) get the value of the 'kid' key for the corresponding family hash if the value is 'bart', return the surname if the for loop completes the value wasn't found, so return or die

I hope that gets you started. Feel free to come back with more specific questions. Good luck!

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[Corion]: Meh. My bank removed (part of) their CSV download facilities. Now I will either have to implement a full scraper or automate the download using the HBCI interface instead (or just get a new account elsewhere...)
[Corion]: On the upside, I spend a lot of time thinking this weekend about how to actually implement rate limiting for futures, and if things work out, maybe even loading a configuration from an external file makes sense
[Corion]: I've also found some interesting invariants that I have to think/write about more. A simple rate limiter will never change the order of the input, while a limiter that allows for parallel execution will change the order. But my API currently allows for bo
[Corion]: ... for both, and I'm not sure if I want to add the cruft from the parallel API (a token that you need to hold on to while you hold the lock) to the rate limiting API too, to allow seamless up/downgrades, or not.

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