Re: Looking things up by string prefix
On Fri, 2 Jul 2010, John B. Matthews wrote:
In article <alpine.DEB.1.10.1007020423470.29330@urchin.earth.li>,
Tom Anderson <twic@urchin.earth.li> wrote:
I want to store some things, each filed under a string key. I then want to
look those things up with other strings, finding the thing whose key is
the longest available prefix of the lookup string.
So, if i store:
/products -> foo
/products/fruit -> bar
Then lookups go like:
/products/furniture/chairs -> foo
/products/fruit/bananas -> bar
Am i right in thinking that there's nothing in the standard library that
does this? I'm writing something that uses the NavigableMap methods on
TreeMap to do it, but it's a bit grim, and not guaranteed to be as
efficient as it could be.
Am i further right in thinking that there's nothing in Apache's Commons
Collections or Google's Guava Collections that does this?
Is there any reasonable open-source library that does?
Have you seen this?
<http://code.google.com/p/patricia-trie/>
At the point at which i posted, i had not. I stumbled across it a bit
later and kicked myself. I think it should be pretty easy to add the
method i want to that.
tom
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