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Lucene is an open-source full-text search library which makes it easy to add search functionality to an application or website.The goal of Lucene Tutorial.com is to provide a gentle introduction into Lucene.
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What's New
My recent blog posts about Lucene
Solr FunctionQueries allow you to modify the ranking of a search query in Solr by applying functions to the results. There are a list of out-of-box FunctionQueries available here: http://wiki.apache.org/solr/FunctionQuery In order to write a custom Solr FunctionQuery, you’ll need to do 2 things: 1. Subclass org.apache.solr.search.ValueSourceParser. Here’s a stub ValueSourceParser. public class MyValueSourceParser extends ValueSourceParser { public void [...]
Here’s what I’m trying to do: Given this mysql table: CREATE TABLE `tag` ( `id` integer AUTO_INCREMENT NOT NULL PRIMARY KEY, `name` varchar(100) NOT NULL UNIQUE, `category` varchar(100) ); INSERT INTO tag (name,category) VALUES (‘good’,‘foo’); INSERT INTO tag (name,category) VALUES (‘awe-inspiring’,‘foo’); INSERT INTO tag (name,category) VALUES (‘mediocre’,‘bar’); INSERT INTO tag (name,category) VALUES (‘terrible’,‘car’); and this solr schema <field name="tag-foo" type="string" [...]
Read more about Dynamic facet population with Solr DataImportHandler
Recently upgraded a 3-year old app from Lucene 2.1-dev to 3.0.1. Some random thoughts to the evolution of the Lucene API over the past 3 years: I miss Hits Sigh. Hits has been deprecated for awhile now, but with 3.0 its gone. And I have to say its a pain that it is. Where I used to pass [...]
As far as I know, none of the geocoders consistently provide neighborhood data given a street address. Useful information when consulting the gods at google proves elusive too. Here’s a step-by-step guide to obtaining neighborhood names for your street addresses (on Ubuntu). 0. Geocode your addresses if necessary using Yahoo, MapQuest or Google geocoders. (this means [...]
Read more about Mapping neighborhoods to street addresses via geocoding
Aug 16 update: I ran a more comprehensive analysis with a more complete dataset. Find out the new figures for the average length of a URL I’ve always been curious what the average length of a URL is, mostly when approximating memory requirements of storing URLs in RAM. Well, I did a dump of the DMOZ [...]
