Exercises, examples and other material relating to training module P409. This topic is presented on public course Using Perl on the Web
As your web site grows from half a dozen pages to a hundred or a thousand, how are you going to help your customers find their way around? A good web site design with clear navigation is always vital but you'll also be well advised to provide some sort of search capability to help your users find the needle they want in what will inevitably become a bit of a haystack. We study algorithms for searching small and medium sized sites (or parts of sites) and provide pointers for you to indexing systems for large data sets.
|Articles and tips on this subject||updated|
|2233||Transforming data in Perl using lists of lists and hashes of hashes|
In Perl, you don't have conventional two dimensional arrays - you have lists which are single dimensional only. However, you can have a list that contains a reference to another list, in effect a list of lists. Very powerful stuff as it leads to a very flexible way of handling data structures - we ...
|1183||Improving searches - from OR to AND?|
There's a search box on the top of all our regular pages - put a word in there, submit the form, and you'll be offered a selection of appropriate pages ... and if there's nothing relevant, you'll be offered nearby spellings. Try a search for Ireland and a search for Irelond.
Search for multiple words, ...
Examples from our training material
Some modules are available for download
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Topics covered in this module
The science of searching.
Local search using ISINDEX.
Other ways of searching a small local area.
How do you decide what's a match?
How do you rank the matches?
Searching a larger site - building an index.
Wider searches - commercial products.
Finding sites and information by crawling.
Leaving enquiries running.
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