Searching a search engine

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Jan Brouwer
Posts: 201
Joined: Thu Mar 22, 2007 7:12 pm
Location: Netherlands

Searching a search engine

Post by Jan Brouwer »

Hi,

Does anyone know of a search engine that handles literal searches correctly?
E.g. one that is able to find the following exact text (part between the quotes): "(*this)[".
I seem to remember that Google supported this in the past, but no more it seems :(
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Eelco de Groot
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Joined: Sun Mar 12, 2006 2:40 am
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Re: Searching a search engine

Post by Eelco de Groot »

Jan Brouwer wrote:Hi,

Does anyone know of a search engine that handles literal searches correctly?
E.g. one that is able to find the following exact text (part between the quotes): "(*this)[".
I seem to remember that Google supported this in the past, but no more it seems :(
Hallo Jan,

Werkt dit niet zoals je verwacht, "advanced search" als optie, direct achter het zoekvenster?

http://www.google.nl/advanced_search?hl=nl

Verder heb ik nog als zoekmachine ingesteld:

http://scholar.google.nl/
http://www.searchmash.com/
http://www.heelom.com/

Eelco
Debugging is twice as hard as writing the code in the first
place. Therefore, if you write the code as cleverly as possible, you
are, by definition, not smart enough to debug it.
-- Brian W. Kernighan
Christopher Conkie
Posts: 6073
Joined: Sat Apr 01, 2006 9:34 pm
Location: Scotland

Re: Searching a search engine

Post by Christopher Conkie »

Jan Brouwer wrote:Hi,

Does anyone know of a search engine that handles literal searches correctly?
E.g. one that is able to find the following exact text (part between the quotes): "(*this)[".
I seem to remember that Google supported this in the past, but no more it seems :(
These days I doubt you will find one that does that exactly. An order of preference may be......

Literal searches: Yahoo!
Conceptual/abstract searches: Ask
Information searches: Google
E-commerce searches: Yahoo!
Overall best: Google or Ask

There used to be a very good literal search engine called Teoma which now redirects to Ask, but I have no idea if the same indexing technologies are employed by Ask.

Christopher
shiv
Posts: 351
Joined: Sat Apr 01, 2006 2:03 am

Re: Searching a search engine

Post by shiv »

Prior to this thread I did not realize that literal search means regular expression search. It is far more complex to build a regular expression index than the normal keyword index. I am surprised than any search engine ever supported this before. Seems to be a lot of extra engineering effort and at best only a small % of regular expressions can be supported to maintain the normal quick speed of search results.

Yahoo does not support regular expression search. Neither does the current ask.com site. In a regex search, Kasparo? or Kasparo* should return pages containing "Kasparov" for example.
Jan Brouwer
Posts: 201
Joined: Thu Mar 22, 2007 7:12 pm
Location: Netherlands

Re: Searching a search engine

Post by Jan Brouwer »

Thanks for all your suggestions.

I did some more examination and discovered the following
- Searches between quotes do match the words in order, however most non-alphanumeric characters are ignored.
- The asterisk in "(*this)[" does indeed work as a kind of regular expression, at least in Google, but that was not my intention.
- There is Google codesearch which does exactly what I am looking for, and which also supports regular expressions, however it only searches source code. Still, nice tool!

Someone should start a literal search clone of Google, "Google" :wink: