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How does lucene index documents?

...he best more recent alternative is http://lucene.apache.org/core/3_6_2/fileformats.html There's an even more recent version at http://lucene.apache.org/core/4_10_2/core/org/apache/lucene/codecs/lucene410/package-summary.html#package_description, but it seems to have less information in it than the ...
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What is Common Gateway Interface (CGI)?

...to and from an application. More specifically, it describes how request information is passed in environment variables (such as request type, remote IP address), how the request body is passed in via standard input, and how the response is passed out via standard output. You can refer to the CGI sp...
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Difference between 3NF and BCNF in simple terms (must be able to explain to an 8-year old)

...herefore more strict. The difference is so subtle that what many people informally describe as 3NF is actually BCNF. For example, you stated here that 3NF means "data depends on the key[s]... and nothing but the key[s]", but that is really an informal description of BCNF and not 3NF. 3NF could more...
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REST, HTTP DELETE and parameters

...uations where there is a conflict which prevents the RESTful service to perform the operation, but there is still a chance that the user might be able to resolve the conflict himself. A pre-deletion confirmation (where there are no real conflicts which would prevent deletion) is not a conflict per s...
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What is the formal difference in Scala between braces and parentheses, and when should they be used?

What is the formal difference between passing arguments to functions in parentheses () and in braces {} ? 9 Answers ...
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What is the behavior difference between return-path, reply-to and from?

... In other words, the Return-Path header is as trustworthy as the checks performed by the receiving SMTP server, where the others can be easily spoofed. – cdhowie Jun 15 '15 at 20:32 ...
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Accessing inactive union member and undefined behavior?

... is an incomplete type, a program that necessitates this conversion is ill-formed. If the object to which the glvalue refers is not an object of type T and is not an object of a type derived from T, or if the object is uninitialized, a program that necessitates this conversion has undefined behavio...
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What should every developer know about databases? [closed]

...l design. The next thing developers need to learn is that while speed (performance) is important, other measures of design goodness are even more important, such as the ability to revise and extend the scope of the database down the road, or simplicity of programming. Finally, anybody who mess...
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Is 'switch' faster than 'if'?

... like this -- note that the compiler in practice would need to insert some form of if test around the table to ensure that the input was valid in the table. Note also that it only works in the specific case that the input is a run of consecutive numbers. If the number of branches in a switch is ext...
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Convert JavaScript string in dot notation into an object reference

...a sign that there is something very wrong going on (unless maybe you're performing some strange deserialization). That is to say, novices who find their way to this answer must ask themselves the question "why am I doing this?" It is of course generally fine to do this if your use case is ...