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How to select the nth row in a SQL database table?
...f databases support their own way of doing it.
A really good site that talks about this and other things is http://troels.arvin.dk/db/rdbms/#select-limit.
Basically, PostgreSQL and MySQL supports the non-standard:
SELECT...
LIMIT y OFFSET x
Oracle, DB2 and MSSQL supports the standard windowing...
JPA EntityManager: Why use persist() over merge()?
..., the difference is in what you do with the entity afterwards.
Persist takes an entity instance, adds it to the context and makes that instance managed (ie future updates to the entity will be tracked).
Merge returns the managed instance that the state was merged to. It does return something what...
Use of Application.DoEvents()
...he enduring mystique of DoEvents(). There's been an enormous amount of backlash against it, but nobody ever really explains why it is "bad". The same kind of wisdom as "don't mutate a struct". Erm, why does the runtime and the language supports mutating a struct if that's so bad? Same reason: yo...
How can I check the system version of Android?
Does anyone know how can I check the system version (e.g. 1.0 , 2.2 , etc.) programatically?
13 Answers
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Is it possible for a computer to “learn” a regular expression by user-provided examples?
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The book An Introduction to Computational Learning Theory contains an algorithm for learning a finite automaton. As every regular language is equivalent to a finite automaton, it is possible to learn some regular expressions by a pr...
Why should a function have only one exit-point? [closed]
...ly a single exit point - you have a single path through the method and you know where to look for the exit. On the minus side if you use indentation to represent nesting, your code ends up massively indented to the right, and it becomes very difficult to follow all the nested scopes.
Another is tha...
HTTP vs HTTPS performance
...formation about the nature of your web site, hardware, software, and network configuration.
As others have said, there will be some level of overhead due to encryption, but it is highly dependent on:
Hardware
Server software
Ratio of dynamic vs static content
Client distance to server
Typical ...
Disable XML validation in Eclipse
My Eclipse validates XML files every time I save a file and it takes a while to validate them.
The project is created using gwt-maven-plugin.
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HTML code for an apostrophe
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If you are looking for single quote, it is
'
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finding and replacing elements in a list
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Maximilian Peters
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answered Apr 6 '10 at 1:41
ghostdog74ghostdog74
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