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The performance impact of using instanceof in Java
...all efficiencies, say about 97% of the time: premature optimization is the root of all evil." The performance of instanceof probably won't be an issue, so don't waste your time coming up with exotic workarounds until you're sure that's the problem.
...
Putty: Getting Server refused our key Error
...horized_keys file.
And that works.
Another thing is that even I enabled root login, I cannot get root to work. Better use another user.
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How do you manage databases in development, test, and production?
...s readable also at http://martinfowler.com/articles/evodb.html
In one PHP+MySQL project I've had the database revision number stored in the database, and when the program connects to the database, it will first check the revision. If the program requires a different revision, it will open a page fo...
Environment variables for java installation
...iles(x86)'
Notice that these environment variables are derived from the "root" environment variable JAVA_HOME. This makes it easy to update your environment variables when updating the JDK. Just point JAVA_HOME to the fresh installation.
There is a blogpost explaining the rationale behind all the...
LINQ: When to use SingleOrDefault vs. FirstOrDefault() with filtering criteria
...could translate to SQL in different ways. I just tried LINQPad with the IQ MySql provider, and FirstOrDefault() adds LIMIT 0,1 while SingleOrDefault() adds nothing.
– Lucas
Jan 15 '15 at 16:04
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Flat file databases [closed]
...te. It works as a database, uses SQL, and is pretty easy to change over to MySQL (especially if you're using abstracted classes for database manipulation like I do!)
In fact, especially with the "accepted answer"'s method, it can drastically cut the memory usage of your app (you don't have to load a...
Is it possible to reference one CSS rule within another?
...ariable") instead of any part of a value of another property.
Example:
:root {
--main-bg-color: yellow;
}
@media (prefers-color-scheme: dark) {
:root {
--main-bg-color: black;
}
}
body {
background-color: var(--main-bg-color);
}
...
Getting the location from an IP address [duplicate]
...g JavaScript for client-side scripting, PHP for server-side scripting, and MySQL for the database.
23 Answers
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What is a stored procedure?
... For more detail about stored procedure you can refer my URL techflirt.com/mysql-stored-procedure-tutorial
– Ankur Kumar Singh
Mar 4 '18 at 5:25
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What in the world are Spring beans?
...e put the annotations in the Java file then Spring automatically scan the root-context where java configuration file, make it and put into the bag of Spring.
Here is the detail URI where you got more information about Beans
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