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Spring - @Transactional - What happens in background?
...rs injected via the proxy mechanism.
Transactions in EJB work similarly, by the way.
As you observed, through, the proxy mechanism only works when calls come in from some external object. When you make an internal call within the object, you're really making a call through the "this" reference, w...
Detecting a redirect in ajax request?
...portunity to NOT follow the redirect but you may resolve a number of tasks by using responseUrl property.
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differences in application/json and application/x-www-form-urlencoded
...a long query string.The query string contains name-
value pairs separated by & character
e.g. field1=value1&field2=value2
It can be simple request called simple - don't trigger a preflight check
Simple request must have some properties. You can look here for more info. One of
them is th...
Quit and restart a clean R session from within R?
... This solution works but is not reproducible when my script is run by others. Is there a command to be included in R script to restart R session? (the reason being I want all packages to be detached)
– Heisenberg
Oct 19 '14 at 20:04
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How to rollback just one step using rake db:migrate
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Best way is running Particular migration again by using down or up(in rails 4. It's change)
rails db:migrate:up VERSION=timestamp
Now how you get the timestamp.
Go to this path
/db/migrate
Identify migration file you want to revert.pick the timestamp from that...
XML schema or DTD for logback.xml?
...oint icon after you fix it, you might need to trigger the validation again by right-clicking the file and choosing Validate.
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Global variables in Java
...t a;
public static int b;
}
now you can access a and b from anywhere
by calling
Example.a;
Example.b;
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What is an abstract class in PHP?
... methods marked abstract in the parent's class declaration must be defined by the child :If you inherit an abstract class you have to provide implementations to all the abstract methods in it.
abstract class AbstractClass
{
// Force Extending class to define this method
abstract protected f...
LD_LIBRARY_PATH vs LIBRARY_PATH
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LIBRARY_PATH is used by gcc before compilation to search directories containing static and shared libraries that need to be linked to your program.
LD_LIBRARY_PATH is used by your program to search directories containing shared libraries after i...
Add a duration to a moment (moment.js)
... key point in the documentation for .add()
Mutates the original moment by adding time.
You appear to be treating it as a function that returns the immutable result. Easy mistake to make. :)
If you use the return value, it is the same actual object as the one you started with. It's just ret...