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What is the proper way to re-attach detached objects in Hibernate?
...ale detached entity in JPA.
merge() will push the stale state to the DB,
and overwrite any intervening updates.
refresh() cannot be called on a detached entity.
lock() cannot be called on a detached entity,
and even if it could, and it did reattach the entity,
calling 'lock' with argument 'LockM...
Deleting queues in RabbitMQ
... about the data in management database; i.e. users, vhosts, messages etc., and neither about other queues, then you can reset via commandline by running the following commands in order:
WARNING: In addition to the queues, this will also remove any users and vhosts, you have configured on your Ra...
GitHub Windows client behind proxy
...s working. I am on a corporate Win 7 x64 computer behind a corporate proxy and firewall. Following various other posts and experimenting with multiple combinations of environment variables and config variables I have found the only way to get cloning and push updates to work is by using the HTTPS_PR...
What is “loose coupling?” Please provide examples
... uses a CartContents class to keep track of the items in the shopping cart and an Order class for processing a purchase. The Order needs to determine the total value of the contents in the cart, it might do that like so:
Tightly Coupled Example:
public class CartEntry
{
public float Price;
...
What is the canonical way to check for errors using the CUDA runtime API?
Looking through the answers and comments on CUDA questions, and in the CUDA tag wiki , I see it is often suggested that the return status of every API call should checked for errors. The API documentation contains functions like cudaGetLastError , cudaPeekAtLastError , and cudaGetErrorString , b...
How can I prevent the “You have mixed tabs and spaces. Fix this?” message?
...time I paste code into my .cs file, I get the dreaded "You have mixed tabs and spaces. Fix this?" message. It has three options:
...
How to calculate date difference in JavaScript?
... milliseconds to years. You must be aware of bissextile year, of timezone, and some days have 23 or 25 hours. Some years have 365,25 days, so there is no simple arithmetic here (still looking for an accurate solution).
– Alexandre Salomé
May 20 '14 at 12:50
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How do I write a bash script to restart a process if it dies?
I have a python script that'll be checking a queue and performing an action on each item:
8 Answers
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Notepad++ Multi editing
...
Yes: simply press and hold the Alt key, click and drag to select the lines whose columns you wish to edit, and begin typing.
You can also go to Settings > Preferences..., and in the Editing tab, turn on multi-editing, to enable selection o...
Why does sun.misc.Unsafe exist, and how can it be used in the real world?
I came across the sun.misc.Unsafe package the other day and was amazed at what it could do.
16 Answers
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