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ctypes - Beginner
...the non-python part of the tutorial. Make sure ctypes can find the library by putting it in /usr/lib or another standard directory. If you do this, you don't need to specify the full path when writing the wrapper. If you choose not to do this, you must provide the full path of the library when calli...
What is the benefit of using “SET XACT_ABORT ON” in a stored procedure?
...ient application rather than within SQL Server itself (which isn't covered by the default XACT_ABORT OFF setting.)
Since a query timeout will leave the transaction open, SET XACT_ABORT ON is recommended in all stored procedures with explicit transactions (unless you have a specific reason to do oth...
Find all records which have a count of an association greater than zero
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joins uses an inner join by default so using Project.joins(:vacancies) will in effect only return projects that have an associated vacancy.
UPDATE:
As pointed out by @mackskatz in the comment, without a group clause, the code above will return dupl...
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...
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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socket.error: [Errno 48] Address already in use
...for local files.
The second number is the process number; stop the server by sending it a signal:
kill 81651
This sends a standard SIGTERM signal; if the process is unresponsive you may have to resort to tougher methods like sending a SIGKILL (kill -s KILL <pid> or kill -9 <pid>) sig...
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...
Java heap terminology: young, old and permanent generations?
...ng before a mention. Then in Java 8 permanent generation will get replaced by metaspace (although I'm not sure how different this will really be, other than being unbounded by default)
– Joshua McKinnon
Sep 23 '13 at 18:30
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