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Lock, mutex, semaphore… what's the difference?
...n notification, recursion?, 'priority inversion avoidance'?, etc].
4) And now, talking about 'spinlocks', first some definitions:
Critical Region= A region of memory shared by 2 or more processes.
Lock= A variable whose value allows or denies the entrance to a 'critical region'. (It could be impl...
Will HTML5 allow web apps to make peer-to-peer HTTP connections?
...
UPDATE 10/17/2012: This functionality now exists in Chrome Stable v22. In order to use this functionality in Chrome, one must enable two flags in chrome://flags:
Enable MediaStream
Enable PeerConnection
Then you can visit the AppRTC Demo Page to try out the d...
How to use the ProGuard in Android Studio?
... I have tested changing the debug to runProguard true and works perfectly. Now I read your reply, and works!!!! Great man! Thank you.
– Felipe Porge Xavier
Jan 2 '14 at 18:14
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How to test if a dictionary contains a specific key? [duplicate]
...d it helped a lot, but I was wondering - are you able to accept the answer now, 4.5yrs later?:) Or it can't be marked anymore due to the duplicate label?
– Michal
Dec 18 '15 at 14:24
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Do HTML5 Script tag need type=“javascript”? [duplicate]
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No, it's now officially useless.
The type attribute gives the language of the script or format of the
data. If the attribute is present, its value must be a valid MIME
type. The charset parameter must not be specified. The def...
How Can I Set the Default Value of a Timestamp Column to the Current Timestamp with Laravel Migratio
...by Laravel when accessing timestamps. To fix for PostgreSQL, use: DB::raw('now()::timestamp(0)') (reference: postgresql.org/docs/8.1/static/…)
– andrewhl
Aug 11 '14 at 20:37
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Android accelerometer accuracy (Inertial navigation)
...which would be pretty limiting. No one reads the TOS anyway.
Oh, and you know that INS drifts with the rotation of the earth, right? So there's that too. One hour later and you're mysteriously climbing on a 15° slope into space. That's assuming you had an INS capable of maintaining location that l...
How can I extract embedded fonts from a PDF as valid font files?
...r example by using XPDF's pdftops (on Windows: pdftops.exe helper program.
Now fonts will be embedded in .pfa (PostScript) format + you can extract them using a text editor.
You may need to convert the .pfa (ASCII) to a .pfb (binary) file using the t1utils and pfa2pfb.
In PDFs there are never .pfm o...
Loop through an array in JavaScript
...e this:
var x = [1,2,3,4].map( function(item) {return item * 10;});
And now x is [10,20,30,40].
You don't have to write the function inline. It could be a separate function.
var item_processor = function(item) {
// Do something complicated to an item
}
new_list = my_list.map(item_process...
SQLAlchemy: What's the difference between flush() and commit()?
... # been flushed yet.
s2.flush() # Now, Foo('B') is in the same state as
# Foo('A') was above.
print 3, s2.query(Foo).all()
s2.rollback() # Foo('B') has not been committed, and rolling
...