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Redis is single-threaded, then how does it do concurrent I/O?
...-threaded event loop. The interesting point is atomicity is provided at no extra cost (it does not require synchronization). It can be exploited by the user to implement optimistic locking and other patterns without paying for the synchronization overhead.
...
SQL Server Output Clause into a scalar variable
...ECT @someInt = ID FROM @ID". I wanted to know if its possible to skip that extra step (and intermediary table variable) if all I need is the resulting int.
– Benoittr
Apr 5 '11 at 21:33
...
Unique BooleanField value in Django?
..., self).save(*args, **kwargs)
@Ellis Percival: Hits the database only one extra time and accepts the current entry as the chosen one. Clean and elegant.
from django.db import transaction
class Character(models.Model):
name = models.CharField(max_length=255)
is_the_chosen_one = models.Bool...
Batch file to delete files older than N days
...amples with hundreds of lines of code, and others that required installing extra command line utilities to accomplish the task.
...
How can I merge properties of two JavaScript objects dynamically?
... JoachimLou's comment has received well deserved upvotes and provides that extra information when needed. I think the difference between deep and shallow merging and similar topics are beyond the scope of this discussion and are better suited to other SO questions.
– NanoWizard...
No newline at end of file
...l human-readable text files ending in a newline. At the time, this avoided extra processing when displaying or joining text files, and avoided treating text files differently to files containing other kinds of data (eg raw binary data which isn't human-readable).
Because of this convention, many to...
Android: I am unable to have ViewPager WRAP_CONTENT
...e super.onMeasure(widthMeasureSpec, heightMeasureSpec); call. Putting the extra super.onMeasure() call at the start of this function did the trick. Also check stackoverflow.com/questions/38492210/…
– southerton
Aug 17 '16 at 11:30
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How does “do something OR DIE()” work in PHP?
...'s with statement, when it's actually just a boolean expression... I think extra care should be taken when using this expression if you're expected to perform a cleanup in case of errors. Please, correct me if I'm wrong, but if you do func_call($file) or die(); and the function fails, then the file ...
Table Header Views in StoryBoards
...heightForHeaderInSection:(NSInteger)section code otherwise I'd end up with extra space above the header view itself. Also, in order for this header to "stick" at the top of the table view, I had to implement viewForHeaderInSection:(NSInteger)section and return this view.
– ozz
...
Error :Request header field Content-Type is not allowed by Access-Control-Allow-Headers
...rigin to *, but it appears that recent versions of Chrome are requiring an extra header. Try prepending the following to your file if you are using PHP:
header("Access-Control-Allow-Origin: *");
header("Access-Control-Allow-Headers: Origin, X-Requested-With, Content-Type, Accept");
Make sure tha...