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MySQL Results as comma separated list
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Now only I came across this situation and found some more interesting features around GROUP_CONCAT. I hope these details will make you feel interesting.
simple GROUP_CONCAT
SELECT GROUP_CONCAT(TaskName)
FROM Tasks;
Resul...
When should one use a spinlock instead of mutex?
...y'll need quite a lot of CPU instructions and thus also take some time. If now the mutex was only locked for a very short amount of time, the time spent in putting a thread to sleep and waking it up again might exceed the time the thread has actually slept by far and it might even exceed the time th...
The new syntax “= default” in C++11
...};
In the above case, the copy constructor written with an empty body is now wrong. It's no longer actually copying anything. This is a very different set of semantics than the default copy constructor semantics. The desired behavior requires you to write some code:
struct S {
int a;
S()...
When to use Mockito.verify()?
...ts of other available literature. If you see how it might differ, let me know, and maybe we can work on it together.
– Dawood ibn Kareem
Sep 22 '12 at 4:50
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Why create “Implicitly Unwrapped Optionals”, since that implies you know there's a value?
...wrapped Optional" vs creating just a regular variable or constant?
If you know that it can be successfully unwrapped then why create an optional in the first place?
For example, why is this:
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What is the difference between “Rollback…” and “Back Out Submitted Changelist #####” in Perforce P4V
...en made to any of those files, Perforce will tell you that those files are now out of date. You will have to sync to the head revision and then resolve the differences. This way you don't inadvertently clobber any changes that you actually want to keep.
Both operations work by essentially submitt...
Show data on mouseover of circle
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I like tipsy. My only issue now is that it points to the upper left corner of the circle, rather than the edge as in that demo. I'm not finding any obvious reason why. jsfiddle.net/scottieb/JwaaV (tipsy at very bottom)
– ScottieB...
initializer_list and move semantics
... const initializer_list at the compiler's discretion, so the user doesn't know whether to expect a const or mutable result from begin and end. But that's just my gut feeling, probably there's a good reason I'm wrong.
Update: I've written an ISO proposal for initializer_list support of move-only typ...
When to use Tornado, when to use Twisted / Cyclone / GEvent / other [closed]
...ate engine by default, you are always free to choose our own. As far as I know Flask comes in handy for writing APIs endpoints (RESTful services).
"Twisted is an event-driven networking engine written in python". This is a high-performance engine. The main reason for its speed is something called a...
Clone private git repo with dockerfile
...ey was password protected which was causing the problem, a working file is now listed below (for help of future googlers)
FROM ubuntu
MAINTAINER Luke Crooks "luke@pumalo.org"
# Update aptitude with new repo
RUN apt-get update
# Install software
RUN apt-get install -y git
# Make ssh dir
RUN mkdi...