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Possibility of duplicate Mongo ObjectId's being generated in two different collections?
...ing in Mongo itself, it is possible to have duplicate _id's generated with PHP in Mongo.
The use-case where this has happened with regularity for me is when I'm looping through a dataset and attempting to inject the data into a collection.
The array that holds the injection data must be explicitl...
Remove white space below image [duplicate]
... element by default. This removes the gap:
.youtube-thumb img { display: block; }
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Handle Guzzle exception and get HTTP body
...ttp\Psr7\Response
* (find it in ./vendor/guzzlehttp/psr7/src/Response.php) with all
* its own and its 'Message' trait's methods. See more explanations below.
*
* So you can have: HTTP status code, message, headers and body.
* Just check the exception object has the response ...
Are there legitimate uses for JavaScript's “with” statement?
...b excitedly and found an existing mention of it: Defining Variables inside Block Scope.
Background
JavaScript, in spite of its superficial resemblance to C and C++, does not scope variables to the block they are defined in:
var name = "Joe";
if ( true )
{
var name = "Jack";
}
// name now contains...
await vs Task.Wait - Deadlock?
...conceptually - are actually completely different.
Wait will synchronously block until the task completes. So the current thread is literally blocked waiting for the task to complete. As a general rule, you should use "async all the way down"; that is, don't block on async code. On my blog, I go int...
将 App Inventor 2 项目连接到外部传感器 · App Inventor 2 中文网
...work was provided by Google ATAP
Introduction
App Inventor is a visual “blocks” based language for programming Android apps. It gives users the ability to easily learn, create, and prototype in a plug-and-play environment by connecting various blocks of code.
Currently, AppInventor’s toolset...
C++ performance vs. Java/C#
...uch more tools suited for the task). Show a program that manipulates large blocks of memory in comparison, like a large-scale matrix/vector code. That'll settle this quite quickly even if, as in this case, the coders don't know what...
– stinky472
Feb 28 '12 at...
Can I do a synchronous request with volley?
...ue.add(request);
try {
JSONObject response = future.get(); // this will block
} catch (InterruptedException e) {
// exception handling
} catch (ExecutionException e) {
// exception handling
}
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IllegalMonitorStateException on wait() call
...
You need to be in a synchronized block in order for Object.wait() to work.
Also, I recommend looking at the concurrency packages instead of the old school threading packages. They are safer and way easier to work with.
Happy coding.
EDIT
I assumed you m...
How to insert a line break before an element using CSS
...f a line.
p.s. Another treatment to be
:before { content: ' '; display: block; }
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