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Using Java 8's Optional with Stream::flatMap
...n the API, in that it's somewhat inconvenient to turn an Optional<T> into a zero-or-one length Stream<T>. You could do this:
Optional<Other> result =
things.stream()
.map(this::resolve)
.flatMap(o -> o.isPresent() ? Stream.of(o.get()) : Stream.empty())
...
Wrapping synchronous code into asynchronous call
...
I found that the following code can convert a Task to always run asynchronously
private static async Task<T> ForceAsync<T>(Func<Task<T>> func)
{
await Task.Yield();
return await func();
}
and I have used it in the following ma...
How to vertically center a container in Bootstrap?
...lt;p><strong>Redirect</strong><br>Visitors where they converts more.</p>
</li>
<li>
<span><i class="fa fa-cogs simple_bg top-features-bg"></i></span>
<p><strong>Track</strong...
Use numpy array in shared memory for multiprocessing
...
Good point about order of operations. That's what I had in mind, though: create a user-specified number of shared arrays, then spawn a few child processes. Is that straightforward?
– Andrew
Jan...
What is the difference between \r and \n?
... transmitted as-is. But in text mode, there's a run-time translation that converts a special character to whatever the host platform needs for a new line (and vice versa).
Great, so what's the special character?
Well, that's implementation dependent, too, but there's an implementation-independent...
Why does the MongoDB Java driver use a random number generator in a conditional?
...p;& Math.random() <= 0.1)
return res;
The commit that originally introduced this logic had
if (_ok == true) {
_logger.log( Level.WARNING , "Server seen down: " + _addr, e );
} else if (Math.random() < 0.1) {
_logger.log( Level.WARNING , "Server seen down: " + _addr );
}
—anothe...
Change key pair for ec2 instance
... you will want to edit the authorized_keys file on the instance itself and convert to your new ssh public key.
The authorized_keys file is under the .ssh subdirectory under the home directory of the user you are logging in as. Depending on the AMI you are running, it might be in one of:
/home/ec2...
Change color of PNG image via CSS?
...urns the needed filter to apply this color to png
CSS filter generator to convert from black to target hex color
for example i needed my png to have the following color #1a9790
then you have to apply the following filter to you png
filter: invert(48%) sepia(13%) saturate(3207%) hue-rotate(130deg...
How does facebook, gmail send the real time notification?
...sleading -- last i heard, they developed HipHop for the express purpose of converting PHP to C++, as PHP wasn't performing well enough.
– cHao
Oct 16 '11 at 7:14
...
Why does 'continue' behave like 'break' in a Foreach-Object?
...re is a gotcha to be kept in mind when refactoring. Sometimes one wants to convert a foreach statement block into a pipeline with a ForEach-Object cmdlet (it even has the alias foreach that helps to make this conversion easy and make mistakes easy, too). All continues should be replaced with return....