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Quit and restart a clean R session from within R?
...xec which would normally be used to open a file in the default application based on file type. When used on a .exe, apparently, it runs the executable. The important difference, though, is that the system starts the application in it's own separate context. So here's the code that works for me:
mak...
How to securely save username/password (local)?
...me and password, use the Rfc2898DerivedBytes class (also known as Password Based Key Derivation Function 2 or PBKDF2). This is more secure than using encryption like Triple DES or AES because there is no practical way to go from the result of RFC2898DerivedBytes back to the password. You can only g...
C# Object Pooling Pattern implementation
...Core
The dotnet core has an implementation of object pooling added to the base class library (BCL). You can read the original GitHub issue here and view the code for System.Buffers. Currently the ArrayPool is the only type available and is used to pool arrays. There is a nice blog post here.
names...
How do I check OS with a preprocessor directive?
I need my code to do different things based on the operating system on which it gets compiled. I'm looking for something like this:
...
How do I set up DNS for an apex domain (no www) pointing to a Heroku app?
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(Note: root, base, apex domains are all the same thing. Using interchangeably for google-foo.)
Traditionally, to point your apex domain you'd use an A record pointing to your server's IP. This solution doesn't scale and isn't viable for ...
Why is it necessary to set the prototype constructor?
... but it does have its uses. Suppose we wanted to make a copy method on the base Person class. Like this:
// define the Person Class
function Person(name) {
this.name = name;
}
Person.prototype.copy = function() {
// return new Person(this.name); // just as bad
return new this.con...
Streaming video from Android camera to server
...ting/figuring out), but so far I can only get it to connect from a Windows based browser (Chrome) with the vlc plugin. VLC on Android/iPad or any other rtsp player won't pick up the stream (one of them looked good, but was trying to get a stream based on the device name, which this code returned as ...
Is GET data also encrypted in HTTPS?
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The domain is not encrypted. This is to support name based virtual hosts (vs. IP based). @MarceloCantos is completely correct that the rest of the URL (i.e. the GET command) is encrypted. This is covered in RFC 4366
– hafichuk
Jul 11 '14 a...
Looking for jQuery find(..) method that includes the current node
...ve now is equivalent to .andSelf(). Lastly, the .andFind() doesn't filter based on the expression, you would need to .add($(this).filter(expr)) :)
– Nick Craver♦
May 13 '10 at 16:42
...
When should I use genetic algorithms as opposed to neural networks? [closed]
...d by changing a number of weights between them, attempt to predict outputs based on inputs.
They are two fundamentally different entities, but sometimes the problems they are capable of solving overlap.
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