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Get type of all variables
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Create your own custom R function that you keep around in your tool box that takes a parameter x. Inside the function use if statements to check if the typeof(x) is numeric and if the class(x) is a vector. If so, print the string: "x is exa...
What is the “FS”/“GS” register intended for?
...00 was finished and mainly intended for the embedded world to keep 8080/85 customers on board.
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How to Implement DOM Data Binding in JavaScript
...ters, particularly setters only. Generally speaking, mutators allow us to "customize" the behavior of how certain properties are assigned a value and retrieved.
One implementation I'll be using here is the Object.defineProperty method. It works in FireFox, GoogleChrome and - I think - IE9. Haven't ...
Position icons into circle
...and therefore the tangent of half the base angle, precomputed and set as a custom property --tan) and the polygon edge. We probably want the polygon edge to be a least the size of the images, but how much we leave on the sides is arbitrary. Let's say we have half the image size on each side, so the ...
What is the difference between server side cookie and client side cookie?
...er, but if somebody would use a ridiculously old browser like IE5, or some custom client, they can actually read the cookie!
So it seems like there are 'server cookies', but there are actually not. Those cookies are still sent to the client. On the client there is no way to prevent a cookie from be...
prototype based vs. class based inheritance
...rn]. Self suffers from neither of these disadvantages. Any object
can be customized with its own behavior. A unique object can hold the
unique behavior, and a separate "instance" is not needed.
Elimination of meta-regress. No object in a class-based system can be self-sufficient; another ob...
SHA1 vs md5 vs SHA256: which to use for a PHP login?
...t to securely hash user password in your database for 2 reasons; first the customer is trusting you with their password, which they may or may not use on other sites, so you want to make sure this is not recoverable, even if you db is compromised, second, you want to remove liability in case of secu...
Apache Spark: map vs mapPartitions?
... sequential stream of values via the input argument (Iterarator[T]).
The custom function must return yet another Iterator[U]. The combined
result iterators are automatically converted into a new RDD. Please
note, that the tuples (3,4) and (6,7) are missing from the following
result due to th...
How to access property of anonymous type in C#?
...d(args))
{
...
...
}
Adapted from somewhere on stackoverflow:
// Use a custom cast extension
public static T CastTo<T>(this Object x, T targetType)
{
return (T)x;
}
Now get back the object via cast:
public partial class frmFind: Form
{
public frmFind(object arguments)
{
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STL or Qt containers?
...s often needed.
STL containers have an Allocator template argument, making custom memory management trivial (typedef required), compared with Qt (fork of QLineEdit required for s/QString/secqstring/). EDIT 20171220: This cuts Qt off of advances in allocator design following C++11 and C++17, cf. e.g....