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How can I make a div stick to the top of the screen once it's been scrolled to?
...s been scrolled enough to contact its top boundary, becomes fixed in place and scrolls with the page.
21 Answers
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When should one use RxJava Observable and when simple Callback on Android?
...e getUserPhoto example:
RxJava:
api.getUserPhoto(photoId)
.observeOn(AndroidSchedulers.mainThread())
.subscribe(new Action1<Photo>() {
@Override
public void call(Photo photo) {
// do some stuff with your photo
}
});
Callback:...
Why is std::map implemented as a red-black tree?
...bly the two most common self balancing tree algorithms are Red-Black trees and AVL trees. To balance the tree after an insertion/update both algorithms use the notion of rotations where the nodes of the tree are rotated to perform the re-balancing.
While in both algorithms the insert/delete operat...
How can I install pip on Windows?
...
Python 2.7.9+ and 3.4+
Good news! Python 3.4 (released March 2014) and Python 2.7.9 (released December 2014) ship with Pip. This is the best feature of any Python release. It makes the community's wealth of libraries accessible to everyon...
What is the correct way to make a custom .NET Exception serializable?
...lizable]
// Important: This attribute is NOT inherited from Exception, and MUST be specified
// otherwise serialization will fail with a SerializationException stating that
// "Type X in Assembly Y is not marked as serializable."
public class SerializableExceptionWithoutCustomProper...
CPU Privilege Rings: Why rings 1 and 2 aren't used?
...the modern protection model) only has a concept of privileged (ring 0,1,2) and unprivileged, the benefit to rings 1 and 2 were diminished greatly.
The intent by Intel in having rings 1 and 2 is for the OS to put device drivers at that level, so they are privileged, but somewhat separated from the r...
What are good message queue options for nodejs? [closed]
...appropriate. The goal is to push notifications to clients based on backend and other client actions with socketio. I could do this with just socketio but I thought maybe a proper message queue would make this cleaner and I wouldn't have to reinvent the wheel.
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How to revert uncommitted changes including files and folders?
Is there a git command to revert all uncommitted changes in a working tree and index and to also remove newly created files and folders?
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Semaphore vs. Monitors - what's the difference?
What are the major differences between a Monitor and a Semaphore ?
6 Answers
6
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Get key by value in dictionary
I made a function which will look up ages in a Dictionary and show the matching name:
34 Answers
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