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How to fix PCH error?
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This is often a caching problem. Usually it can be resolved by holding down the Option key and choosing Product > Clean Build Folder...
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WebSockets vs. Server-Sent events/EventSource
...dition, Server-Sent Events have a variety of features that WebSockets lack by design such as automatic reconnection, event IDs, and the ability to send arbitrary events.
TLDR summary:
Advantages of SSE over Websockets:
Transported over simple HTTP instead of a custom protocol
Can be poly-fill...
How to use ConcurrentLinkedQueue?
...eads accessing the queue at the same time. Your needs will probably be met by using:
Queue<YourObject> queue = Collections.synchronizedList(new LinkedList<YourObject>());
A plus of this is that it locks on the instance (queue), so you can synchronize on queue to ensure atomicity of comp...
FileSystemWatcher Changed event is raised twice
...a single creation event generates multiple Created events that are handled by your component. For example, if you use a FileSystemWatcher component to monitor the creation of new files in a directory, and then test it by using Notepad to create a file, you may see two Created events generated even t...
Magic number in boost::hash_combine
...ject v . According to the docs , it combines seed with the hash of v by
2 Answers
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Global variables in AngularJS
...blem with it is that the controller that initialises it, gets called again by angular some how and then resets the variable back to its initial value.
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How do I check if a string contains another string in Swift?
...olution since some people, including me, encountered some strange problems by calling containsString().1
PS. Don't forget to import Foundation
Footnotes
Just remember that using collection functions on Strings has some edge cases which can give you unexpected results, e. g. when dealing with emo...
How do emulators work and how are they written? [closed]
...ions so I can continue to improve this answer.
Basic idea:
Emulation works by handling the behavior of the processor and the individual components. You build each individual piece of the system and then connect the pieces much like wires do in hardware.
Processor emulation:
There are three ways of ...
How can I use Spring Security without sessions?
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@workerjoe So, what you are trying to say by this java configuration, the sessions are not created by spring security rather tomcat?
– Vishwas Atrey
May 8 at 20:50
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Client-server synchronization pattern / algorithm?
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^^^^^^ this is by far the best answer, guys!
– hgoebl
Sep 18 '17 at 14:58
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