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Singletons vs. Application Context in Android?
...believe that if you do need to manage app-global state, it should go here, nowhere else. For anything else, rethink if you really need a singleton object, or if it would also be possible to rewrite your singleton class to instead instantiate small, short-lived objects that perform the task at hand.
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How do I make the return type of a method generic?
...this method generic so I can return a string, bool, int, or double? Right now, it's returning a string, but if it's able find "true" or "false" as the configuration value, I'd like to return a bool for example.
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unit testing of private functions with mocha and node.js
... or something else that can communicate to the module "you're being tested now". The instances where I've had to do this were in a RequireJS environment, and I've used module.config for this purpose.
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What is the purpose of the “final” keyword in C++11 for functions?
... of the language in a way that could cause any problem, so I don't really know how usefull that error might be. On the contrary, forgetting the virtual can cause errors, and C++11 added the override tag to a function that will detect that situation and fail to compile when a function that is meant t...
Cassandra port usage - how are the ports used?
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JMX now uses port 7199 instead of port 8080 (as of Cassandra 0.8.xx).
This is configurable in your cassandra-env.sh file, but the default is 7199.
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Meaning of = delete after function declaration
...tion is a C++11 feature:
The common idiom of "prohibiting copying" can now be expressed
directly:
class X {
// ...
X& operator=(const X&) = delete; // Disallow copying
X(const X&) = delete;
};
[...]
The "delete" mechanism can be used for any function. For e...
can we use xpath with BeautifulSoup?
... Martijn's code no longer works properly (it is 4+ years old by now...), the etree.parse() line prints to the console and doesn't assign the value to the tree variable. That's quite a claim. I certainly can't reproduce that, and it would not make any sense. Are you sure you are using Pyth...
How to create a library project in Android Studio and an application project that uses the library p
...which to use it. After this I add the module dependency (in Andr. Studio). Now I can use/edit the module in each project while keeping is in sync. Not sure if it is the right way to go, but for now it seems to work quite well! This works better than a local maven repo.
– Peter
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NGINX to reverse proxy websockets AND enable SSL (wss://)?
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Just to note that nginx has now support for Websockets on the release 1.3.13. Example of use:
location /websocket/ {
proxy_pass http://backend_host;
proxy_http_version 1.1;
proxy_set_header Upgrade $http_upgrade;
proxy_set_header Co...
Using a piano keyboard as a computer keyboard [closed]
...played piano for around 20 years without any pain issues. I would like to know if there is a way to capture MIDI from a MIDI keyboard and output keyboard strokes. I know nothing at all about MIDI but I would like some guidance on how to convert this signal into a keystroke.
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