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Do HTML WebSockets maintain an open connection for each client? Does this scale?
I am curious if anyone has any information about the scalability of HTML WebSockets. For everything I've read it appears that every client will maintain an open line of communication with the server. I'm just wondering how that scales and how many open WebSocket connections a server can handle. Mayb...
How can I initialise a static Map?
...tic {
Map<Integer, String> aMap = ....;
aMap.put(1, "one");
aMap.put(2, "two");
myMap = Collections.unmodifiableMap(aMap);
}
}
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Copying files from one directory to another in Java
I want to copy files from one directory to another (subdirectory) using Java. I have a directory, dir, with text files. I iterate over the first 20 files in dir, and want to copy them to another directory in the dir directory, which I have created right before the iteration.
In the code, I want to c...
In a PHP project, what patterns exist to store, access and organize helper objects? [closed]
....html
http://googletesting.blogspot.com/2008/08/where-have-all-singletons-gone.html
Alternatives
a service provider
http://java.sun.com/blueprints/corej2eepatterns/Patterns/ServiceLocator.html
dependency injection
http://en.wikipedia.org/wiki/Dependency_injection
and a php explanation:
http:/...
Calculate relative time in C#
...(ts.TotalSeconds);
if (delta < 1 * MINUTE)
return ts.Seconds == 1 ? "one second ago" : ts.Seconds + " seconds ago";
if (delta < 2 * MINUTE)
return "a minute ago";
if (delta < 45 * MINUTE)
return ts.Minutes + " minutes ago";
if (delta < 90 * MINUTE)
return "an hour ago";
if (...
Why is it a bad practice to return generated HTML instead of JSON? Or is it?
... going to make the biggest difference (not choosing between HTML and JSON)
One thing that could be taken into consideration, though, is what resources you'll need on the client to recreate the HTML (or the DOM structure) from the JSON data... compare that to pushing a portion of HTML into the page ;...
Convert a Python list with strings all to lowercase or uppercase
...ns strings. Is there a python function that can convert all the strings in one pass to lowercase and vice versa, uppercase?
...
What's the difference between an inverted index and a plain old index?
...
One common use is "...to allow fast full-text searching."
The two types denote directionality. One takes you forward through the index, and the other takes you backward (the inverse) through the index. That's it. There's no...
LINQ: Not Any vs All Don't
Often I want to check if a provided value matches one in a list (e.g. when validating):
8 Answers
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Change One Cell's Data in mysql
How can I change the data in only one cell of a mysql table.
I have problem with UPDATE because it makes all the parameters in a column change but I want only one changed. How?
...