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Create singleton using GCD's dispatch_once in Objective-C
...e instance. What if that singleton decrement a semaphore? You can't just arbitrary say that it will always exists.
– jacekmigacz
Jan 25 '13 at 13:40
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Node.js on multi-core machines
...naging the flow of events and N processes doing heavy compute tasks and chewing up the other 15 CPUs.
For scaling throughput on a webservice, you should run multiple Node.js servers on one box, one per core and split request traffic between them. This provides excellent CPU-affinity and will scale t...
C++: what regex library should I use? [closed]
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Does Java 8 provide a good way to repeat a value or function?
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@jwenting It really depends - typically with GUI stuff (Swing or JavaFX), that removes a lot of boiler plate due to anonymous classes.
– assylias
Aug 30 '13 at 12:12
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Wolfram's Rule 34 in XKCD [closed]
...ge in a cellular automaton (CA) that follows rule 2, then whenever a three-bit string matches rule 2's configuration, the center bit becomes (or stays, in this case) true on the next iteration.
A CA's rules are described as a bitstring. Say it's rule 110 (my favorite). In binary, 110 is 01101110. T...
Convert PDF to clean SVG? [closed]
...tps://bitbucket.org/petermr/ami-core . This is a funded project to capture 100 million facts from the scientific literature (contentmine.org) much of which is PDF.
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doGet and doPost in Servlets
...les — which is NOT threadsafe). So I would strongly recommend to learn a bit more about basic Java SE API using the Oracle tutorials (check the chapter "Trails Covering the Basics") and how to use JSP/Servlets the right way using those tutorials.
See also:
Our servlets wiki page
Java EE web dev...
Convert java.util.Date to String
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If executing this code a very large number of times, you may want to be a bit more efficient and avoid the call to String::replace. Dropping that call also makes your code shorter. If so desired, specify your own formatting pattern in your own DateTimeFormatter object. Cache this instance as a cons...
Arguments or parameters? [duplicate]
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@Liam: A bit late here, but: args is a parameter, but its contents are the arguments that were passed in on the command line to start the program. Calling it parameters would be incorrect because while the variable itself (in the meth...
String formatting: % vs. .format vs. string literal
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Something that the modulo operator ( % ) can't do, afaik:
tu = (12,45,22222,103,6)
print '{0} ...