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When to use actors instead of messaging solutions such as WebSphere MQ or Tibco Rendezvous?

...quire casting due to Scala's type system. Also in Java people don't typically make immutable objects which I recommend you do for messaging. Consequently its very easy in Java to accidentally do something using Akka that will not scale (using mutable objects for messages, relying on weird closure ...
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Concatenate multiple files but include filename as section headers

... Of note, passing -n to grep also yields line numbers which allows you to write simple linters with pinpointing that could be picked up by, e.g., emacs. – DepressedDaniel Mar 13 '17 at 3:23 ...
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In which scenario do I use a particular STL container?

I've been reading up on STL containers in my book on C++, specifically the section on the STL and its containers. Now I do understand each and every one of them have their own specific properties, and I'm close to memorizing all of them... But what I do not yet grasp is in which scenario each of the...
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log4j vs logback [closed]

...ments the SLF4J API. This means that if you are using logback, you are actually using the SLF4J API. You could theoretically use the internals of the logback API directly for logging, but that is highly discouraged. All logback documentation and examples on loggers are written in terms of the SLF4J ...
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How is CountDownLatch used in Java Multithreading?

...or n threads, specified while creating the CountDownLatch. Any thread, usually the main thread of the application, which calls CountDownLatch.await() will wait until count reaches zero or it's interrupted by another thread. All other threads are required to count down by calling CountDownLatch.coun...
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How to sort a list of strings?

What is the best way of creating an alphabetically sorted list in Python? 11 Answers 1...
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Difference between Bridge pattern and Adapter pattern

...that vastly predates the conversion to the Weapon interface. But we'd really like it to work here... so what do we do... wedge it in! NukeWeaponsAdaptor - based off of our Nuke class, but exporting the Weapon interface. Sweet, now we can surely destroy the world. It seems like bit of a kludg...
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Strange behavior for Map, parseInt [duplicate]

...string[, radix]); while map handler's second argument is index: ... callback is invoked with three arguments: the value of the element, the index of the element, and the Array object being traversed. share ...
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How to import a .cer certificate into a java keystore?

...the private key. The private key is provided with a .PFX keystore file normally. If you really authenticate is because you already had imported the private key. You normally can import .CER certificates without any problems with keytool -importcert -file certificate.cer -keystore keystore.jks -al...
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When to use nil, blank, empty? [duplicate]

... Here I made this useful table with all the cases share | improve this answer | follow | ...