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Virtual functions and performance - C++

In my class design, I use abstract classes and virtual functions extensively. I had a feeling that virtual functions affects the performance. Is this true? But I think this performance difference is not noticeable and looks like I am doing premature optimization. Right? ...
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What is the use of interface constants?

I am learning Java and just found that the Interface can have fields, which are public static and final. I haven't seen any examples of these so far. What are some of the use cases of these Interface Constants and can I see some in the Java Standard Library? ...
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Comparison of CI Servers? [closed]

...of different continuous integration (CI) Servers (esp. focusing on .NET) and couldn't find any. 13 Answers ...
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Why is using onClick() in HTML a bad practice?

...e it's not good for semantics. I would like to know what the downsides are and how to fix the following code? 10 Answers ...
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AngularJS: Understanding design pattern

...pps: Controller Controller should be just an interlayer between model and view. Try to make it as thin as possible. It is highly recommended to avoid business logic in controller. It should be moved to model. Controller may communicate with other controllers using method invocation (possible wh...
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What is the difference between a schema and a table and a database?

... but not wrong; but do you really think a selfproclaimed n00b would understand that? – Stein G. Strindhaug Nov 18 '08 at 13:49 6 ...
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When to use CouchDB over MongoDB and vice versa

...Quick reference, the Visual Guide To NoSQL Systems MongodB : Consistency and Partition Tolerance CouchDB : Availability and Partition Tolerance A blog post, Cassandra vs MongoDB vs CouchDB vs Redis vs Riak vs HBase vs Membase vs Neo4j comparison has 'Best used' scenarios for each NoSQL database ...
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How do I write stderr to a file while using “tee” with a pipe?

... I'm assuming you want to still see STDERR and STDOUT on the terminal. You could go for Josh Kelley's answer, but I find keeping a tail around in the background which outputs your log file very hackish and cludgy. Notice how you need to keep an exra FD and do cleanu...
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How should I have explained the difference between an Interface and an Abstract class?

...rviews, I have been asked to explain the difference between an Interface and an Abstract class . 30 Answers ...
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How to re-sync the Mysql DB if Master and slave have different database incase of Mysql replication?

... master: RESET MASTER; FLUSH TABLES WITH READ LOCK; SHOW MASTER STATUS; And copy the values of the result of the last command somewhere. Without closing the connection to the client (because it would release the read lock) issue the command to get a dump of the master: mysqldump -u root -p --al...