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What does T&& (double ampersand) mean in C++11?

I've been looking into some of the new features of C++11 and one I've noticed is the double ampersand in declaring variables, like T&& var . ...
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Final arguments in interface methods - what's the point?

In Java, it is perfectly legal to define final arguments in interface methods and do not obey that in the implementing class, e.g.: ...
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CSS filter: make color image with transparency white

I have a colored png image with transparency. I would like to use css filter to make the whole image white but leave the transparency as it is. Is that possible in CSS? ...
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Why is Maven downloading the maven-metadata.xml every time?

Below is the error I usually get when my internet connection is flanky when trying to build a web application with maven. ...
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How to declare or mark a Java method as deprecated?

I would like to make one of my methods "deprecated" = not used anymore. 6 Answers 6 ...
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How to gracefully handle the SIGKILL signal in Java

How do you handle clean up when the program receives a kill signal? 5 Answers 5 ...
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Best way to get child nodes

I was wondering, JavaScript offers a variety of methods to get the first child element from any element, but which is the best? By best, I mean: most cross-browser compatible, fastest, most comprehensive and predictable when it comes to behaviour. A list of methods/properties I use as aliases: ...
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In MySQL queries, why use join instead of where?

It seems like to combine two or more tables, we can either use join or where. What are the advantages of one over the other? ...
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Using mixins vs components for code reuse in Facebook React

I'm beginning to use Facebook React in a Backbone project and so far it's going really well. However, I noticed some duplication creeping into my React code. ...
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Why can't the C# constructor infer type?

Why is type inference not supported for constructors the way it is for generic methods? 5 Answers ...