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Can I set an opacity only to the background image of a div?

... add a comment or a little update to your question, informing that this is now the new good way to do it. See you in 4 years for a new update ;) – jj_ Dec 17 '15 at 11:48 ...
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What is the difference between “#!/usr/bin/env bash” and “#!/usr/bin/bash”?

... At least you have to know where env is :). – ᐅdevrimbaris Mar 22 '16 at 8:50 1 ...
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Apache Kafka vs Apache Storm

...ions on real time data in parallel. The common flow of these tools (as I know it) goes as follows: real-time-system --> Kafka --> Storm --> NoSql --> BI(optional) So you have your real time app handling high volume data, sends it to Kafka queue. Storm pulls the data from kafka and app...
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Byte order mark screws up file reading in Java

...</ul></p> * * <p>Use the {@link #getBOM()} method to know whether a BOM has been detected * or not. * </p> * <p>Use the {@link #skipBOM()} method to remove the detected BOM from the * wrapped <code>InputStream</code> object.</p> */ public class...
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vector::at vs. vector::operator[]

I know that at() is slower than [] because of its boundary checking, which is also discussed in similar questions like C++ Vector at/[] operator speed or ::std::vector::at() vs operator[] << surprising results!! 5 to 10 times slower/faster! . I just don't understand what the at() met...
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Determine file creation date in Java

...n time and discusses obtaining it via the new nio classes - it seems right now in JDK7's implementation you're out of luck. Addendum: same behaviour is in OpenJDK7. On Unix filesystems you cannot retrieve the creation timestamp, you simply get a copy of the last modification time. So sad, but unfor...
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How does the “this” keyword work?

...meters of fun bound to the parameters specified arg1, arg2, arg3,.... By now the difference between apply, call and bind must have become apparent. apply allows to specify the arguments to function as array-like object i.e. an object with a numeric length property and corresponding non-negative in...
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When should I use C++ private inheritance?

... +1 Iraimbilanja, very cool! BTW I saw your earlier comment (now deleted) about using the CRTP: I think that should in fact work, it's just tricky to get the syntax for template friends right. But in any case your non-template solution is much more awesome :) – j_...
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Python - Create a list with initial capacity

...;< name << ": "; auto start = chrono::high_resolution_clock::now(); for (unsigned int i = 0; i < Iterations; ++i) { fn(); } auto end = chrono::high_resolution_clock::now(); auto elapsed = end - start; cout << chrono::duration<double, milli>(e...
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Use 'import module' or 'from module import'?

... No, in the last example, the name 'foo' is unknown – Ghislain Leveque Jan 11 '16 at 13:59 33 ...