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Media Queries - In between two widths

I'm trying to use CSS3 media queries to make a class that only appears when the width is greater than 400px and less than 900px. I know this is probably extremely simple and I am missing something obvious, but I can't figure it out. What I have come up with is the below code, appreciate any help. ...
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PermGen elimination in JDK 8

I have installed JDK 8 and trying to run Eclipse. I am getting following warning message: 6 Answers ...
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Remove multiple attributes with jQuery's removeAttr

I have the following code. 2 Answers 2 ...
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SQL - many-to-many table primary key

This question comes up after reading a comment in this question: 5 Answers 5 ...
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Is it intended by the C++ standards committee that in C++11 unordered_map destroys what it inserts?

I've just lost three days of my life tracking down a very strange bug where unordered_map::insert() destroys the variable you insert. This highly non-obvious behaviour occurs in very recent compilers only: I found that clang 3.2-3.4 and GCC 4.8 are the only compilers to demonstrate this "feature"....
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“Uncaught TypeError: Illegal invocation” in Chrome

When I use requestAnimationFrame to do some native supported animation with below code: 3 Answers ...
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What are file descriptors, explained in simple terms?

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HTTP Basic Authentication credentials passed in URL and encryption

I have a question about HTTPS and HTTP Authentication credentials. 3 Answers 3 ...
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How does IPython's magic %paste work?

I want to copy already indented Python code / whole functions and classes into IPython. Everytime I try the indentation is screwed up and I get following error message: ...
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How to handle Handler messages when activity/fragment is paused

Slight variation on my other posting 4 Answers 4 ...