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Why doesn't the height of a container element increase if it contains floated elements?

I would like to ask how height and float work. I have an outer div and an inner div that has content in it. Its height may vary depending on the content of the inner div but it seems that my inner div will overflow its outside div. What would be the proper way to do it? ...
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Java Generics Wildcarding With Multiple Classes

I want to have a Class object, but I want to force whatever class it represents to extend class A and implement interface B. ...
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boost Composite keys - C/C++ - 清泛网 - 专注C/C++及内核技术

...te keysComposite keysIn relational databases, composite keys depend on two or more fields of a given table The analogous concept in Boost MultiIndex is Composite keys In relational databases, composite keys depend on two or more fields of a given table. The analogous concept in Boost.MultiIndex ...
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What does $$ (dollar dollar or double dollar) mean in PHP?

... A syntax such as $$variable is called Variable Variable. For example, if you consider this portion of code : $real_variable = 'test'; $name = 'real_variable'; echo $$name; You will get the following output : test Here : $real_variable contains test $name contains the name o...
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How do I log errors and warnings into a file?

How do I turn on all error and warnings and log them to a file, but to set up all of that within the script (not changing anything in php.ini)? ...
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Is there an upside down caret character?

...arge number of classic ASP pages, many of which have tabular data with no sort capabilities at all. Whatever order the original developer used in the database query is what you're stuck with. ...
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Batch script to delete files

... I can't speak for the OP, but on my system there's no problem finding a path with %, and escaping with %% keeps the system from finding it. – RonaldBarzell Dec 7 '12 at 13:36 ...
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Adding div element to body or document in JavaScript

I am creating a light box in pure JavaScript. For that I am making an overlay. I want to add this overlay to body but I also want to keep the content on the page. My current code adds the overlay div but it also removes the current contents in body. How to add div element and keep contents on body?...
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Which is best way to define constants in android, either static class, interface or xml resource?

...ng an android application which uses web service to get data from server, for that I'm having three different set of URLs to point development system, test server and live server. It's difficult to change URL whenever I want to give application for testing/live. so I planned to make it as configurab...
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When should an IllegalArgumentException be thrown?

I'm worried that this is a runtime exception so it should probably be used sparingly. Standard use case: 6 Answers ...