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vim command to restructure/force text to 80 columns

I know there are ways to automatically set the width of text in vim using set textwidth (like Vim 80 column layout concerns ). What I am looking for is something similar to = (the indent line command) but to wrap to 80. The use case is sometimes you edit text with textwidth and after joining li...
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What is the difference between setUp() and setUpClass() in Python unittest?

What is the difference between setUp() and setUpClass() in the Python unittest framework? Why would setup be handled in one method over the other? ...
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How to add an extra source directory for maven to compile and include in the build jar?

In addition to the src/main/java, I am adding a src/bootstrap directory that I want to include in my build process, in other words, I want maven to compile and include the sources there in my build. How!? ...
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How to vertically center a div for all browsers?

I want to center a div vertically with CSS. I don't want tables or JavaScript, but only pure CSS. I found some solutions, but all of them are missing Internet Explorer 6 support. ...
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Selecting and manipulating CSS pseudo-elements such as ::before and ::after using jQuery

Is there any way to select/manipulate CSS pseudo-elements such as ::before and ::after (and the old version with one semi-colon) using jQuery? ...
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@RequestBody and @ResponseBody annotations in Spring

Can someone explain the @RequestBody and @ResponseBody annotations in Spring 3? What are they for? Any examples would be great. ...
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What is the Oracle equivalent of SQL Server's IsNull() function?

In SQL Server we can type IsNull() to determine if a field is null. Is there an equivalent function in PL/SQL? 4 Answers...
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What is the difference between gmake and make?

I am trying to understand the difference between 'gmake' and 'make'? 4 Answers 4 ...
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Method overloading in Objective-C?

As far as my knowledge, Objective-C does not support method overloading. What can be the alternative for this in Objective-C? Or should I always use different method name? ...
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Can I combine :nth-child() or :nth-of-type() with an arbitrary selector?

Is there a way to select every nth child that matches (or does not match) an arbitrary selector ? For example, I want to select every odd table row, but within a subset of the rows: ...