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What does the “map” method do in Ruby?

I'm new to programming. Can someone explain what .map would do in: 7 Answers 7 ...
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How to remove only underline from a:before?

I have a set of styled links using the :before to apply an arrow. 6 Answers 6 ...
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What is a sealed trait?

Sealed classes are described in 'Programming in Scala', but sealed traits are not. Where can I find more information about a sealed trait? ...
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Check if an element's content is overflowing?

...ant to show only an identifier for more content, then you can do this with pure CSS. I use pure scrolling shadows for this. The trick is the use of background-attachment: local;. Your css looks like this: .scrollbox { overflow: auto; width: 200px; max-height: 200px; margin: 50px aut...
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Inline labels in Matplotlib

In Matplotlib, it's not too tough to make a legend ( example_legend() , below), but I think it's better style to put labels right on the curves being plotted (as in example_inline() , below). This can be very fiddly, because I have to specify coordinates by hand, and, if I re-format the plot, I pro...
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SQL select join: is it possible to prefix all columns as 'prefix.*'?

I'm wondering if this is possible in SQL. Say you have two tables A and B, and you do a select on table A and join on table B: ...
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How do I avoid the specification of the username and password at every git push?

I git push my work to a remote Git repository. 18 Answers 18 ...
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Move entire line up and down in Vim

In Notepad++, I can use Ctrl + Shift + Up / Down to move the current line up and down. Is there a similar command to this in Vim? I have looked through endless guides, but have found nothing. ...
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How to recover stashed uncommitted changes

I had some uncommitted changes in my development branch and I stashed them using git stash , but there were some changes which were very important among those stashed ones. Is there any way to get back those changes? ...
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Regular cast vs. static_cast vs. dynamic_cast [duplicate]

...'ve been writing C and C++ code for almost twenty years, but there's one aspect of these languages that I've never really understood. I've obviously used regular casts i.e. ...