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Why is vertical-align: middle not working on my span or div?

I'm trying to vertically center a span or div element within another div element. However when I put vertical-align: middle , nothing happens. I've tried changing the display properties of both elements, and nothing seems to work. ...
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Why doesn't std::queue::pop return value.?

... T pop() { auto x = elements[top_position]; // TODO: call destructor for elements[top_position] here --top_position; // alter queue state here return x; // calls T(const T&) which may throw } If the copy constructor of T throws on return, you ha...
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Can one do a for each loop in java in reverse order?

... The Collections.reverse method actually returns a new list with the elements of the original list copied into it in reverse order, so this has O(n) performance with regards to the size of the original list. As a more efficient solution, you could write a deco...
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Turn off Visual Studio Attach security warning when debugging IIS

...p regedit, save this gist as a *.reg file and run it (imports the keys for all VS versions lower than VS2017). Visual Studio 2017 The configuration is saved in a private registry location, see this answer: https://stackoverflow.com/a/41122603/67910 For VS 2017, save this gist as a *.ps1 file an...
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jQuery: How can i create a simple overlay?

How can I create a really basic overlay in jQuery without UI? 7 Answers 7 ...
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List files committed for a revision

...es for that particular revision, adding username instead of revision lists all files and revisions for the user svn log --verbose --username 'username' – Satish Jun 9 '11 at 16:58 ...
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How to split a file into equal parts, without breaking individual lines? [duplicate]

...s wondering if it was possible to split a file into equal parts ( edit: = all equal except for the last), without breaking the line? Using the split command in Unix, lines may be broken in half. Is there a way to, say, split up a file in 5 equal parts, but have it still only consist of whole lines ...
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What was the strangest coding standard rule that you were forced to follow? [closed]

... What is the supposed point of this rule? Personally I'd fail a code review for code that could be made easier to read by putting in another return. – Mark Baker Oct 20 '08 at 15:31 ...
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Calculating a directory's size using Python?

... This walks all sub-directories; summing file sizes: import os def get_size(start_path = '.'): total_size = 0 for dirpath, dirnames, filenames in os.walk(start_path): for f in filenames: fp = os.path.join(di...
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Order Bars in ggplot2 bar graph

...rder. If left unspecified, the levels of a factor will be sorted alphabetically. You can also specify the level order within the call to factor as above, and other ways are possible as well. theTable$Position <- factor(theTable$Position, levels = c(...)) ...