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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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Multiple aggregations of the same column using pandas GroupBy.agg()

... functions f1, f2 to the same column df["returns"] , without having to call agg() multiple times? 3 Answers ...
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How to update a menu item shown in the ActionBar?

...e-writing the desire text worked without problems: if (mnuTopMenuActionBar_ != null) { MenuItem mnuPageIndex = mnuTopMenuActionBar_ .findItem(R.id.menu_magazin_pageOfPage_text); if (mnuPageIndex != null) { if (getScreenOrientation() == 1) { mnuPageIndex.setTitle...
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How to get RGB values from UIColor?

...rView.backgroundColor;//line 2 CGColorRef colorRef = [color CGColor]; int _countComponents = CGColorGetNumberOfComponents(colorRef); if (_countComponents == 4) { const CGFloat *_components = CGColorGetComponents(colorRef); CGFloat red = _components[0]; CGFloat green = _components[1...
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Min/Max-value validators in asp.net mvc

...MaxValueAttribute : ValidationAttribute { private readonly int _maxValue; public MaxValueAttribute(int maxValue) { _maxValue = maxValue; } public override bool IsValid(object value) { return (int) value <= _maxValue; ...
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Zip lists in Python

...x. list, string, tuple, dictionary) Output (list) 1st tuple = (element_1 of numbers, element_1 of letters) 2nd tuple = (e_2 numbers, e_2 letters) … n-th tuple = (e_n numbers, e_n letters) List of n tuples: n is the length of the shortest argument (input) len(numbers) =...
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.NET: Which Exception to Throw When a Required Configuration Setting is Missing?

...ubclass to ConfigurationErrorsException from Exception. I think it's generally a good idea to subclass custom exceptions from existing Framework exceptions where possible, avoiding the Exception class unless you need an application-specific exception. ...
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Java 8 forEach with index [duplicate]

... way to build a forEach method in Java 8 that iterates with an index? Ideally I'd like something like this: 3 Answers ...
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Focusable EditText inside ListView

...dded as a header view) that contains an EditText widget and a Button . All I want to do is be able to use the jogball/arrows, to navigate the selector to individual items like normal, but when I get to a particular row -- even if I have to explicitly identify the row -- that has a focusable chil...
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Recursive lambda functions in C++11

... in MSVC, where I have experience with them), it's just that they aren't really compatible with type inference. share | improve this answer | follow | ...