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How to dynamically create CSS class in JavaScript and apply?

I need to create a CSS stylesheet class dynamically in JavaScript and assign it to some HTML elements like - div, table, span, tr, etc and to some controls like asp:Textbox, Dropdownlist and datalist. ...
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Is it better to use Enumerable.Empty() as opposed to new List() to initialize an IEnumerable

...Even if you use empty array or empty list, those are objects and they are stored in memory. Than Garbage Collector has to take care of them. If you are dealing with high throughput application, it could be noticeable impact. Enumerable.Empty does not create an object per call thus putting less load...
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Set a default parameter value for a JavaScript function

I would like a JavaScript function to have optional arguments which I set a default on, which get used if the value isn't defined (and ignored if the value is passed). In Ruby you can do it like this: ...
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What's the Point of Multiple Redis Databases?

So, I've come to a place where I wanted to segment the data I store in redis into separate databases as I sometimes need to make use of the keys command on one specific kind of data, and wanted to separate it to make that faster. ...
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SecurityException: Permission denied (missing INTERNET permission?)

this error is really really really strange and I don't know how to reproduce it and how to fix it because I made a lot of searches but nothing was useful. ...
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What is sr-only in Bootstrap 3?

... According to bootstrap's documentation, the class is used to hide information intended only for screen readers from the layout of the rendered page. Screen readers will have trouble with your forms if you don't include a label for ...
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Write applications in C or C++ for Android? [closed]

I'm trying to develop/port a game to Android, but it's in C, and Android supports Java, but I'm sure there must be a way to get a C app on there, anyone knows of a way to accomplish this? ...
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How can I view the shared preferences file using Android Studio?

I'm using shared preferences to store certain values for my app. I would like to see the file where the info is actually stored on my phone. I found many ways to do this on Eclipse, but I'm debugging on Android Studio. My phone is rooted. I read that having root access is important to read these typ...
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PHP multidimensional array search by value

I have an array where I want to search the uid and get the key of the array. 23 Answers ...
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Constructor in an Interface?

I know it's not possible to define a constructor in an interface. But I'm wondering why, because I think it could be very useful. ...