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list every font a user's browser can display

...families) that the browser can show? (I want to give the user a dropdown with a list of all available fonts, and allow the user to choose a font.) I'd prefer not to have to hardcode this list ahead of time or send it down from the server. (Intuitively, it seems like the browser should know what fo...
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How to vertically center divs? [duplicate]

... modern browsers is to use flexbox: #Login { display: flex; align-items: center; } Some browsers will need vendor prefixes. For older browsers without flexbox support (e.g. IE 9 and lower), you'll need to implement a fallback solution using one of the older methods. Recommended Reading ...
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Clear form fields with jQuery

I want to clear all input and textarea fields in a form. It works like the following when using an input button with the reset class: ...
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Convert a Git folder to a submodule retrospectively?

Quite often it is the case that you're writing a project of some kind, and after a while it becomes clear that some component of the project is actually useful as a standalone component (a library, perhaps). If you've had that idea from early on, then there's a fair chance that most of that code is ...
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What is Python used for? [closed]

What is Python used for and what is it designed for? 2 Answers 2 ...
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How do I get the path of the current executed file in Python?

This may seem like a newbie question, but it is not. Some common approaches don't work in all cases: 13 Answers ...
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How can I convert a string to a number in Perl?

I have a string which holds a decimal value in it and I need to convert that string into a floating point variable. So an example of the string I have is "5.45" and I want a floating point equivalent so I can add .1 to it. I have searched around the internet, but I only see how to convert a string t...
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Vagrant's port forwarding not working [closed]

... of just more comments. First thing: try curl 'http://localhost:80' from within the VM. If that doesn't work, then it's definitely not the port forwarding. Next: try curl -v 'http://localhost:4567/' from your host machine. Curl might give you a better error message than Safari. I'd check that t...
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Immutability of Strings in Java

... str is not an object, it's a reference to an object. "Hello" and "Help!" are two distinct String objects. Thus, str points to a string. You can change what it points to, but not that which it points at. Take this code, for example: String s1 = "He...
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What is PECS (Producer Extends Consumer Super)?

...dr: "PECS" is from the collection's point of view. If you are only pulling items from a generic collection, it is a producer and you should use extends; if you are only stuffing items in, it is a consumer and you should use super. If you do both with the same collection, you shouldn't use either ext...