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What is the purpose of the var keyword and when should I use it (or omit it)?

What exactly is the function of the var keyword in JavaScript, and what is the difference between 19 Answers ...
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Detect if an input has text in it using CSS — on a page I am visiting and do not control?

... input has text in it via CSS? I've tried using the :empty pseudo-class, and I've tried using [value=""] , neither of which worked. I can't seem to find a single solution to this. ...
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What's the difference between window.location= and window.location.replace()?

...n item to your history in that you can (or should be able to) click "Back" and go back to the current page. window.location.replace replaces the current history item so you can't go back to it. See window.location: assign(url): Load the document at the provided URL. replace(url):Replace...
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How does Python's super() work with multiple inheritance?

I'm pretty much new in Python object oriented programming and I have trouble understanding the super() function (new style classes) especially when it comes to multiple inheritance. ...
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public friend swap member function

In the beautiful answer to the copy-and-swap-idiom there is a piece of code I need a bit of help: 2 Answers ...
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Does JavaScript guarantee object property order?

... iteration order is a combination of the insertion order for strings keys, and ascending order for number-like keys: // key order: 1, foo, bar const obj = { "foo": "foo", "1": "1", "bar": "bar" } Using an array or a Map object can be a better way to achieve this. Map shares some similarities with O...
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Remove header and footer from window.print()

I am using window.print() for printing page, but I got header and footer contains page title, file path, page number and date. How to remove them? ...
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What are the differences between mocks and stubs on Rhino Mocks?

I haven't play enough with this and usually use mocks, but I wonder what are the differences between this two and when to use one or the other on Rhino Mocks. ...
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Playing .mp3 and .wav in Java?

How can I play an .mp3 and a .wav file in my Java application? I am using Swing. I tried looking on the internet, for something like this example: ...
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Git keeps prompting me for a password

... I think you may have the wrong Git repository URL. Open .git/config and find the [remote "origin"] section. Make sure you're using the SSH one: ssh://git@github.com/username/repo.git You can see the SSH URL in the main page of your repository if you click Clone or download and choose ssh. ...