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java: ArrayList - how can i check if an index exists?

I'm using ArrayList<String> and I add data at specific indices, how can I check if a specific index exists? 11 Ans...
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LINQ: Not Any vs All Don't

Often I want to check if a provided value matches one in a list (e.g. when validating): 8 Answers ...
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In Bash, how do I add a string after each line in a file?

How do I add a string after each line in a file using bash? Can it be done using the sed command, if so how? 6 Answers ...
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How do I create multiple submit buttons for the same form in Rails?

I need to have multiple submit buttons. 7 Answers 7 ...
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Get color value programmatically when it's a reference (theme)

Consider this: 7 Answers 7 ...
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Threading in a PyQt application: Use Qt threads or Python threads?

I'm writing a GUI application that regularly retrieves data through a web connection. Since this retrieval takes a while, this causes the UI to be unresponsive during the retrieval process (it cannot be split into smaller parts). This is why I'd like to outsource the web connection to a separate wor...
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How can I make setInterval also work when a tab is inactive in Chrome?

I have a setInterval running a piece of code 30 times a second. This works great, however when I select another tab (so that the tab with my code becomes inactive), the setInterval is set to an idle state for some reason. ...
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AngularJS: How can I pass variables between controllers?

I have two Angular controllers: 16 Answers 16 ...
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Script not served by static file handler on IIS7.5

I've just tried to deploy my first web application to IIS on my Windows 7 Home Premium notebook. After creating the application, I had to change to the Classic App Pool, then set that pool for framework 4.0. Now I get the following error: ...
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Is it better to return null or empty collection?

That's kind of a general question (but I'm using C#), what's the best way (best practice), do you return null or empty collection for a method that has a collection as a return type ? ...