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Get environment variable value in Dockerfile

I'm building a container for a ruby app. My app's configuration is contained within environment variables (loaded inside the app with dotenv ). ...
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Upload artifacts to Nexus, without Maven

I have a non-Java project that produces a versioned build artifact, and I want to upload this to a Nexus repository. Because the project isn't Java, it doesn't use Maven for builds. And I'd rather not introduce Maven/POM files just to get files into Nexus. ...
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List directory in Go

I've been trying to figure out how to simply list the files and folders in a single directory in Go. 5 Answers ...
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Why doesn't “System.out.println” work in Android?

I want to print something in console, so that I can debug it. But for some reason, nothing prints in my Android application. ...
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How to change the background color of the options menu?

I'm trying to change the default color for the options menu which is white: I want a black background for every item on the options menu. ...
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add a string prefix to each value in a string column using Pandas

I would like to append a string to the start of each value in a said column of a pandas dataframe (elegantly). I already figured out how to kind-of do this and I am currently using: ...
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PHP - Get bool to echo false when false

The following code doesn't print out anything: 14 Answers 14 ...
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passing argument to DialogFragment

I need to pass some variables to DialogFragment , so I can perform an action. Eclipse suggests that I should use 6 Answers...
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How to bind function arguments without binding this?

In Javascript, how can I bind arguments to a function without binding the this parameter? 15 Answers ...
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How to use arguments from previous command?

I know that Esc + . gives you the last argument of the last command. 11 Answers 11...