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Picking a random element from a set

How do I pick a random element from a set? I'm particularly interested in picking a random element from a HashSet or a LinkedHashSet, in Java. Solutions for other languages are also welcome. ...
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Python try…except comma vs 'as' in except

What is the difference between ',' and 'as' in except statements, eg: 5 Answers 5 ...
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How to flatten tree via LINQ?

So I have simple tree: 14 Answers 14 ...
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Capture Stored Procedure print output in .NET

Is it possible to capture print output from a T-SQL stored procedure in .NET? 3 Answers ...
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Different types of thread-safe Sets in Java

There seems to be a lot of different implementations and ways to generate thread-safe Sets in Java. Some examples include 4...
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python numpy machine epsilon

I am trying to understand what is machine epsilon. According to the Wikipedia, it can be calculated as follows: 3 Answers ...
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Get Android .apk file VersionName or VersionCode WITHOUT installing apk

How can I get programmatically get the version code or version name of my apk from the AndroidManifest.xml file after downloading it and without installing it. ...
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Show an image preview before upload

In my HTML form I have input filed with type file for example : 5 Answers 5 ...
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Pan & Zoom Image

I want to create a simple image viewer in WPF that will enable the user to: 10 Answers ...
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Is it possible to assign numeric value to an enum in Java?

Is anything like this possible in Java? Can one assign custom numeric values to enum elements in Java? 5 Answers ...