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What does the “|” (single pipe) do in JavaScript?

Why does 0.5 | 0 return zero, but any integer (including negative) returns the input integer? What does the single pipe ("|") do? ...
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Python argparse mutual exclusive group

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NULL vs nil in Objective-C

In observeValueForKeyPath:ofObject:change:context: - why do the docs use NULL instead of nil when not specifying a context pointer? ...
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Why does scanf() need “%lf” for doubles, when printf() is okay with just “%f”?

Why is it that scanf() needs the l in " %lf " when reading a double , when printf() can use " %f " regardless of whether its argument is a double or a float ? ...
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Visual Studio - Resx File default 'internal' to 'public'

Every time I edit a resource file in VS, it regenerates the corresponding code and sets the class access modifier to internal. It's a pain to Ctrl-F -> ReplaceAll every time I edit the resx. Is there a property/setting so that I can default this to public? ...
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How do I turn on SQL debug logging for ActiveRecord in RSpec tests?

I have some RSpec tests for my models and I would like to turn on SQL ActiveRecord logging just like I see in the Rails server mode. How to do that? ...
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Url decode UTF-8 in Python

I have spent plenty of time as far as I am newbie in Python. How could I ever decode such a URL: 3 Answers ...
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Colored logcat in android studio by colorpid

according to this link github colored logcat I am looking for any solution how to use it in android studio/intellij. Is there in android studio any option to modify calling adb logcat ? Here is the example how it works. ...
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Open a file with Notepad in C#

How I open a file in c#? I don't mean reading it by textreader and readline(). I mean open it as an independent file in notepad. ...
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How to check if element exists using a lambda expression?

Specifically, I have TabPane, and I would like to know if there is element with specific ID in it. 3 Answers ...