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how can I see what ports mongo is listening on from mongo shell?

If I have a mongo instance running, how can I check what port numbers it is listening on from the shell? I thought that db.serverStatus() would do it but I don't see it. I see this ...
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What is the “realm” in basic authentication

I'm setting up basic authentication on a php site and found this page on the php manual showing the set up. What does "realm" mean here in the header? ...
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How To Check If A Key in **kwargs Exists?

Python 3.2.3. There were some ideas listed here , which work on regular var's, but it seems **kwargs play by different rules... so why doesn't this work and how can I check to see if a key in **kwargs exists? ...
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Difference between \A \z and ^ $ in Ruby regular expressions

In the documentation I read: 4 Answers 4 ...
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What does && mean in void *p = &&abc;

I came across a piece of code void *p = &&abc; . What is the significance of && here? I know about rvalue references but I think && used in this context is different. What does && indicate in void *p = &&abc; ? ...
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How can I access a JavaScript object which has spaces in the object's key?

I have a JavaScript object that looks something like this: 5 Answers 5 ...
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Why Collections.sort uses merge sort instead of quicksort?

We know that quick sort is the fastest sorting algorithm. 1 Answer 1 ...
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Rails “validates_uniqueness_of” Case Sensitivity

Here is the model (I am using SQLLite3): 4 Answers 4 ...
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Difference between Document-based and Key/Value-based databases?

I know there are three different, popular types of non-sql databases. 2 Answers 2 ...
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What does Html.HiddenFor do?

Although I have read the documentation on Html.HiddenFor, I've not grasped what is it used for... 4 Answers ...