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What to add for the update portion in ConcurrentDictionary AddOrUpdate

I am trying to re-write some code using Dictionary to use ConcurrentDictionary. I have reviewed some examples but I am still having trouble implementing the AddOrUpdate function. This is the original code: ...
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What is the difference between setUp() and setUpClass() in Python unittest?

What is the difference between setUp() and setUpClass() in the Python unittest framework? Why would setup be handled in one method over the other? ...
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PHP: How to handle

I noticed that when using SimpleXMLElement on a document that contains those CDATA tags, the content is always NULL . How do I fix this? ...
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Why use 'git rm' to remove a file instead of 'rm'?

On SVN, removing something from the filesystem directly (rather than using svn) created a load of headaches. 7 Answers ...
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innerText vs innerHTML vs label vs text vs textContent vs outerText

I have a dropdown list which is populated by Javascript. 6 Answers 6 ...
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Best way to store date/time in mongodb

I've seen using strings, integer timestamps and mongo datetime objects. 2 Answers 2 ...
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Bower and devDependencies vs dependencies

... and realized afterwards that it installs 1.0.8, I uninstalled the angular components, however the original bower.json file had angular-mocks and angular-scenario under 'devDependencies' when I re-add all the 1.2.0-rc.2 components angular-mocks and angular-scenario under dependencies instead of devD...
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How do you use the Immediate Window in Visual Studio?

The Immediate Window is an immensely useful tool for debugging applications. It can be used to execute code statements that are valid in the context of a break point and inspect values. I also use it to type code snippets to learn language features. ...
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How do I write unencoded Json to my View using Razor?

I'm trying to write an object as JSON to my Asp.Net MVC View using Razor, like so: 3 Answers ...
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Rails where condition using NOT NIL

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