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What would cause an algorithm to have O(log log n) complexity?

This earlier question addresses some of the factors that might cause an algorithm to have O(log n) complexity. 2 Answers ...
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What’s the difference between ScalaTest and Scala Specs unit test frameworks?

Both are BDD (Behavior Driven Development) capable unit test frameworks for Scala written in Scala. And Specs is built upon may also involve the ScalaTest framework. But what does Specs offer ScalaTest doesn't? What are the differences? ...
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How should one use std::optional?

I'm reading the documentation of std::experimental::optional and I have a good idea about what it does, but I don't understand when I should use it or how I should use it. The site doesn't contain any examples as of yet which leaves it harder for me to grasp the true concept of this object. When...
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OAuth 2.0: Benefits and use cases — why?

Could anyone explain what's good about OAuth2 and why we should implement it? I ask because I'm a bit confused about it — here's my current thoughts: ...
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How can I profile Python code line-by-line?

I've been using cProfile to profile my code, and it's been working great. I also use gprof2dot.py to visualize the results (makes it a little clearer). ...
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What encoding/code page is cmd.exe using?

When I open cmd.exe in Windows, what encoding is it using? 6 Answers 6 ...
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Django dynamic model fields

I'm working on a multi-tenanted application in which some users can define their own data fields (via the admin) to collect additional data in forms and report on the data. The latter bit makes JSONField not a great option, so instead I have the following solution: ...
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Generic method multiple (OR) type constraint

Reading this , I learned it was possible to allow a method to accept parameters of multiple types by making it a generic method. In the example, the following code is used with a type constraint to ensure "U" is an IEnumerable<T> . ...
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Preserving signatures of decorated functions

Suppose I have written a decorator that does something very generic. For example, it might convert all arguments to a specific type, perform logging, implement memoization, etc. ...
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Fragment onCreateView and onActivityCreated called twice

I'm developing an app using Android 4.0 ICS and fragments. 5 Answers 5 ...