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Are Java static initializers thread safe?

I'm using a static code block to initialize some controllers in a registry I have. My question is therefore, can I guarantee that this static code block will only absolutely be called once when the class is first loaded? I understand I cannot guarantee when this code block will be called, I'm guessi...
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How to convert string to boolean php

How can I convert string to boolean ? 20 Answers 20 ...
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How to change fontFamily of TextView in Android

So I'd like to change the android:fontFamily in Android but I don't see any pre-defined fonts in Android. How do I select one of the pre-defined ones? I don't really need to define my own TypeFace but all I need is something different from what it shows right now. ...
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Compelling examples of custom C++ allocators?

What are some really good reasons to ditch std::allocator in favor of a custom solution? Have you run across any situations where it was absolutely necessary for correctness, performance, scalability, etc? Any really clever examples? ...
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CSS: How to position two elements on top of each other, without specifying a height?

I have two DIVs that I need to position exactly on top of each other. However, when I do that, the formatting gets all screwed up because the containing DIV acts like there is no height. I think this is the expected behavior with position:absolute but I need to find a way to position these two ele...
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Unable to Connect to GitHub.com For Cloning

I am trying to clone the angular-phonecat git repository , but I am getting the following message when I enter the command in my Git Bash: ...
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How do I get a list of all the duplicate items using pandas in python?

I have a list of items that likely has some export issues. I would like to get a list of the duplicate items so I can manually compare them. When I try to use pandas duplicated method , it only returns the first duplicate. Is there a a way to get all of the duplicates and not just the first one?...
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How does Spring Data JPA differ from Hibernate for large projects?

I am having a hard time deciding if I should stick with Hibernate for a new project, or get my feet wet with JPA and the new Spring Data implementation. ...
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How to Calculate Execution Time of a Code Snippet in C++

I have to compute execution time of a C++ code snippet in seconds. It must be working either on Windows or Unix machines. 1...
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How to check whether mod_rewrite is enable on server?

Currently I am using the hosting with lightspeed server. Hosting says mod_rewrite is enabled but I can't get my script working there. Whenever I try to access the URL, it returns 404 - not found page. ...