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xpath find if node exists

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Why was “Avoid Enums Where You Only Need Ints” removed from Android's performance tips?

The section "Avoid Enums Where You Only Need Ints" was removed from the official developer documentation . (See Why doesn't Android use more enums? for the old section content) ...
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Instance variables vs. class variables in Python

I have Python classes, of which I need only one instance at runtime, so it would be sufficient to have the attributes only once per class and not per instance. If there would be more than one instance (which won't happen), all instance should have the same configuration. I wonder which of the follow...
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How to get current path with query string using Capybara

The page url is something like /people?search=name while I used current_path method of capybara it returned /people only. ...
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How to change past commit to include a missed file?

I have committed a change and forgot to add a file to the change set. After other commits, I realized the file is now missing from a HEAD^4 commit. ...
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Change branch base

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What's the difference between design patterns and architectural patterns?

...n we read about design patterns on the internet we note that there are 3 categories: 5 Answers ...
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When serving JavaScript files, is it better to use the application/javascript or application/x-javas

The whole question fits in the title. And to add some context: I'm not asking what is the best according to what the specs are saying, but rather what works the best given the mix of browsers deployed nowadays. ...
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How do I write good/correct package __init__.py files

My package has the following structure: 3 Answers 3 ...
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Create a submodule repository from a folder and keep its git commit history

I have a web application that explores other web applications in a particular way. It contains some web demos in a demos folder and one of the demo should now have it's own repository. I would like to create a separate repository for this demo application and make it a subpackage submodule fro...