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Python syntax for “if a or b or c but not all of them”

I have a python script that can receive either zero or three command line arguments. (Either it runs on default behavior or needs all three values specified.) ...
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JavaScript get clipboard data on paste event (Cross browser)

How can a web application detect a paste event and retrieve the data to be pasted? 20 Answers ...
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Get Image size WITHOUT loading image into memory

I understand that you can get the image size using PIL in the following fashion 6 Answers ...
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In AngularJS, what's the difference between ng-pristine and ng-dirty?

What are the differences between ng-pristine and ng-dirty ? It seems you can have both to be true : 5 Answers ...
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App.Config Transformation for projects which are not Web Projects in Visual Studio?

...for any XML configuration file. You can right-click on your web.config and click "Add Config Transforms." When you do this, you'll get a web.debug.config and a web.release.config. You can make a web.whatever.config if you like, as long as the name lines up with a configuration profile. The...
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JavaScript by reference vs. by value [duplicate]

...omprehensive reading material on when JavaScript passes something by value and when by reference and when modifying a passed item affects the value outside a function and when not. I'm also interested in when assigning to another variable is by reference vs. by value and whether that follows any di...
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Download a single folder or directory from a GitHub repo

...s://github.com/lodash/lodash/trunk/test Download the folder. Go to the command line and grab the folder with SVN. svn checkout https://github.com/lodash/lodash/trunk/test You might not see any activity immediately because Github takes up to 30 seconds to convert larger repositories, so be patie...
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What are the First and Second Level caches in Hibernate?

Can anyone explain in simple words what First and Second Level caching in Hibernate are? 7 Answers ...
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counting number of directories in a specific directory

...he number of folders in a specific directory. I am using the following command, but it always provides an extra one. 15 An...
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The 'json' native gem requires installed build tools

...on my windows 7 machine. Now I tried to install the JSON gem using the command, "gem install json" and got the following error. ...