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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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How to check if an email address exists without sending an email?

I have come across this PHP code to check email address using SMTP without sending an email . 14 Answers ...
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No secret option provided to Rack::Session::Cookie warning?

I am running Rails 3.2.3, Ruby 1.9 under Fedora 17. I get this warning, when I run rails s , and how do I fix? 7 Answers ...
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Why do we not have a virtual constructor in C++?

Why does C++ not have a virtual constructor? 22 Answers 22 ...
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Setup a Git server with msysgit on Windows [closed]

My friends and I are trying to setup Git for Windows using the tutorial Git Server: Gitosis and Cygwin on Windows , but we just keep running into problems. ...
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What is the difference between isinstance('aaa', basestring) and isinstance('aaa', str)?

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TFS: Updating branch with changes from main

So, we have our main dev line, I create a branch, and developer b creates a branch. We both do some work. developer b finishes his work, merges back into the main dev line. I know his changes will affect me, and rather than deal with the conflicts later, I would like to update my branch, with the...
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Can you nest html forms?

Is it possible to nest html forms like this 20 Answers 20 ...
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Why is MySQL's default collation latin1_swedish_ci?

What is the reasoning behind setting latin1_swedish_ci as the compiled default when other options seem much more reasonable, like latin1_general_ci or utf8_general_ci ? ...
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Can you force Visual Studio to always run as an Administrator in Windows 8?

In Windows 7, you could go into a programs compatibility settings and check off to always run as an Administrator. Is there a similar option in Windows 8? ...