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How to list all installed packages and their versions in Python?

Is there a way in Python to list all installed packages and their versions? 11 Answers ...
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Aligning UIToolBar items

I have three UIBarButtonItem created as below. They align left and I'd like to align center so there isn't a gap on the right side. I don't see an align property on UIToolBar . Is there another way to accomplish this? ...
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Prevent ViewPager from destroying off-screen views

I have a ViewPager hooked up to a FragmentPagerAdapter that's displaying three fragments. The ViewPager appears to destroy a hosted fragment's view when it is more than one swipe away from the current position. ...
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Creating an index on a table variable

Can you create an index on a table variable in SQL Server 2000? 3 Answers 3 ...
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Getting pids from ps -ef |grep keyword

I want to use ps -ef | grep "keyword" to determine the pid of a daemon process (there is a unique string in output of ps -ef in it). ...
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What is the difference between double-ampersand (&&) and semicolon (;) in Linux Bash?

What is the difference between ampersand and semicolon in Linux Bash ? 3 Answers 3 ...
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PHP foreach loop key value

I am running this DB call to get me multi-dimensional array I am trying to get the keys of each but when I try it comes up blank or as array. ...
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Node.js app can't run on port 80 even though there's no other process blocking the port

I'm running an instance of Debian on Amazon EC2 with Node.js installed. If I run the code below: 9 Answers ...
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Java: Literal percent sign in printf statement

I'm trying to add an actual percent sign into a printf statement in Java and I'm getting the error: 3 Answers ...
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HttpSecurity, WebSecurity and AuthenticationManagerBuilder

Could anyone explain when to override configure(HttpSecurity) , configure(WebSecurity) and configure(AuthenticationManagerBuilder) ? ...