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how to show lines in common (reverse diff)?
...he output column of lines duplicated in file1 and file2.
Also note that it is important to sort the files before using comm, as mentioned in the man pages.
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How do I remove packages installed with Python's easy_install?
...stalling new packages extremely convenient. However, as far as I can tell, it doesn't implement the other common features of a dependency manager - listing and removing installed packages.
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How to index into a dictionary?
... or values by index anyway, you can use d.keys()[i] and d.values()[i] or d.items()[i]. (Note that these methods create a list of all keys, values or items in Python 2.x. So if you need them more then once, store the list in a variable to improve performance.)
If you do care about the order of the...
How to use icons and symbols from “Font Awesome” on Native Android Application
...pied fontawesome-webfont.ttf into my assests folder
Found the character entities for icons I wanted, using this page: http://fortawesome.github.io/Font-Awesome/cheatsheet/
Created an entry in strings.xml for each icon. Eg for a heart:
<string name="icon_heart">&#xf004;</string>
Re...
How to use SCNetworkReachability in Swift
...r was extended repeatedly due to changes in the Swift language, which made it a bit confusing. I have now rewritten it and removed everything which refers to Swift 1.x. The older code can
be found in the edit history if somebody needs it.)
This is how you would do it in Swift 2.0 (Xcode 7):
import...
How do I determine k when using k-means clustering?
...ing , and one thing that's not clear is how you choose the value of k. Is it just a matter of trial and error, or is there more to it?
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AngularJS. How to call controller function from outside of controller component
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Here is a way to call controller's function from outside of it:
angular.element(document.getElementById('yourControllerElementID')).scope().get();
where get() is a function from your controller.
You can switch
document.getElementById('yourControllerElementID')`
to
$('#you...
Knight's Shortest Path on Chessboard
I've been practicing for an upcoming programming competition and I have stumbled across a question that I am just completely bewildered at. However, I feel as though it's a concept I should learn now rather than cross my fingers that it never comes up.
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psql: FATAL: database “” does not exist
...'m using the PostgreSql app for mac ( http://postgresapp.com/ ). I've used it in the past on other machines but it's giving me some trouble when installing on my macbook. I've installed the application and I ran:
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An item with the same key has already been added
I get this error whenever I submit the form also the action method is not being called because of this:
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