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what is the most efficient way of counting occurrences in pandas?

...].astype('str').stack().value_counts().sum() which equates to setting each selected column to str type, stacking all individual columns on top, forming basically one column and then doing the value_counts() and sum() on that one column. :) Stack is pretty useful, it might not be the most obvious cho...
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How do I create a new branch?

...ow: Right click on Trunk/ which you will be creating your Branch from: Select Branch/Tag: Type in location of your new branch, commit message, and any externals (if your repository has them): share | ...
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Do I need to disable NSLog before release Application?

...s is through 'edit scheme' -> 'run app name' -> under the tab 'info' select using the drop-down box between debug & release. In the release version you won't see any NSLog output in the debug console ! How does this all work? first of all, one must know that a preprocessor is relatively ...
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How Do I Hide wpf datagrid row selector

I'm using the WPF DataGrid control to show some details and a select button, and I don't need the gray selector column down the left-hand side. It's also ruining the beauty of my design. ...
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Installing Java on OS X 10.9 (Mavericks)

... If you have installed both java6 and java7, you can select v6 in your shell with: export JAVA_HOME=/System/Library/Java/JavaVirtualMachines/1.6.0.jdk/Contents/Home – Jürgen Strobel Oct 28 '13 at 13:34 ...
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Relative paths in Python

...2).resolve() In the future, it just that simple. :D Moreover, we can select and check and copy/move those template files with pathlib: if src_path != cwd: # When we have different types of files in the `src_path` for template_path in src_path.glob('*.ini'): fname = template_pa...
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HTML/CSS: Make a div “invisible” to clicks?

... However, this means that the text can't be clicked (eg, to click links or select it). Would it be possible to simply make this div "invisible" to clicks and other mouse events? ...
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Check if a user has scrolled to the bottom

... how can i select particular div id instead of the whole window? – James Smith Mar 23 '15 at 3:28 ...
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How to use ? : if statements with Razor and inline code blocks

... should work: <span class="vote-up@(puzzle.UserVote == VoteType.Up ? "-selected" : "")">Vote Up</span> share | improve this answer | follow | ...
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How to make/get a multi size .ico file? [closed]

...ultiple icon ico file for free. Drag & drop the different icon sizes, select them all and choose file -> create multiple icon. You can download if from http://www.towofu.net/soft/e-aicon.php share | ...