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How to get the first column of a pandas DataFrame as a Series?
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>>> import pandas as pd
>>> df = pd.DataFrame({'x' : [1, 2, 3, 4], 'y' : [4, 5, 6, 7]})
>>> df
x y
0 1 4
1 2 5
2 3 6
3 4 7
>>> s = df.ix[:,0]
>>> type(s)
<class 'pandas.core.series.Serie...
Is there a Pattern Matching Utility like GREP in Windows?
Is there a similar utility to grep available from the Windows Command Prompt, or is there a third party tool for it?
32 A...
Simple Pivot Table to Count Unique Values
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Insert a 3rd column and in Cell C2 paste this formula
=IF(SUMPRODUCT(($A$2:$A2=A2)*($B$2:$B2=B2))>1,0,1)
and copy it down. Now create your pivot based on 1st and 3rd column. See snapshot
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Ignore python multiple return value
...= func()[0] to return the first value, x = func()[1] to return the second, and so on.
If you want to get multiple values at a time, use something like x, y = func()[2:4].
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Initializing IEnumerable In C#
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IEnumerable is just an interface and so can't be instantiated directly.
You need to create a concrete class (like a List)
IEnumerable<string> m_oEnum = new List<string>() { "1", "2", "3" };
you can then pass this to anything expecting an IEnu...
Reducing the space between sections of the UITableView
.... I did already try to return 0 for -tableView:heightForFooterInSection: and -tableView:heightForHeaderInSection: but that doesn't change anything.
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Window Features - 更多技术 - 清泛网 - 专注C/C++及内核技术
...overview discusses features of windows such as window types, states, size, and position.Window TypesOverlapped...This overview discusses features of windows such as window types, states, size, and position.
Window Types
Overlapped Windows
Pop-up Windows
Child Windows
Layered Windows
Mes...
iPhone/iOS JSON parsing tutorial [closed]
... application that calls a webserver/webservice, retrieves a JSON response, and uses that response to populate the rows of a UITableView (assuming it converts the JSON into an NSArray first).
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Set the value of an input field
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Yes, assign an event handler to the input field that wipes the value onclick. Example: elem.onclick = clearField(); // that would point to a function that wipes the field by setting the value to nothing, similar to the answer above.
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Genymotion, “Unable to load VirtualBox engine.” on Mavericks. VBox is setup correctly
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I had the same problem and solved it by running the following command:
sudo /Library/StartupItems/VirtualBox/VirtualBox restart
In later versions, the command is
sudo /Library/Application\ Support/VirtualBox/LaunchDaemons/VirtualBoxStartup.sh ...