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Replace None with NaN in pandas dataframe
... dtype fields in your df and then replace the None:
obj_columns = list(df.select_dtypes(include=['object']).columns.values)
df[obj_columns] = df[obj_columns].replace([None], np.nan)
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Slicing of a NumPy 2d array, or how do I extract an mxm submatrix from an nxn array (n>m)?
I want to slice a NumPy nxn array. I want to extract an arbitrary selection of m rows and columns of that array (i.e. without any pattern in the numbers of rows/columns), making it a new, mxm array. For this example let us say the array is 4x4 and I want to extract a 2x2 array from it.
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Android dex gives a BufferOverflowException when building
...pport Library and restarted Eclipse. You may have to play around with your selected API level.
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How to detect user inactivity in Android
User start my app and logs in.
Selects Session Timeout to be 5 mins.
Does some operations on the app. (all in foreground)
Now User bring Myapp to background and starts some other app.
----> Count down timer starts and logs out user after 5 mins
OR user turns the screen OFF.
----> Cou...
How to use nodejs to open default browser and navigate to a specific URL
...try spawn("explorer.exe",['stackoverflow.com']), the windows explorer will select the default browser to open the URL.
– Qing Xu
Dec 14 '11 at 13:56
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“Git fatal: ref HEAD is not a symbolic ref” while using maven release plugin
...nkins - Jenkins Wiki), leaving the field empty can work for this, too: "If selected, and its value is an empty string or **, then the branch name is computed from the remote branch without the origin."
– evgeny9
Aug 14 '19 at 12:39
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Host 'xxx.xx.xxx.xxx' is not allowed to connect to this MySQL server
... add new privilege from phpmyadmin
Goto Privileges > Add a new User
Select Any Host for the desired username
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Git Remote: Error: fatal: protocol error: bad line length character: Unab
...o 2.19.0
Solution:
Tools > Settings > Git Extensions > SSH
Select [OpenSSH] instead of [PuTTY]
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Removing the title text of an iOS UIBarButtonItem
...all needed here
}
Alternate method (IB only, no code)
On the storyboard select the navigation item for the first view controller (not the second). Just enter a space for the Back Button text.
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Turn off spell checking in Eclipse for good
...s/attachment.cgi?id=196866
Install into your Eclipse.
Then you can export selected preferences to an .epf file.
Also add a preference (!) in Preferences > General > Common Preferences which will share your settings across newly created workspaces.
I use this all the time and though it is not...