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Find integer index of rows with NaN in pandas dataframe
...
And just in case, if you want to find the coordinates of 'nan' for all the columns instead (supposing they are all numericals), here you go:
df = pd.DataFrame([[0,1,3,4,np.nan,2],[3,5,6,np.nan,3,3]])
df
0 1 2 3 4 5
0 0 1 3 4.0 NaN 2
1 3 5 6 NaN 3.0 3
np.where(np.as...
How to establish a connection pool in JDBC?
... Object, reducing the Garbage collection load.
« Pooling [ Object pool, String Constant Pool, Thread Pool, Connection pool]
String Constant pool
String literal pool maintains only one copy of each distinct string value. which must be immutable.
When the intern method is invoked, it check objec...
How to search for occurrences of more than one space between words in a line
... \w[ ]{2,}\w will fail to match word.<2 spaces>more words or a string that consists entirely of spaces. [^\s]([ ]{2,})[^\s]\w will fail on lines that start with spaces or strings like bla<2 spaces>....
– Tim Pietzcker
Sep 21 '10 at 9:48
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C# switch statement limitations - why?
...t believe the compiler generates constant-time branching when switching on strings either.
– Drew Noakes
Dec 3 '10 at 21:29
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iOS - forward all touches through a view
...r of other views underneath, which are scrollviews, etc. How can I forward all the touches through this overlay view? It is a subcalss of UIView.
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Android Webview - Completely Clear the Cache
... }
}
catch(Exception e) {
Log.e(TAG, String.format("Failed to clean the cache, error %s", e.getMessage()));
}
}
return deletedFiles;
}
/*
* Delete the files older than numDays days from the application cache
* 0 means all files.
*/
public sta...
Stop Excel from automatically converting certain text values to dates
...luate the expression following it. In this case the expression is simply a string literal and the value of a string literal is the content of the string. Thus the quotation marks magically disappear. You can put =1+2+3 and get the value 6 after CSV import. The formula itself is not destroyed in the ...
Error: Could not find or load main class in intelliJ IDE
...ginner in Java and am trying to run my code using IntelliJ that I just installed as my IDE with JDK 1.7. The following piece of code keeps does not even compile and keeps giving me the error:
...
How do I encode/decode HTML entities in Ruby?
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To encode the characters, you can use CGI.escapeHTML:
string = CGI.escapeHTML('test "escaping" <characters>')
To decode them, there is CGI.unescapeHTML:
CGI.unescapeHTML("test &quot;unescaping&quot; &lt;characters&gt;")
Of course, before that you need ...
How to check if Location Services are enabled?
... // notify user
new AlertDialog.Builder(context)
.setMessage(R.string.gps_network_not_enabled)
.setPositiveButton(R.string.open_location_settings, new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface paramDialogInterface, i...