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pandas: filter rows of DataFrame with operator chaining
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Since version 0.18.1 the .loc method accepts a callable for selection. Together with lambda functions you can create very flexible chainable filters:
import numpy as np
import pandas as pd
df = pd.DataFrame(np.random.randint(0,100,size=(100, 4)), columns=list('ABCD'))
df.loc[lambda ...
Eclipse count lines of code
...e way to count lines of code in Eclipse:
using the Search / File... menu, select File Search tab, specify \n[\s]* for Containing text (this will not count empty lines), and tick Regular expression.
Hat tip: www.monblocnotes.com/node/2030
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Sqlite or MySql? How to decide? [closed]
...to want to run several queries at once, or run a workload that has lots of selects and a few updates, and want them to go smoothly etc.
a lot of memory usage, for example, to buffer parts of your 1Tb database in your 32G of memory.
You need to use mysql or some other server-based RDBMS.
Note that...
Should we @Override an interface's method implementation?
...o do that right click on ur project-> properties-> Java compiler and select one that is higher than 1.5.
– Rose
Nov 14 '12 at 19:18
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How to simulate a higher resolution screen? [closed]
...esolution throws this: "Your Screen Resolution is too small The pop-up you selected is too big for the screen resolution you use. Your screen resolution is 1440 pixels by 900 pixels. The pop-up window you tried to open is 1920 pixels by 1200. "
– HappyDeveloper
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Delete files older than 15 days using PowerShell
....LastwriteTime -lt (Get-Date).AddDays(-15) ) -and (! $_.PSIsContainer)} | select name| Remove-Item -Verbose -Force -Recurse -ErrorAction SilentlyContinue
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Android notification doesn't disappear after clicking the notifcation
...tTitle, contentText, pendingIntent);
// Cancel the notification after its selected
notification.flags |= Notification.FLAG_AUTO_CANCEL;
and to launch the app:
NotificationManager notificationManager = (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
Intent intent = ...
nullable object must have a value
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When using LINQ extension methods (e.g. Select, Where), the lambda function might be converted to SQL that might not behave identically to your C# code. For instance, C#'s short-circuit evaluated && and || are converted to SQL's eager AND and OR. This can c...
How to create Windows EventLog source from command line?
... does work, a quicker/easier way is to simply click on its Action menu and select Refresh.
– Rich Bayless
Aug 28 at 15:29
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'nuget' is not recognized but other nuget commands working
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Right-click on your project in solution explorer.
Select Manage NuGet Packages for Solution.
Search NuGet.CommandLine by Microsoft and Install it.
On complete installation, you will find a folder named packages in
your project. Go to solution explorer and look for it.
Insi...