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Add column with number of days between dates in DataFrame pandas
...days did not work and I had to use df['C'] = (df['B'] - df['A']).days. Any idea why mine did not give the number of days as expected?
– Samuel Nde
Sep 21 '18 at 18:44
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What are the most-used vim commands/keypresses?
...ed. Maybe it can be useful to you.
Grosso modo, I don't think it's a good idea to do a radical switch. Vim is very different and it's best to go progressively.
And to answer your subquestion, yes, I use all of iaIAoO everyday to enter insert mode. It certainly seems weird at first but you don't re...
What is ApplicationException for in .NET?
...ion is a class that should not be part of the .NET Framework. The original idea was that classes derived from SystemException would indicate exceptions thrown from the CLR (or system) itself, whereas non-CLR exceptions would be derived from ApplicationException. However, a lot of exception classes d...
Storing money in a decimal column - what precision and scale?
...level you do need and stick to it. Don't use float. Seriously. It's a bad idea.
– Marcus Downing
Oct 22 '08 at 22:46
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How to convert java.util.Date to java.sql.Date?
...which represents a moment on the timeline in UTC. An Instant is similar in idea to a java.util.Date. But note that Instant has a resolution up to nanoseconds while java.util.Date has only milliseconds resolution.
To convert, use new methods added to the old classes. For example, java.util.Date.from(...
Get/pick an image from Android's built-in Gallery app programmatically
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It doesn't work when I use Astro file manager. Any ideas why?
– Rohith Nandakumar
Dec 15 '10 at 4:19
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What is the meaning of the CascadeType.ALL for a @ManyToOne JPA association
...ERGE, DETACH) to the relating entities.
It seems in your case to be a bad idea, as removing an Address would lead to removing the related User. As a user can have multiple addresses, the other addresses would become orphans. However the inverse case (annotating the User) would make sense - if an ad...
Is there any way to kill a Thread?
...ents is something not-pickable (like a logging.log) it might not be a good idea to use multiprocessing.
– Lyager
Apr 9 '18 at 9:10
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Going from a framework to no-framework [closed]
...an just be acquired when needed
I am a minimalist and I struggle with the idea of having code in my application that is not doing anything ... just in case I need it does not work for me.
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When is JavaScript's eval() not evil?
...ng you read. You see lots of people saying eval() is evil and they have no idea why except that they read it somewhere.
– Razor
Mar 4 '10 at 5:38
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