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How to express a One-To-Many relationship in Django
I'm defining my Django models right now and I realized that there wasn't a OneToManyField in the model field types. I'm sure there's a way to do this, so I'm not sure what I'm missing. I essentially have something like this:
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How can I return to a parent activity correctly?
I have 2 activities (A and B) in my android application and I use an intent to get from activity A to activity B. The use of parent_activity is enabled:
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Differences between Java 8 Date Time API (java.time) and Joda-Time
...xtension points like resolve()). Most important difference is however - in my opinion:
JSR-310 can much better parse timezone names (format pattern symbol z) while Joda-Time could not do this at all in its earlier versions and now only in a very limited way.
Another advantage of JSR-310 is suppor...
Python List vs. Array - when to use?
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@Moe, as I pointed out in my answer above, Python's built-in array is not meant for doing math. If you try NumPy's ndarray for summing an array of 10^8 numbers, it will completely blow list away. @tzot has the right idea about why the built-in array i...
Meaning of “[: too many arguments” error from if [] (square brackets)
...e was a IF for a variable that had special characters. Double quotes saved my life. Thank you :)!
– ivanleoncz
May 8 '17 at 22:41
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Standardize data columns in R
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Yes my mistake I meant 0 mean. And that is quite a classy cat
– Hoser
Mar 5 '13 at 3:51
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Are static methods inherited in Java?
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@LucasC.Feijo actually I it does work. At least in my IDE (eclipse). I just get a warning. It might not be good style though... but that's a different story.
– dingalapadum
Apr 25 '17 at 0:00
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Writing to an Excel spreadsheet
I am new to Python. I need to write some data from my program to a spreadsheet. I've searched online and there seem to be many packages available (xlwt, XlsXcessive, openpyxl). Others suggest to write to a .csv file (never used CSV and don't really understand what it is).
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Better techniques for trimming leading zeros in SQL Server?
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Encapsulating this in a function resulted in slowing down my queries. I'm not quite sure why but I think it has to do with type conversion. Using the SUBSTRING inline was much faster.
– Ronnie Overby
Jul 26 '13 at 16:22
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How do you pass custom environment variable on Amazon Elastic Beanstalk (AWS EBS)?
... -> Edit Configuration -> Container) and update the values there. In my experience these values do not change after subsequent deployments.
Update 2
As @Benjamin stated in his comment, since the new look and feel was rolled out July 18, 2013 it is possible to define any number of environmen...