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How to detect when an Android app goes to the background and come back to the foreground
I am trying to write an app that does something specific when it is brought back to the foreground after some amount of time. Is there a way to detect when an app is sent to the background or brought to the foreground?
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How to express a One-To-Many relationship in Django
...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 to avoid using Select in Excel VBA
...standable abhorrence of using .Select in Excel VBA, but am unsure of how to avoid using it. I am finding that my code would be more re-usable if I were able to use variables instead of Select functions. However, I am not sure how to refer to things (like the ActiveCell etc.) if not using Sele...
Why is printing to stdout so slow? Can it be sped up?
I've always been amazed/frustrated with how long it takes to simply output to the terminal with a print statement. After some recent painfully slow logging I decided to look into it and was quite surprised to find that almost all the time spent is waiting for the terminal to process the results.
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What is the best way to auto-generate INSERT statements for a SQL Server table?
...e will need a bunch of dummy data. I've added that data by using MS Access to dump excel files into the relevant tables.
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How to avoid reverse engineering of an APK file?
I am developing a payment processing app for Android, and I want to prevent a hacker from accessing any resources, assets or source code from the APK file.
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Update Item to Revision vs Revert to Revision
I've started to use Subversion with TortoiseSVN. If I open up the log and right click on an old revision I see two options that sound like they roll back to an older version: "Update item to revision" and "Revert to this revision".
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Best practices: throwing exceptions from properties
When is it appropriate to throw an exception from within a property getter or setter? When is it not appropriate? Why? Links to external documents on the subject would be helpful... Google turned up surprisingly little.
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Difference Between One-to-Many, Many-to-One and Many-to-Many?
... I'm having trouble visualizing and understanding the differences and when to use each. I'm also a little unclear as to how concepts like uni-directional and bi-directional mappings affect the one-to-many/many-to-many relationships. I'm using Hibernate right now so any explanation that's ORM related...
How do pointer to pointers work in C?
How do pointers to pointers work in C?
When would you use them?
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