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Git fatal: Reference has invalid format: 'refs/heads/master

I am using Dropbox to sync a git repository, but now when I try and push I am getting an error: 8 Answers ...
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What is the difference between the 'COPY' and 'ADD' commands in a Dockerfile?

What is the difference between the COPY and ADD commands in a Dockerfile, and when would I use one over the other? 13 A...
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Stateless vs Stateful - I could use some concrete information

...nterested in articles which have some concrete information about stateless and stateful design in programming. I'm interested because I want to learn more about it, but I really can't find any good articles about it. I've read dozens of articles on the web which vaguely discuss the subject, or they'...
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insert multiple rows via a php array into mysql

I'm passing a large dataset into a MySQL table via PHP using insert commands and I'm wondering if its possible to insert approximately 1000 rows at a time via a query other than appending each value on the end of a mile long string and then executing it. I am using the CodeIgniter framework so its f...
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Best practices for catching and re-throwing .NET exceptions

What are the best practices to consider when catching exceptions and re-throwing them? I want to make sure that the Exception object's InnerException and stack trace are preserved. Is there a difference between the following code blocks in the way they handle this? ...
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Typescript: difference between String and string

Does anyone know the difference between String and string in TypeScript? Am I correct in assuming that they ought to be the same? ...
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How do I enable EF migrations for multiple contexts to separate databases?

...ecause the Configuration.cs file already exists. If you rename that class and file, you should be able to run that 2nd Enable-Migrations, which will create another Configuration.cs. You will then need to specify which configuration you want to use when updating the databases. Update-Database -Con...
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How to fix 'android.os.NetworkOnMainThreadException'?

I got an error while running my Android project for RssReader. 59 Answers 59 ...
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how to implement a pop up dialog box in iOS

... say display a custom UI in your UIAlertView, you can subclass UIAlertView and put in custom UI components in the init method. If you want to respond to a button press after a UIAlertView appears, you can set the delegate above and implement the - (void)alertView:(UIAlertView *)alertView clickedButt...
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Column order manipulation using col-lg-push and col-lg-pull in Twitter Bootstrap 3

I'm now reading documentation on Twitter Bootstrap 3, and tried to follow column ordering as shown in this page but hit the wall. I don't understand why such a code works nor how to correctly specify the setting. What I want to show is one grid, which is consisted of length 5, and the other leng...