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Appending a line to a file only if it does not already exist
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Beautiful solution. This also works for triggering more complicated expressions, of course. Mine uses the echo to trigger a cat of a multiline heredoc into a config file.
– Eric L.
Jun 15 '15...
Logic to test that 3 of 4 are True
I want to return True if and only if 3 out of 4 boolean values are true.
27 Answers
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How do I detect what .NET Framework versions and service packs are installed?
A similar question was asked here , but it was specific to .NET 3.5. Specifically, I'm looking for the following:
13 Answe...
vector vs. list in STL
...d of a sequence repeatedly.
Check out the complexity guarantees for each different type of container:
What are the complexity guarantees of the standard containers?
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Best practice to call ConfigureAwait for all server-side code
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Update: ASP.NET Core does not have a SynchronizationContext. If you are on ASP.NET Core, it does not matter whether you use ConfigureAwait(false) or not.
For ASP.NET "Full" or "Classic" or whatever, the rest of this answer still applies.
Original post (for non-Core ASP.NET):
This vi...
How to delete a file after checking whether it exists
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This is pretty straightforward using the File class.
if(File.Exists(@"C:\test.txt"))
{
File.Delete(@"C:\test.txt");
}
As Chris pointed out in the comments, you don't actually need to do the File.Exists check since File.Delete doesn't throw an exception if the file doesn'...
How do I use Assert to verify that an exception has been thrown?
...recommend using it since it is not flexible enough. Consider what happens if the exception type is thrown by your test setup code: test passes, but didn't actually do what you expected. Or what if you want to test the state of the exception object. I usually want to use StringAssert.Contains(e.Mes...
Possible reason for NGINX 499 error codes
...ence is usually caused by client side timeout. As I know it's an Nginx specific error code.
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400 BAD request HTTP error code meaning?
... to indicate that the JSON is invalid in some way according to the API specification for the service.
By that logic, both the scenarios you provided should be 400's.
Imagine instead this were XML rather than JSON. In both cases, the XML would never pass schema validation--either because of an unde...
What is the difference between String.slice and String.substring?
Does anyone know what the difference is between these two methods?
8 Answers
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