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How can I determine whether a Java class is abstract by reflection
I am interating through classes in a Jar file and wish to find those which are not abstract. I can solve this by instantiating the classes and trapping InstantiationException but that has a performance hit as some classes have heavy startup. I can't find anything obviously like isAbstract() in the C...
How can I rename a field for all documents in MongoDB?
Assuming I have a collection in MongoDB with 5000 records, each containing something similar to:
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Devise - How do I forbid certain users from signing in?
I am using Devise for authentication in my application.
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Calculate distance between 2 GPS coordinates
How do I calculate distance between two GPS coordinates (using latitude and longitude)?
29 Answers
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Git search for string in a single file's history
So if I have a file called foo.rb and it is giving me an error for a missing method called bar , so I want to search the history of foo.rb for the string bar to see if it was ever defined in the past.
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python's re: return True if string contains regex pattern
I have a regular expression like this:
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Regex for string contains?
What is the regex for simply checking if a string contains a certain word (e.g. 'Test')? I've done some googling but can't get a straight example of such a regex. This is for a build script but has no bearing to any particular programming language.
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Split comma-separated strings in a column into separate rows
I have a data frame, like so:
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How can I get the max (or min) value in a vector?
How can I get the max (or min) value in a vector in C++ ?
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