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How to “grep” for a filename instead of the contents of a file?
grep is used to search within a file to see if any line matches a given regular expression. However, I have this situation - I want to write a regular expression that will match the filename itself (and not the contents of the file). I will run this from the system's root directory, to find all thos...
What is Data Transfer Object?
What is a Data Transfer Object?
8 Answers
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Drop data frame columns by name
I have a number of columns that I would like to remove from a data frame. I know that we can delete them individually using something like:
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What is the purpose of the var keyword and when should I use it (or omit it)?
What exactly is the function of the var keyword in JavaScript, and what is the difference between
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How to find if a given key exists in a C++ std::map
I'm trying to check if a given key is in a map and somewhat can't do it:
14 Answers
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Join a list of items with different types as string in Python
I need to join a list of items. Many of the items in the list are integer values returned from a function; i.e.,
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How to succinctly write a formula with many variables from a data frame?
Suppose I have a response variable and a data containing three covariates (as a toy example):
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Best way to select random rows PostgreSQL
I want a random selection of rows in PostgreSQL, I tried this:
12 Answers
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java.net.SocketException: Connection reset
I am getting the following error trying to read from a socket. I'm doing a readInt() on that InputStream , and I am getting this error. Perusing the documentation this suggests that the client part of the connection closed the connection. In this scenario, I am the server.
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Get the subdomain from a URL
Getting the subdomain from a URL sounds easy at first.
16 Answers
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