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Apply a function to every row of a matrix or a data frame
Suppose I have a n by 2 matrix and a function that takes a 2-vector as one of its arguments. I would like to apply the function to each row of the matrix and get a n-vector. How to do this in R?
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Null check in an enhanced for loop
What is the best way to guard against null in a for loop in Java?
11 Answers
11
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How do I use a custom deleter with a std::unique_ptr member?
I have a class with a unique_ptr member.
6 Answers
6
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Does C# have extension properties?
Does C# have extension properties?
6 Answers
6
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How to check if a map contains a key in Go?
I know I can iterate over a map m by,
10 Answers
10
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IllegalMonitorStateException on wait() call
I am using multi-threading in java for my program.
I have run thread successfully but when I am using Thread.wait() , it is throwing java.lang.IllegalMonitorStateException .
How can I make a thread wait until it will be notified?
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Move all files except one
How can I move all files except one? I am looking for something like:
14 Answers
14
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I lose my data when the container exits
Despite Docker's Interactive tutorial and faq I lose my data when the container exits.
11 Answers
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Rails auto-assigning id that already exists
I create a new record like so:
5 Answers
5
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How do I find the PublicKeyToken for a particular dll?
I need to recreate a provider in my web.config file that looks something like this:
10 Answers
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