bgoldst

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bgoldst has asked 11 questions and find answers to 167 problems.

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bgoldst questions

How to prevent backtracking from end-of-string
Is it possible to pass command-line arguments to @ARGV when using the -n or -p options?
Is it possible to store invalid UTF-8 byte sequences in a postgres text column?
When calling the exec*() family of functions, do the char* elements of argv all have to be unique?
Is it possible to conditionally disable a global function definition using template metaprogramming?
Is it possible to use the data.table index-join-assignment idiom to do a left join and assign NAs in the non-matching rows of i to x?
flock(): is it possible to merely check if the file is already locked, without actually acquiring the lock if not?
Can you assign a substring of a std::string to itself?

bgoldst answers

R: How to sum pairs in a Matrix by row?
gsub with exception in R
R: Create multiple columns in list of data.tables and modify them with condition on a grouping variable
Adding a new column in a matrix in R
How do I add a vector where I collapse scores from individuals within pairs?
Scale the y axis as power 10 values in R
random subsample with uniform distribution in R
Draw nearest value from sorted data frame into unsorted data frame
Looping over a vector and check for existence of data.frames with the same name
R how to conditionally update a numeric value in a data frame