sds

sds has asked 109 questions and find answers to 232 problems.

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sds questions

Summarize a data.table across multiple columns
Unpack only the first few columns from the CSV reader?
Mean of list of coumns by group [duplicate]
Regular expression which matches at least two words from a list
Why is tz-naive Timestamp converted to integer while tz-aware is kept as Timestamp?
Default values for missing fields in a left join?
PySpark.RDD.first -> UnpicklingError: NEWOBJ class argument has NULL tp_new
Select rows with identical columns from a data frame
Summarize a data.table with unreliable data
How to find out whether getLogger created a new object?

sds answers

How does read-line work in Lisp when reaching eof?
Nested mapcars in common lisp
Reducing a circular list in Common Lisp
Merging two vectors with fill-pointer in the resulting vector
string-to-number and insert give control characters (e.g., ^C, ^D) instead of numbers (e.g., 3, 4)
open include files in emacs as you can in msvc (visual c++)
PySpark.RDD.first -> UnpicklingError: NEWOBJ class argument has NULL tp_new
CLISP: Returning stdout, stderr, and retcode from a shell command
Find the order of a function
How to define a function-local constant in Common Lisp?