sds

sds has asked 103 questions and find answers to 226 problems.

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sds questions

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?
Reverse a slice of an array in-place [duplicate]
Cannot create an instance of a namedtuple subclass: TypeError: __new__() takes exactly 4 arguments (3 given)
List the "different commits"
Compute correlation of two DataFrames columnwise
Python zip magic for classes instead of tuples

sds answers

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?
How to not recurse twice in LISP
Open file from Emacs terminal without find-file
What are the generic functions defined by the standard?
What does the elisp error "Wrong type argument: sequencep, t" mean?
Decimal to Binary in Lisp - make a non-nested list
Emacs Lisp - Should you unset keys before setting them?