Remove all trailing white spaces at the end of the input strings
Most nonzero elements in row
Find the two most distant points
Determine Whether an array is empty
Doubling elements in a vector
Test if a number is numeric or not
Day counter function
Capitalized string operations
Basics: counting digits of a number irrespective of the sign
Repetition of matrices
Raise each element to the power of its index in a matrix
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