Additional test cases have been added.
Extract leading non-zero digit
Back to basics 14 - Keywords
middleAsColumn: Return all but first and last element as a column vector
Symmetry of vector
The sum of the numbers in the vector
Join Strings with Multiple Different Delimiters
Remove the two elements next to NaN value
Get the elements of diagonal and antidiagonal for any m-by-n matrix
Return unique values without sorting
Create a vector whose elements depend on the previous element
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