Test if arguments of the function are all variables (workspace variables names).
Return 1 if yes, 0 if no.
For example :
length!! and not "not isempty"... good point!
Sort numbers by outside digits
Multiply a column by a row
Square Digits Number Chain Terminal Value (Inspired by Project Euler Problem 92)
04 - Scalar Equations 1
Numbers spiral diagonals (Part 1)
Permute diagonal and antidiagonal
Return a list sorted by number of consecutive occurrences
Chess ELO rating system
Sum of big primes without primes
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