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!
Find state names that start with the letter N
Make a simplified barcode
Get the length of a given vector
Getting the indices from a matrice
Find the nearest integer
Find Missing Number
Decrypt the cypher using XOR encryption (for beginners)
Replicate elements in vectors
Chess ELO rating system
Find my secret number
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