Additional test cases have been added.
Replace NaNs with the number that appears to its left in the row.
02 - Vector Variables 2
07 - Common functions and indexing 6
Speed of car
Replace Negative(-) by 0 and positive by 1
Replace 0 indices in array with 1's
Matrix Max Finder
Check if inputted variable is a string or a number
Find the index of the lowest number in a matrix
Automatic String Editing
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