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If you are interested to look at another approach - this is my sloution:
https://www.codewars.com/kata/reviews/5a47b7e1ae23886317000109/groups/5e2f0f63191cfe000172f33a
It uses backtracking technique - i am guesing about next value (0 or 1) for each cell, and if the col and row correct - move to next cell recursively.
But, it is still not efficent enought to deal with 15x15 kata)
Definitely not the prettiest or most efficient code I've ever produced. I should have done some research into tested and documented approaches to the problem. Limitations of my approach showed up rather quickly when I tried to adapt this to the 15x15 nonograms.
Oh my god.
#persevere
This was my first foray into memoization and tried to adapt online examples. Definitely something I need to practice and improve upon.