Loading collection data...
Collections are a way for you to organize kata so that you can create your own training routines. Every collection you create is public and automatically sharable with other warriors. After you have added a few kata to a collection you and others can train on the kata contained within the collection.
Get started now by creating a new collection.
Rule number 1 it must erase all characters except +-<>,.[].
Originally this was devised for Haskell. In haskell this exercise not just makes sense, but it exposes one of the core features of Haskell, namely lazy evaluation. In javascript, I think this is a "can be done", but not easily or neatly and the usefulness is more debatable. Don't worry about it too much if you are coming from Javascript.
If you still want to understand what this is about:
generategives something, that represents an infinte 2D lattice.Lazyness comes in handy in representing infinte sctructures..You have to find a particular point on the lattice (grid/mesh whatever you want to call it), but while you are searching, you have to make sure you don't fall into infinite loops. For instance you can't just check the first row first, as if it doesn't contain the point then you never finish.
Upon going through this discussion, the following instructions may help in solving the kata:
"Find the greatest difference in length for any possible pairing of strings between Array1 and Array2".