Without geometry, life is pointless [Another interesting programming puzzle worked through]

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I happened across another coding puzzle recently that caught my interest. (If you're curious, here is a link to the puzzle I discussed a few weeks ago about implementing a weird kind of addition .) The problem this time is as follows: You are given an array of coordinates, coordinates[i] = [x,y] , where [x,y] represents the coordinate of a point. Check if these points make a straight line in the…

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