gistfile1.hs

-- Q4 Write a function that takes an argument x and returns a lazy sequence that has
-- every third number, starting with x. Then write a second function that includes every fifth
-- number beginning with y. Combine these functions through composition to return every eighth 
-- number beginning with x + y.
  
  -- sooooo... the first solution to the first two was kind of given in the book (the myrange
  -- function) and i don't fully get the third part. From what i understand about function composition
  -- the return type of first function must match the argument type of the second function in the chain
  -- this makes complete sense; if f . g = \x -> f (g x), the (g x) must result in something f can take
  -- in this case both functions takes a number but returns a sequence. This sequence cannot be an
  -- input to the second function. I am not sure this question is well formulated.
  
  -- One could use zip to combine the output of these functions (which would produce the result
  -- requested), however that is not function composition.
  
  everyN step start = start:(everyN step (start + step))
  
  every3rd = everyN 2
  every5th = everyN 4