a. Evaluate the expression mystery [2, -3, 4, -5]. b. Define the above function directly and recursively without using any high-order helper functions such as foldl, filter, map, and similar ones of your own.

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QUESTION 18
Consider the following Haskell function named mystery.
mystery y = foldl (*) 10 (filter (\x->(x > 0]] (map (x->(-x)] y]]
%3D
a. Evaluate the expression mystery [2, -3, 4, -5).
b. Define the above function directly and recursively without using any high-order helper functions such as foldl, filter, map, and similar ones of your own.
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Transcribed Image Text:QUESTION 18 Consider the following Haskell function named mystery. mystery y = foldl (*) 10 (filter (\x->(x > 0]] (map (x->(-x)] y]] %3D a. Evaluate the expression mystery [2, -3, 4, -5). b. Define the above function directly and recursively without using any high-order helper functions such as foldl, filter, map, and similar ones of your own. For the toolbar, press ALT+F10 (PC) or ALT+FN+F10 (Mac). BIUS Paragraph Arial 14px A v 10 !!!
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