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Using ML language, to write a function foo whose type is: ('a -gt; 'b) -gt; ('b list -gt; 'c) -gt; 'a -gt; 'c list (By the way how to solve this...
Using ML language, to write a function foo whose type is:
('a -> 'b) -> ('b list -> 'c) -> 'a -> 'c list
(By the way how to solve this kind of questions?)