Jpere838 hw1 #1
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Jpere838 hw1 #1
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jalvarado91
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Oct 11, 2017
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jalvarado91
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Looks good. Small additions
| /// 2. Powerset set returns the set of all subsets of set | ||
| let rec powerset = function | ||
| | [] -> [[]] | ||
| | x::xs -> List.collect (fun subset -> [subset; x::subset]) (powerset xs) |
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Kill the indents
let rec powerset = function
| [] -> [[]]
| x::xs -> List.collect (fun subset -> [subset; x::subset]) (powerset xs)| /// 3. Transpose an m-by-n matrix | ||
| let rec transpose = function | ||
| | (_::_)::_ as M -> List.map List.head M :: transpose (List.map List.tail M) | ||
| | _ -> [] |
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Same here
let rec transpose = function
| (_::_)::_ as M -> List.map List.head M :: transpose (List.map List.tail M)
| _ -> []| Step Three: Each recursive call gets an input that is smaller than the original input | ||
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| Clue something is wrong: The mergesort function is missing a case, which causes mergesort to be seen by | ||
| the compiler as 'a list -> 'b list instead of 'a list -> 'a list |
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... list instead of 'a list -> 'a list which tells us our merge sort is returning a list of items of a different type than given, which shouldn't be the case as we're simply sorting the elements.
shurt012
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Oct 11, 2017
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