haskell removes all occurrences of a given value from within a list of lists

Question

I would like to remove all occurrences of a given value from within a list of lists. For example, input: ``` 'a' ["abc", "bc", "aa"] ``` output: ``` ["bc", "bc", ""] ``` so far: ``` remove :: Eq a => a -> [[a ]] -> [[a ]] remove y xs = filter(\x -> x/= y) xs ``` I'm getting an error, thank you in advance.

Accepted Answer

You need to map over the outer lists.

```
remove y xs = map (filter(\x -> x/= y)) xs
```

You don't actually need a lambda here, nicer:

```
remove y xs = map (filter(/=y)) xs
```

haskell removes all occurrences of a given value from within a list of lists

Solution

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