> > | It could be generalized to the following (no change to the definition):
> > |
> > | deleteBy :: (a -> b -> Bool) -> a -> [b] -> [b]
> >
> > Indeed, and
> >
> > deleteFirstsBy :: (a -> b -> Bool) -> [b] -> [a] -> [b]
>
> and
> intersectBy :: (a -> b -> Bool) -> [a] -> [b] -> [a]
Although curiously, its dual 'unionBy' cannot also take the more
general type
unionBy :: (a -> b -> Bool) -> [a] -> [b] -> [a]
at least, not with its current specification in terms of 'nubBy'.
Regards,
Malcolm
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