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  1. (<<%@~) :: Over (Indexed i) ((,) a) s t a b -> (i -> a -> b) -> s -> (a, t)

    lens Control.Lens.Lens

    Adjust the target of an IndexedLens returning the old value, or adjust all of the targets of an IndexedTraversal and return a monoidal summary of the old values along with the answer.

    (<<%@~) ::             IndexedLens i s t a b      -> (i -> a -> b) -> s -> (a, t)
    (<<%@~) :: Monoid a => IndexedTraversal i s t a b -> (i -> a -> b) -> s -> (a, t)
    

  2. (<<%~) :: LensLike ((,) a) s t a b -> (a -> b) -> s -> (a, t)

    lens Control.Lens.Lens

    Modify the target of a Lens, but return the old value. When you do not need the old value, (%~) is more flexible.

    (<<%~) ::             Lens s t a b      -> (a -> b) -> s -> (a, t)
    (<<%~) ::             Iso s t a b       -> (a -> b) -> s -> (a, t)
    (<<%~) :: Monoid a => Traversal s t a b -> (a -> b) -> s -> (a, t)
    

  3. ( #%%= ) :: MonadState s m => ALens s s a b -> (a -> (r, b)) -> m r

    lens Control.Lens.Operators

    A version of (%%=) that works on ALens.

  4. ( #%%~ ) :: Functor f => ALens s t a b -> (a -> f b) -> s -> f t

    lens Control.Lens.Operators

    A version of (%%~) that works on ALens.

    >>> ("hello","world") & _2 #%%~ \x -> (length x, x ++ "!")
    (5,("hello","world!"))
    

  5. ( #%= ) :: MonadState s m => ALens s s a b -> (a -> b) -> m ()

    lens Control.Lens.Operators

    A version of (%=) that works on ALens.

  6. ( #%~ ) :: ALens s t a b -> (a -> b) -> s -> t

    lens Control.Lens.Operators

    A version of (%~) that works on ALens.

    >>> ("hello","world") & _2 #%~ length
    ("hello",5)
    

  7. (<#%=) :: MonadState s m => ALens s s a b -> (a -> b) -> m b

    lens Control.Lens.Operators

    A version of (<%=) that works on ALens.

  8. (<#%~) :: ALens s t a b -> (a -> b) -> s -> (b, t)

    lens Control.Lens.Operators

    A version of (<%~) that works on ALens.

    >>> ("hello","world") & _2 <#%~ length
    (5,("hello",5))
    

  9. (<%=) :: MonadState s m => LensLike ((,) b) s s a b -> (a -> b) -> m b

    lens Control.Lens.Operators

    Modify the target of a Lens into your Monad's state by a user supplied function and return the result. When applied to a Traversal, it this will return a monoidal summary of all of the intermediate results. When you do not need the result of the operation, (%=) is more flexible.

    (<%=) :: MonadState s m             => Lens' s a      -> (a -> a) -> m a
    (<%=) :: MonadState s m             => Iso' s a       -> (a -> a) -> m a
    (<%=) :: (MonadState s m, Monoid a) => Traversal' s a -> (a -> a) -> m a
    

  10. (<%@=) :: MonadState s m => Over (Indexed i) ((,) b) s s a b -> (i -> a -> b) -> m b

    lens Control.Lens.Operators

    Adjust the target of an IndexedLens returning the intermediate result, or adjust all of the targets of an IndexedTraversal within the current state, and return a monoidal summary of the intermediate results.

    (<%@=) :: MonadState s m                 => IndexedLens i s s a b      -> (i -> a -> b) -> m b
    (<%@=) :: (MonadState s m, Monoid b) => IndexedTraversal i s s a b -> (i -> a -> b) -> m b
    

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