Re: [Haskell-cafe] Chaining a map over lists with lenses

Il giorno 10/ott/2014, alle ore 16:36, Daniel Trstenjak ha scritto:

Hi Nicola,

there's 'traversed' to access every entry of a traversable structure, e.g. appending a "X" at the end of each 'otherField':

t & myField . traversed . otherField %~ (++ "X")

And there's '^..' to return a list of each entry of a traversable structure:

t ^.. myField . traversed . otherField

Thank you for both the answers! So my error was to presume that everything can be done with (^.) (which is view, if I’m correct). So I have to understand now, what is the & operator?

Greetings, Daniel

Thank you, Nicola