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haskellrecord

Change record values - haskell

I have this record:

data Ship = CShip {Planet::String}
    deriving Show
spaceship = CShip {Planet = "alphaCentauriBb"}

but I want to change the String on Planet. for example:

Planet = "alphaCentauriCc"

Is there a way to do this?

Solution

  • You can use the record update syntax to update the value of a field. This will create a new record value with the same field values as the old ones except for the updated fields.

    newSpaceship = spaceship {planet = "alphaCentauriCc"}

    Note that field names must be lowercase.