Re: [Haskell-cafe] record update

Jonathan Geddes schrieb:

I know that record updates is a topic that has become a bit of a dead horse, but here I go anyway:

I find that most of the record updates I read and write take the form

...

someUpdate :: MyRecord -> MyRecord someUpdate myRecord = myRecord { field1 = f $ field1 myRecord , field2 = g $ field2 myRecord , field3 = h $ filed3 myRecord }

I find myself wishing I could write something more like

...

someUpdate :: MyRecord -> MyRecord someUpdate myRecord = myRecord { field1 => f , field2 => g , field3 => h }

data-accessor and similar packages may become your friends. data-accessor allows you to write: someUpdate = (field1 ^: f) . (field2 ^: g) . (field3 ^: h)