hi - is there a `foreach` equivalent for `Either` in arrow?

# arrow

[Peter]

hi - is there a foreach equivalent for Either in arrow?

[pakoito]

yes, it's traverse. Apply one effect to each element of a collection.

[pakoito]

It collects to something like an IO or an `Eval`that you'll need to exeute later

[pakoito]

oh wait

[pakoito]

for Either

[pakoito]

yeah, fold

[pakoito]

either.fold({
  IO { oneEffect() } 
}, { 
  IO { otherEffect() } 
})