Hi iam trying to switch to Arrow exception handing...

# arrow

[Tower Guidev2]

Hi
iam trying to switch to Arrow exception handing within my current android application
it appears to working ok up to now
i would appreciate some advice on the following code
is this a valid use of "`either {}`" with a single "`bind()`" containded within it?
is there any "better" alternative?

val work: Either<DatasourceException, *> = either { persistOutcome().bind() }

[raulraja]

hi @Tower Guidev2, that would be the same as just:

val work = persistOutcome()

[simon.vergauwen]

Hey @Tower Guidev2,

Having either { } with a single bind() is redundant and equivalent to persistentOutcome().

If you're trying to capture any unexpected exceptions you should use Either.catch and mapLeft to map Throwable to your error domain.

[Tower Guidev2]

thanks for confirming i was "correct" to feel uneasy about this 😄

[Youssef Shoaib [MOD]]

remember 2 things:
1. Every call to bind inside an effect block (e.g. an either block) corresponds to a flatMap call
2. The return value of an effect block corresponds to the "preferred" or Right side of the effect type (e.g. Either.right)
and so, the code examples is practically equivalent to this:

persistentOutcome().flatMap { Either.Right(it) }

and so you're turning a Right result into a Right result of the same exact value and a Left result into itself, and so in both cases it's just a more-convoluted identity