val result = runBlocking { parse("1") ...

# arrow

[renghen pajanilingum]

val result = runBlocking {
parse("1")
}

val resultFx = IO.fx{
!effect{ parse("werew")} // an exception into an effect
}.unsafeRunSync()

[pakoito]

fx here is redundant btw 😄

[pakoito]

IO { parse("werew") } just works

[pakoito]

does the same thing

[pakoito]

if you use this approach use attempt() to convert it to an either

[pakoito]

IO { parse("werew") }.attempt().unsafeRunSync()

[renghen pajanilingum]

attempt creates another another either,
I think then code the should be
IO{"eqr".toInt()}.attempt().mapLeft("wrong string value").unsafeRunSync()

[pakoito]

works for me 🙂

[renghen pajanilingum]

paco I think much much earlier I asked a question about STM

[renghen pajanilingum]

was it you who told to come to be on this channel ?

[renghen pajanilingum]

I asked it on gitter

[pakoito]

what do you want to do with STM? We have bracket and bracketCase for this

[renghen pajanilingum]

i want to do transfer thing

[renghen pajanilingum]

between 2 accounts

[renghen pajanilingum]

how does brackcase help

[pakoito]

bracketCase({ if (it !is Success) rollback() }) {
  remove().flatMap { add() }
}

[pakoito]

that’s the pattern

[renghen pajanilingum]

ok i wil try to make for a transaction of money betweeen 2 acccounts