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just in case you aren't aware: the unicode arrows have been deprecated since 2.13.0 due to precedence issues

Priorities of arrow operators variants · Issue #11210 · scala/bug

There are different priorities for two variants of arrow operators: $ scala Welcome to Scala 2.12.7 (OpenJDK 64-Bit Server VM, Java 1.8.0_181). Type in expressions for evaluation. Or try :help. sca...

Owen Nelson

@theomn

Sep 28, 2021

Can you imagine having semantics change based on how cute you write your scala... That's a yikes from me.

Aly

@Fish_CTO

Sep 28, 2021

One of my biggest gripes with Scala is weird associativity rules. Especially visible in the difference between right-associative scastie.scala-lang.org/2FbQF10HR2WInU and left-associative scastie.scala-lang.org/h3M3JVwSQu2Ytc Everything is flipped around and it's a mess.

Aly

@Fish_CTO

Sep 28, 2021

I put parentheses on everything that's not an associative expression by default (i.e. i'll write `5 + (4 * 3)` even though I don't need to) so the other stuff doesn't bother me that much thankfully.

Brendan Zabarauskas

@brendanzab

Sep 28, 2021

wat, are the precedences and associativies hard-coded?

Aly

@Fish_CTO

Sep 28, 2021

Yes. An operator is right-associative if it ends with a colon, except for => and -> which are hardcoded to be right-associative.

omg

This is why `a +: b` is actually a call to `b.+:(a)` on collections ;)

what is

Let's reify the expression `1 +: List(2, 3)`

Replying to

oh is this the silly `.`-less method call notation, gah

5:30 AM · Sep 28, 2021Twitter Web App

Replying to

I never liked this :(

Owen Nelson

@theomn

Sep 28, 2021

I have a hard time reading Haskell since I need to lookup the docs for every single thing I see just to decide which vales are being received by which functions.

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