<@U12AGS8JG> PR's up :satisfied: <https://github.com/kotest/kotest/pull/1733>

# kotest

[mitch]

@sam PR's up 😆 https://github.com/kotest/kotest/pull/1733

[sam]

ok cool will take a look shortly

[sam]

I can't see where the edge cases are calculated

[sam]

Am I going mad

[mitch]

It's in Arb.flatmap. the function already does that.

[mitch]

That list.flamap(otherList)

[sam]

In bind

[mitch]

Yeah bind uses flatmap, downthe bottom in the private function

[mitch]

private fun <A, B, C> Gen<A>.bind(other: Gen<B>, fn: (A, B) -> C): Arb<C> {
   val arb = when (this) {
      is Arb -> this
      is Exhaustive -> this.toArb()
   }

    return arb.flatMap { a ->
      when (other) {
         is Arb -> other.map { fn(a, it) }
         is Exhaustive -> other.toArb().map { fn(a, it) }
      }
   }
}

[sam]

Ah got it

[sam]

Merged

[mitch]

🎉 thanks @sam!

[sam]

Thanks for the work

[mitch]

All good! Thanks for your support Sam you've been a champ. I'm quite sure that's most if not all of the core functions migrated away from the old arb builder.

[sam]

Yep things much better. Looking solid for inclusion in a 4.3 release.