Some programmers sure do seem to obsess over syntax but it turns out that the meaningful stuff is mostly in the semantics.
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100% agree that there are many things that work really well in typed languages that lose most of their value if you apply them to a language like Ruby (Option/Maybe and Result/Either are some similar cases that come to mind)
That said, I think that the fundamental premise works well here. I agree with you that the syntax feels half baked (it seems really weird to use an array literal here, when that does not match the syntax for construction or multiple assignment), but the interface seems fine to me
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I think that evidence that this idea works well in Scala is not very good evidence that it will work well in Ruby.
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