!!! Does that mean we can finally call `.map` on a union of arrays instead of an array of unions?
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False alarm everyone, but I still love the work that TS team does
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"Improved behavior for calling union types" finally!

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Keep up the good work guys, TypeScript is the language of the future!
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Any chance to fix this regression before the final release? It's making really hard to use redux with Typescript:https://github.com/Microsoft/TypeScript/issues/29012 …
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Am I the only one waiting for a '?.' conditional operator to be implemented?
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No ! But the typescript team has made a conscious and in my opinion wise decision to wait for TC39 optional chaining proposal to finalize.
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I think one example has the incorrect error message: f("apple"); // error - Argument of type '"red"' is not assignable to parameter of type '"orange"'.
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It takes the error message from the next example which appears correct.
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Thanks for improved performance in composite projects, I will try it!
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