Josh Goldberg 3/30/2023

TypeScript Contribution Diary: Tuple Types Indexed by a Type Parameter

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The article details the process of diagnosing and fixing TypeScript issue #50875, where using a spread operator on a tuple accessed via a generic type parameter (N extends number) incorrectly infers the resulting type. It walks through the bug reproduction, investigation into the type checker, and the eventual pull request to resolve the issue.

TypeScript Contribution Diary: Tuple Types Indexed by a Type Parameter

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