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Array map does not carry tuple size #49201

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ilibar-zpt opened this issue May 21, 2022 · 2 comments
Closed

Array map does not carry tuple size #49201

ilibar-zpt opened this issue May 21, 2022 · 2 comments

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@ilibar-zpt
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Bug Report

🔎 Search Terms

array map tuple size type

🕗 Version & Regression Information

  • This is the behavior in every version I tried, and I reviewed the FAQ for entries about tuples

⏯ Playground Link

Playground link with relevant code

💻 Code

const a = [1,2] as [number, number]
const b = a.map(v => String(v))

🙁 Actual behavior

type of b is string[]

🙂 Expected behavior

type of b is [string, string]
@whzx5byb
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Duplicate of #29841

@ilibar-zpt
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nice

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@whzx5byb @ilibar-zpt