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Object.keys() should return Array<keyof T> #15295

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felixfbecker opened this issue Apr 20, 2017 · 2 comments

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Contributor

felixfbecker commented Apr 20, 2017

TypeScript Version: 2.2.1 / nightly (2.2.0-dev.201xxxxx)
2.3.0

Code

const test = { a: 1, b: 2 }
for (const key of Object.keys(test)) {
  console.log(test[key]) // should not error
}

// Current
keys(o: any): string[]
// Better
keys<T>(o: T): Array<keyof T>

Contributor

blakeembrey commented Apr 20, 2017

Remember to check the closed issues 😄 (see #13254).

RyanCavanaugh added the Duplicate label

Contributor Author

felixfbecker commented Apr 20, 2017

:(

felixfbecker closed this as completed

jwbay mentioned this issue

Update type definition of Object.keys #17267

Closed

MartinJohns mentioned this issue

Change type definition of Object.keys and for..in loop #24243

Closed

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