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

[felixfbecker]

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>

[blakeembrey]

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

[felixfbecker]

:(