Implement map() in TypeScript

[placid yew]

Hi, I'm trying to replicate the map() method of JavaScript using TypeScript, but it seems like the implicit Type annotation for map() method is restricting me do the same. Can anyone please help here. I'm new to TypeScript but want to migrate the existing codebase in TS.

Here's the playground link:
https://www.typescriptlang.org/play?#code/MYewdgzgLgBAtgQwB4wLwwN4CgYwGYByCcApgFwwDkAsspQDQ4wIDm5MATAGxYC+WWPAFcwwKAEtwMNlADSJAJ4A1BABshJADwAVGCSRQSYACYQYIAEYArEmPowAqnoNHTMANaKQeGNoB8ABSWVhTaAJSYTABOJFBCUWD4ImKSYAGeChQOEdi4uDFxCebWANoZALoA3Ez8-FigkLAAbmoaZugA8ta2UAB0GRABiEhhWL2IAA4BMvLKrSRDyGFh1fXgECCqJL2qICwBLeokEGFAA

[open junco]

@placid yew Here's a shortened URL of your playground link! You can remove the full link from your message.

lil' joy#9248

Playground Link

Preview:```ts
const max = {
fName: "Max",
age: 26,
}

function getKeyValue<
T extends object,
U extends keyof T

(obj: T) {
return function (key: U) {
return obj[key]
}
}

const values = Object.keys(max).map(getKeyValue(max))

console.log(values)```

You can choose specific lines to embed by selecting them before copying the link.

무언가#0213

Playground Link

Preview:```ts
const max = {
fName: "Max",
age: 26,
}

function getKeyValue<
T extends object,
U extends keyof T

(obj: T) {
return function (key: U) {
return obj[key]
}
}

const values = (
Object.keys(max) as Array<keyof typeof max>
).map(getKeyValue(max))

console.log(values)```

You can choose specific lines to embed by selecting them before copying the link.

[ocean bluff]

casting Object.keys(max) will work

[placid yew]

!resolved

Thank you so much

[ocean bluff]

by the way, why don't you just use Object.values()?

[open junco]

무언가#0213

Playground Link

Preview:```ts
const max = {
fName: "Max",
age: 26,
}

function getKeyValue<
T extends object,
U extends keyof T

(obj: T) {
return function (key: U) {
return obj[key]
}
}

const values = Object.values(max)

console.log(values)```

You can choose specific lines to embed by selecting them before copying the link.

[placid yew]

Actually I have asked the question for a simplified replica of a large snippet where it was not possible to do the same. In my existing codebase many changes have to be done while migrating.