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maxgfr/getValue.ts

Last active November 21, 2023 13:58
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getValue with type inference in typescript
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getValue.ts
const getValue = <TObj, Tkey extends keyof TObj> (obj: TObj, key: Tkey) => obj[key]
const result = getValue({a: "hello", b: 2, c: true}, "a")
console.log(result) // defined as string
const result2 = getValue({a: "hello", b: 2, c: true}, "b")
console.log(result2) // defined as number
const result3 = getValue({a: "hello", b: 2, c: true}, "c")
console.log(result3) // defined as boolean
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