Typescript object pick and omit functions

tools.ts

// typescript versions of https://stackoverflow.com/a/56592365/1207489
const pick = <T extends {}, K extends keyof T>(obj: T, ...keys: K[]) => (
  Object.fromEntries(
    keys
    .filter(key => key in obj)
    .map(key => [key, obj[key]])
  ) as Pick<T, K>
);

const inclusivePick = <T extends {}, K extends (string | number | symbol)>(
  obj: T, ...keys: K[]
) => (
  Object.fromEntries(
    keys
    .map(key => [key, obj[key as unknown as keyof T]])
  ) as {[key in K]: key extends keyof T ? T[key] : undefined}
)

const omit = <T extends {}, K extends keyof T>(
  obj: T, ...keys: K[]
) =>(
  Object.fromEntries(
    Object.entries(obj)
    .filter(([key]) => !keys.includes(key as K))
  ) as Omit<T, K>
)