PickByType<T, U>
MediumP2Coding
Implement PickByType<T, U>: build an object type with only the properties of T whose value type is assignable to U.
Tests your type must pass
interface Model {
name: string
count: number
isReadonly: boolean
isEnable: boolean
}
type cases = [
Expect<Equal<PickByType<Model, boolean>, { isReadonly: boolean; isEnable: boolean }>>,
Expect<Equal<PickByType<Model, string>, { name: string }>>,
Expect<Equal<PickByType<Model, number>, { count: number }>>,
Expect<Equal<PickByType<Model, Date>, {}>>,
]Hints
Give it a real attempt first. Run shows which examples fail.
Saved automatically
TypeScript
Run and Submit type-check your solution against the tests. ⌘Enter runs, ⌘⇧Enter submits.