00599-medium-merge
Medium
object

Merge two types into a new type. Keys of the second type overrides keys of the first type.

For example

type foo = {
  name: string
  age: string
}
type coo = {
  age: number
  sex: string
}

type Result = Merge<foo, coo> // expected to be {name: string, age: number, sex: string}

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import type { Equal, Expect } from '@type-challenges/utils'

type Foo = {
  a: number
  b: string
}
type Bar = {
  b: number
  c: boolean
}

type cases = [
  Expect<Equal<Merge<Foo, Bar>, {
    a: number
    b: number
    c: boolean
  }>>,
]