如何替換數組中的指定對象

let arr = [
  { id: 1, name: "hong" },
  { id: 2, name: "huang" },
  { id: 3, name: "lan" }
]
let obj = { id: 2, name: "gyang"}
arr = arr.map(item => item.id === obj.id ? obj : item)

console.log(JSON.stringify(arr))