javascript - 在javascript和react中比较两个数组并在此基础上过滤一个数组

Question

我正在尝试比较两个对象数组，如下所示:

const obj1 = [
        {name:"Mark"},
        {name:"David"},
        {name:"Ellie"},
        {name:"Zuank"},
        {name:"Philip"},
        {name:"Den"},
    ]
    const obj2 = [
        {name:"Mark"},
        {name:"David"},
        {name:"Zuank"},
        {name:"Philip"},
    ]

我想检查第二个对象中是否存在每个对象的名称。如果是，我想将该对象推送到一个新数组，并将名为“Matched”的新属性添加到每个值为“true”的对象。否则，Matched 属性将为 false。这是我想要达到的最终结果:

  const res = [
        { name: "Mark", matched: true },
        { name: "David", matched: true },
        { name: "Ellie", matched: false },
        { name: "Zuank", matched: true },
        { name: "Philip", matched: true },
        { name: "Den", matched: false },
    ]

--编辑这是我到目前为止所尝试过的:

obj1.map((element, index) => {
        if (obj2[index].name === element.name) {
            resArr.push({ name: element.name, matched: true })
        }
        else {
            resArr.push({ name: element.name, matched: false })
        }
    })

Answer 1

您可以在 obj2 上使用 some 执行 map obj1 来检查 obj1 元素是否位于 obj2

const obj1 = [
  { name: "Mark" },
  { name: "David" },
  { name: "Ellie" },
  { name: "Zuank" },
  { name: "Philip" },
  { name: "Den" },
]

const obj2 = [
  { name: "Mark" },
  { name: "David" },
  { name: "Zuank" },
  { name: "Philip" },
]

const res = obj1.map((el1) => ({
  name: el1.name,
  match: obj2.some((el2) => el2.name === el1.name),
}))

console.log(res)