Question

我有一个对象数组：

users = [
  {userId: 23, userName:"foo"},
  {userId: 34, userName:"wrong"},
  {userId: 45, userName:"baz"},
  {userId: 56, userName:"..."},
]

让我们说我想找到所有具有userName属性的对象，并将值替换为updatedUser：

updatedUser = {"foo"}

所以在这种情况下，我将得到一个新的数组，例如：

users = [
  {userId: 23, userName:"foo"},
  {userId: 34, userName:"foo"},
  {userId: 45, userName:"foo"},
  {userId: 56, userName:"foo"}
]

我正在使用lodash，但不介意原生。

请帮忙吗？

Answer 1

为什么需要lodash，您可以按照以下步骤操作。

users.forEach((el)=>{el.userName= "foo";})

users = [
  {userId: 23, userName:"foo"},
  {userId: 34, userName:"wrong"},
  {userId: 45, userName:"baz"},
  {userId: 56, userName:"..."}
]

users.forEach((el)=>{el.userName = "foo";})
console.log(users);

仍然，如果您更喜欢使用lodash，可以尝试以下操作。

_.setProperty( users, 'userName', 'foo' );

Answer 2

您可以分配一个具有所需值的新对象。

var users = [{ userId: 23, userName: "foo" }, { userId: 34, userName: "wrong" }, { userId: 45, userName: "baz" }, { userId: 56, userName: "..." }],
    update = { userName: "foo" },
    result = users.map(o => Object.assign({}, o, update));

console.log(result);

Answer 3

您可以为用户Array.prototype.map并为每个元素覆盖userName字段

const users = [
  {userId: 23, userName:"foo"},
  {userId: 34, userName:"wrong"},
  {userId: 45, userName:"baz"},
  {userId: 56, userName:""}
];

const result = users.map(u => ({...u, userName: "foo"}));
console.log(result);

查找属性，然后替换其所有值-lodash

3 个答案: