如何将我的单个对象转换为可迭代实例，以便我可以将其与另一个数组合并?

Question

我有一个对象和一个对象数组，现在我尝试使用扩展运算符合并它们，如下所示：

let singleObject = { name: 'John', age: 20 }
let arrayOfObjects = [
{ name: 'Ben', age: 25 },
{ name: 'Casey', age: 30 }
]
let mergedArray = [...singleObject, ...arrayOfObjects];

但是，这不起作用，因为singleObject只是一个对象，而arrayOfObjects是一个对象数组。

所以我想知道我是否应该使用不同的方式将对象与数组合并，或者我是否应该以某种方式使对象可迭代？

Answer 1

你可以改变

let mergedArray = [...singleObject, ...arrayOfObjects];

自

let mergedArray = [{...singleObject}, ...arrayOfObjects];

或

let mergedArray2 = Object.assign([], singleObject, ...arrayOfObjects);

let singleObject = { name: 'John', age: 20 }
let arrayOfObjects = [
{ name: 'Ben', age: 25 },
{ name: 'Casey', age: 30 }
]
let mergedArray = [{...singleObject}, ...arrayOfObjects];
console.log(mergedArray)
let mergedArray2 = Object.assign([], [singleObject, ...arrayOfObjects]);
console.log(mergedArray2)

Answer 2

你可以像这样将yopur对象推到数组中，而不是连接

let singleObject = { name: 'John', age: 20 }
let arrayOfObjects = [
{ name: 'Ben', age: 25 },
{ name: 'Casey', age: 30 }
]
arrayOfObjects.push(singleObject);
console.log(arrayOfObjects);

Answer 3

您可以按如下方式使用Array.of：

let singleObject = { name: 'John', age: 20 }
let arrayOfObjects = [
{ name: 'Ben', age: 25 },
{ name: 'Casey', age: 30 }
]
let mergedArray = [...Array.of(singleObject), ...arrayOfObjects];
console.log(mergedArray);

Answer 4

试试这个

let singleObject = { name: 'John', age: 20 }
let arrayOfObjects = [
{ name: 'Ben', age: 25 },
{ name: 'Casey', age: 30 }
]
let mergedArray = [{...singleObject}, ...arrayOfObjects];
console.log(mergedArray);