How to manipulate the properties of the object after converting the array to an object?

Convert an array to an object by using the [Object.assign()](https://developer.mozilla.org/zh-CN/docs/Web/JavaScript/Reference/Global_Objects/Object/assign) method, which Accepts two parameters: the target object and the source object to be copied to the target object. The converted object properties can be accessed and modified through dot syntax or square bracket syntax, and can be used in scenarios such as server data conversion, form value storage, and dynamic UI generation in actual development.

Convert the array into an object and operate its properties

Arrays and objects are two commonly used data structures. In actual development It is often necessary to convert arrays into objects for easy operation. This article will introduce how to convert an array into an object and how to manipulate the properties of the object after conversion.

1. To convert an array to an object

you can use [Object.assign()](https://developer.mozilla.org/zh -CN/docs/Web/JavaScript/Reference/Global_Objects/Object/assign) method converts an array into an object. This method accepts two parameters: the target object and the source object to be copied to the target object.

const arr = ['foo', 'bar', 'baz'];
const obj = Object.assign({}, arr);

console.log(obj); // 输出：{0: "foo", 1: "bar", 2: "baz"}

This code copies the elements in the array arr to a new empty object obj, with indices 0 to 2 as the object's properties.

2. Manipulate object properties

After converting the array into an object, you can use dot syntax or square bracket syntax to access the properties of the object.

console.log(obj.0); // 输出：foo
console.log(obj['1']); // 输出：bar

You can also use the assignment operator to modify the properties of an object.

obj.2 = 'qux';
console.log(obj); // 输出：{0: "foo", 1: "bar", 2: "qux"}

Practical case

In actual development, converting arrays into objects can be used in various scenarios, for example:

• The array data returned by the server is converted into objects to facilitate client operations.
• Store form element values ​​as objects to facilitate submission.
• Convert the data list into objects for generating dynamic UI.

Conclusion

Arrays can be easily converted into objects by using the Object.assign() method. After conversion, the object's properties can be accessed and modified using dot syntax or square bracket syntax, making it more flexible.

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