What scenarios are suitable for using array to object?

The concept of array to object refers to converting an array into an object to provide a consistent data format and efficient key-value access. Suitable usage scenarios: When the data structure is not standardized and complex operations need to be performed when accessing data based on key values. Practical cases: Convert shopping list arrays into objects and use dot syntax or square bracket syntax to access and modify data.

Convert array to object: Scenarios and practice

Concept of converting array to object

An array is an ordered collection in which elements are stored by index number. An object is an unordered collection in which elements are stored in the form of key-value pairs. Array to object conversion refers to the process of converting data in an array into object format.

Suitable scenarios for converting arrays to objects

• The data structure is not standardized: When the structure of the elements in the array is inconsistent, convert it Converting to objects provides a consistent data format.
• Need to access data based on key values: Using objects can quickly access data based on key values, which is very efficient when processing large-scale data.
• Need to perform complex operations: Objects support various operations such as adding, deleting and updating properties, which is useful for complex data processing tasks.

Practical case: Convert shopping list data

Suppose we have an array containing a shopping list:

const shoppingList = ["苹果", "香蕉", "橙子", "牛奶", "面包"];

We can use Object.assign() method converts array to object:

const shoppingListObject = Object.assign({}, shoppingList);

console.log(shoppingListObject);

Output:

{ '0': '苹果', '1': '香蕉', '2': '橙子', '3': '牛奶', '4': '面包' }

Now we can easily access data based on index or use dot syntax or method Bracket syntax adds, deletes or updates attributes, for example:

shoppingListObject.fruit = "苹果";
shoppingListObject[4] = "鸡蛋";

console.log(shoppingListObject);

Output:

{ '0': '苹果', '1': '香蕉', '2': '橙子', '3': '牛奶', '4': '鸡蛋', fruit: '苹果' }

By converting arrays to objects, we obtain a more flexible and structured data structure.

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