Скачать или смотреть Removing an Element from an Array of Objects in JavaScript

Learn how to efficiently copy an array of objects in JavaScript while omitting specific properties. This guide focuses on removing the `buying_price` property from objects during the copying process.
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How to Remove an Element from an Array of Objects during Copy to Another Array in JavaScript

When working with arrays of objects in JavaScript, you may often find yourself in a situation where you need to copy an array while excluding certain properties. In this post, we’ll explore how to remove the buying_price property from an array of objects during the copying process. This task is not only common but also a very useful technique in manipulating data effectively, especially after an API call where data might include unnecessary properties.

The Problem

Let's consider a practical example. After making an API call, you receive the following array of objects, representing fruit products:

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In this array, each object contains three properties: name, price, and buying_price. However, for your specific needs, you only want to use the name and price properties in the copied array, discarding the buying_price. The desired output for the copied variable should look like this:

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The Solution

To achieve this copy while omitting the buying_price, you can utilize the map function available in JavaScript. The map function creates a new array populated with the results of calling a specified function on every element in the original array.

Step-by-Step Breakdown

Using map to Transform the Array: You will map over the original array and return a new object that only includes the properties you want.

Object Creation Through Mapping: You can implement the mapping function in two different ways as discussed below.

Method 1: Basic Return Function

You can write the function as follows:

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In this approach, you access each object v from the original array and return a new object comprising only the name and price properties.

Method 2: Object Destructuring

JavaScript's object destructuring can make your code more concise. Here’s how you can do it:

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In this variation, you destructure the properties directly from each object. This results in cleaner and more readable code. The new object is automatically created with the properties specified.

Conclusion

Whether you choose the basic return function or the destructuring method, both approaches are effective for copying an array of objects while removing unwanted properties. By applying these techniques, you can clean up your data easily and keep your code efficient and readable.

With practice, this method will become a handy tool in your JavaScript programming toolkit, particularly when working with APIs and needing to filter data structures.

Now you're ready to implement this technique in your own JavaScript projects! Happy coding!