How Can I Efficiently Extract Property Values into an Array in JavaScript?

Extracting Property Values as Arrays in JavaScript

In JavaScript, working with arrays of objects is a common scenario. A frequent task is to extract specific property values from each object and create an array containing those values. While custom functions can accomplish this, there are more elegant and idiomatic approaches.

Original Question

Given an object array with a specific structure, the goal is to extract a field (property) from each object and return an array containing those values. For instance, extracting the "foo" field should yield an array [1, 3, 5] from the following object array:

Idiomatic Solutions

Instead of using a traditional for loop and push approach, consider these idiomatic solutions:

Method 1: Array.map() with Arrow Function

Method 2: Array.map() with Object Destructuring

Function Description

Both methods utilize the Array.prototype.map() method, which transforms each element in an array using a provided callback function. In our case, the callback function extracts the specified field ("foo") from each object. The map() function returns a new array containing the transformed elements, which are then assigned to the result variable.

Reference for Array.map()

For more information on Array.prototype.map(), refer to the Mozilla Developer Network (MDN) documentation:
[https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/map](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/map)

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