How to Push to an Array Using Another Array's Position in JavaScript

Learn how to dynamically `push` data into an array using its name referenced through another array in JavaScript.
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This video is based on the question https://stackoverflow.com/q/66566812/ asked by the user 'm4tt' ( https://stackoverflow.com/u/4667153/ ) and on the answer https://stackoverflow.com/a/66566928/ provided by the user 'Nina Scholz' ( https://stackoverflow.com/u/1447675/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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Pushing to an Array Using Another Array's Position in JavaScript

JavaScript arrays are a fundamental part of modern web development, allowing developers to store and manipulate collections of data efficiently. However, you might encounter a situation where you want to push values into an array whose name is determined dynamically—specifically using another array. This post will address that need and provide a clear solution.

The Problem

Imagine you have an array of strings that represent the names of other arrays. For example:

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You want to add an element to arrOne by simply using its name from stringsArray, like this:

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However, this approach will not work as expected because you cannot directly call an array variable by its name as a string. Instead, we will convert this problem into a solution that allows us to reference the arrays dynamically.

The Solution

To achieve this, we can use an object to hold references to each of the arrays. This object acts as a map, allowing us to access the desired array by the string name from stringsArray.

Step-by-Step Breakdown

Create your Arrays: Define the arrays you want to manipulate.

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Set up the Reference Object: Create an object that contains references to each of your arrays.

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Use the Strings Array: Use the original stringsArray to determine which array to modify.

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Push the Value: Use bracket notation to access the correct array and push your value into it.

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Verification: Use console.log to check that the value was successfully added.

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Complete Code Example

Here's how the complete code would look:

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Final Thoughts

By following these steps, you can dynamically push values into arrays using their names stored in another array. This approach not only simplifies the process but also enhances the flexibility of your code, allowing for more dynamic and interactive JavaScript applications.

Are you ready to explore more advanced JavaScript techniques? Happy coding!

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