Скачать или смотреть How to Convert a String in Dot Notation into a Nested Object in JavaScript

Discover how to easily transform a dot notation string into a nested object in JavaScript using simple methods like split and map!
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This video is based on the question https://stackoverflow.com/q/63254776/ asked by the user 'Croisade' ( https://stackoverflow.com/u/11580161/ ) and on the answer https://stackoverflow.com/a/63255140/ provided by the user 'Arthur Rubens' ( https://stackoverflow.com/u/10196301/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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How to Convert a String in Dot Notation into a Nested Object in JavaScript

Have you ever found yourself with a string in dot notation, and wished you could easily convert it into a nested object structure? If so, you’re in the right place! In this guide, we'll tackle the problem of transforming a dot notation string into a nested object in JavaScript, providing a clear and systematic approach to achieving this.

Understanding the Problem

Let’s take a look at the string and value we wish to convert:

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The desired output is a nested object structure that reflects the dot notation of the string, with the provided value at the deepest level:

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The Solution

To achieve this, we can utilize the split and map methods in JavaScript. Below, I’ll break down the solution step-by-step.

Step 1: Initialize Variables

We start by initializing an empty object, which will hold our final nested structure, and a pointer variable to keep track of our current position in the object.

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Step 2: Split the String

The next step is to split the string using the dot (.) separator. This gives us an array of keys that we will use to build our nested object.

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Step 3: Build the Nested Object

We can then loop through the keys using the map method. For each key, we create an empty object if it's not the last item in the list, or assign the final value if it is:

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Step 4: Display the Result

Finally, we can output the results to the console to ensure we have constructed the object as expected:

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Complete Example

Here’s the full implementation of the solution combined:

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Conclusion

And there you have it! By following these simple steps and using the split and map methods, you can easily transform a string in dot notation into a nested JavaScript object. This method is not only efficient but also clear, allowing for easy comprehension and modification.

Feel free to experiment with different dot notation strings and values, and watch as your code dynamically constructs nested objects. Happy coding!