Скачать или смотреть Resolve the Issue of Looping through Object Keys in JavaScript to Append String

Discover a simple method to `loop through object keys` and update values effectively in JavaScript.
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Loop Through Object Keys and Append String in JavaScript

When working with JavaScript, you may encounter scenarios where you need to dynamically update an object based on certain parameters. This is particularly relevant when dealing with configuration objects where values must change based on specified conditions. In this guide, we will explore how to loop through object keys and append a string to these keys, and will show you how to effectively perform this in your code.

The Problem

Suppose you have a configuration object with initial values that need to be updated. You want to generate new keys by appending a specific string (for instance, the type of member) to the original keys. Here's a sample configuration object:

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You want to write a function that allows you to update the type and relationshipToPrimary values in the resulting object by appending to keys like dateOfBirth_ and seekingCoverage_ based on a passed type. For example:

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Your goal is to end up with objects that look like this:

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The Solution

To simplify the task, we can create a function that generates a new object without altering the original one. Below is the complete solution:

Step 1: Define the Initial Configuration

You start with your original configuration object as defined above. This will serve as the basis for generating the new values.

Step 2: Create the Update Function

You'll define a function called updateInitialValue that accepts type and relationshipToPrimary as parameters. Within this function, you will build a new object while appending the type to the necessary keys.

Here’s the complete code:

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Step 3: Generating Updated Values

You call the updateInitialValue function with desired parameters to retrieve updated values:

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Now, updatedValueApplicant will contain the following structure:

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Step 4: Checking Results

You can log the results to confirm the object constructions are correct:

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Conclusion

By following the steps outlined above, you can dynamically update an object in JavaScript by looping through its keys and appending specific values. This method enhances code readability and flexibility, providing a straightforward way to handle dynamic object creation based on different contexts. Feel free to apply this strategy whenever working with configuration objects for managing application states.

With these guidelines, we hope you find your coding journey smoother and more efficient. Happy coding!