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Discover a simplified method to `squash` repetitive variable declarations in TypeScript when using the same function.
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This video is based on the question https://stackoverflow.com/q/64728398/ asked by the user 'maidi' ( https://stackoverflow.com/u/4716214/ ) and on the answer https://stackoverflow.com/a/64728480/ provided by the user 'Sergey' ( https://stackoverflow.com/u/5002748/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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How to Squash Variable Declarations in TypeScript with Elegance

Variable declarations can often become repetitive, especially when you're calling the same function with different parameters. This not only makes the code harder to read but also clutters your workspace. If you're writing in TypeScript and facing this issue, you're not alone. Let's tackle the problem of repetitive variable declarations head-on!

The Problem with Redundant Declarations

Consider the following code snippet:

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Here, you are repeatedly calling myFunction with the same first argument (param) but different string arguments. This redundancy can make maintenance difficult and your code less readable.

A Sleek Solution: Create a Utility Function

Fortunately, there's an elegant solution that can help you streamline these variable declarations. By creating a small utility function, you can consolidate variable instantiation into a single, elegant call.

Step-by-Step Guide to Creating Your Utility Function

1. Define Your Function

Start by defining a function named createVars. This function accepts a function reference (fn), a common parameter (common), and a rest parameter (...strArgs) for your string arguments.

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2. Utilize the Function

You can now use the createVars function to instantiate your variables in a more concise manner. Here’s how it works:

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How It Works

Object.fromEntries: This method transforms an array of key-value pairs into an object. In our case, each key corresponds to a string passed in strArgs, and each value is the result of calling fn with common and the string key.

Destructuring Assignment: By destructuring the returned object, you can directly assign the variables in a clean and readable manner.

Conclusion

By implementing the createVars function, you can significantly reduce redundancy in your TypeScript code while enhancing readability. This not only makes your code cleaner but also easier to maintain. Next time you find yourself with multiple similar variable declarations, remember this elegant solution and leverage it to keep your codebase tidy and efficient.

Happy coding!