A feature that alters a function parameter and retains the changes

Seeking a method that can alter a variable like so:

private _buildUrlCategories(url: string) {
  url += ";categories=" + this.findForm.value.categories;
}

private _buildUrl() {
  let url = "/#/find";
  this._buildUrlCategories(url); //modifies the url
}

If direct modification isn't possible, I could simply return the updated url and use

url += this._buildUrlCategories(url)
.

Is achieving this feasible? Does this approach have a specific name or technique associated with it?

Answer №1

Negative, achieving that is not feasible.

As outlined in the TypeScript guideline:

TypeScript serves as a convenient shorthand for JavaScript. Its syntax encompasses ECMAScript 2015 (ES2015) syntax. Every valid JavaScript program can also be considered a TypeScript program.

In essence, TypeScript extends JavaScript functionality while adhering to the fact that arguments are typically not passed by reference in JavaScript (with the exception of objects).

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