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let vs-var - Variables and Data Types

Deep Learning Path with Rest Parameters

Path: /courses/javascript/basics/variables/let-vs-var
4
Path Depth
javascript
Category
basics
Course
variables
Section

Rest Parameter Route

File: /courses/[...path].astro
Handles: /courses/any/nested/path/structure
Current path: ["javascript", "basics", "variables", "let-vs-var"]
Parsed as: Category: "javascript", Course: "basics", Section: "variables", Content: "let-vs-var"

Variables and Data Types

Let Vs-Var

This is the detailed content for "let-vs-var" within the Variables and Data Types lesson. The rest parameter allows us to handle unlimited nesting depth in our course structure.

Related Topics in this Lesson:

Scope Hoisting Constants

Other Lessons in JavaScript Basics

Variables and Data Types
4 topics
Functions
4 topics
Objects and Arrays
4 topics

Try These Deep Learning Paths

/courses/javascript/basics → Course overview
/courses/javascript/basics/variables → Variables lesson
/courses/javascript/basics/variables/scope → Scope topic
/courses/react/fundamentals/components/jsx-syntax → React JSX topic

Rest Parameter Implementation

---
// File: /courses/[...path].astro
const { path } = Astro.params;

// Parse unlimited depth path
const pathParts = path ? path.split('/').filter(Boolean) : [];
const [category, course, section, ...remaining] = pathParts;

// This route handles:
// /courses/javascript
// /courses/javascript/basics
// /courses/javascript/basics/variables
// /courses/javascript/basics/variables/scope
// /courses/any/deep/nested/path/structure
---

<h1>{category} → {course} → {section}</h1>
Back to Router Examples