Rust Linked List Implementation | Push & Pop Methods Explained | Data Structures in Rust

Rust Linked List Implementation | Push & Pop Methods Explained | Data Structures in Rust

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🔥 **Master Linked Lists in Rust – Implementing Push & Pop Methods!** 🔥\
In this Rust tutorial, we continue our deep dive into **singly linked lists**, a core data structure in programming. This session focuses on implementing **push** and **pop** methods for adding and removing elements efficiently.

What You’ll Learn in This Video:**

✅ How to create and manage a **Linked List** in Rust\
✅ Implementing the `push()` method to add elements\
✅ Implementing the `pop()` method to remove elements\
✅ How Rust’s **ownership and borrowing** affects linked lists

---

### **🚀 Why Use Linked Lists?**

🔹 **Dynamic Size:** Unlike arrays, linked lists grow and shrink dynamically.
🔹 **Efficient Insertions & Deletions:** No need for shifting elements.\
🔹 **Flexible Memory Allocation:** Nodes are created only when needed.

---

Implementing Push & Pop Methods in Rust**

```rust
use std::option::Option;
use std::boxed::Box;

// Define the node structure
data: T,
}

// Define a type alias for the link

// Define the linked list
}

// Create a new empty linked list
LinkedList { head: None }
}

// Push a new element to the front
fn push(&mut self, data: T) {
let new_node = Box::new(Node {
data,
});
}

// Pop the first element
})
}

// Display the linked list
fn display(&self) {
while let Some(node) = current {
}
println!("None");
}
}

// Implement Drop Trait to Avoid Stack Overflow
fn drop(&mut self) {
while let Some(mut boxed_node) = link {
}
}
}

// Testing the implementation
fn main() {
let mut list = LinkedList::new();

println!("Linked List after push operations:");

}
```

---

### **📌 How Push & Pop Work in a Linked List?**

✅ **`push()`** Method:

- Creates a **new node**.
- Stores the current head in **next**.
- Updates the list head to the new node.

✅ **`pop()`** Method:

- Removes the current **head node**.
- Updates the list head to the **next node**.
- Returns the removed node’s **data**.

---

### **📌 Implementing the Drop Trait to Avoid Stack Overflow**

If a linked list is large, a **recursive drop** could lead to **stack overflow** when the compiler automatically drops each node recursively. To prevent this, we manually implement an **iterative drop method**:

✔ **Why?**
- **Recursive Drop (Default)**: Drops nodes recursively, which can cause a **stack overflow** in large lists.
- **Iterative Drop (Custom Implementation)**: Drops nodes one by one in a loop, preventing excessive recursion.

✅ **How It Works?**
- `take()` is used to move ownership and prevent borrowing conflicts.
- The `while let Some(mut node) = link` loop iterates over all nodes, dropping them one by one.
- This ensures that we do **not** recursively drop nodes, preventing stack overflows.
Upcoming Rust Tutorials:**
Next Topics:
✅ Doubly Linked List Implementation**\
✅ Stacks & Queues using Linked Lists**\
✅ Binary Trees & Graphs in Rust**\
✅ HashMaps & Searching Algorithms in Rust**

Why Learn Data Structures in Rust?**

🚀 **Efficient Memory Management
🚀 **No Garbage Collector, Faster Execution
🚀 **Safe Concurrency & Parallelism**

---

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