Pengenalan Linked List - struktur Data (Animasi)

Summary

This video explains the concept of linked lists in programming, covering their structure and how they differ from arrays. It discusses how linked lists store data in nodes connected by pointers, with types like singly and doubly linked lists. The video also explains how to insert data into a linked list—at the beginning, middle, or end—through pointer manipulation. Additionally, it highlights the advantages of linked lists over arrays, especially for efficient insertion. The tutorial concludes by emphasizing when to use linked lists in real-world applications, depending on specific needs and use cases.

Takeaways

• 😀 Linguistics refers to a collection of linear data structures, often connected by nodes or links, forming a linked list.
• 😀 A linked list is different from an array in that it doesn't store data sequentially, but through pointers that link data together.
• 😀 Arrays are ordered with indices, while linked lists are connected through memory addresses, creating a chain-like structure.
• 😀 Linked lists can be single (with one pointer to the next data) or doubly linked (with pointers in both directions).
• 😀 Computer memory can be thought of as a series of blocks, where each block is a ‘house’ that stores data at a specific address.
• 😀 When adding data to a linked list, it's connected to the next node through a pointer called 'next'.
• 😀 There are three main ways to insert data into a linked list: at the beginning (insertion at the head), in the middle, and at the end.
• 😀 To insert data at the head, the new data points to the previous first element, which then points to the next node.
• 😀 To insert data in the middle, traverse from the head until the desired position is reached, and then link the new data between the previous and next nodes.
• 😀 To insert data at the end, traverse through the entire list until reaching the last node, then update its 'next' pointer to the new data.
• 😀 Linked lists offer flexibility and efficiency in cases where frequent insertions and deletions are required, compared to arrays.

Q & A

What is a linked list in computer science?

A linked list is a linear collection of connected data storage units called nodes. Each node points to the next node in the sequence, forming a chain of data that is connected in a linear fashion.

How does a linked list differ from an array?

An array stores data contiguously in memory and allows direct access using indices. In contrast, a linked list stores data in non-contiguous memory locations, and each node contains a reference (or pointer) to the next node in the list.

What are the advantages of using a linked list over an array?

Linked lists are dynamic and flexible, allowing for easy insertion and removal of elements without the need to shift other data. They are better suited for situations where the size of the data changes frequently.

What are the disadvantages of using a linked list compared to an array?

Linked lists use more memory due to the storage of pointers alongside data. Accessing elements in a linked list is slower because you must traverse the list from the head to the desired node, unlike arrays which allow direct access via indices.

What is meant by 'head' and 'tail' in a linked list?

The 'head' is the first node in the linked list, while the 'tail' is the last node. The tail node’s next pointer is typically set to null, indicating the end of the list.

How are data nodes inserted into a linked list?

Data can be inserted into a linked list at the beginning (head), middle, or end (tail). Insertion at each position involves adjusting pointers to maintain the correct sequence of nodes.

What steps are involved in inserting a node at the beginning of a linked list?

To insert at the beginning, the new node is created, and its pointer is set to the current head node. Then, the head of the list is updated to point to the new node.

How is a node inserted into the middle of a linked list?

Inserting a node in the middle requires traversing the list to find the appropriate position. Once the position is found, the next pointer of the previous node is updated to point to the new node, and the new node’s next pointer is set to the next node.

How is a node inserted at the end of a linked list?

To insert at the end, the list is traversed from the head to the last node. The last node’s next pointer (which is null) is updated to point to the new node, making the new node the new tail.

Why might linked lists be preferred over arrays in certain use cases?

Linked lists are ideal for situations where data size is constantly changing, such as in dynamic memory allocation, where the ability to easily insert or delete elements is required. Arrays, while fast for access, require resizing and shifting of elements when changes occur.