Mastery Points
0
Queue Implementation in dsa
Context & Logic
A custom queue implementation following the FIFO principle. Efficient implementation often uses an object or linked list to avoid O(n) shifts.
Example
class Queue {
constructor() { this.items = {}; this.head = 0; this.tail = 0; }
enqueue(item) { this.items[this.tail++] = item; }
dequeue() {
const item = this.items[this.head];
delete this.items[this.head++];
return item;
}
}Step-by-Step Logic
1
Maintain pointers for front (head) and rear (tail).
2
Enqueue: Add element at tail and increment tail.
3
Dequeue: Get element at head, increment head, and remove from storage.
Complexity Metrics
Time Efficiency
O(1) for enqueue and dequeue
Memory Footprint
O(n)