
Data Structure

This illustrates a data structure, a means of storing data within a program.

You may see other such structures in the Data Structures category.
 Illustration of FIFO behavior
Task

Create a queue data structure and demonstrate its operations.

(For implementations of queues, see the FIFO task.)



Operations:

   push       (aka enqueue) - add element
   pop         (aka dequeue) - pop first element
   empty     - return truth value when empty


See also

 Array
 Associative array: Creation, Iteration
 Collections
 Compound data type
 Doubly-linked list: Definition, Element definition, Element insertion, List Traversal, Element Removal
 Linked list
 Queue: Definition, Usage
 Set
 Singly-linked list: Element definition, Element insertion, List Traversal, Element Removal
 Stack


use std::collections::VecDeque;
 
fn main() {
    let mut queue = VecDeque::new();
    queue.push_back("Hello");
    queue.push_back("World");
    while let Some(item) = queue.pop_front() {
        println!("{}", item);
    }
 
    if queue.is_empty() {
        println!("Yes, it is empty!");
    }
}
 