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iterator design pattern

Deepika Sahu answered on December 29, 2022 Popularity 10/10 Helpfulness 1/10

answer iterator design pattern

related iterator design pattern

iterator design pattern

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import java.util.Iterator;

public class Demo {
    public static void main(String[] args) {
        Product p1 = new Product("tooth paste", 15);
        Product p2 = new Product("pen", 30);
        Product p3 = new Product("bottle", 20)

        Cart cart = new Cart();
        cart.addProduct(p1);
        cart.addProduct(p2);
        cart.addProduct(p3);

        System.out.println("Displaying Cart:");
        //Printing the cart items
        Iterator<Product> iterator = cart.iterator();
        //using while loop to iterate
        while (iterator.hasNext()) {
            Product product = iterator.next();
            //printing the product
            System.out.println(product);
        }

        System.out.println("\nRemoving last product returned");
        iterator.remove();

        System.out.println("\nDisplaying Cart:");
        iterator = cart.iterator();
        while (iterator.hasNext()) {
            Product product = iterator.next();
            System.out.println(product);
        }
    }
}

Popularity 10/10 Helpfulness 1/10 Language java

Source: www.scaler.com

Tags: iterator java

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Contributed on Dec 29 2022

Deepika Sahu

0 Answers Avg Quality 2/10

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iterator design pattern

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4. Iterator Pattern:
The Iterator pattern provides a way to access elements of an aggregate object sequentially without exposing its underlying representation.

Example in React:
Suppose you have a list of items in your React application, and you want to create an iterator to iterate over them.


import React, { useState } from 'react';

const IteratorPatternExample = () => {
 const items = ['Item 1', 'Item 2', 'Item 3'];
 const [currentIndex, setCurrentIndex] = useState(0);

 const nextItem = () => {
  if (currentIndex < items.length - 1) {
   setCurrentIndex(currentIndex + 1);
  }
 };

 const previousItem = () => {
  if (currentIndex > 0) {
   setCurrentIndex(currentIndex - 1);
  }
 };

 return (
  <div>
   <p>Current Item: {items[currentIndex]}</p>
   <button onClick={previousItem}>Previous</button>
   <button onClick={nextItem}>Next</button>
  </div>
 );
};

export default IteratorPatternExample;
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Popularity 9/10 Helpfulness 1/10 Language javascript

Source: Grepper

Tags: iterator iterato

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Contributed on Sep 13 2023

Amjad Saeed

0 Answers Avg Quality 2/10

iterator design pattern

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