Shuffling the Deck: A JavaScript Card Game Example

Building the Deck

To create a standard deck of 52 cards, we need to define two arrays: suits and values. The suits array contains the four suit names, while the values array holds the 13 card values.

const suits = ['Hearts', 'Diamonds', 'Clubs', 'Spades'];
const values = ['Ace', '2', '3', '4', '5', '6', '7', '8', '9', '10', 'Jack', 'Queen', 'King'];

Creating the Deck Array

We use a nested for loop to iterate over each suit and value, creating an object for each card combination. The resulting deck array contains 52 objects, each with a Value and Suit property.

let deck = [];

for (let suit of suits) {
  for (let value of values) {
    deck.push({ Value: value, Suit: suit });
  }
}

For example, one object in the deck array might look like this: { Value: "Ace", Suit: "Spades" }.

Shuffling the Deck

To randomize the deck, we employ a second for loop that leverages the Math.random() and Math.floor() functions. This generates a random number between 0 and 51, allowing us to swap two card positions. By repeating this process, we effectively shuffle the deck.

for (let i = deck.length - 1; i > 0; i--) {
  let j = Math.floor(Math.random() * (i + 1));
  [deck[i], deck[j]] = [deck[j], deck[i]];
}

Dealing the Cards

Finally, a third for loop is used to display the first five cards in the newly shuffled deck. This provides a glimpse into the randomly ordered deck, showcasing the program’s effectiveness.

for (let i = 0; i < 5; i++) {
  console.log(`Card ${i + 1}: ${deck[i].Value} of ${deck[i].Suit}`);
}

This example demonstrates a fundamental understanding of JavaScript arrays, loops, and object manipulation. By combining these concepts, we’ve created a functional deck of cards that can be shuffled and dealt – a testament to the power of programming.

• Arrays: We used arrays to represent the suits, values, and deck of cards.
• Loops: We employed nested for loops to create the deck array and shuffle the deck.
• Object manipulation: We created objects for each card combination and manipulated them to shuffle the deck.