get-card-value.js

// This problem involves playing cards: https://en.wikipedia.org/wiki/Standard_52-card_deck

// You will need to implement a function getCardValue

// You need to write assertions for your function to check it works in different cases

// Acceptance criteria:

// Given a card string in the format "A♠" (representing a card in blackjack),
// When the function getCardValue is called with this card string as input,
// Then it should return the numerical card value

// Handle Number Cards (2-10):
// Given a card with a rank between "2" and "10",
// When the function is called with such a card,
// Then it should return the numeric value corresponding to the rank (e.g., "5" should return 5).

// Handle Face Cards (J, Q, K):
// Given a card with a rank of "J," "Q," or "K",
// When the function is called with such a card,
// Then it should return the value 10, as these cards are worth 10 points each in blackjack.

// Handle Ace (A):
// Given a card with a rank of "A",
// When the function is called with an Ace,
// Then it should, by default, assume the Ace is worth 11 points, which is a common rule in blackjack.

// Handle Invalid Cards:
// Given a card with an invalid rank (neither a number nor a recognized face card),
// When the function is called with such a card,
// Then it should throw an error indicating "Invalid card rank."
 function getCardValue(card){
    const rank = card.slice(0,-1)
    if (rank >=2 && rank<= 10){
        return parseInt(rank);
    }
    if (["j" ,"Q","R"].includes(rank)){
        return 10;
    }
    if (rank =="A"){
        return 11;
    }
    else {
        return "invalid card rank"
    }
 }
  console.log("getCardValue()");