rockpaperscissors.js

////////////////////////////////////////////////
/*   Provided Code - Please Don't Edit   */
////////////////////////////////////////////////
'use strict';

function getInput() {
    console.log("Please choose either 'rock', 'paper', or 'scissors'.")
    return prompt();
}
function randomPlay() {
    var randomNumber = Math.random();
    if (randomNumber < 0.33) {
        return "rock";
    } else if (randomNumber < 0.66) {
        return "paper";
    } else {
        return "scissors";
    }
}
////////////////////////////////////////////////
/*           Write Your Code Below            */
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function getPlayerMove(move) {
    // Write an expression that operates on a variable called `move`
    // If a `move` has a value, your expression should evaluate to that value.
    // However, if `move` is not specified / is null, your expression should equal `getInput()`.

    return move || getInput();
}

function getComputerMove(move) {
    // Write an expression that operates on a variable called `move`
    // If a `move` has a value, your expression should evaluate to that value.
    // However, if `move` is not specified / is null, your expression should equal `randomPlay()`.

    return move || randomPlay();
}

function getWinner(playerMove,computerMove) {
    var winner;
    // Write code that will set winner to either 'player', 'computer', or 'tie' based on the values of playerMove and computerMove.
    // Assume that the only values playerMove and computerMove can have are 'rock', 'paper', and 'scissors'.
    // The rules of the game are that 'rock' beats 'scissors', 'scissors' beats 'paper', and 'paper' beats 'rock'.
    
    switch (playerMove) {
        case "rock":
            if (computerMove == "scissors") {
                winner = "player";
            }
            else if (computerMove == "paper") {
                winner = "computer";
            }
            else {
                winner = "tie";
            }
            break;

        case "paper":
            if (computerMove == "rock") {
                winner = "player";
            }
            else if (computerMove == "scissors") {
                winner = "computer";
            }
            else {
                winner = "tie";
            }
            break;

        case "scissors":
            if (computerMove == "rock") {
                winner = "computer";
            }
            else if (computerMove == "paper") {
                winner = "player";
            }
            else {
                winner = "tie";
            }
            break;

        default:
            winner = "tie";
    }

    return winner;
}

function playToFive() {
    console.log("Let's play Rock, Paper, Scissors");
    var playerWins = 0;
    var computerWins = 0;
    // Write code that plays 'Rock, Paper, Scissors' until either the player or the computer has won five times.
    // This function should continue to play Rock Paper Scissors until either the
    // player or the computer has won five times.
    // After each 'round', display some text in the console indicating who played
    // what, who won, and what the current scoreboard looks like.
    // For example,
    //  console.log('Player chose ' + playerMove + ' while Computer chose ' + computerMove);
    //  console.log('The score is currently ' + playerWins + ' to ' + computerWins + '\n');

    var playerMove = "";
    var computerMove = "";
    var winner = "";

    while (playerWins < 5 || computerWins < 5) {
        playerMove = getPlayerMove(getInput());
        computerMove = getComputerMove(randomPlay());
        winner = getWinner(playerMove, computerMove);

        if (winner == "player") {
            playerWins++;
        }

        else if (winner == "computer") {
            computerWins++;
        }

        console.log("Player chose " + playerMove);
        console.log("Computer chose " + computerMove);
        console.log('The score is currently ' + playerWins + ' to ' + computerWins + '\n');
    }

    return [playerWins, computerWins];
}