Get Programming with JavaScript

Get Programming with JavaScript - Listing 5.10

Listing 5.10 - Displaying a player's health via object properties

var player1;
var player2;
var showPlayerHealth;

showPlayerHealth = function (playerName, playerHealth) {
    console.log(playerName + " has health " + playerHealth);
};

player1 = {
    name: "Kandra",
    place: "The Dungeon of Doom",
    health: 50
};

player2 = {
    name: "Dax",
    place: "The Old Library",
    health: 40
};

showPlayerHealth(player1.name, player1.health);
showPlayerHealth(player2.name, player2.health);

Further Adventures

Listing 5.10 - Displaying a player's health via object properties - Task 1

Add a new property to the player objects called healthMultiplier.

var player1;
var player2;
var showPlayerHealth;

showPlayerHealth = function (playerName, playerHealth) {
    console.log(playerName + " has health " + playerHealth);
};

player1 = {
    name: "Kandra",
    place: "The Dungeon of Doom",
    health: 50,
    healthMultiplier: 2
};

player2 = {
    name: "Dax",
    place: "The Old Library",
    health: 40,
    healthMultiplier: 0.5
};

showPlayerHealth(player1.name, player1.health);
showPlayerHealth(player2.name, player2.health);

Listing 5.10 - Displaying a player's health via object properties - Task 2

Add a third parameter to the definition of the showPlayerHealth function called playerHealthMultiplier.

var player1;
var player2;
var showPlayerHealth;

showPlayerHealth = function (playerName, playerHealth, playerHealthMultiplier) {    // Include a third parameter
    console.log(playerName + " has health " + playerHealth);
};

player1 = {
    name: "Kandra",
    place: "The Dungeon of Doom",
    health: 50,
    healthMultiplier: 2
};

player2 = {
    name: "Dax",
    place: "The Old Library",
    health: 40,
    healthMultiplier: 0.5
};

showPlayerHealth(player1.name, player1.health);
showPlayerHealth(player2.name, player2.health);

Listing 5.10 - Displaying a player's health via object properties - Tasks 3 & 4

Update the function so that the health displayed is first multiplied by the health multiplier.
Add the player's healthMultiplier property as a third argument to the two calls to the showPlayerHealth function.

var player1;
var player2;
var showPlayerHealth;

showPlayerHealth = function (playerName, playerHealth, playerHealthMultiplier) {
    console.log(playerName + " has health " + playerHealth * playerHealthMultiplier);    // Multiply
};

player1 = {
    name: "Kandra",
    place: "The Dungeon of Doom",
    health: 50,
    healthMultiplier: 2
};

player2 = {
    name: "Dax",
    place: "The Old Library",
    health: 40,
    healthMultiplier: 0.5
};

showPlayerHealth(player1.name, player1.health, player1.healthMultiplier);    // Include the extra argument
showPlayerHealth(player2.name, player2.health, player2.healthMultiplier);    // to match the extra parameter