Get Programming with JavaScript

Get Programming with JavaScript - Listing 4.14

Listing 4.14 - A function to display player information

var player1;
var player2;
var player;
var showPlayerInfo;

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

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

showPlayerInfo = function () {
    console.log(player.name);
    console.log("------------------------------");
    console.log(player.name + " is in " + player.place);
    console.log(player.name + " has health " + player.health);
    console.log("------------------------------");
    console.log("");
};

player = player1;
showPlayerInfo();

player = player2;
showPlayerInfo();

Further Adventures

Listing 4.14 - A function to display player information - Task 1

Write a function that just shows where the player is.

var player1;
var player2;
var player;
var showPlayerInfo;
var showPlayerPlace;    // Declare a variable

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

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

// Define a new function
// Assign it to a variable
showPlayerPlace = function () {
    console.log(player.name + " is in " + player.place);
};

showPlayerInfo = function () {
    console.log(player.name);
    console.log("------------------------------");
    console.log(player.name + " is in " + player.place);
    console.log(player.name + " has health " + player.health);
    console.log("------------------------------");
    console.log("");
};

player = player1;
showPlayerInfo();

player = player2;
showPlayerInfo();

Listing 4.14 - A function to display player information - Task 2

Write a function that just shows the player's health.

var player1;
var player2;
var player;
var showPlayerInfo;
var showPlayerPlace;
var showPlayerHealth;    // Declare a variable

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

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

showPlayerPlace = function () {
    console.log(player.name + " is in " + player.place);
};

// Define a new function
// Assign it to a variable
showPlayerHealth = function () {
    console.log(player.name + " has health " + player.health);
};

showPlayerInfo = function () {
    console.log(player.name);
    console.log("------------------------------");
    console.log(player.name + " is in " + player.place);
    console.log(player.name + " has health " + player.health);
    console.log("------------------------------");
    console.log("");
};

player = player1;
showPlayerInfo();

player = player2;
showPlayerInfo();

Listing 4.14 - A function to display player information - Task 3

Change the showPlayerInfo function to use your two functions.

var player1;
var player2;
var player;
var showPlayerInfo;
var showPlayerPlace;
var showPlayerHealth;

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

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

showPlayerPlace = function () {
    console.log(player.name + " is in " + player.place);
};

showPlayerHealth = function () {
    console.log(player.name + " has health " + player.health);
};

// Use the two new functions
showPlayerInfo = function () {
    console.log(player.name);
    console.log("------------------------------");
    showPlayerPlace();
    showPlayerHealth();
    console.log("------------------------------");
    console.log("");
};

player = player1;
showPlayerInfo();

player = player2;
showPlayerInfo();