JavaScript - Bringing it All Together: Building an app(array of objects, indexing, Model(MVC))

Head First JavaScript Programming
( O'Reilly Media)
Eric T. Freeman (著), Elisabeth Robson (著)

開発環境

• OS X Mavericks - Apple(OS)
• Safari, Firefox + Firebug, Google Chrome(Webプラウザ、プラグイン)
• BBEdit - Bare Bones Software, Inc. (GUI) , Emacs (CUI) (Text Editor)
• JavaScript (プログラミング言語)

Head First JavaScript Programming (Eric T. Freeman (著)、 Elisabeth Robson (著)、 O'Reilly Media )のChapter 8(Bringing it All Together: Building an app)、SHARPEN YOUR PENCIL(p.340)を解いてみる。

SHARPEN YOUR PENCIL(p.340)

• ship2, ship3
• C4, A0
• yes
• ship2
• no

コード(BBEdit, Emacs)

var ships = [{locations: ["31", "41", "51"], hits: ["", "", ""] },
             {locations: ["14", "24", "34"], hits: ["", "hit", ""] },
             {locations: ["00", "01", "02"], hits: ["hit", "", ""] }],
    ship1 = ships[0],
    ship2 = ships[1],
    ship3 = ships[2],
    locations,
    hits;

locations = ship2.locations;
print('Location is ' + locations[1]); // 24

hits = ship3.hits;
if (hits[0] === 'hit') {
    print('Ouch, hit on third ship at location one');
}

hits = ship1.hits;
hits[2] = 'hits';
print(hits);