February 2014
Intermediate to advanced
372 pages
7h
Japanese
Content preview from Backbone.jsアプリケーション開発ガイド
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144
6
章 拡張機能
アプリケーションを開始するために、初期化用コードの中でアプリケーションオブジェクトの
start
を呼び出します。このためのコードは以下のとおりです。
$(function() {
// TodoMVC
アプリケーション（
js/TodoMVC.js
で定義）を開始します
TodoMVC.start();
});
これで完成です。
6.1.6
MarionetteJS
化によってアプリケーションの保守は容易になるか
保守の容易さはモジュール性につながると
Derick
は考えています。ここではパターンを適用す
ることによって、責任が分離（
SRP
または関心の分離とも言えます）されます。しかし、分離が容
易ではないこともあります。分離や抽象化、概念の細分化といった事柄自体が目的になってはいけ
ません。
SRP
が唱えているのはまったく逆であり、物事の変化のコンテキストを理解するよう説いてい
ます。例えばあるシステムの中で、常に連動して変化している部分や独立に変化している部分を探
すことが求められます。このような知識がないと、どの部分を分離してどこを一体のまま保つべき
なのか判断できません。
Derick
がアプリケーションをモジュール化する際には、それぞれのレベルで概念を分解すると
いうアプローチをとっています。高レベルでのモジュールは、高レベルでの関心事すなわち集合的
な責任に対応します。そしてそれぞれの責任は分解されて
API
として表現され、下位のモジュール
で実装されます（これは依存関係逆転の原則という名で知られています） ...
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.