June 2022
Beginner to intermediate
672 pages
17h 23m
Japanese
Content preview from Head Firstデザインパターン 第2版 ―頭とからだで覚えるデザインパターンの基本
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気象観測所を設計する
<<interface>>
Subject
registerObserver()
removeObserver()
notifyObservers()
<<interface>>
Observer
update()
registerObserver()
removeObserver()
notifyObservers()
getTemperature()
getHumidity()
getPressure()
measurementsChanged()
WeatherData
update()
display() {
//
現在の測定値を表示
}
CurrentConditionsDisplay
update()
display() {
//
測定値の平均、最低、
//
最高値を表示
}
StatisticsDisplay
update()
display() {
//
予報を表示
}
ForecastDisplay
サブジェクトインタフェースです。
見覚えがあるでしょう？
すべての気象要素は
Observer
イ
ンタフェースを実装します。これ
は、
Subject
がオブザーバを更
新する際に、オブザーバとやり
取りする共通インタフェースを
Subject
に提供します。
この表示要素は
WeatherData
オブジェ
クトからの現在の測定値
を表示します。
最低
/
平均
/
最高値の記録
と表示を行います。
この表示要素は気圧を基に気象予報を
表示します。
ここでは
WeatherData
は
Subject
インタフェー
スを実装します。
オブザーバ
update() ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
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.