| TECH |
Engadget Japanese |
2015年5月16日、手頃な価格で高性能なSIMフリー機「ZenFone 2」が発売されました：今日は何の日？ |
https://japanese.engadget.com/today-203006264.html
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zenfone |
2021-05-15 20:30:06 |
| js |
JavaScriptタグが付けられた新着投稿 - Qiita |
【JavaScript 変数】var、let、constの違いや使い分けなど |
https://qiita.com/ryohakosako/items/88fa33d45f165bf36a2b
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varは関数スコープ、letやconstやはブロックスコープの範囲で変数の値が適用されます。 |
2021-05-16 05:34:22 |
| Ruby |
Rubyタグが付けられた新着投稿 - Qiita |
RSpec(model)の読みやすい書き方 |
https://qiita.com/y1220/items/f04167d39f464cbb910d
|
RSpecmodelの読みやすい書き方Rubyでテストを書くにあたってuserモデル今回はこちらのメソッドへのテストの書き方についてuserrbclassUserdeffullnamenamesurnamejoinifmiddlenamenilnamemiddlenamesurnamejoinifmiddlenamenilendenduserモデルRspecuserの名前が定義されている状況に応じて異なるフルネームを返す。 |
2021-05-16 05:29:57 |
| 海外TECH |
DEV Community |
Observer Pattern |
https://dev.to/mwrpwr/observer-pattern-21c6
|
Observer PatternOne of my most commonly used design patterns is the Observer Pattern and for good reasons At its core it allows you to program easier and worry less about how objects will get updated For example when programming using the MVC framework you often want the views to be notified when the model s state changes React uses this same pattern under the hood to update components when the state changes React hooks are also another cool way to use the pattern With it being used so frequently in multiple programming languages frameworks I thought it would be beneficial to do a quick recap of what the pattern is and how it works “Observer Pattern Intent ー Define a one to many dependency between objects so that when one object changes state all its dependents are notified and updated automatically ー Design Patterns Elements of Reusable Object Oriented SoftwareSource Software Stack ExchangeWhy is the Observer Pattern Important This pattern is critical to building robust applications because it decouples the implementation of the Subject from the Observer This is pivotal because without this you could have a huge dependency tree that would often have to violate encapsulation The benefit in the future is that you can reuse the subjects without having to reuse the observers and vice versa You can also add observers without having to modify the subject or mess with any of the other observers This plug and play attribute is highly desirable when trying to build production applications ImplementationLet s walk through a quick example of how to practically use the Observer pattern in c This is most commonly done by handling and raising events Net events follow the delegate model and it enables an Observer to register and receive notifications from a Subject when an event is fired Let s walk through an example of a Clock Suppose you wanted to build a Clock app with some Alarm functionality You could implement a Clock cs that handles when the alarm time is reached The benefit to this is that in your main program you can simply specify the time you want the alarm to go off and then wait for the event to be raised Notice that after the event is raised in OnAlarmRaised I unsubscribe from the event This is considered a good practice as you never know when events could be fired and forgetting to unsubscribe could lead to memory leaks I realize that this example deviates from the typical example of the observer pattern but it goes to show that the pattern isn t always one for one with the book definition I think that the example I showed is a cleaner example that requires less code overall ConclusionThe observer pattern might be confusing the first couple of times you set out to use it but will provide great advantages down the road Give it a try in your next project Follow me on Twitter or DEV for more posts like this one |
2021-05-15 20:04:15 |
| Apple |
AppleInsider - Frontpage News |
Apple's push for 3D will require voxel map of the world claims VR evangelist |
https://appleinsider.com/articles/21/05/15/apples-push-for-3d-will-require-voxel-map-of-the-world-claims-vr-evangelist?utm_medium=rss
|
Apple x s push for D will require voxel map of the world claims VR evangelistApple is preparing for another paradigm shift that embraces D according to VR and AR evangelist Robert Scoble with predictions that Apple s strategy involves creating a realtime D map of the entire planet as well as more work on D audio and a headset like the often rumored Apple Glass Apple is thought to be working on Apple Glass wearable augmented reality or smart glasses that can provide users with a mix of digitally produced and real world views While the bulk of rumors and speculation have revolved around the hardware Robert Scoble has forecast the kind of user experience to expect from Apple over the coming years Starting at WWDC Apple will start to make announcements throughout the year about technological advances that it will be incorporating into its products writes Scoble on Saturday The announcements will apparently lead into many new products services and experiences that will come for decades Read more |
2021-05-15 20:59:56 |
| 海外TECH |
Engadget |
Android 12 might include big changes to notifications and widgets |
https://www.engadget.com/android-12-ui-leak-202831006.html
|
approaches |
2021-05-15 20:28:31 |
| ニュース |
BBC News - Home |
Chelsea 0-1 Leicester: Foxes lift FA Cup for first time after Youri Tielemans stunner |
https://www.bbc.co.uk/sport/football/57055571
|
Chelsea Leicester Foxes lift FA Cup for first time after Youri Tielemans stunnerLeicester City lift the FA Cup for the first time as Youri Tielemans stunning long range goal earns victory over Chelsea at Wembley |
2021-05-15 20:29:22 |
| ニュース |
BBC News - Home |
Santander services recovering after problems accessing online accounts |
https://www.bbc.co.uk/news/uk-57127774
|
problems |
2021-05-15 20:17:09 |
| ニュース |
BBC News - Home |
Andy Murray chooses to miss French Open |
https://www.bbc.co.uk/sport/tennis/57130124
|
court |
2021-05-15 20:03:16 |
| ビジネス |
ダイヤモンド・オンライン - 新着記事 |
なないろ生命社長が力説、「最後発」でも激戦市場で勝ち抜けるこれだけの理由 - 保険の裏 営業の闇 |
https://diamond.jp/articles/-/270317
|
乗り合い |
2021-05-16 05:25:00 |
| ビジネス |
ダイヤモンド・オンライン - 新着記事 |
東京エレクトロン、レーザーテック…絶好調の半導体製造装置メーカーの死角はあるか［見逃し配信］ - 見逃し配信 |
https://diamond.jp/articles/-/270721
|
今中能夫 |
2021-05-16 05:20:00 |
| ビジネス |
ダイヤモンド・オンライン - 新着記事 |
葛飾北斎「初」の伝記映画を見て納得、西洋画から日本アニメにまで与えた影響力 - ビジネスを強くする教養 |
https://diamond.jp/articles/-/271118
|
hokusai |
2021-05-16 05:15:00 |
| ビジネス |
ダイヤモンド・オンライン - 新着記事 |
損保ジャパン社長に聞く、国会で受けた「代理店切り捨て批判」への持論 - 保険の裏 営業の闇 |
https://diamond.jp/articles/-/270316
|
切り捨て |
2021-05-16 05:10:00 |
| ビジネス |
ダイヤモンド・オンライン - 新着記事 |
超絶カワイイ野生のアシカと泳げる！西オーストラリアの注目エリア - 地球の歩き方ニュース＆レポート |
https://diamond.jp/articles/-/270594
|
そんなオーストラリアで「世界一幸せな動物」と言われるクォッカが生息していることで大人気となっているのが西オーストラリア州です。 |
2021-05-16 05:05:00 |
| LifeHuck |
ライフハッカー［日本版］ |
家使いにも。「中を仕切れるソフトコンテナ」でアウトドアギアをすっきり収納 |
https://www.lifehacker.jp/2021/05/234702roomie-albatore-softcontainer.html
|
albatre |
2021-05-16 06:00:00 |
| ビジネス |
東洋経済オンライン |
リモコン激変！｢ボタン争奪戦｣が熾烈極める理由 Netflix追う日本勢､テレビメーカーも前のめり | メディア業界 | 東洋経済オンライン |
https://toyokeizai.net/articles/-/428112?utm_source=rss&utm_medium=http&utm_campaign=link_back
|
netflix |
2021-05-16 05:30:00 |
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