投稿時間:2021-08-21 16:27:21 RSSフィード2021-08-21 16:00 分まとめ(32件)

カテゴリー等	サイト名等	記事タイトル・トレンドワード等	リンクURL	頻出ワード・要約等/検索ボリューム	登録日
IT	気になる、記になる…	｢iPhone 13 Pro Max｣のものとみられる新たな図面が流出か − ノッチの幅は8.6㎜縮小か	https://taisy0.com/2021/08/21/144369.html	duanrui	2021-08-21 06:45:20
TECH	Engadget Japanese	手のひらサイズのスマートな灯り。モバイルバッテリーにもなる「piccolo（ピッコロ ）ランタン」	https://japanese.engadget.com/piccolo-lantern-061513242.html	モバイルバッテリーにもなる「piccoloピッコロランタン」イタリア語で「小さい」を意味する「ピッコロ」という名前の手のひらサイズの小さなLEDランタンがこの「ピッコロランタン」です。	2021-08-21 06:15:13
python	Pythonタグが付けられた新着投稿 - Qiita	[Python]Seleniumを用いたWebページスクリーンショット取得方法 メモ	https://qiita.com/KWS_0901/items/fe0669d4fdc75cb998f6	プロジェクト構成screenshotscreenshotpychromedriverexeimagesコードscreenshotpy実行時に指定したURLのWebページのスクリーンショットを取得する。	2021-08-21 15:27:17
python	Pythonタグが付けられた新着投稿 - Qiita	iPadでVSCodeとJupyter Notebookを使う環境を作る	https://qiita.com/mochi_yu2/items/860ea0abbc9101a90afa	参考ApacheModulemodproxywstunnel参考本記事の作成にあたり、以下の記事を参考にさせていただきました。	2021-08-21 15:15:38
python	Pythonタグが付けられた新着投稿 - Qiita	DirectCloud-BOXのAPI連携の肝とpythonモジュール作成	https://qiita.com/tentatsu/items/ce1cf272f26fbbb7de44	ここでなんと、APIリファレンスにAPIのドメインが記載されていません。	2021-08-21 15:05:02
js	JavaScriptタグが付けられた新着投稿 - Qiita	JavaScriptで役立つasync/awaitテンプレ（WebDevTips#2）	https://qiita.com/cocoa_folio/items/666d331d52aa9669d358	JavaScriptで役立つasyncawaitテンプレWebDevTipsこんにちはココアcocoafolioですこれまでは主にpythonに触れてきましたが最近Javascriptを勉強し始めたのでWebエンジニアを目指す方々へのtipsとして記事を書いていきたいと思います前回の記事はこちら前回に引き続き今回はasyncawaitについて説明していきますasyncawaitとはPromiseと一緒に用いられることの多いasyncawaitasyncとawaitって一体なんでしょうGoogleで「asyncawait」と調べてみるとasyncとは非同期関数ーAsyncFunctionオブジェクトである関数を定義します。	2021-08-21 15:58:24
js	JavaScriptタグが付けられた新着投稿 - Qiita	Vueでお絵かきアプリ作成2(canvas使用)	https://qiita.com/ryotaro_tech/items/4fb9b4d57d966a63092c	Vueでお絵かきアプリ作成canvas使用趣向vueでお絵かき機能を作成する機会があったため作ってみましたの続き前回のはこちらこのページではペン機能と消しゴム機能をわけ、ペンの太さと色を変更できるようにしたいと思います。	2021-08-21 15:15:09
js	JavaScriptタグが付けられた新着投稿 - Qiita	フロントエンドエンジニアのNode.js基礎学習〜	https://qiita.com/s_taro/items/a4205700025dc66883d5	今まではJSを中心にVueReactなどを学んでいたのですが、今回はサーバーサイドのJS実行環境であるNodejsを入り口にバックエンドを少しづつ学習していこうと思い、妥当な流れでNodejsを技術選定しました。	2021-08-21 15:05:05
js	JavaScriptタグが付けられた新着投稿 - Qiita	駆け出しプログラマ向け、実務で使える「簡潔性」ってなに？	https://qiita.com/Yohei_Shiina/items/c0c328e2b036e35163f5	簡単にまとめると短くてわかりやすい不要な説明なしに大事なことが表現できている状態やその質同じコードが繰り返されていないつまり無駄がないIT用語的な説明としては、同じ機能を実現するコードが繰り返されている所をサブルーチン化することで改善できるとあります。	2021-08-21 15:05:03
Program	[全てのタグ]の新着質問一覧｜teratail（テラテイル）	Unityの時間表示について	https://teratail.com/questions/355411?rss=all	Unityの時間表示についてUnityの時間表示について質問です。	2021-08-21 15:51:11
Program	[全てのタグ]の新着質問一覧｜teratail（テラテイル）	テキストを一文字ずつ表示しつつ句読点で表示を数秒中断させ、再開させたい	https://teratail.com/questions/355410?rss=all	また、ただ一文字ずつ表示するのではなく、読点や。	2021-08-21 15:51:04
Program	[全てのタグ]の新着質問一覧｜teratail（テラテイル）	PHPの正規表現について	https://teratail.com/questions/355409?rss=all	PHPの正規表現について前提・実現したいこと正規表現を使って文字列のマッチングの判定がしたいです。	2021-08-21 15:42:32
Program	[全てのタグ]の新着質問一覧｜teratail（テラテイル）	自作のモデルを利用してアノテーション作業を簡略化することはできますか？	https://teratail.com/questions/355408?rss=all	自作のモデルを利用してアノテーション作業を簡略化することはできますか前提・実現したいことYolovを使用して自作のモデルを作成しました。	2021-08-21 15:37:15
Program	[全てのタグ]の新着質問一覧｜teratail（テラテイル）	HTMLでページ上部の余白を消す方法	https://teratail.com/questions/355407?rss=all	HTMLでページ上部の余白を消す方法前提・実現したいことHTMLでWebページ上部のナビゲーションを作成しているのですが、以下のCSSのコードのようにページ全体のmarginやpaddingをpxに設定しているにも関わらずページ最上部に余白ができてしまいます。	2021-08-21 15:33:58
Program	[全てのタグ]の新着質問一覧｜teratail（テラテイル）	Systemd でサービス登録したが、プロセスには出てこない。	https://teratail.com/questions/355406?rss=all	Systemdでサービス登録したが、プロセスには出てこない。	2021-08-21 15:31:37
Program	[全てのタグ]の新着質問一覧｜teratail（テラテイル）	Chainerをimport出来ません。	https://teratail.com/questions/355405?rss=all	Chainerをimport出来ません。	2021-08-21 15:30:45
Program	[全てのタグ]の新着質問一覧｜teratail（テラテイル）	ubuntuでGoogleColabのローカルランタイム	https://teratail.com/questions/355404?rss=all	ubuntuでGoogleColabのローカルランタイムUbuntuでJupyternbspNotebookでGoogleClolabのローカルランタイムを実行しようとしていて、エラーが出てサーバーを立ち上げられません。	2021-08-21 15:26:32
Program	[全てのタグ]の新着質問一覧｜teratail（テラテイル）	Wordpressでテーマ変更をした際にエラーでログインできなくなりました	https://teratail.com/questions/355403?rss=all	Wordpressでテーマ変更をした際にエラーでログインできなくなりましたはじまして。	2021-08-21 15:20:37
Program	[全てのタグ]の新着質問一覧｜teratail（テラテイル）	C#からVB.NETへの変換(デザイナー)	https://teratail.com/questions/355402?rss=all	画像ファイルは残っていますが、ボタンやテキストボックスで作った絵の移動方法はありますでしょうか。	2021-08-21 15:18:19
Program	[全てのタグ]の新着質問一覧｜teratail（テラテイル）	Express res.json()で処理を終了する方法	https://teratail.com/questions/355401?rss=all	Expressresjsonで処理を終了する方法Expressnbspresjsonで処理を終了する方法Expressを用いて以下のようなコードを実装しました。	2021-08-21 15:09:17
Program	[全てのタグ]の新着質問一覧｜teratail（テラテイル）	SQLサブクエリで最新の投稿を取得	https://teratail.com/questions/355400?rss=all	SQLサブクエリで最新の投稿を取得お世話になっております。	2021-08-21 15:01:55
Ruby	Rubyタグが付けられた新着投稿 - Qiita	【postgresQL】起動と停止	https://qiita.com/mihooo24/items/4444492cda69cd012471	まとめとても基本的な内容かと思いますが、改めて復習することで整理できました。	2021-08-21 15:38:39
AWS	AWSタグが付けられた新着投稿 - Qiita	AWS SNSとSQSをメーリングリストとセンター問い合わせで例えてみる	https://qiita.com/NegishiYuya/items/67fec33e2cb31299c797	プロデューサー送信側がSQSに対してメッセージを送るSQSがメッセージをキューとして蓄えるコンシューマー受信側がSQSに対してメッセージがたまっていないかを確認し、メッセージがあれば受信する送ったメッセージは即時では相手には届かず、受け取り側が自ら取りに行くというという仕組みです。	2021-08-21 15:02:10
Docker	dockerタグが付けられた新着投稿 - Qiita	iPadでVSCodeとJupyter Notebookを使う環境を作る	https://qiita.com/mochi_yu2/items/860ea0abbc9101a90afa	参考ApacheModulemodproxywstunnel参考本記事の作成にあたり、以下の記事を参考にさせていただきました。	2021-08-21 15:15:38
Docker	dockerタグが付けられた新着投稿 - Qiita	【docker】コンテナの hosts と resolv.conf を変更する	https://qiita.com/kiyo27/items/6d6234d3a9abb0db2cd1	【docker】コンテナのhostsとresolvconfを変更するdockerコンテナのhostsとresolvconfを調査することがあったので、その際に使用したコマンドとオプションをまとめておきます。	2021-08-21 15:03:02
Ruby	Railsタグが付けられた新着投稿 - Qiita	【postgresQL】起動と停止	https://qiita.com/mihooo24/items/4444492cda69cd012471	まとめとても基本的な内容かと思いますが、改めて復習することで整理できました。	2021-08-21 15:38:39
海外TECH	DEV Community	Best description on Encapsulation, Inheritance, Polymorphism of Java Language (3 main features of OOP L）	https://dev.to/devide_r_conquer/3-main-characteristics-of-java-oop-language-class-2237	Best description on Encapsulation Inheritance Polymorphism of Java Language main features of OOP L Three main features of OOP language PREFACE you can just skip this section to Introduction XD Okay Java and cpp are the language that I learn from my school though this summer I receive an email from my professor that we had better to have some expreience on C And I use fews week to be acquainted with this OMG And we know those two languages are Object Oriented Programming languages So they have three features that are different from Procedure Oriented Language like C so far I have learnt Due to these three features have a high occurrence rate on interviews from many comps I decide to summary my knowledge This blog is based on the language of JAVA and you should know there are still difference amoung all OOP languages And in this blog I will try to use my word and my thinking to describe what they are and why they exist how to use them Please correct me if there is any wrong in my blog Thank you IntroductionEncapsulationInheritancePolymorphism Encapsulation What Why How Defination What Put the objects which have same features or belongs to the same class together and pack them well So you know in the company there are lots of departments that led by different managers or supervisors For example we have IT Department class and HR Department class class HR Department private String Manager private String Dep Members HR Department String manager name constructor of HR Dep Manager manager name private void employ System out println Our company need to employ a new employee private void dismissal System out println We decide to dismissal someone class IT Department private String Manager private String Dep Members IT Department String manager name constructor of IT Dep Manager manager name private void Access Database System out println Our IT Department can access database of our company private void Power outage System out println IT Department decide to shut down the power for fixing problems class Google Inc private IT Department it Dep private HR Department hr Dep Google Inc String IT Manager Name String HR Manager Name constructor of Google Inc it Dep new IT Department IT Manager Name hr Dep new HR Department HR Manager Name System out println Google Inc is established successfully public class Test public static void main String args set up a company call newGoogle Inc XD Google Inc google Inc new Google Inc Jack Rose If you are CEO of this company you have to employ some managers to help you manage these different departments and of course you require any department work in perfect order and help each other Significance Why You can easily imagine that how messy this scenario would be if we didn t have access to every piece of data in any class I believe you can t stand it when HR employee turns off the power without checking in with THE IT department even I never work for any companys XD It s dangerous and out of line anywhere So the existance of Encapsulation shows its importance right now The example of company is also suitable for any program s code s data s management It s dangerous while after you design a program some of your users could access your data and edit them So for Java we usually pack our CLASS data well through using Permission Modifier public protected default private most used to modify class and variable as you can see on previous code block Obviously you can realize that if you correctly use the permission modifier you can realize the advantages of your code Isolate important variables vars or functions funcs Conveniently access vars or funcs Increase the importance Enhance the securityAnd of course these advantages also cause the code being much more harder to access and leading you spending more steps to access them Implement of Encapsulation HOW Before using them you need to know the range of different modified vars or funcs that could be accessed ModifySame classSame packageSub classAll classprivateYesdefaultYesYesYesprotectedYesYesYespublicYesYesYesYesIn some way protected equals to default Eg You can not access manager name of HR department directly by assign So you need to set up some functions called Getters and Setters class IT Department private String Manager private String Dep Members IT Department String manager name constructor of IT Dep Manager manager name String getManager a classic getter function return manager s name return Manager void setManager String name a classic setter function set name to manager s name this Manager name private void Access Database System out println Our IT Department can access database of our company private void Power outage System out println IT Department decide to shut down the power for fixing problems Hence you can realize the implement of encapsulation is abstract in code We prefer to call encapsulation a phenomenon or a feature If you have a clear and strict frame of code your codes will look so GOOD and COMFORTABLE In main function public static void main String args set up a company call newGoogle Inc Google Inc google Inc new Google Inc Jack Rose String name google Inc it Dep getManager assign Jack to name google Inc it Dep setManager Ben assign Ben to IT Department s manager Inheritance W W H Defination What Key word extendWhen multiple classes have common attributes member variables and behavior member methods these common parts are extracted and defined in a public class Other classes and classes can form an inheritance relationship with this public class so that there is no need to redefine the public part in multiple classes This common class is the parent class also known as the superclass or base class and the other classes are the subclasses Subclasses can access non private member variables of the parent class directly and private member variables of the parent class can be accessed using the super get method Now we have the codes at the following class Father String car Toyota String books Harry Potter class Son extends Father son extends from his father public class Test public static void main String args Father Howard Stark new Father Son Tony Stack new Son System out println Tony Stack car Seems like son has nothing However once the son extends from his father Tony now could drive the car from his father and read the books which his father confer to him public class Test public static void main String args Father Howard Stark new Father Son Tony Stack new Son System out println Tony Stack car output Toyota System out println Tony Stack books output Harry Potter Some features that you should pay attention about the Inheritance in Java Every sub class is prowerful than base class which means sub class would have or cover more vars and funcs than father class has Of course Iron man Tony is much more greater than his father Howard haha Even son extends from his father son could not change the feature of his father The reason why son could not change his father s feature is that father and son are two independent instances of class Son and class Father public class Test public static void main String args Father Howard Stark new Father Son Tony Stack new Son Tony Stack car Mercedes Tony changes his car to Mercedes but could not change Howard s car System out println Howard Stark car output Toyota System out println Tony Stack car output Mercedes Hence what Tony has in the future does not Howard s business including his Mark One and Mark Two That s why son class is absolutely greater than father class class Father String car Toyota String books Harry Potter class Son extends Father son extends from his father String suit Mark One String suit Mark Two Java is single inheritance not multiple inheritance unlike C However it is possible to build multi level subclasses of inheritance Like Tony extends from Howard Morgan Stark Tony s daughter extends from Tony but Morgan could not extend from Howard and Tony at the same time Tony Stark lt extends Howard StarkMorgan Stark lt extends Tony StarkMorgan Stark lt X Howard Stark Tony Stark Significance Why If a class want to get a same function from another class it can set up an inheritance Save your time to coding and increase the reusing rate of code Encapsulation and inheritance are the prerequisites for polymorphism implementation Of course when you edit the feature of father class the common features that the son has would be changed too unless the son change these common features independently Implementation How It is the best time to implement inheritance among classes When those classes have many properties in common When there are obviously relationship among those classes like class animals includes class dog and class cat so class cat and class dog extends the proteries from class animals After knowing when to use inheritance you can try to build up the relationship and have a rough frame in your mind I m going to talk about the six points of inheritance When construct an instance of sub class the complier will invoke the constructor of base class first and then invoke the constuctor of sub class class Father String car Toyota String books Harry Potter Father System out println Father s constructor invoked class Son extends Father son extends from his father String suit Mark One String suit Mark Two Son System out println Son s constructor invoked public class Test public static void main String args Son Tony Stack new Son Output Father s constructor invokedSon s constructor invoked class Object is the father class of any class in JAVA Hence every instance object in Java is the polymorphism of instance of class Object The constructor of a subclass runs super first regardless of whether it has arguments or how many super equals to default constructor of father class So you can either explicitly or implicitly call super in the any constructor of sub class class Father String car Toyota String books Harry Potter where the super is Father System out println Father s constructor invoked Father String car this car car class Son extends Father son extends from his father Son super default System out println Son s constructor invoked Son String book super default this books book Properties that are private to the parent class are not directly accessible to the subclass in test java even if the subclass inherits them You can specify the subclass s parameter constructor only by calling the parent s parameter constructor For properties that are not private to the parent class the child class object can invoke directly class Father String car Toyota String books Harry Potter private String bank account Father System out println Father s constructor invoked Father String car this car car class Son extends Father son extends from his father Son super default System out println Son s constructor invoked public class Test public static void main String args Son Tony Stack new Son Tony Stack bank account error reported bank account has private access in test Father Due to the limitation of the paragraph here are all my knowledge of Inheritance and there will be more features details in Polymorphism Section Polymorphism Finally I begin to write about POLYMORPHISM section This section needs me get much more familier with the core knowledge of Three Main Features Of Java Inheritance maybe not the most popular in code but the most important part of programming at least I think so XD What is Polymorphism Polymorphism is the implementation of an object having different manifestations For example pressing the same button ENTER in different applications computer will show up different reactions like acting Line Feed function in Word application acting Send function after you type the text in chat box etc Just like invoking the same function pressing ENTER button plays an different roles in different applications This is also kind of Polymorphism Significance of Polymorphism Remove coupling between classesReplaceabilityScalabilityWorking as interface like a real interface in Java FlexibilitySimplicityBefore describing all of its significance there are hree necessary conditions for the existence of polymorphisms that you should know The implementance of inheritance So you can see the implementance of polymorphsm is also the implementance of OverrideAn reference of father class points to an object of a sub class Parent p new Child Now we have classes in our program And we have codes for these class Shape void draw is overridden class Circle extends Shape void draw override function draw of class Shape System out println Circle draw class Square extends Shape void draw override function draw of class Shape System out println Square draw class Triangle extends Shape void draw override function draw of class Shape System out println Triangle draw When a method is called in polymorphic mode it is first checked to see if the method exists in the parent class If it does not a compile error occurs If so call the method of the same name in the subclass The phenomenon of calling a function in a subclass with the same name as the one of father class but showing different results is called Override The best way to demonstrate these advantages is to look at the following code abstract class Animal Abstraction abstract void eat class Cat extends Animal public void eat Interface System out println Eat fish public void work System out println Catch mouse class Dog extends Animal public void eat System out println Eat bone public void work System out println Guard public class Test public static void main String args show new Cat Invoke the show through the object of class Cat show new Dog Invoke the show through the object of class Cat Animal a new Cat Upcasting a eat Invoke eat of class Cat Cat c Cat a Downcasting c work Invoke work of class Cat public static void show Animal a a eat Judging the class type if a instanceof Cat What a cat does Cat c Cat a c work else if a instanceof Dog What a dog does Dog c Dog a c work And you can see the output Eat fish Catch mouse Eat bone Guard Eat fish Catch mouse How to implement Polymorphism Override Override exists for polymorphisms We ve already discussed method overrides which are methods that can be overridden by a sub class When a subclass object calls an overridden method the method in the subclass is called not the overridden method in the superclass To call an overridden method in a parent class you must use the super keyword InterfaceInterfaces in Java are similar to interfaces in life which are collections of method characteristics but no method implementation See the Java Interfaces section for details Abstract classes and abstract functions vitural function Virtual functions also exist for polymorphisms Of course the implementation of polymorphism is not only about the interation among classes It also can be implemented by abstract function and abstract class like the vitural func in c Last but not leastThose concepts of abstract and override could be written in another blogs However this blog is the first blog of mine I hope I could get some feedbacks and advice from our members of DEV community and then move forward again Your advice and comments are the power of my moving forward Thank you for your reading Never know how good you will be if you don t push yourself Ricky Ruan E mail yruan umass edu	2021-08-21 06:22:00
Apple	AppleInsider - Frontpage News	Sketchy leak purportedly shows 'iPhone 13 Pro' rear case in new rose gold color	https://appleinsider.com/articles/21/08/21/sketchy-leak-purportedly-shows-iphone-13-pro-in-new-rose-gold-color?utm_medium=rss	Sketchy leak purportedly shows x iPhone Pro x rear case in new rose gold colorA pair of supposedly leaked images posted to Twitter this week could offer one of the first looks at Apple s upcoming iPhone Pro though sources claims of a new rose gold color leaves the authenticity of the photos in question The photos posted to Twitter by Majin Bu on Thursday and later spotted by avid leaker Duan Rui show what appears to be the rear side of a partially assembled iPhone Pro Majin Bu was told that the iPhone unit bears a ーdecidedly very dark ーrose gold color though the pictured part is perhaps more likely a graphite or pre production black model under warm lighting Read more	2021-08-21 06:59:59
ニュース	BBC News - Home	Covid: CO2 monitors for schools and Euro 2020 a 'significant risk'	https://www.bbc.co.uk/news/uk-58288774	coronavirus	2021-08-21 06:43:50
ニュース	BBC News - Home	Kongo claims dramatic submission to win heavyweight thriller at Bellator 265	https://www.bbc.co.uk/sport/mixed-martial-arts/58290600	Kongo claims dramatic submission to win heavyweight thriller at Bellator France s Cheick Kongo dramatically beat Russian Sergei Kharitonov to win the battle of the heavyweight veterans in the main event of Bellator	2021-08-21 06:20:16
LifeHuck	ライフハッカー［日本版］	ズームはNG！ スマホで夕日をきれいに撮る方法	https://www.lifehacker.jp/2021/08/how-take-glorious-sunset-photos-with-your-smartphone.html	通常	2021-08-21 16:00:00
ニュース	Newsweek	小さな子供がいる家庭にぴったり！ 「優しい」性格が特長の小型犬20種	https://www.newsweekjapan.jp/stories/world/2021/08/post-96945.php		2021-08-21 15:03:00