投稿時間:2023-02-27 11:30:37 RSSフィード2023-02-27 11:00 分まとめ(31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
ROBOT	ロボスタ	NECと東村山市、IoTや都市OSの実証実験　災害時に情報収集と共有【日本初】自治体のデータ基盤を連携　東京データプラットフォームとは	https://robotstart.info/2023/02/27/nec-higashimurayama-tdpf.html	NECと東村山市、IoTや都市OSの実証実験災害時に情報収集と共有【日本初】自治体のデータ基盤を連携東京データプラットフォームとはシェアツイートはてブこれまで自治体職員は災害時に限られた人手で住民対応通報対応、応急対策、避難所運営等を行うとともに、避難所等の建物や給水ステーション等のインフラの稼働状況を目視で点検してきた。	2023-02-27 01:00:31
IT	ITmedia 総合記事一覧	[ITmedia News] Twitter、また大規模リストラ　Revue創業者や“ハードコア”なクロフォード氏も対象	https://www.itmedia.co.jp/news/articles/2302/27/news090.html	itmedianewstwitter	2023-02-27 10:09:00
TECH	Techable（テッカブル）	パナソニックら、マルチ決済SaaS「OneQR」を無人販売可能な自動搬送ロボットに搭載。丸の内で実証実験	https://techable.jp/archives/197517	elestyle	2023-02-27 01:30:01
TECH	Techable（テッカブル）	デュアル心拍センサー採用で高精度な健康管理を実現。BUGATTIのスマートウォッチ	https://techable.jp/archives/197455	bugatticeramiqueeditionon	2023-02-27 01:00:51
IT	情報システムリーダーのためのIT情報専門サイト IT Leaders	AI技術者向け教育コースに「数理知識」「機械学習」「深層学習」を追加─インターネット・アカデミー | IT Leaders	https://it.impress.co.jp/articles/-/24500	AI技術者向け教育コースに「数理知識」「機械学習」「深層学習」を追加ーインターネット・アカデミーITLeadersWeb専門の教育講座を運営するインターネット・アカデミーは年月日、AI分野の新講座に「AI数理知識講座」「AI機械学習講座」「AIディープラーニング講座」を追加した。	2023-02-27 10:35:00
AWS	AWS Japan Blog	週刊AWS – 2023/2/20週	https://aws.amazon.com/jp/blogs/news/aws-weekly-20230220/	amazoneks	2023-02-27 01:20:18
python	Pythonタグが付けられた新着投稿 - Qiita	【2023年版】機械学習の日本語無料学習教材まとめ	https://qiita.com/shuto_ishii/items/ff36b82e37d0c4ccc073	機械学習	2023-02-27 10:57:06
python	Pythonタグが付けられた新着投稿 - Qiita	[memo] TypeScriptでPythonのrange()っぽいものを使いたい	https://qiita.com/yoshi389111/items/bee4d7617c828e3644ec	memotypescript	2023-02-27 10:55:21
python	Pythonタグが付けられた新着投稿 - Qiita	AmazonCloudSearchに複数のドキュメントバッチを一括アップロード	https://qiita.com/Mohrey/items/36aba829192cdd5c1fdc	amaozoncloudsearch	2023-02-27 10:29:19
python	Pythonタグが付けられた新着投稿 - Qiita	[AWS]DynamoDB Localを使ってみた	https://qiita.com/to-fmak/items/3a6df367196ed216b1a4	dynamo	2023-02-27 10:25:48
js	JavaScriptタグが付けられた新着投稿 - Qiita	[memo] TypeScriptでPythonのrange()っぽいものを使いたい	https://qiita.com/yoshi389111/items/bee4d7617c828e3644ec	memotypescript	2023-02-27 10:55:21
js	JavaScriptタグが付けられた新着投稿 - Qiita	【JS】オブジェクトをforEachでループさせたい	https://qiita.com/teshimaaaaa1101/items/e22940ebe55a84fe392d	letarrayabcdarrayfo	2023-02-27 10:15:32
AWS	AWSタグが付けられた新着投稿 - Qiita	AmazonCloudSearchに複数のドキュメントバッチを一括アップロード	https://qiita.com/Mohrey/items/36aba829192cdd5c1fdc	amaozoncloudsearch	2023-02-27 10:29:19
AWS	AWSタグが付けられた新着投稿 - Qiita	[AWS]DynamoDB Localを使ってみた	https://qiita.com/to-fmak/items/3a6df367196ed216b1a4	dynamo	2023-02-27 10:25:48
AWS	AWSタグが付けられた新着投稿 - Qiita	【AWS】運用アカウントのDynamoDBから開発アカウントのS3にデータ抽出してみた。	https://qiita.com/Lycoris_radiata/items/de14ee3338423455bafa	dynamodb	2023-02-27 10:25:18
AWS	AWSタグが付けられた新着投稿 - Qiita	AWS と Azure の VPN 接続での苦悩と解決策 ～マルチクラウド冗長構成の模索～	https://qiita.com/y_matsuo_/items/c201926f70ffe5963afd	azure	2023-02-27 10:10:12
Azure	Azureタグが付けられた新着投稿 - Qiita	Azure Administrator(AZ-104)：Azure でのストレージの実装と管理「ストレージへのアクセス」	https://qiita.com/fsd-jume/items/52c732918a8393f37c2d	azureadministratoraz	2023-02-27 10:43:24
Azure	Azureタグが付けられた新着投稿 - Qiita	AWS と Azure の VPN 接続での苦悩と解決策 ～マルチクラウド冗長構成の模索～	https://qiita.com/y_matsuo_/items/c201926f70ffe5963afd	azure	2023-02-27 10:10:12
技術ブログ	Developers.IO	EventBridge Schedulerを使ってEC2を定期起動・停止するCloudFormationテンプレート	https://dev.classmethod.jp/articles/cloudformation-template-eventbridge-scheduler-ec2-start-stop/	amazo	2023-02-27 01:47:41
技術ブログ	Yahoo! JAPAN Tech Blog	ヤフートップページの裏側：記事推薦システムの試行錯誤と今後の挑戦	https://techblog.yahoo.co.jp/entry/2023022730415148/?cpt_n=BlogFeed&cpt_m=lnk&cpt_s=rss	試行錯誤	2023-02-27 11:01:00
技術ブログ	Yahoo! JAPAN Tech Blog	2023年3月の技術＆デザイン系イベント予定	https://techblog.yahoo.co.jp/entry/2023022730415145/?cpt_n=BlogFeed&cpt_m=lnk&cpt_s=rss	技術	2023-02-27 11:00:00
海外TECH	DEV Community	Understanding the this keyword in JavaScript	https://dev.to/brandonbawe/understanding-the-this-keyword-in-javascript-2kmh	Understanding the this keyword in JavaScriptThe this keyword is a very important concept in JavaScript However it has always been a tricky topic to comprehend especially for new JavaScript developers as well as developers with experience in other programming languages Although this is a bit of a complex topic it is also one that appears as soon as you begin writing your first JavaScript programs You will encounter it whether you are trying to access elements on the DOM build classes in Object oriented programming or use properties and methods of regular objects In this article we are going to take a deep dive into what the this keyword is all about With this objective in mind let s get right to it In JavaScript this is a reference to an object The object this refers to will vary depending on how and where this is being called The object that this refers to varies implicitly based on whether it is global on an object or in a constructor and can also vary explicitly based on usage of the Function prototype methods bind call and apply For the remainder of this article our main focus will be to learn what this refers to implicitly based on context and we ll learn how to use the bind call and apply methods to explicitly determine the value of this So let s go Implicit ContextThere are four main contexts in which the value of this can be implicitly inferred These contexts are the global contextas a method within an objectas a constructor on a function or classas a DOM event handler Global ContextIf we call this by itself meaning not within a function object or whatever it will refer to the global window object When you re working in a browser the global context will be window meanwhile if you re working in Node js the global context is global If you log the value of this in your browser console without any other code you will see what object this refers to console log this OutputWindow postMessage ƒ blur ƒ focus ƒ close ƒ parent Window … You can see that this is set to the window object which is the global object of a web browser You have probably learned that JavaScript functions have their own context for variables You might be tempted to think that this will follow the same rules inside a function but it doesn t A top level function will still retain the this reference of the global object In the example below we are going to log the value of this in a top level function function printThis console log this printThis OutputWindow postMessage ƒ blur ƒ focus ƒ close ƒ parent Window … The example shows that even within a function this still refers to the global object However this is not the case in strict mode When in strict mode the value of this in the global context is undefined Generally it is safer to use strict mode to reduce the chances of this having an unexpected scope Someone will rarely want to refer to the window object when using this As an object methodMethods are basically actions that can be performed on objects or tasks that an object can perform A method uses this to refer to the properties of the object Let s see what this looks like in code const cameroon name Cameroon language English French describe console log The official languages of this name are this language and this language cameroon describe Output The official languages of Cameroon are English and French A Class ConstructorA constructor on a class acts the same as a constructor on a function class Country constructor name yearofIndependence this name name this yearofIndependence yearofIndependence describe console log this name gained independence in this yearofIndependence const cameroon new Country Cameroon cameroon describe this in the describe method refers to the instance of Country which is cameroon A DOM Event HandlerIn the browser there exist a special this context for event handlers When using this in an event listener it will refer to the DOM element that fired the event In an event handler called by addEventListener this will refer to event currentTarget More often than not developers will simply use event target or event currentTarget as needed to access elements in the DOM but since the this reference changes in this context it is important to know In the following example we ll create a button add text to it and append it to the DOM When we log the value of this within the event handler it will print the target const button document createElement button button textContent Click me document body append button button addEventListener click function event console log this Output lt button gt Click me lt button gt Explicit ContextTo complicate matters a little more javascript provides three native methods that can be used to manipulate the way the this keyword behaves These methods are call apply and bind It is a little bit tricky to know exactly when to use any of these methods as it will depend on the context of your program bind is particularly useful when you want to use events to access properties of one class within another class Suppose you have separated your code into various parts that each perform their own specific actions you can use bind to explicitly infer the object you want this to refer to Now its time for us to learn how to use these three native methods to explicitly determine the object this refers to Call and ApplyWith call we can invoke a method passing an owner object as an argument In simpler terms we can call a method indicating to which object the this keyword will refer to Let s see an example to help us understand it better const person firstName Francesco lastName Sanchez sayName function return this firstName this lastName const person firstName Raul lastName Jimenez console log person sayName call person Output Raul Jimenez Here we have two objects Each with its firstName and lastName properties and then person object has a sayName method Then we call the person sayName method in the following way person sayName call person By doing this we re indicating that when the sayName method executes the this keyword won t refer to the object that owns the method person but to the object we passed as parameter person As a result we get the output we have seen above in our console Note If the given method accepts arguments we can pass them as well when we invoke it with call as seen in the example below const person firstName Francesco lastName Sanchez sayName function city country return this firstName this lastName city country const person firstName Raul lastName Jimenez console log person sayName call person Bogota Columbia Output Raul Jimenez Bogota Columbia The apply method works very similarly to call The only difference between them is that call accepts parameters as a list separated by colons and apply accepts them as an array So if we want to replicate the same example using apply we d have to do it like this const person firstName Francesco lastName Sanchez sayName function city country return this firstName this lastName city country const person firstName Raul lastName Jimenez console log person sayName apply person Bogota Columbia BindIn the same way as call and apply the bind method indicates the object to which the this keyword will refer when a given method executes But the difference with bind is that it will return a new function without executing it While with call and apply the function is executed right away using bind we must execute it separately Let s see this in an example const person firstName Francesco lastName Sanchez sayName function return this firstName this lastName const person firstName Raul lastName Jimenez const sayPersonName person sayName bind person console log sayPersonName Output Raul Jimenez Arrow FunctionsArrow functions do not have their own this binding Instead they go up to the next level of execution If you want to learn more about Arrow functions and how this behaves in Arrow functions check out this article ConclusionWe have seen in detail how the this keyword works in JavaScript how to implicitly and explicitly infer the object this refers to I hope you enjoyed reading this article as much as I enjoyed writing it up Hoping to bring more JavaScript packed articles to you soon Stay blessed	2023-02-27 01:37:33
Linux	OMG! Ubuntu!	Ubuntu Devs Working on New ‘Mini’ ISO (	https://www.omgubuntu.co.uk/2023/02/ubuntu-mini-iso-redux	Ubuntu Devs Working on New Mini ISO A new network installer is in development for Ubuntu The size of the ISO could be as low as MIB making it a good fit for USB CDs This post Ubuntu Devs Working on New Mini ISO lt MiB in Size is from OMG Ubuntu Do not reproduce elsewhere without permission	2023-02-27 01:08:24
海外科学	NYT > Science	Rural Hospitals Are Shuttering Their Maternity Units	https://www.nytimes.com/2023/02/26/health/rural-hospitals-pregnancy-childbirth.html	maternity	2023-02-27 01:46:02
海外科学	NYT > Science	Lab Leak Most Likely Caused Pandemic, Energy Dept. Says	https://www.nytimes.com/2023/02/26/us/politics/china-lab-leak-coronavirus-pandemic.html	Lab Leak Most Likely Caused Pandemic Energy Dept SaysThe conclusion which was made with “low confidence came as America s intelligence agencies remained divided over the origins of the coronavirus	2023-02-27 01:47:02
海外ニュース	Japan Times latest articles	U.S. sees China in ‘awkward’ international position over Ukraine	https://www.japantimes.co.jp/news/2023/02/27/world/china-awkward-position-ukraine/	U S sees China in awkward international position over UkraineU S national security adviser Jake Sullivan has emphasized that the Biden administration doesn t have evidence that China is giving lethal support to Russia in its	2023-02-27 10:19:33
ニュース	BBC News - Home	Minimum marriage age rises to 18 in England and Wales	https://www.bbc.co.uk/news/uk-politics-64748930?at_medium=RSS&at_campaign=KARANGA	children	2023-02-27 01:22:15
ビジネス	ダイヤモンド・オンライン - 新着記事	米国産原油の欧州向け輸出が急増、ウクライナ戦争で - WSJ発	https://diamond.jp/articles/-/318527	輸出	2023-02-27 10:20:00
仮想通貨	BITPRESS（ビットプレス）	[Bloomberg] 買収騒動に揺れたビットフライヤー、創業者の加納氏が社長復帰提案へ	https://bitpress.jp/count2/3_9_13562	bloomberg	2023-02-27 10:17:07
マーケティング	AdverTimes	「公民館とデザイン」考える企画展 東京・六本木で3月3日から	https://www.advertimes.com/20230227/article412352/	入場無料	2023-02-27 01:59:19
マーケティング	AdverTimes	博報堂DYHD、統合MPF推進局長ほか（23年4月1日付）	https://www.advertimes.com/20230227/article412370/	人事異動	2023-02-27 01:21:29