投稿時間:2021-08-20 00:34:31 RSSフィード2021-08-20 00:00 分まとめ(34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
TECH	Engadget Japanese	ネトフリが iPhone / iPadの空間オーディオ対応。AirPods Pro / Maxで別次元の臨場感	https://japanese.engadget.com/netflix-spatial-audio-ios-144235028.html	ネトフリがiPhoneiPadの空間オーディオ対応。	2021-08-19 14:42:35
IT	ITmedia 総合記事一覧	[ITmedia PC USER] 2種類のコアで「省電力」と「高パフォーマンス」を両立――Intelが「Alder Lake」の概要を公開　「Sapphire Rapids」にも新情報	https://www.itmedia.co.jp/pcuser/articles/2108/19/news149.html	alderlake	2021-08-19 23:30:00
Google	カグア！Google Analytics 活用塾:事例や使い方	蒸れない座面の広いゲーミングチェア5選【2021年版】長時間ゲームをプレイもあぐらもOKで座りやすい	https://www.kagua.biz/review/gamingdevice/20210819b2.html	集中	2021-08-19 14:59:23
python	Pythonタグが付けられた新着投稿 - Qiita	AWS SSM Parameter Storeにあるキーのリストをフィルターして取得する	https://qiita.com/dangoIoT/items/050d457676e417596bdf	戻り値ssmメソッド引数やりたいことAWSSSMParameterStoreから読み出すとき、Nameパラメーター名が決まっていれば、ssmgetparametersにその値を入れて終わりなのですが、「Nameの一部だけを知っている」場合に、同じ部分を持ったNameをListで取得できると、ssmgetparametersで一気にValueパラメーターの値を取得できて便利です。	2021-08-19 23:36:45
python	Pythonタグが付けられた新着投稿 - Qiita	COVID-19のグラフ化とWEB公開	https://qiita.com/redsquid/items/4dd471e52b4f1dc4fda6	COVIDのグラフ化とWEB公開はじめに新型コロナのcsvデータがNHKからダウンロードできるので、そのcsvデータを加工編集しx軸に年月日、y軸に各県毎の感染者数等のグラフを作成し、webで表示するまでのプログラムを作成したので公開します。	2021-08-19 23:31:25
js	JavaScriptタグが付けられた新着投稿 - Qiita	Tailwind CSSのインストール方法2 〜Purgeとcssnano編〜	https://qiita.com/YSasago/items/3c56ef248d5a01d27816	TailwindCSSのインストール方法Purgeとcssnano編はじめにPurge機能を使ってみようcssnano使ってみよう開発環境を構築しようはじめに前回の投稿でTailwindCSSのインスールはできたので、今回はTailwindCSSを最適化していきます。	2021-08-19 23:52:51
js	JavaScriptタグが付けられた新着投稿 - Qiita	React 入門道場　~Reactを学ぶ上で理解したいES5,ES6~	https://qiita.com/kinoshitaken123/items/3d9a56fcfc0d219f45de	目次Javascriptの標準仕様についてESについてESをESに変換するBabelまとめJavascriptの標準仕様についてJavaScriptの標準仕様はECMAScriptと呼ばれています。	2021-08-19 23:41:19
js	JavaScriptタグが付けられた新着投稿 - Qiita	react-pdfで罫線と文字列をPDF出力する	https://qiita.com/kashimuuuuu/items/0d249be6bcea834c473c	ProjectNameプロジェクトフォルダ└backend└┬reactapp└src└┬fonts│└ここに配置│┝components│└resumejs│└ーindexjsなぜフォントに「ナス」を使うのかフォントが「ナス」「源真ゴシック」出ないとPDF出力結果の全角かな文字が別の文字へ置き換えられてしまうため。	2021-08-19 23:40:06
Program	[全てのタグ]の新着質問一覧｜teratail（テラテイル）	pythonでライブラリpygameをインストールする方法（エラーの対処法）	https://teratail.com/questions/355177?rss=all	pythonでライブラリpygameをインストールする方法エラーの対処法前提・実現したいことpython初心者です。	2021-08-19 23:58:29
Program	[全てのタグ]の新着質問一覧｜teratail（テラテイル）	アニメーションレンダリングするとオブジェクトがチカチカする	https://teratail.com/questions/355176?rss=all	アニメーションレンダリングするとオブジェクトがチカチカする前提・実現したいことblenderでアニメーションレンダリングをしたいレンダーエンジンEeveeオブジェクト建物→マテリアル有りベースカラーのみ発生している問題・エラーメッセージオブジェクトの面にオレンジ色のノイズが出てチカチカ消えたり現れたりかすれたりします。	2021-08-19 23:54:21
Program	[全てのタグ]の新着質問一覧｜teratail（テラテイル）	macでEFIBootが出来ない	https://teratail.com/questions/355175?rss=all		2021-08-19 23:39:45
Program	[全てのタグ]の新着質問一覧｜teratail（テラテイル）	SwiftUIのListでrowをタップしてコピーする方法	https://teratail.com/questions/355174?rss=all	SwiftUIのListでrowをタップしてコピーする方法前提・実現したいことSwiftUIでListを作ったのですが、rowをタップしてコピーする方法が検索してもわかりません。	2021-08-19 23:39:31
Program	[全てのタグ]の新着質問一覧｜teratail（テラテイル）	LaravelでVue.jsを用いたフォームでのセッション	https://teratail.com/questions/355173?rss=all	今までJqueryを使用していた画面を、vueにしてみるということを、勉強も兼ねて行っています。	2021-08-19 23:31:51
Program	[全てのタグ]の新着質問一覧｜teratail（テラテイル）	Unity C# 子オブジェクトだけが動かない	https://teratail.com/questions/355172?rss=all	ちなみにプレハブは画像のようになっています。	2021-08-19 23:26:13
Program	[全てのタグ]の新着質問一覧｜teratail（テラテイル）	パケットキャプチャーの名前の由来について	https://teratail.com/questions/355171?rss=all	パケットキャプチャーの名前の由来について質問tcpdumpnbspでネットワークのトラフィックをダンプすることを「セグメントキャプチャー」や「フレームキャプチャー」ではなく、「パケットキャプチャー」というのはなぜですか。	2021-08-19 23:20:07
Program	[全てのタグ]の新着質問一覧｜teratail（テラテイル）	複数のカメラのdepthを異なる数値にしても意図した状態にならない	https://teratail.com/questions/355170?rss=all	複数のカメラのdepthを異なる数値にしても意図した状態にならないSpriterenderのエフェクトをDのオブジェクトの手前に表示してえなあ、ということで、エフェクトのレイヤー以外のすべてのレイヤーを映すメインのカメラ「Depthを」に。	2021-08-19 23:05:16
AWS	AWSタグが付けられた新着投稿 - Qiita	AWS SSM Parameter Storeにあるキーのリストをフィルターして取得する	https://qiita.com/dangoIoT/items/050d457676e417596bdf	戻り値ssmメソッド引数やりたいことAWSSSMParameterStoreから読み出すとき、Nameパラメーター名が決まっていれば、ssmgetparametersにその値を入れて終わりなのですが、「Nameの一部だけを知っている」場合に、同じ部分を持ったNameをListで取得できると、ssmgetparametersで一気にValueパラメーターの値を取得できて便利です。	2021-08-19 23:36:45
技術ブログ	Developers.IO	react-webcamで撮影した写真をAmazon Rekognitionで顔分析する（ローカル動作版）	https://dev.classmethod.jp/articles/face-analysis-of-photos-taken-with-react-webcam-on-amazon-rekognition/	amazonrekognition	2021-08-19 14:56:57
技術ブログ	Developers.IO	踏み台サーバ経由の多段SSH接続をローカル端末の秘密鍵のみで実施する	https://dev.classmethod.jp/articles/bastion-multi-stage-ssh-only-local-pem/	inomasoinomasosan	2021-08-19 14:55:18
海外TECH	DEV Community	JavaScript vs JavaScript. Fight!	https://dev.to/this-is-learning/javascript-vs-javascript-fight-53fa	JavaScript vs JavaScript Fight With software development we are often presented with alternative choices for libraries and tools that appear to accomplish the same sort of things Each one will advertise its key advantages and we attempt to weigh the pros and cons Sometimes the differentiators have less to do with what we are accomplishing and everything with how we accomplish it In those cases it isn t always as clear what the tradeoffs are Are these things that even matter There isn t a rule here Finding myself in the middle of these discussions regularly I thought I d share a few around JavaScript web development MPA vs SPASingle Page Apps vs Multi Page Apps is by far one of the biggest sources of confusion I ve seen for the web There are so many different patterns that exist for building websites and applications it is far from clear what people even mean by these terms Historical considerations aside the simplest heuristic for identifying between a Modern SPA and MPA is the concept of JavaScript entry point If it is the same for all pages you have a SPA If each page has its own topmost entry it is an MPA Your bundler might produce different chunks per page but if your application starts from the same point regardless of the page you have a SPA You can pre render it into different pages You can preload the per page chunks for each You can even turn off client side routing It is still a SPA architecturally Single application execution defines behavior for all pages Next Gatsby Nuxt SvelteKit you name it falls into this category Single Page App architecture applies to server rendered pages and statically rendered pages just the same So what s an MPA then A website or application that is written from the top at a per page level You can use the same components across pages but there is not a single entry point When the server receives a request and serves that page the JavaScript execution entry is unique to that page This means your routing is server side While a SPA can opt into this from a top level architectural perspective an MPA must function this way since it doesn t have the code immediately or lazily loaded to render any page other than itself Some tradeoffs are worth an article in itself But in short MPAs having no expectation of being re rendered in the browser can be optimized to send significantly less JavaScript In JavaScript land only a few frameworks are optimized for this scenario Marko is one And recently we ve seen frameworks like Astro and Elder provide wrappers for existing SPA frameworks Albeit ones that only support static rendering for now And Qwik as new framework from the creator of Angular also coming to answer the question It s worth mentioning MPAs are each pages themselves so they could always host a SPA on a given page And through iFrames or other HTML injection frameworks like Turbo it is possible to serve an MPA off a single page The key takeaway is that SPA vs MPA isn t about how many pages you are serving It is a decision you make depending on how important initial load performance MPA is versus future navigation experience SPA Either approach has tools to improve their weaknesses but each is fundamentally tailored to optimize for their primary usage React vs ReactivityYou ve probably heard somewhere React is not reactive Maybe someone thought it was a funny joke You know React is in the word Reactive Maybe you read a blog post that got into the fundamentals of push based observables versus scheduling Maybe you saw a framework advertise itself as Truly Reactive or Purely Reactive as a differentiator from React Here is the thing There have been many attempts to formalize what Reactive programming means Some are more narrow than others So much so that even within reactive circles we ve needed to differentiate between Functional Reactive Programming and Functional Reactive Programming The common thing driving all these solutions is they are systems based on declarative data You code in a style that describes the state in terms of fixed relationships You can think of it as equations in a spreadsheet The guarantee is that with any change everything stays up to date If this sounds like pretty much any web UI development you ve worked with it s for good reason HTML is declarative and we build on top of it At this point in terms of frameworks being reactive means any number of things Some take it to mean you have control over the primitives to wire up behavior but it would be hard not to consider React Hooks in this way Some take it to mean that updates happen automatically without calling an update function but these libraries like Vue and Svelte do in fact call component update functions behind the scenes Some take it to mean granular updates without diffing But every framework diffs more on that below Or that it means we remove scheduling but almost all frameworks batch changes and schedules them on the next microtask So React might not be formalized reactive programming but for all effective purposes the same things are being accomplished VDOM vs No VDOMDoes Old become the new new Well sort of All rendering in JavaScript frameworks comes down to knowing what has changed and updating the DOM accordingly The update part can be done pretty effectively with familiarity with DOM APIs All frameworks have access to these tools But what about knowing what has changed Believe it or not this process is similar in the majority of frameworks The reason is reading values from the DOM does not come without consequence In the worst case it can even cause premature paints So what do we do We store values outside of the DOM and compare those Has it changed yes Apply updates Otherwise no This is true of all libraries VDOM or not But how we go about this is where the differences lie There is axis along which solutions differ Granularity of change How much do we re run in response to the user changesWhat are we diffing data VDOM abstractionFor a VDOM library like React the granularity of change is per component On the first run the code you supply to render functions or function components executes and returns a bunch of Virtual Nodes The reconciler then creates the DOM nodes from that On subsequent runs new Virtual nodes are diffed from the previous Virtual Nodes and updates to the existing DOM nodes are patched in For a non VDOM library like Svelte the granularity of change is also per component This time the compiler has split create and update paths On the first run the create path creates the DOM nodes and initializes locally stored state On subsequent runs it calls the update path which compares the values of state and patches the DOM where applicable If these processes sound incredibly similar it s because they are The biggest difference is that the VDOM has an intermediate format for diffing instead of just a simple locally scoped object and Svelte s compiler just compiles only the needed checks in It can tell which attributes change or which locations child components are inserted You can apply similar optimizations to VDOM libraries as we ve seen with Inferno and Vue using compilation In so they recreating VNodes the similar to how a non VDOM library avoids unnecessary creation of DOM nodes It is all about memoization whether of VDOM nodes data objects or through reactive computations You can also achieve a similar separation of creation and updates at runtime using tagged template literal libraries like uhtml or Lit So what is the meaningful difference Not very much Diffing isn t that expensive The only thing left we have to play with is the granularity of change if ideal diffing and updates are about the same cost all we can do is do less diffing But granularity generally brings heavier creation costs Thankfully there is a lot more optimization to be done with compilers to address those creation costs JSX vs Template DSLsThis probably seems similar to the last comparison and it is related for sure Some people view JSX as HTML in JavaScript and Template DSLs or Single File Components SFCs as JS in HTML But the truth is these are all just JavaScript The output in the end is JavaScript with maybe some string HTML in there somewhere So if the output is more or less the same how are these different Well they are becoming exceedingly less different A framework like Svelte has full access to JavaScript in its Script tags and template expressions And JSX while dynamic still has contiguous blocks that can be analyzed statically and optimized So where is the difference Mostly around what can be inserted Attributes are easy to analyze and optimize but what goes between the tags in JSX could be a few things It could be text it could DOM elements it could components or control flow Ultimately though it s text or DOM elements So a template DSL removes a little bit of the guesswork with what is being passed here which otherwise requires a check every time But that isn t huge savings Even with JSX you have some ability to look at what the JavaScript expressions are doing SolidJS uses heuristics to determine if something could be reactive The biggest benefit of Template DSLs is the explicit syntax for control flow can make it more easily optimizable for different targets For instance a for loop is more optimal than map If you are rending on the server just creating a giant HTML string something as small as that can improve performance by a noticeable amount But that is just a simple abstraction But outside of these sort of scenarios there really isn t any differences fundamentally Sure most Template DSLs don t have equivalent to React s Render Props but they could Marko does Runtime vs Compiled ReactivityThis one might be a bit more niche but it s still a question I get often What s the difference It comes down to dependency tracking Runtime reactive systems like Solid MobX or Vue collect dependencies as their computations run They intercept reactive atoms signals refs observables reads and subscribe the wrapping scope to them So that later when those atoms update they can re run these computations The key thing is that since the dependency graph is built on the fly they are dynamic They can change run to run and in so you are managing a set of dependencies Every run means potentially new subscriptions and releasing others Compile time figures out the dependencies ahead of time In so there is no need to manage subscriptions as the relationship is fixed The code runs whenever the dependency changes This has far less overhead at runtime And even means that computations don t need to run to know their dependencies However these dependencies aren t dynamic so there is always a chance of oversubscribing and over executing Situations where runtime can pull reactivity from a deep call stack become harder because you can t know if something is reactive without tracing its bindings This works both ways though If you were to put a setTimeout in an effect with runtime reactivity by the time it executes it would not be in scope With compile time if it s inside the function it s easy to register the dependencies Similar considerations when you update values Svelte looks for an assignment operator which is why list push doesn t just work There is a lot to be done with the compiler and it is easier to do some things than others In the end for the most part in terms of raw performance this is mostly a wash But a compiler can bring a lot of other benefits when you can leverage specific syntax to better convey intent This is the next logical step over template DSLs and I think we are just scratching the surface here Components vs Web ComponentsI want to open this by saying if there is one takeaway here don t assume the word component means the same thing to everyone I ve been on both sides of this I used Web Components in production for years at the startup I previously work at and I ve also worked and written Component frameworks To me when people compare these they are talking about very different things A Web Component is very much a Custom Element in every sense It is a DOM node that encapsulates behavior with a common interface We get attributes and convenient hooks to write custom behavior on creation and when attached and removed from the DOM The latter lifecycles are important because they are complementary It means that for the most part all side effects are tied to DOM connectivity What is a Framework Component To paraphrase something Rich Harris once said they are tools to organize our minds Now that s abstract But that s the thing When you look at components in frameworks they are abstract They might output DOM elements or not Their lifecycle is not tied to the DOM Some manage state they are rendered on the server or maybe mobile They are anything the framework needs them to be The first is an interopt story the second an organization story Are these congruent goals To a point But neither will compromise on their primary purpose And in so they are destined to stay in their lanes I mean you can add more framework like behavior to Web Components but then you become a framework yourself and no longer are standard But as soon as you take the solution farther like SSR you are inventing new territory This can be argued to be ground for new standards but I d argue that standards development isn t an exercise in building a framework for the browser Opinions change technologies evolve In the web the DOM may be timeless but the way we organize our applications is not On the framework component side there is no lack of incentives to take the abstraction further The truth of the matter is a specific solution can always be more tailored to the problem And in so a React Component is always going to be capable of being better in a React App than a Web Component And this is true for any framework When people talk about re inventing the wheel they aren t wrong but how much does this matter In this petri dish of JavaScript frameworks constant re invention is the catalyst to evolution Ideally we are talking about sides of the same coin In practice there might be more friction there This isn t a use the platform or don t use the platform argument Web Components have a role to play as long as we clearly understand the difference Every framework uses the platform Some are just better than others And some better than Web Components can After all Web Components are just Custom Elements And sometimes more DOM nodes are not the solution to the problem It was fun to dive into a few topics that I ve gathered opinions on over the years If you have any ideas of similar comparisons let me know in the comments	2021-08-19 14:12:54
Apple	AppleInsider - Frontpage News	Apple Health division faces reduction after internal initiatives scale back	https://appleinsider.com/articles/21/08/19/apple-health-division-faces-reduction-after-internal-initiatives-scale-back?utm_medium=rss	Apple Health division faces reduction after internal initiatives scale backApple is scaling back its internal app HealthHabit to focus on Apple Watch development which could lead to job loss Apple to focus on Apple Watch developmentHealthHabit is facing a reduction in staff or total shutdown according to some Apple employees The internal app has seen dwindling engagement since its launch which has lead to downsizing the project Read more	2021-08-19 14:43:06
Apple	AppleInsider - Frontpage News	Apple premieres new 'Foundation' trailer before series debut on September 24	https://appleinsider.com/articles/21/08/19/apple-premieres-new-foundation-trailer-before-series-debut-on-september-24?utm_medium=rss	Apple premieres new x Foundation x trailer before series debut on September A new trailer for upcoming Apple TV series Foundation helps set the mood before the series premieres later this fall The series is based on the award winning novels by Isaac Asimov which follows a group of exiles on a journey to save humanity and rebuild civilization Initially a trilogy Isaac Asimov s Foundation was considered unfilmable even before he added a further four novels to the series This was largely because Asimov was more interested in ideas than characters and discarded all of them to have his future history story span a thousand years Read more	2021-08-19 14:36:22
Apple	AppleInsider - Frontpage News	Apple evaluating Apple Watch end link as basis for universal connector standard	https://appleinsider.com/articles/21/08/19/apple-evaluating-apple-watch-end-link-as-basis-for-universal-connector-standard?utm_medium=rss	Apple evaluating Apple Watch end link as basis for universal connector standardThe clever end link in Apple Watch could be brought to more devices as Apple investigates an attachment system that may even be how Apple Glass frames connect together The way to attach bands to Apple Watch was one of its best design ideasApple s design for the way you put bands on an Apple Watch was revolutionary and a newly revealed patent application wants to extend that to other uses Attachment system for an Electronic Device is a mixture of describing what it s already used for and what it could be Read more	2021-08-19 14:31:24
Apple	AppleInsider - Frontpage News	Institutional ownership of Apple surges in Q3, though still down year-over-year	https://appleinsider.com/articles/21/08/19/institutional-ownership-of-apple-surges-in-q3-though-still-down-year-over-year?utm_medium=rss	Institutional ownership of Apple surges in Q though still down year over yearInstitutional ownership of Apple shares increased in the June quarter though the percentage is still down year over year because of a massive sequential decline earlier in Morgan Stanley says Credit AppleIn a note to investors seen by AppleInsider Morgan Stanley analyst Katy Huberty writes that institutional ownership of Apple rose basis points quarter over quarter exiting the company s Q Institutional ownership refers to large organizations buying and holding shares of a company Read more	2021-08-19 14:10:54
海外TECH	Engadget	Microsoft announces a $60 wired Xbox Stereo Headset	https://www.engadget.com/microsoft-xbox-stereo-headset-wired-141414021.html?src=rss	Microsoft announces a wired Xbox Stereo HeadsetMicrosoft has unveiled a wired Xbox Stereo Headset At it s positioned as an entry level model compared with the Wireless Headset that emerged earlier this year and Designed for Xbox options from partners including Razer and Bang amp Olufsen The new model shares some features with the Wireless Headset including a similar design a volume dial on the right earcup and a microphone mute switch Microsoft says the device has quot high quality ear cushions quot and quot clear microphone performance quot MicrosoftThe headband is adjustable and as for sound quality Microsoft is promising quot clean mid and high frequency performance with strong bass quot There s also support for spatial audio tech such as Windows Sonic Dolby Atmos and DTS Headphone X The headset plugs into the Xbox controller through a mm cable As such you can use the headset with any other device that has a mm jack You can also use an adaptor to connect it to phones or tablets that don t have a dedicated headphone jack Pre orders are now open for the Xbox Stereo Headset through the Microsoft Store You ll be able to buy it from other retailers as well The headset will ship on September st	2021-08-19 14:14:14
金融	RSS FILE - 日本証券業協会	株券等貸借取引状況（週間）	https://www.jsda.or.jp/shiryoshitsu/toukei/kabu-taiw/index.html	貸借	2021-08-19 15:30:00
ニュース	@日本経済新聞 電子版	NYダウ続落で始まる　テーパリング前倒しを警戒 https://t.co/FI27XWYK70	https://twitter.com/nikkei/statuses/1428357304827535364	続落	2021-08-19 14:04:53
ニュース	BBC News - Home	Kabul evacuation: No planes leaving empty says UK defence secretary	https://www.bbc.co.uk/news/uk-58266555	counts	2021-08-19 14:51:43
ニュース	BBC News - Home	HMP Low Newton guard demanded sexual favours from inmates	https://www.bbc.co.uk/news/uk-england-tyne-58268531	activity	2021-08-19 14:09:13
ニュース	BBC News - Home	Pride: The fear, regret and elation of coming out	https://www.bbc.co.uk/news/uk-wales-58255735	absolute	2021-08-19 14:17:25
ニュース	BBC News - Home	Afghanistan: A woman's story of life under the Taliban in 1999	https://www.bbc.co.uk/news/world-asia-58250780	afghan	2021-08-19 14:32:53
北海道	北海道新聞	「痛恨の極み」と千葉県知事　医療確保、ワクチン急ぐ	https://www.hokkaido-np.co.jp/article/580004/	千葉県柏市	2021-08-19 23:10:00
北海道	北海道新聞	コロナ後に肺移植の女性が退院　提供した夫と息子も社会復帰	https://www.hokkaido-np.co.jp/article/579989/	新型コロナウイルス	2021-08-19 23:10:10
北海道	北海道新聞	１００人に解雇通知　青森・八戸の百貨店、コロナで売り上げ減	https://www.hokkaido-np.co.jp/article/579988/	売り上げ	2021-08-19 23:08:25