投稿時間:2021-05-15 18:41:04 RSSフィード2021-05-15 18:00 分まとめ(43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…	Microsoft、｢HoloLens 3｣の開発は設計段階	https://taisy0.com/2021/05/15/140472.html	holole	2021-05-15 08:34:38
TECH	Techable（テッカブル）	OkazzのGenerative ArtをNFTとして販売する「Okazz’s Generative Art NFT」	https://techable.jp/archives/154596	generativeart	2021-05-15 08:00:21
python	Pythonタグが付けられた新着投稿 - Qiita	Pythonでデータの挙動を見やすくする可視化ツールを作成してみた（分類編）	https://qiita.com/c60evaporator/items/43866a42e09daebb5cc0	※クロスバリデーションの指定法は後述します分割クロスバリデーションclassplotclassseparatorplotmodelpetalwidthpetallengthspeciesiriscvdisplaycvindices次元特徴量の場合、個目を一定間隔で分割し、分割された区間の中央値を使用した予測値で決定境界を、分割された区間内のデータで散布図をプロットします次元特徴量の場合も、縦横に分割してプロット可能です。	2021-05-15 17:51:54
python	Pythonタグが付けられた新着投稿 - Qiita	Python boot camp by Dr.Angela day14	https://qiita.com/Shellyhackinglab/items/2ae42d25f34b2b97c4e6	PythonbootcampbyDrAngeladayMissiongtgtHigherLowerProgramAとBどちらの方がinstagramのfollower数が多いか、勝ち抜き戦をするゲーム。	2021-05-15 17:50:14
python	Pythonタグが付けられた新着投稿 - Qiita	Pythonでヌメロンを作ってみた	https://qiita.com/kyo3/items/0b5d02c311aa398b967e	最後の処理は、eatカウントと入力した桁数が一致した場合、勝利フラグをtrueにして、while文を抜けることができます。	2021-05-15 17:11:25
Program	[全てのタグ]の新着質問一覧｜teratail（テラテイル）	Unity パッケージマネージャーエラー	https://teratail.com/questions/338458?rss=all	Unityパッケージマネージャーエラー調べてみたのですが解決方法も原因もわからず質問いたしました。	2021-05-15 17:49:28
Program	[全てのタグ]の新着質問一覧｜teratail（テラテイル）	親画面の印刷範囲にならずに子画面の範囲のみ印刷できるようにしたい	https://teratail.com/questions/338457?rss=all	親画面の印刷範囲にならずに子画面の範囲のみ印刷できるようにしたい仕事で抱えている問題で、ソースコードはお見せることができず、解決までいかなくても何かヒント得られたらと思います。	2021-05-15 17:43:06
Program	[全てのタグ]の新着質問一覧｜teratail（テラテイル）	Nodejsでipを変えてパケットを送信する	https://teratail.com/questions/338456?rss=all	Nodejsでipを変えてパケットを送信するNodejsでipを変更してパケットを送りたいです。	2021-05-15 17:37:33
Program	[全てのタグ]の新着質問一覧｜teratail（テラテイル）	gitの追跡を外さずにディレクトリ名を変更したい	https://teratail.com/questions/338455?rss=all	gitの追跡を外さずにディレクトリ名を変更したいわからないこと追跡を維持したままディレクトリ名を変更したいと考えております。	2021-05-15 17:36:19
Program	[全てのタグ]の新着質問一覧｜teratail（テラテイル）	unicornと疎通できているか確認したい。	https://teratail.com/questions/338454?rss=all	unicornと疎通できているか確認したい。	2021-05-15 17:26:28
Program	[全てのタグ]の新着質問一覧｜teratail（テラテイル）	sessionをActionCableで送信したメッセージ内で使用する方法	https://teratail.com/questions/338453?rss=all	sessionをActionCableで送信したメッセージ内で使用する方法ActionCableで送信したメッセージの中で、sessionを使いたいのですが、認識されていません。	2021-05-15 17:19:39
Program	[全てのタグ]の新着質問一覧｜teratail（テラテイル）	glfwGetTime();関数を使ってフレームレートを固定する方法が知りたい。	https://teratail.com/questions/338452?rss=all	glfwGetTime関数を使ってフレームレートを固定する方法が知りたい。	2021-05-15 17:05:06
Program	[全てのタグ]の新着質問一覧｜teratail（テラテイル）	webpack問題（Rails 6.1.3.2）	https://teratail.com/questions/338451?rss=all	webpack問題Rails知りたいこと先日Railsのバージョンを最新にしたことにより、コンフリクトが起きて、railsnbsps等のコマンドでエラーが出るようになりました。	2021-05-15 17:04:07
Program	[全てのタグ]の新着質問一覧｜teratail（テラテイル）	user以外で本人を見分ける	https://teratail.com/questions/338450?rss=all	現状	2021-05-15 17:04:07
Program	[全てのタグ]の新着質問一覧｜teratail（テラテイル）	Cupyを実行したときに「NVRTCError: NVRTC_ERROR_COMPILATION (6)」が起きます	https://teratail.com/questions/338449?rss=all	Cupyを実行したときに「NVRTCErrorNVRTCERRORCOMPILATION」が起きます前提・実現したいこと「QuadronbspK」にnvidia社のCUDAnbsptoolkitnbspをインストールし、pythonにてCupyを実行したときエラーメッセージが表示されました。	2021-05-15 17:01:57
Ruby	Rubyタグが付けられた新着投稿 - Qiita	ransackを使う	https://qiita.com/yuukinakamura0925/items/3d174268b9231053cfad		2021-05-15 17:39:53
AWS	AWSタグが付けられた新着投稿 - Qiita	CentOS6.xでAmazon EFSとの通信経路をTLS暗号化した時のメモ	https://qiita.com/nakamura_trinet_co_jp/items/7a87100d281e54b1da00	コンパイルに必要なパッケージのインストールyumyinstallgccgitmakenksutilsrpmbuildzlibdevelopensslのインストールsharedライブラリは作成せずアーカイブのみ作成します。	2021-05-15 17:49:35
AWS	AWSタグが付けられた新着投稿 - Qiita	【AWS】S3とRoute53についてまとめてみた	https://qiita.com/Ryo9597/items/6d89595840a659b646cb	それではRouteでセカンダリの設定を行いますルートコンソールで「Route」と検索→左ペイン内の「ホストゾーン」を選択→「awslessontk」を選択フェイルオーバーに変更します。	2021-05-15 17:38:07
Ruby	Railsタグが付けられた新着投稿 - Qiita	ransackを使う	https://qiita.com/yuukinakamura0925/items/3d174268b9231053cfad		2021-05-15 17:39:53
Ruby	Railsタグが付けられた新着投稿 - Qiita	[ActiveStorage]画像複数枚投稿のエラー	https://qiita.com/takuo_maeda/items/c6a9f753b995c804c028	環境RailsActivestorageRubypDevise現在写真投稿機能にプレビュー機能を追加が終わり、続いて複数枚投稿機能を実装中です。	2021-05-15 17:22:15
技術ブログ	Developers.IO	【AWS CDK】API Gateway と Cognito で Client Credentials Grant による認証を試してみた	https://dev.classmethod.jp/articles/cognito-client-credentials-by-cdk/	apigateway	2021-05-15 08:38:34
技術ブログ	Developers.IO	【レポート】AI と機械学習を使ったビジネス課題の解決方法 #AWS-03 #AWSSummit	https://dev.classmethod.jp/articles/awssummit-2021-aws-03/	awsawssummit	2021-05-15 08:02:31
海外TECH	DEV Community	Creating Complex Animations using CSS Keyframes (video)	https://dev.to/thenerdydev/creating-complex-animations-using-css-keyframes-37ib	Creating Complex Animations using CSS Keyframes video In this video we will learn how we can create complex animations using CSS Keyframes We will make use of the keyframes CSS rule to define the percentage of time through a timing sequence Follow me on Twitter Instagram	2021-05-15 08:22:34
海外TECH	DEV Community	Understanding CSS Transitions (video)	https://dev.to/thenerdydev/understanding-css-transitions-mm8	Understanding CSS Transitions video In this video we will learn about CSS Transitions in great detail Follow me on Twitter Instagram	2021-05-15 08:21:34
海外TECH	DEV Community	Django Models Anti Patterns	https://dev.to/thearjun/django-models-anti-patterns-1ma1	Django Models Anti PatternsHello pals While working with Django we all write code that does the job but some code may be performing excessive computations or operations that we are unaware of These operations may be ineffective and or counterproductive in practice Here I am going to mention some anti patterns in Django models A Using len queryset instead of queryset count The queryset in Django are lazily evaluated which means that records in database aren t read from database until we interact with the data len queryset performs the count of database records by Python interpreter in application level For doing so all the records should be fetched from the database at first which is computationally heavy operation Whereas queryset count calculates the count at the database level and just returns the count For a model Post from django db import modelsclass Post models Model author models CharField max length title models CharField max length content models TextField If we use len queryset it handles the calculation like SELECT FROM post which returns a list of records queryset and then python interpreter calculates the length of queryset which is similar to list data structure Imagine the waste in downloading many records only to check the length and throw them away at the end But if we need the records after reading the length then len queryset can be valid If we use queryset count it handles the calculation like SELECT COUNT FROM post at database level It makes the code execution quicker and improves database performance B Using queryset count instead of queryset exists While we kept praising the use of queryset count to check the length of a queryset using it may be performance heavy if we want to check the existence of the queryset For the same model Post when we want to check if there are any post written by author Arjun we may do something like posts by arjun Queryset Post objects filter author iexact Arjun if posts by arjun count gt print Arjun writes posts here else print Arjun doesnt write posts here The posts by arjun count performs an SQL operation that scans every row in a database table But if we are just interested in If Arjun writes posts here or not then more efficient code will be posts by arjun Queryset Post objects filter author iexact Arjun if posts by arjun exists print Arjun writes posts here else print Arjun doesnt write posts here posts by arjun exists returns a bool expression that finds out if at least one result exists or not It simply reads a single record in the most optimized way removing ordering clearing any user defined select related or distinct methods Also checking existence truthiness of queryset like this is inefficient posts by arjun Queryset Post objects filter author iexact Arjun if posts by arjun print Arjun writes posts here else print Arjun doesnt write posts here This does the fine job in checking if there are any posts by Arjun or not but is computationally heavy for larger no of records Hence use of queryset exists is encouraged for checking existence truthiness of querysets C Using signals excessivelyDjango signals are great for triggering jobs based on events But it has some valid cases and they shouldn t be used excessively Think of any alternative for signals within your codebase brainstorm on its substitution and try to place signals logic in your models itself if possible They are not executed asynchronously There is no background thread or worker to execute them If you want some background worker to do your job for you try using celery As signals are spread over separate files if you re working on a larger project they can be harder to trace for someone who is a fresh joiner to the company and that s not great Although django debug toolbar does some help in tracing the triggered signals Let s create a scenario where we want to keep the record of Post writings in a separate model PostWritings class PostWritings models Model author models CharField max length unique True posts written models PositiveIntegerField default If we want to automatically update the PostWritings record for a use based on records created on Post model there are ways to achieve the task with without signals A With Signalsfrom django db models signals import post savefrom django db models import Ffrom django dispatch import receiverfrom models import Post receiver sender Post post save def post writing handler sender instance created kwargs if created writing created PostWritings objects get or create author instance author writing update posts written F posts written B Without SignalsWe need to override the save method for Post model from django db import modelsfrom django db models import Fclass Post models Model author models CharField max length title models CharField max length content models TextField def save self args kwargs Overridden method author self author if self id writing created PostWritings objects get or create author author writing update posts written F posts written super Post self save args kwargs As the same job can be accomplished without signals the code can be easily traced and prevent unnecessary event triggers If someone feels about not having readability on save method here breaking up code is always great Let s do that from django db import modelsfrom django db models import Fclass Post models Model author models CharField max length title models CharField max length content models TextField def update post writing self created False author None if author is not None and craeted writing created PostWritings objects get or create author author writing update posts written F posts written def save self args kwargs Overridden method author self author created self id is None super Post self save args kwargs self update post writing created author Looks like we ve learned how to mitigate some Django Model Anti Patterns For now thank you everyone for having me here I ll be continuing with more stuffs about Django very soon You can also find me on GitHub Till then keep coding	2021-05-15 08:17:44
Apple	AppleInsider - Frontpage News	How to make a QR code on your iPhone to connect guests to your Wi-Fi	https://appleinsider.com/articles/21/05/14/how-to-make-a-qr-code-to-connect-guests-to-your-wi-fi?utm_medium=rss	How to make a QR code on your iPhone to connect guests to your Wi FiRather than have a guest select your Wi Fi network and then enter a fiddly password just make them a QR code their iPhone can read Here s how to do it Give your guests a QR code and they can instantly log on to your Wi Fi networkYou wouldn t want to put a QR code for accessing your network up on street corners like a lost cat photo Yet when someone you trust comes to your house giving them your Wi Fi password is as important as showing them where the restroom is ーif fiddlier Read more	2021-05-15 08:32:08
海外科学	NYT > Science	What We Know About China’s Mars Rover Zhurong Landing	https://www.nytimes.com/2021/05/14/science/china-mars.html	competition	2021-05-15 08:46:43
海外ニュース	Japan Times latest articles	Pandemic to be ‘far more deadly’ this year, WHO warns	https://www.japantimes.co.jp/news/2021/05/15/world/who-2021-coronavirus-warning/	variants	2021-05-15 18:52:57
海外ニュース	Japan Times latest articles	Businesses hope tougher COVID-19 measures will speed return to normal	https://www.japantimes.co.jp/news/2021/05/15/business/economy-business/japan-emergency-economy-coronavirus/	Businesses hope tougher COVID measures will speed return to normalSome businesses have lamented the delay in implementing the new restrictions criticizing the central government for a lack of foresight	2021-05-15 18:14:12
海外ニュース	Japan Times latest articles	Japan secures extra Pfizer vaccine doses for 25 million people	https://www.japantimes.co.jp/news/2021/05/15/national/pfizer-vaccines-japan/	Japan secures extra Pfizer vaccine doses for million peopleCombining the additional million doses under the deal with the million under its previous Pfizer contract Japan will be able to inoculate	2021-05-15 18:05:31
海外ニュース	Japan Times latest articles	Sip, snack and stand in style at No. 502	https://www.japantimes.co.jp/life/2021/05/15/food/sip-snack-no-502-wine-bar/	stores	2021-05-15 19:00:00
海外ニュース	Japan Times latest articles	Pioneering composer Terry Riley finds himself comfortably marooned in Japan	https://www.japantimes.co.jp/culture/2021/05/15/music/composer-terry-riley-japan/	stravinsky	2021-05-15 19:00:13
海外ニュース	Japan Times latest articles	Ransomware is a national security threat. Treat it like one.	https://www.japantimes.co.jp/opinion/2021/05/15/editorials/ransomware-is-a-national-security-threat/	Ransomware is a national security threat Treat it like one In the Colonial Pipeline attack the perpetrator was identified as a cybercriminal group called DarkSide which admitted its involvement but said it did not want	2021-05-15 19:00:27
ニュース	BBC News - Home	Covid: Get the jab plea as Army deployed in hotspots	https://www.bbc.co.uk/news/uk-57126318	indian	2021-05-15 08:28:37
ニュース	BBC News - Home	Israel-Gaza violence: US envoy arrives for de-escalation talks	https://www.bbc.co.uk/news/world-middle-east-57125479	casualties	2021-05-15 08:35:07
北海道	北海道新聞	大型店に土日休業要請　道方針　札幌など重点地域　緊急事態１６日発令	https://www.hokkaido-np.co.jp/article/544155/	緊急事態	2021-05-15 17:18:04
北海道	北海道新聞	函館在住３人感染　新型コロナ	https://www.hokkaido-np.co.jp/article/544193/	釧路市	2021-05-15 17:15:00
北海道	北海道新聞	トライアスロン、小田倉真１６位　横浜大会、五輪最有力	https://www.hokkaido-np.co.jp/article/544190/	世界シリーズ	2021-05-15 17:12:00
北海道	北海道新聞	将棋、西山女王が４連覇に王手　マイナビ女子オープン第３局	https://www.hokkaido-np.co.jp/article/544189/	連覇	2021-05-15 17:12:00
北海道	北海道新聞	妊婦にワクチン「メリット大」　新型コロナで学会	https://www.hokkaido-np.co.jp/article/544188/	日本産科婦人科学会	2021-05-15 17:12:00
北海道	北海道新聞	道内２人死亡、５６６人感染　新型コロナ　札幌は３４４人	https://www.hokkaido-np.co.jp/article/544165/	新型コロナウイルス	2021-05-15 17:09:56
北海道	北海道新聞	マンダム、３８年ぶりロゴ刷新　「Ｍ」や笑顔をイメージ	https://www.hokkaido-np.co.jp/article/544187/	化粧品メーカー	2021-05-15 17:02:00
北海道	北海道新聞	浅草の三社祭、静かな初夏の訪れ　コロナで名物みこし中止	https://www.hokkaido-np.co.jp/article/544186/	東京都台東区	2021-05-15 17:02:00