投稿時間:2021-05-15 13:25:43 RSSフィード2021-05-15 13:00 分まとめ(28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	自動運転の歩行速モビリティで動物園をゆっくり周遊　千葉市動物公園内をRakuRoペアリングツアー開催	https://robotstart.info/2021/05/15/chibazoo-rakurotour.html	rakuro	2021-05-15 03:24:57
python	Pythonタグが付けられた新着投稿 - Qiita	勾配ブースティング決定木（XGBoost, LightGBM, CatBoost）を実装してみた	https://qiita.com/DS27/items/1d0fe42fe2a406b7128a	勾配ブースティング決定木XGBoostLightGBMCatBoostを実装してみた製造業出身のデータサイエンティストがお送りする記事今回は勾配ブースティング決定木のつのアルゴリズムXGBoostLightGBMCatBoostを実装してみました。	2021-05-15 12:06:52
js	JavaScriptタグが付けられた新着投稿 - Qiita	配列に関数名を入れて、配列の中身を関数として呼び出す（JavaScript)	https://qiita.com/ulchicken/items/e37f27eb319de7d5f900	scriptjsletHP体力functionactifHPgtconsolelog通常攻撃elseconsolelog特殊攻撃actこれは体力が以上であれば通常攻撃、未満であれば特殊攻撃をするボスの行動パターンだ。	2021-05-15 12:56:31
js	JavaScriptタグが付けられた新着投稿 - Qiita	JavaScript の remove メソッド	https://qiita.com/takuo_maeda/items/cd50e4800b26dfac94bf	JavaScriptdocumentgetElementByIdtestremoveこれでtest要素を削除することが出来ます。	2021-05-15 12:11:37
js	JavaScriptタグが付けられた新着投稿 - Qiita	create-react-appで React + Typescriptの環境を構築	https://qiita.com/MasakiFukunishi/items/2af357c7b807c1cef2e1	createreactappでReactTypescriptの環境を構築createreactappを使ってReactTypescriptの環境を構築するメモです。	2021-05-15 12:01:57
js	JavaScriptタグが付けられた新着投稿 - Qiita	.querySelector()	https://qiita.com/takuo_maeda/items/bb819c42f7d9c1bb916b	CSS文法に従っていない例えば、コロンまたは不適切な空白を使用したものIDまたはセレクタにマッチさせるには、バックスラッシュを使用して文字をエスケープしなければいけません。	2021-05-15 12:01:49
Program	[全てのタグ]の新着質問一覧｜teratail（テラテイル）	CSSでfont-sizeを指定するとmarginも勝手に生成される	https://teratail.com/questions/338420?rss=all	CSSでfontsizeを指定するとmarginも勝手に生成されるCSSのmarginについてここに質問の内容を詳しく書いてください。	2021-05-15 12:58:03
Program	[全てのタグ]の新着質問一覧｜teratail（テラテイル）	pyenvでPythonをインストールできない(mac)	https://teratail.com/questions/338419?rss=all	pyenvでPythonをインストールできないmac前提・実現したいことpyenvでPythonをインストールしたいです。	2021-05-15 12:57:07
Program	[全てのタグ]の新着質問一覧｜teratail（テラテイル）	中に入る文字数に影響されずにカードの高さをそろえたい	https://teratail.com/questions/338418?rss=all	中に入る文字数に影響されずにカードの高さをそろえたい初歩的な質問で申し訳ありません。	2021-05-15 12:52:47
Program	[全てのタグ]の新着質問一覧｜teratail（テラテイル）	【ACCESS】定型入力の''-''をルックアップ先に反映させたい。	https://teratail.com/questions/338417?rss=all	テーブルBのフィールドbにルックアップでフィールドaの値を入力したいです。	2021-05-15 12:40:30
Program	[全てのタグ]の新着質問一覧｜teratail（テラテイル）	EKSにデプロイしたブログシステムのgunicornサーバが「WORKER TIMEOUT」となる	https://teratail.com/questions/338416?rss=all	EKSにデプロイしたブログシステムのgunicornサーバが「WORKERTIMEOUT」となる【背景】これまでECにデプロイしていたブログシステムをAWSnbspEKSクラスタ上への移行を行っています。	2021-05-15 12:35:45
Program	[全てのタグ]の新着質問一覧｜teratail（テラテイル）	OSError: [Errno 12] Cannot allocate memory Discord.py FFmpegPCMAudioでのエラーについて	https://teratail.com/questions/338415?rss=all	OSErrorErrnoCannotallocatememoryDiscordpyFFmpegPCMAudioでのエラーについてDiscordpyでBotを作っており、VCを用いたコマンドを作成しているところ次のエラーが出ました。	2021-05-15 12:25:49
Program	[全てのタグ]の新着質問一覧｜teratail（テラテイル）	input[type=”file”]にて選択したファイル名を表示したい。一つのページに複数あり。	https://teratail.com/questions/338414?rss=all	inputtypefileにて選択したファイル名を表示したい。	2021-05-15 12:19:14
Program	[全てのタグ]の新着質問一覧｜teratail（テラテイル）	SublimeText　閉じタグ　表示	https://teratail.com/questions/338413?rss=all	SublimeTextでコードの練習をしていたのですが色々設定をいじっていたら閉じタグが自動で表示されなくなってしまいました。	2021-05-15 12:17:02
Program	[全てのタグ]の新着質問一覧｜teratail（テラテイル）	JavaScript のプログラムがwebに表示されません。助けてください	https://teratail.com/questions/338412?rss=all	JavaScriptのプログラムがwebに表示されません。	2021-05-15 12:10:54
Program	[全てのタグ]の新着質問一覧｜teratail（テラテイル）	カレンダーの様な1年間の予定をプッシュ通知できる機能を実装する方法やサービス(できれば無料)	https://teratail.com/questions/338411?rss=all	カレンダーの様な年間の予定をプッシュ通知できる機能を実装する方法やサービスできれば無料androidアプリを開発しており、一度登録をすれば年間の予定をプッシュ通知してくれる機能を追加したいと考えています。	2021-05-15 12:05:54
Program	[全てのタグ]の新着質問一覧｜teratail（テラテイル）	Javascriptについて	https://teratail.com/questions/338410?rss=all	次にその売れ残りをすべてお惣菜にして販売したところ、売れ残った量のうちnbspqnbspが売れましたさて、mkgnbsp仕入れたこの食品は最終的に何kgnbsp売れ残ったでしょうか。	2021-05-15 12:02:03
Docker	dockerタグが付けられた新着投稿 - Qiita	DockerでCentOS環境作ってOutlookのPSTファイルをtextファイルに書き出した話	https://qiita.com/WdknWdkn/items/713a4ffc7e38f12691f6	Outlookのデータpstファイルをテキストに変換するreadpstコマンド利用よし、この「readpst」コマンドを使おう。	2021-05-15 12:21:08
Linux	CentOSタグが付けられた新着投稿 - Qiita	DockerでCentOS環境作ってOutlookのPSTファイルをtextファイルに書き出した話	https://qiita.com/WdknWdkn/items/713a4ffc7e38f12691f6	Outlookのデータpstファイルをテキストに変換するreadpstコマンド利用よし、この「readpst」コマンドを使おう。	2021-05-15 12:21:08
Git	Gitタグが付けられた新着投稿 - Qiita	初めてGithubに公開する時のコマンド	https://qiita.com/NoOne/items/92498b2c050cbaf68155		2021-05-15 12:59:54
海外TECH	DEV Community	How to make a horizontal layout list with Recyclerview	https://dev.to/tomokawaguchi/how-to-make-a-horizontal-layout-list-with-recyclerview-3bkc	How to make a horizontal layout list with RecyclerviewYou often encounter situations where you need to handle lists of items in mobile app development One of the approaches you could go with is utilising ListView and ArrayAdapter if your data is stored in an ArrayList as I explained in my previous article This is not a bad approach but it turns out it only caters for a vertical layout As I was looking for a way to display my list items horizontally and scrollable utilizing Recyclerview appears to be one of the best approaches What is RecyclerView If you are familiar with ListView RecyclerView is an improved version of it It allows us to implement the layout more flexibly as well as to handle a larger amount of data even more efficiently To understand RecyclerView better let s look at some of the features and requirements when you use RecyclerView In order to utilise RecyclerView you need to work with RecyclerView Adapter ViewHolder and LayoutManager RecyclerView Adapter is an adapter that populates the child items of the RecyclerView just like ArrayAdapter However it requires ViewHolder which acts as a kind of template of the child item ViewHolder pattern ViewHolder is handy for the adapter as it contains the details of views within a row Furthermore by defining this ViewHolder pattern first it eliminates the repetitive use of the findViewById method This saves us a lot from slowing down the app performance while scrolling the items When we utilise ArrayAdapter the process of recycling view was good but we still need to call the findViewById method multiple times to look up the elements to update the view data Compare to this using the ViewHolder approach is definitely more efficient Now let s talk about another key player for this topic LayoutManager As mentioned above one of the benefits of using RecyclerView is horizontal list layout and this is thanks to LayoutManager LayoutManager is basically in charge of positioning child items as well as decide when to reuse old views RecyclerView offers flexible layouts and there are different LayoutManagers which are LinearLayoutManager displaying items vertically or horizontallyGridLayoutManager displaying items in a grid vertically or horizontallyStaggeredGridLayoutManager displaying items in a staggered grid different width height are allowed By utilising these mentioned key players together RecyclerView can successfully create child items in an efficient way Now let s look at a detailed example of how to use RecyclerView How to use RecyclerViewIn this article we assume that we want to showcase a list of subjects in a horizontal layout Each item includes the name of the subject image and the number of likes First let s start with considering the high level view of what we need to do Define a model class called Subject to store all of your field types subject name image and number of likes Populate your subject s data and store it in an ArrayListDefine the layout of each list item TextViews and ImageView Create a custom RecyclerView and ViewHolder to showcase list itemsSet up the custom RecyclerView with a LayoutManager and adapterLet s tackle one by one We first need to define a class called Subject to store required fields and set up getter methods Subject javapublic class Subject private String subject private int imageId private int numOfLikes Constructor public Subject String subject int imageId int numOfLikes this subject subject this imageId imageId this numOfLikes numOfLikes Setting up the getter methods public String getSubject return subject public int getImageId return imageId public int getNumOfLikes return numOfLikes Once we have the data model class let s populate our ArrayList to contain subjects details MainActivity javaArrayList lt Subject gt subjectArrayList new ArrayList lt gt subjectArrayList add new Subject English R drawable english subjectArrayList add new Subject Math R drawable math subjectArrayList add new Subject P E R drawable pe subjectArrayList add new Subject Science R drawable science subjectArrayList add new Subject Art R drawable art etcNext we will quickly set up the layout of the individual item As mentioned we will have TextViews and ImageView for the example in this article Just a side note that if you want your layout to be VERTICAL be careful with the height of the row root view of the list as it needs to be wrap content to show your items correctly list item xml lt LinearLayout xmlns android xmlns tools android layout width wrap content android layout height wrap content android layout margin dp android orientation vertical gt lt ImageView android id id subject image view android layout width wrap content android layout height wrap content android layout marginBottom dp android scaleType centerCrop gt lt TextView android id id subject text view android layout width wrap content android layout height wrap content android layout gravity center horizontal gt lt TextView android id id likes text view android layout width wrap content android layout height wrap content android layout gravity center horizontal gt lt LinearLayout gt Now we will move on to our custom SubjectAdapter that extends the RecyclerView Adapter Please note here that we need to define a custom ViewHolder to specify and give access to all of the Views This is because we will use this custom ViewHolder later to bind the data It also prevents us from calling findById methods multiple times when the adapter assigns data to respective views SubjectAdapter javapublic class SubjectAdapter extends RecyclerView Adapter lt SubjectAdapter ViewHolder gt This is a template give a direct reference to each view public class ViewHolder extends RecyclerView ViewHolder public ImageView subjectImageView public TextView subjectTextView public TextView numOfLikesTextView Constructor accepts entire row item public ViewHolder NonNull View itemView super itemView Find each view by id you set up in the list item xml subjectImageView itemView findViewById R id subject image view subjectTextView itemView findViewById R id subject text view numOfLikesTextView itemView findViewById R id likes text view After setting up ViewHolder let s start working on the adapter now There are major things to do here setting up a constructor and overriding different methods which are onCreateViewHolder onBindViewHolder and getItemCount SubjectAdapter javapublic class SubjectAdapter extends RecyclerView Adapter lt SubjectAdapter ViewHolder gt ViewHolder class and its constructor as per above ArrayList lt Subject gt list Constructor public SubjectAdapter ArrayList lt Subject gt list this list list Creating a viewHolder NonNull Override public ViewHolder onCreateViewHolder NonNull ViewGroup parent int viewType Inflate the layout View contactView LayoutInflater from parent getContext inflate R layout list item parent false Return a new holder instance ViewHolder viewHolder new ViewHolder contactView return viewHolder Assigning respective data for the views based on the position of the current item Override public void onBindViewHolder NonNull SubjectAdapter ViewHolder holder int position Get the Subject based on the current position Subject currentItem list get position Setting views with the corresponding data ImageView imageView holder subjectImageView imageView setImageResource currentItem getImageId TextView subjectTextView holder subjectTextView subjectTextView setText currentItem getSubject TextView likesTextView holder numOfLikesTextView likesTextView setText currentItem getSubject Indicating how long your data is Override public int getItemCount return list size Here we start off by setting up a constructor for the adapter Simply passing the list of data so that our adapter can utilise it to populate items Next let s look at the onCreateViewHolder method This method is called by theLayoutManager and it handles layout inflation when needed Returning the ViewHolder with all of the necessary details is its role as well Moving onto the next the onBindViewHolder method plays a critical role to bind data to corresponding views By utilising the predefined view details from the ViewHolder it manages to replace the content efficiently Finally getItemCount method is a way to inform the adapter about the size of your data which is the total number of items to showcase After going through the above process all you need to do is to set up Recyclerview with your custom adapter and LayoutManager MainActivity java Find RecyclerView by Id from the activity main xml RecyclerView recyclerView findViewById R id recycler view Instantiate SubjectAdapter with the dataSubjectAdapter adapter new SubjectAdapter subjectsList Set adapter with RecyclerViewrecyclerView setAdapter adapter Set LayoutManagerrecyclerView setLayoutManager new LinearLayoutManager this RecyclerView HORIZONTAL false One thing to note here is that we chose to implement LinearLayoutManage with a horizontal layout this time Luckily it sets to be scrollable automatically if there are many items But if you wish to implement other styles you could do so here by instantiating different LayoutManager with your chosen dimension SummaryWe have gone through how to utilise RecyclerView with custom RecyclerView Adapter and LayoutManager This is one of the best approaches to efficiently display a list of items I found it quite useful and it has actually more to offer such as item animation I will write about this when I know it better Please feel free to leave a comment and your inputs are more than welcome and appreciated Thanks for reading	2021-05-15 03:21:47
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 03:58:48
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	agreement	2021-05-15 03:47:24
LifeHuck	ライフハッカー［日本版］	靴紐を結ぶのが地味〜に面倒…。それなら、転倒防止にもなる靴紐いらずアイテムはいかが？	https://www.lifehacker.jp/2021/05/amazon-shoelace.html	面倒	2021-05-15 13:00:00
北海道	北海道新聞	パラトライアスロン、谷は２位　世界シリーズ横浜大会	https://www.hokkaido-np.co.jp/article/544128/	世界シリーズ	2021-05-15 12:18:05
北海道	北海道新聞	沖縄復帰から４９年、基地に抗議　在日米軍施設、約７割が集中	https://www.hokkaido-np.co.jp/article/544132/	在日米軍	2021-05-15 12:05:00
北海道	北海道新聞	宣言追加決定から一夜、不安の声　変異株の懸念、地方にも	https://www.hokkaido-np.co.jp/article/544131/	新型コロナウイルス	2021-05-15 12:04:00
ビジネス	東洋経済オンライン	横浜ロープウェー｢異常時｣どう救助？【動画】 高さ40mの空中で止まる事態は想定されている | 街･住まい | 東洋経済オンライン	https://toyokeizai.net/articles/-/428583?utm_source=rss&utm_medium=http&utm_campaign=link_back	yokohamaaircabin	2021-05-15 12:10:00