投稿時間:2023-02-18 15:11:24 RSSフィード2023-02-18 15:00 分まとめ(12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	Techable（テッカブル）	防犯カメラを天井・壁面に設置できるカメラ用壁面スタンドが便利そう	https://techable.jp/archives/195973	bktbkt	2023-02-18 05:00:17
AWS	AWS - Webinar Channel	Machine Learning in 15: What is ML governance?	https://www.youtube.com/watch?v=gAhm90cV7HU	amazon	2023-02-18 05:20:39
python	Pythonタグが付けられた新着投稿 - Qiita	既存のThird Party ExtensionsではMkDocsでテーブルのセル結合がうまくいかない	https://qiita.com/nicoyanagi/items/c3433e5da5f6a3060a30	markdown	2023-02-18 14:42:31
python	Pythonタグが付けられた新着投稿 - Qiita	SKJvillageのスクリーンショットで既存の顔のカスケード分類器を評価	https://qiita.com/nyar_ramen/items/e2fbea92c17da0cd9cd3	opencv	2023-02-18 14:41:49
python	Pythonタグが付けられた新着投稿 - Qiita	【備忘録】なぜかよく忘れるPython文法①	https://qiita.com/DotP_engineer/items/a0de083ecf1a7d03cd80	print	2023-02-18 14:34:42
python	Pythonタグが付けられた新着投稿 - Qiita	【Python】matplotlibで論文に使えるグラフを作る	https://qiita.com/yuki_2020/items/7f96c79614c2576a37d3	gnuplot	2023-02-18 14:27:55
AWS	AWSタグが付けられた新着投稿 - Qiita	Cloud Practitioner を受験して反省した話	https://qiita.com/yuki_ink/items/e3cc575d9fa243798915	cloudpractitioner	2023-02-18 14:27:34
AWS	AWSタグが付けられた新着投稿 - Qiita	terraformでPatch Manger構築	https://qiita.com/k-yasuhiro/items/b6abc5030e1e9d9615bc	patchmanger	2023-02-18 14:02:33
海外TECH	DEV Community	Top 10 Things to not do while coding!	https://dev.to/dhruvjoshi9/top-10-things-to-not-do-while-coding-2hl3	Top Things to not do while coding Coding is a highly skilled profession that requires attention to detail focus and a good understanding of the coding language However even the most experienced coders make mistakes and some mistakes can lead to hours of frustration or even worse program crashes To help you avoid these pitfalls here i collected the top things to not do while coding Lets see Don t Neglect Testing Testing is an essential part of coding that should never be overlooked Without testing your code may not work as intended and bugs can go unnoticed leading to serious consequences Don t Forget to Comment Comments are a crucial part of coding as they help others understand your code They also help you remember what you were thinking when you wrote the code and they make it easier to debug your program Don t Write Sloppy Code Sloppy code can lead to bugs crashes and security vulnerabilities Make sure to write clean efficient and well documented code to avoid these issues Don t Hardcode Values Hardcoding values can make your code less flexible and changes to the code can become more challenging Instead use variables and constants to make your code more adaptable and easier to maintain Don t Overcomplicate Your Code Simple code is often better than complex code Avoid adding unnecessary complexity to your code and strive for simplicity to make it easier to understand and maintain Don t Mix Business Logic with User Interface Logic Business logic should be separated from user interface logic to make it easier to maintain and test your code Keep your code organized and avoid mixing the two Don t Ignore Error Handling Error handling is an essential part of coding that can save you hours of debugging time Make sure to handle errors effectively to prevent crashes and other issues Don t Be Afraid to Ask for Help If you re stuck on a coding problem don t be afraid to ask for help There are many online communities and forums where you can find help and support Don t Assume Your Code Is Secure Security is a significant concern when coding and it s essential to make sure your code is secure Don t assume that your code is secure and take steps to ensure that it is Don t Give Up Coding can be challenging and it s easy to get discouraged when things don t go as planned However it s essential to persevere and keep trying With time practice and patience you can become a skilled and successful coder Closing upIn conclusion coding is an exciting and challenging profession that requires discipline patience and attention to detail By avoiding these common mistakes you can improve your coding skills write more efficient code and avoid costly errors Remember to test your code comment frequently and strive for simplicity and clarity With these tips you ll be on your way to becoming a proficient and successful coder	2023-02-18 05:48:09
海外TECH	DEV Community	How to use Docker with Ruby on Rails applications.	https://dev.to/harsh_u115/how-to-use-docker-with-ruby-on-rails-applications-4p13	How to use Docker with Ruby on Rails applications What is docker and how to use it with ruby on rails applications and benefits of using docker Docker is a platform for building shipping and running applications in containers A container is a lightweight standalone and executable package of software that includes everything needed to run an application including code runtime libraries system tools and settings Docker makes it easy to package an application and all its dependencies into a single container which can then be deployed to any environment that supports Docker Docker provides a way to package and distribute your application as a container which makes it easier to manage dependencies ensure consistent environments across different servers and simplify deployment Here are some of the benefits of using Docker with Ruby on Rails applications Consistent development environments By using Docker to create a container that contains all the necessary dependencies and tools for your application you can ensure that all developers are working in the same environment This can help prevent issues caused by differences in operating systems or installed software Easier deployment Docker allows you to package your application and its dependencies into a single container which can then be deployed to any server that supports Docker This makes it easier to move your application between development staging and production environments Improved scalability Docker containers can be easily replicated and scaled horizontally allowing you to handle more traffic by spinning up additional containers as needed This can help improve the performance and reliability of your application Simplified maintenance With Docker you can isolate your application and its dependencies from the host system which makes it easier to maintain and update your application without affecting other applications running on the same server Overall using Docker with Ruby on Rails applications can help simplify development deployment and maintenance while improving the performance and scalability of your application Here s a step by step example of how to use Docker with a Ruby on Rails application Sidekiq Redis and PostgreSQL Step Install DockerBefore you can use Docker you need to install it on your system You can download and install Docker from the official website Step Create a new Rails applicationAssuming you already have Ruby installed on your system you can create a new Rails application with the following command rails new myappStep Add Sidekiq to your applicationTo use Sidekiq with your Rails application you need to add the sidekiq gem to your Gemfile and run bundle install You should also generate a config sidekiq yml file with the following command bundle exec sidekiq config config sidekiq ymlStep Add Redis to your applicationTo use Redis with Sidekiq you need to add the redis gem to your Gemfile and run bundle install You should also configure Redis in your config sidekiq yml file Step Add PostgreSQL to your applicationTo use PostgreSQL with your Rails application you need to add the pg gem to your Gemfile and run bundle install You should also update your config database yml file to use PostgreSQL Step Create a DockerfileCreate a new file called Dockerfile in the root of your Rails application directory This file will define the Docker image for your application Here s an example Dockerfile for a Rails application with Sidekiq Redis and PostgreSQL Use an official Ruby runtime as a parent imageFROM ruby Set the working directoryWORKDIR app Install dependenciesRUN apt get update amp amp apt get install y build essential nodejs postgresql client amp amp rm rf var lib apt lists Install gemsCOPY Gemfile Gemfile lock RUN gem install bundler amp amp bundle install jobs Copy the application codeCOPY Expose portsEXPOSE Set the entrypoint commandCMD rails server b Step Create a docker compose yml fileCreate a new file called docker compose yml in the root of your Rails application directory This file will define the Docker services for your application Here s an example docker compose yml file for a Rails application with Sidekiq Redis and PostgreSQL version services web build command bundle exec rails s p b ports depends on db redis db image postgres environment POSTGRES USER postgres POSTGRES PASSWORD postgres POSTGRES DB myapp development redis image redis Step Build and start the Docker containersTo build and start the Docker containers for your application run the following command in the root of your Rails application directory docker compose up buildThis will build the Docker images and start the containers for your application Sidekiq Redis and PostgreSQL Step Access your applicationOnce the Docker containers are up and running you should be able to access your Rails application in your web browser at http localhost You should also be able to access the Sidekiq web interface athttp localhost sidekiq Step Stop and remove the Docker containersWhen you re finished working with your application you can stop and remove the Docker containers with the following command in the root of your Rails application directory docker compose stopThis will stop and remove the Docker containers for your application Sidekiq Redis and PostgreSQL That s it You ve now used Docker to run a Ruby on Rails application with Sidekiq Redis and PostgreSQL With Docker you can easily package and run your application in any environment making it easy to deploy and scale your application as needed How to do it with production Here s an example of how to deploy your Ruby on Rails application to a production environment using Docker and Docker Compose Step Build your Docker imageFirst you need to build your Docker image for your Rails application In the root of your Rails application directory run the following command docker build t myapp This will build a Docker image named myapp based on the Dockerfile in your Rails application directory Step Push your Docker image to a registryNext you need to push your Docker image to a registry so that it can be deployed to your production environment You can use a public registry like Docker Hub or a private registry like Amazon ECR or Google Container Registry To push your Docker image to Docker Hub first create an account if you don t have one already Then tag your Docker image with your Docker Hub username and the name of your image repository docker tag myapp your dockerhub username myapp latestFinally push your Docker image to Docker Hub docker push your dockerhub username myapp latestStep Create a production Docker Compose fileCreate a new file called docker compose prod yml in the root of your Rails application directory This file will define the Docker services for your production environment Here s an example docker compose prod yml file for a Rails application with Sidekiq Redis and PostgreSQL version services web image your dockerhub username myapp latest environment RAILS ENV production DATABASE URL postgres postgres password db myapp production REDIS URL redis redis ports depends on db redis restart always db image postgres environment POSTGRES USER postgres POSTGRES PASSWORD password POSTGRES DB myapp production volumes db data var lib postgresql data restart always redis image redis restart alwaysvolumes db data Note that the image property for the web service is set to the name of your Docker image on Docker Hub The environment properties set environment variables that your Rails application will use to connect to PostgreSQL and Redis The ports property maps port on the host to port in the container The depends on property specifies that the web service depends on the db and redis services The restart property specifies that the services should be restarted if they fail Step Deploy your application to a serverTo deploy your Rails application to a server you ll need to install Docker and Docker Compose on the server Once Docker and Docker Compose are installed copy your docker compose prod yml file to the server and run the following command in the directory where the file is located docker compose f docker compose prod yml up dThis will start the Docker containers for your Rails application Sidekiq Redis and PostgreSQL in the background Step Access your applicationOnce the Docker containers are up and running you should be able to access your Rails application in your web browser at http your server ip address You should also be able to access the Sidekiq web interface at http your server ip address sidekiqStep Update your applicationTo update your application you ll need to build a new Docker image for your updated code and push it to your Docker registry Then on the server you can pull the new image and start a new container using the following commands docker pull your dockerhub username myapp latest docker compose f docker compose prod yml up dThis will pull the new Docker image and start a new container for your application while leaving your database and Redis data intact Step Monitor your applicationTo monitor your Rails application in production you can use a tool like New Relic or Scout These tools provide real time monitoring and alerting for your application so you can quickly identify and fix any issues that arise Step Scale your applicationTo scale your Rails application in production you can use Docker Compose to run multiple containers of your Rails application behind a load balancer Here s an example docker compose prod yml file for running multiple containers of your Rails application version services web image your dockerhub username myapp latest environment RAILS ENV production DATABASE URL postgres postgres password db myapp production REDIS URL redis redis ports depends on db redis deploy replicas restart policy condition on failure update config parallelism delay s resources limits cpus memory M reservations cpus memory M db image postgres environment POSTGRES USER postgres POSTGRES PASSWORD password POSTGRES DB myapp production volumes db data var lib postgresql data redis image redis volumes db data Note that the web service has a deploy property that specifies that it should be run with replicas The update config property specifies that updates should be rolled out with a maximum parallelism of and a delay of seconds between updates The resources property sets resource limits and reservations for the containers With this configuration you can use a load balancer like Nginx or HAProxy to distribute traffic across the multiple containers of your Rails application Configure a reverse proxy like Nginx or Apache to route incoming HTTP requests to the Docker container running your Rails application You can configure the reverse proxy to listen on port or and forward requests to port which is the default port for Rails applications You can also configure SSL TLS encryption for secure connections Here is an example of an Nginx configuration file for a Rails application upstream myapp server localhost server listen server name example com location proxy pass http myapp proxy set header Host host proxy set header X Real IP remote addr proxy set header X Forwarded For proxy add x forwarded for Thanks Harsh	2023-02-18 05:15:00
ニュース	BBC News - Home	Rishi Sunak: We must double down on Ukraine military support	https://www.bbc.co.uk/news/uk-politics-64674431?at_medium=RSS&at_campaign=KARANGA	leaders	2023-02-18 05:15:16
ニュース	Newsweek	ヘンリーとメーガンが嫌われたのは「これが原因」？ 5年前の映像に再び注目集まる	https://www.newsweekjapan.jp/stories/world/2023/02/-5-2.php	女王さえ上回っていた結婚直後のヘンリー人気その見方が正しいかどうかは確かめる術もないが、当時のヘンリー王子夫妻が国民から受けていた支持と人気の高さは、ユーガブYouGovが年月から月に実施した世論調査でも証明されている。	2023-02-18 14:01:00