投稿時間:2021-08-08 15:28:37 RSSフィード2021-08-08 15:00 分まとめ(36件)

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TECH	Engadget Japanese	ドライカーボン × ナッパレザー。未使用時には折り畳めるメガネケース「WIZ Folding Glass Case」	https://japanese.engadget.com/wiz-folding-glass-case-051004435.html	形状が似たメガネケースにありがちな余計な固定用フラップやフックパーツなどの固定具を一切使用しないシンプルなトライアングル形状を実現しています。	2021-08-08 05:10:04
python	Pythonタグが付けられた新着投稿 - Qiita	小さなDX②：python sqlite3で食事の内容を決める	https://qiita.com/be_tiger/items/ce2b1b91b6c1cb85591a	悩む時間の削減と日の摂取カロリーが上限超えなければ良いExcelで作成したカロリー表をpandasで読み込むpandasexcelデータ読み込みimportpandasaspdexcelデータは事前に作成。	2021-08-08 14:54:11
python	Pythonタグが付けられた新着投稿 - Qiita	PythonからSlackにメッセージを送信する	https://qiita.com/1te10675r/items/87f987969399dcc0e3b1	チャンネルへのメッセージの送信Slack上にて先ほど作成したAppを選択し、送信先のチャンネルを追加する下の例であれば、testチャンネルへメッセージを送信したいので、testをアプリに追加。	2021-08-08 14:31:42
Program	[全てのタグ]の新着質問一覧｜teratail（テラテイル）	Unity 発射したミサイルに角度を付けたい	https://teratail.com/questions/353307?rss=all	Unity発射したミサイルに角度を付けたいこのようにミサイルを方向に発射する機能を作りたいのですが、発射したミサイルに緑色で記したように角度を付けたいです。	2021-08-08 14:55:52
Program	[全てのタグ]の新着質問一覧｜teratail（テラテイル）	JSONをjQuery取得で存在しないデータが取得されている	https://teratail.com/questions/353306?rss=all	JSONをjQuery取得で存在しないデータが取得されている前提・実現したいことJSONをjQuery取得しようとしたら不明なデータが挿入されてundefinedが出力されてしまいます。	2021-08-08 14:54:05
Program	[全てのタグ]の新着質問一覧｜teratail（テラテイル）	vscode+java+Spring Boot+HTML+CSSを使って画面を表示したいです。	https://teratail.com/questions/353305?rss=all	前提・実現したいことvscodejavaSpringnbspBootHTMLCSSを使って画面を表示したいです。	2021-08-08 14:46:23
Program	[全てのタグ]の新着質問一覧｜teratail（テラテイル）	PythonのコードをC#かVBに変換したい	https://teratail.com/questions/353304?rss=all	PythonのコードをCかVBに変換したい下記PythonのコードをVBかCに変換したいです。	2021-08-08 14:36:24
Program	[全てのタグ]の新着質問一覧｜teratail（テラテイル）	SeleniumのSend_keysを用いたスラッシュ(/)のテキスト入力方法	https://teratail.com/questions/353303?rss=all	SeleniumのSendkeysを用いたスラッシュのテキスト入力方法前提・実現したいことseleniumのsendkeyでURLをテキストボックスに入力したい。	2021-08-08 14:32:54
Program	[全てのタグ]の新着質問一覧｜teratail（テラテイル）	m5stack　コンパイルエラー	https://teratail.com/questions/353302?rss=all	mstackコンパイルエラー前提・実現したいことmstacのbasicの環境設定をしていてhelloWorldを動作したいです発生している問題・エラーメッセージエラーメッセージArduinoWindowsボードMStackCoreESPQIOMHzDefaultNoneexeccmdexecutablefilenotfoundinPATHボードMStackCoreESPに対するコンパイル時にエラーが発生しました。	2021-08-08 14:32:22
Program	[全てのタグ]の新着質問一覧｜teratail（テラテイル）	[Unity3D] ゲームオブジェクトの位置をプレイヤーの高さを同じにする方法	https://teratail.com/questions/353301?rss=all		2021-08-08 14:16:31
Program	[全てのタグ]の新着質問一覧｜teratail（テラテイル）	NetBeans 8.2 で作ったソフトの実行ファイルはどこでしょう？	https://teratail.com/questions/353300?rss=all	NetBeansで作ったソフトの実行ファイルはどこでしょう前提・実現したいことNetBeansnbspnbspのnbspCnbsp言語で、RaspberrynbspPinbspで動作するソフトを作っています。	2021-08-08 14:13:58
Program	[全てのタグ]の新着質問一覧｜teratail（テラテイル）	WindowsとIphoneでSSH接続はできますか？	https://teratail.com/questions/353299?rss=all	iphone	2021-08-08 14:06:41
Ruby	Rubyタグが付けられた新着投稿 - Qiita	Herokuデプロイ時に "Refile.secret_key was not set" というエラーが出た場合の正しい対処方法	https://qiita.com/jnchito/items/a97f24bab103bfe3ab5a	Railsはすでに、、、とアップデートされていますが、manferefileはRailsでbundleinstallができるようにしただけで、決して最新のRailsで動作確認したわけではありません。	2021-08-08 14:59:25
AWS	AWSタグが付けられた新着投稿 - Qiita	【AWS・EC2】unicornを起動の際のエラー文master failed to start, check stderr log for detailsの解決法・rails6 master.key周りの解決法も	https://qiita.com/KKDDD/items/8339116ec0aa01ee76b9	もっと詳しくいうと、私は以前ローカル環境にあるmasterkey、credentialsymlencを消して、ローカル環境で何回もEDITORvimbundleexecrailscredentialseditをすることによってつのキーを作っては壊しを繰り返してました。	2021-08-08 14:50:33
AWS	AWSタグが付けられた新着投稿 - Qiita	Job for nginx.service failed because the control process exited with error code. See "systemctl status nginx.service" and "journalctl -xe" for details.などのnginx周りのファイルのエラーを知るコマンド	https://qiita.com/KKDDD/items/b53122edf437e901782d	JobfornginxservicefailedbecausethecontrolprocessexitedwitherrorcodeSeequotsystemctlstatusnginxservicequotandquotjournalctlxequotfordetailsなどのnginx周りのファイルのエラーを知るコマンドsudosystemctlstartnginxをしたら次のエラーJobfornginxservicefailedbecausethecontrolprocessexitedwitherrorcodeSeesystemctlstatusnginxserviceandjournalctlxefordetails解決法sudonginxtコマンドを使用するsudonginxtを使用すると細かなミスに気がつくことができます。	2021-08-08 14:49:07
AWS	AWSタグが付けられた新着投稿 - Qiita	AWSデベロッパーアソシエイトに合格しました。	https://qiita.com/t-furusawa/items/7f1a3a587e04be424d10	実際、これを読んでどんな目的のサービスか理解してからAWS公式のドキュメントを読んだりしていました。	2021-08-08 14:48:16
AWS	AWSタグが付けられた新着投稿 - Qiita	AWS CDK ワークショップ for Python の cdk init アナウンス和訳	https://qiita.com/hatahata-note/items/d72b85cb1b22f60af2bc	↑ここでcdkinitした時のアナウンスの内容を残しておきたいなと思ったので、自分のためにも投稿cdkworkshopREADMEmdの内容でもある和訳した文章とコマンドCDKPythonプロジェクトへようこそこのプロジェクトの内容を調べてみてください。	2021-08-08 14:21:03
Docker	dockerタグが付けられた新着投稿 - Qiita	【秒・思考停止】DockerでPostgresqlを導入して動かす方法【Rails6】	https://qiita.com/KKDDD/items/818072f98942fcf5c793	一度dockerを落とすdockercomposedownコンテナ内に入り開発をするためにdockerコンテナを起動するdockercomposeupdpostgresユーザのpasswordを設定するため、dbコンテナの中に入るdockercomposeexecdbbashpostgresユーザのpasswordを設定するrootコンテナidpasswdpostgresNewpasswordセキュリティ上表示されませんaaaaと入力してますRetypenewpasswordセキュリティ上表示されませんaaaaと入力してます更新しましたと返ってくる。	2021-08-08 14:51:58
Docker	dockerタグが付けられた新着投稿 - Qiita	【Docker】WARNING: The POSTGRES_USER variable is not set. Defaulting to a blank string.の解決法	https://qiita.com/KKDDD/items/96d69e1d0d46dd702d0c	dockercomposeupdをしたところ次のエラー。	2021-08-08 14:51:35
Docker	dockerタグが付けられた新着投稿 - Qiita	DockerエラーIs the server running on host "localhost" (127.0.0.1) and acceptingTCP/IP connections on port 5432?の解決法 Dockerの各種削除コマンドも紹介	https://qiita.com/KKDDD/items/66a75ce9223fc543563f	DockerエラーIstheserverrunningonhostquotlocalhostquotandacceptingTCPIPconnectionsonportの解決法Dockerの各種削除コマンドも紹介postgresを使用しています。	2021-08-08 14:50:13
Docker	dockerタグが付けられた新着投稿 - Qiita	Dockerfile、docker-compose.ymlの中身で使われるコマンドや意味の説明	https://qiita.com/KKDDD/items/a1e3e3abfc3833a97ff4	dockercomposehogehogeというコマンドを実行することで、そのファイルから設定を読みこんえ全てのコンテナを起動することができる。	2021-08-08 14:48:36
Docker	dockerタグが付けられた新着投稿 - Qiita	Dockerコンテナネットワークにコンテナの残骸が残ってしまった場合の対処記録	https://qiita.com/robozushi10/items/7e37c195e9a2dd6b915e		2021-08-08 14:38:32
Git	Gitタグが付けられた新着投稿 - Qiita	gitのエラーUpdates were rejected because the remote contains work that you do not have locally. 〜the remote changes (e.g., 'git pull ...') before pushing again.の解決法	https://qiita.com/KKDDD/items/b177abf30eebf63cc735	gitcheckoutbブランチmasterブランチにいる状態で行ってくださいgitpulloriginmastergitaddAgitcommitmメッセージgitpushoriginブランチBgitcheckoutmastergitmergeブランチBgitpushoriginmasterポイントリモートリポジトリのmasterブランチを反映させるためのブランチを作成することが大事。	2021-08-08 14:49:46
Git	Gitタグが付けられた新着投稿 - Qiita	Gitについて一日学び、用語をまとめてみた	https://qiita.com/keichim/items/e3c1f39883df44cf2448	プログラミングについてそれなりに学び、実際に何か作り始める前に、Gitを学んでおけばよかったと感じています。	2021-08-08 14:34:54
Ruby	Railsタグが付けられた新着投稿 - Qiita	Herokuデプロイ時に "Refile.secret_key was not set" というエラーが出た場合の正しい対処方法	https://qiita.com/jnchito/items/a97f24bab103bfe3ab5a	Railsはすでに、、、とアップデートされていますが、manferefileはRailsでbundleinstallができるようにしただけで、決して最新のRailsで動作確認したわけではありません。	2021-08-08 14:59:25
Ruby	Railsタグが付けられた新着投稿 - Qiita	エラーAn error occurred while installing mysql2 (0.5.3), and Bundler cannot continue. Make sure that `gem install mysql2 -v '0.5.3' --source 'https://rubygems.org/'` succeeds before bundling.の解決方法	https://qiita.com/KKDDD/items/7027318c1e2c2309fc61	エラーAnerroroccurredwhileinstallingmysqlandBundlercannotcontinueMakesurethatgeminstallmysqlvxxsourcexxsucceedsbeforebundlingの解決方法何回も忘れるのでメモ。	2021-08-08 14:47:33
Ruby	Railsタグが付けられた新着投稿 - Qiita	rails s 時のエラー「Address already in use - bind(2) for "0.0.0.0" port 3000」の解決法【初心者】	https://qiita.com/KKDDD/items/ac04682fcd4bffacc48a	railss時のエラー「Addressalreadyinusebindforquotquotport」の解決法【初心者】結論別のポートで立ち上げるのが早いrailsspというコマンドを入力すればOKです。	2021-08-08 14:46:09
海外TECH	DEV Community	5 Tips to Master the Art of Clean Code	https://dev.to/ruppysuppy/5-tips-to-master-the-art-of-clean-code-57b6	Tips to Master the Art of Clean CodeGood programmers write boring code Great programmers write really boring codeWhen I came across this quote on the internet sometime in the past year it introduced me to the concept of clean code What is Clean Code exactly In simple terms Clean Code refers to a codebase that is easy to read and understand Some salient features of Clean Code are Reduces cognitive load of the readerContains intuitively named variables and functionsFollows the best practices for coding Why use Clean Code when my code works even without it Glad you asked Clean Code is not about writing code that works it is about writing code that is easy to read and maintain in the long term As you can see from this graph the cost of maintaining a Dirty Code base drastically increases over time whereas in the case of Clean Code it remains fairly constant Clean Code is not the shortest or the smartest looking but it is the elegant code understanding which takes minimal effort Programming is an art as much as it is a science Here are a few tips to help you write Clean Code Intuitive Variable NamesQuite evidently nobody does all the computation mentally to check what a variable stores Example const x n filter e gt e gt Example const positiveElements numbers filter num gt num gt As you can see the second example is far easier to understand than the first one In the case of booleans the variable name should be a question that can be answered with yes or no such asconst isValid false const hasAuthorization true Self Explanatory functionsThere are two things to keep in mind while writing functions or methods Follow the Single Responsibility Principle SRP Function names should be actions words verbs Single Responsibility Principle SRP states that a function should do only one specific task An example of this would be a function that sends data to the server should not validate the data const validate data gt const sendData data gt const submit data gt if validate data return sendData data There are two other good to follow principles Function body should not contain more than levels of nestingA function should take a maximum of arguments Group Similar Functions TogetherWe now come across the concept of Cohesion Cohesion is a measure of the degree to which the elements of the module are functionally related Related functions should be grouped together in a class helping us keep our code compartmentalizedclass IOHelper staticmethod def read data file name string gt None pass staticmethod def write data file name string data Any gt None passHere we find that the IOHelper class only groups together functions for io operations without having any utility of its own Minimize The Number Of CommentsThis might sound counterintuitive for some beginners but hear it out The code you write should be self explanatory anyone viewing your code should not have to rely on comments to understand what it does There are a few rare cases where you might need comments in case there is some unintuitive code without a workaround using setTimeout to avoid race conditionsetTimeout fn Code FormattingThe codebase should always follow a strict set of formatting rules It is also a good idea to use a formatter like black or prettier to automate the formatting The Project Structure should be decided before the commencement of the project and everyone working on it should be aware of it and agree to abide by it as the Project Structure is context dependent and everyone likes a specific structure over another The variables and function naming convention should also be specified beforehand isValid or hasVality etc and language specific cases should be kept in mind eg snake case in python and camel case in JS TS snake case variable value camelCaseVariable value ConclusionAs mentioned earlier as well Clean Code is not the shortest code but it is the easiest to understand Following these principles would help you become a better coder not by improving your coding skills but by improving the soft skills required for coding as it will teach you how to explain your code to non technical people Thanks for readingWant to work together Contact me on UpworkWant to see what I am working on Check out my GitHubI am a freelancer who will start off as a Digital Nomad in mid Want to catch the journey Follow me on InstagramFollow my blogs for weekly new tidbits on DevFAQThese are a few commonly asked questions I get So I hope this FAQ section solves your issues I am a beginner how should I learn Front End Web Dev First get the fundamentals of HTML CSS JS down Learn any front end framework library React Vue Angular Then keep making Projects or make Open Source Contributions to attain mastery Relevant Article Links Front End Project Ideas Get Started With Open SourceWould you mentor me Sorry I am already under a lot of workload and would not have the time to mentor anyone Connect to me on LinkedIn Portfolio Upwork GitHub Instagram	2021-08-08 05:46:04
海外TECH	DEV Community	Database Managment System: Introduction	https://dev.to/kathanvakharia/database-managment-system-introduction-4dmd	Database Managment System IntroductionDatabase Management System DBMS is one of the core subjects in computer science It deals with the storage retrieval modification and deletion of data Your favorite query language SQL plays a vital role here There are lots of interesting things to discuss in this subject it is one of the easiest as well as an important subject The only caveat is that sometimes terminologies used in this subject can be daunting and hard to swallow But worry not I will explain things in the most simple manner possible Let s start with some basic terms that you need to be familiar with Basic Terms DataAny fact that can be recorded or stored eg text numbers images videos etc DatabaseCollection of related data Traditionally a database contains only text and numbers fun fact such databases are called Traditional Database There are different types of databases Multimedia Database to store videos songs etc The best example is Youtube s Database Geographic Information System GIS to store data of interspace recorded by satellites and rockets Realtime Database Databases that need to be updated frequently For example your favorite firebase Database Management System DBMS It a software used to define construct and manipulate data A good analogy database is a book while DBMS is a pen and data is the ink DBMS acts as an intermediary between the application code and the database It ensures specified constraints restrictions by not letting the application directly access the data inside the database Database systemThe terminology is loose in the sense Database system is referred as DBMS usually Database System is Database DBMS For example MySQL PostgreSQL all are database systems Why not an Operating System for all of this A question might arise why do we need DBMS at all We already have O S which does a lot of stuff for us why not this one too Simply putting this will make your system super slow a k a boot times of your system will be horrible The reason is whenever we want to access the database we will ask the operating system which will cause the O S to switch from user mode to kernel mode overhead to make system calls like write read etc This makes the entire process of even the data retrieval super slow	2021-08-08 05:41:21
海外TECH	DEV Community	Differences between Node.js and the Browser	https://dev.to/cleancodestudio/differences-between-node-js-and-the-browser-50i4	Differences between Node js and the BrowserYes the browser and node js both use the JavaScript software language but the literal Run Time Environments are different Node js aka server side JavaScript has many similarities with client side JavaScript It also has a multitude of differences Despite both using JavaScript as their software language we can key in on some key differences that make the software development experience between the two RADICALLY DIFFERENT In today s post we re diving into the differences that separate Node js aka server side JavaScript from the browser aka client side JavaScript From the front end developers vantage point node js comes across as a huge advantage Node js pulls on the power of familiarity and comfort allowing developers to create full stack applications using a software language in JavaScript that they are already familiar with This is huge By using the same language for both ends of the stack you can deeply learn JavaScript and stick to becoming better and better at it without needing to bounce between languages and partition your learning resources into two or more languages on top of everything else software development requires you to learn We re using JavaScript on both sides so what changes What changes between node js and browser side JavaScript is the ecosystem For example in the browser you re Interacting with the DOM Document Object Module Utilizing Web Platform APIs EX Cookies These examples of course don t actually exist within Node The DOM is a representational layer it s a document object module that has been largely inspired by the need to create a visual user interface layer for the web via the power of browsers Node js is server side we don t have a DOM nor do we need Cookies Cookie s are largely implemented to track users or save user information we re on the server side and have direct access to the database or storage resources and are using node js to control the server itself that backs the website this is instead of interacting with the browser that is used to communicate with our website server on the front end In the browser JavaScript won t have access to several clean APIs modules that node has For example in node you re Able to interact and access the the file system fs Another huge difference is that Node js allows you to control the environment itself Unless you re building an open source application that anyone is allowed to build on to and deploy anywhere you know which version of Node js you will be running your application on This is compared to the browser where the environment is based on the browser version You don t have the luxury of defining the environment your visitors will use on the front end On the back end you do and this is very convenient as a developer This means that you can write all the modern ES and so on JavaScript that your Node version supports JavaScript advances as fast as any other software language out there browsers seemingly always a little bit behind the JS curve at least some of the many browsers out there are so you have to wait a bit to use the most up to date JavaScript releases to support compatibility of your application across front end browsers to support all of your visitor s and their experience with your software Since JavaScript moves so fast but browsers can be a bit slow to upgrade sometimes on the web you are stuck with using older JavaScript ECMAScript releases On the browser side you can do a bit of extra leg work to alleviate this browsers are always a bit behind issue by using Babel to transform your code to be ES compatible before shipping it to the browser This requires you to install webpack make sure your using the proper transpiler s and have the correct configuration set up to ultimately reduce your modern JavaScript into an older version of JavaScript so that all browsers can use it On the node js side you don t have to do this You won t need to do this Another difference is that Node js uses the CommonJS module system while in the browser we are starting to see the ES Modules standard being implemented In practice this means you may need to use require in Node while using import within the browser but this looks to be changing standardizing in the future What is Node jsNode js is a JS runtime based on chrome s JavaScript engine called V In simple terms the V JS engine from chrome was extracted and using it a new technology has been made to run standing alone Of course there s a lot more that goes into something like this As stated earlier this is no DOM there is no User Interface and there are runtime differences Installing Node js vs Browser JSLike Python or PHP you actually have to install Node js for it to work properly on your machine You can install node js here Node js is supported on all major Operating systems Windows Mac Ubuntu etc On the other side you have the browser What s it look like installing JavaScript into the Browser The answer is it doesn t look like anything The browser is responsible for being able to use interpret and run JavaScript you don t install it it comes with the browser Running Node js vs Browser JavaScriptOnce installed like PHP python or any other server side language node js can be run directly through the command line or terminal You can call a JavaScript file by executing node file path js via your terminal or command line This works just like you re running PHP or Python from the terminal You can call the file using node file path js or simply type in node and enter into an interactive REPL cmd gt node test js cmd gt hello world cmd gt cmd gt nodenode gt console log hello world node gt hello world node gt exitcmd gt On the browser side this of kind of direct execution of JavaScript file and or terminal REPL environment doesn t work You have the browser console accessible via the inspection tool but this browser console doesn t actually let you call JavaScript files to be executed directly nor give you a REPL to directly interact with server machine resources You don t have the ability to directly call a JS file and execute it s functionality from the browser You need to load the JS file into an HTML document and then allow the browser to pull the source code and ultimately run the JavaScript System AccessThe browser sandboxes JavaScript for your safety Node js provides developers with full access to the system like any other native application This means node js can read and write directly to and from the file system has unrestricted access to the network and can execute software installed on the machine This also means that you must treat node js with more caution you re not sand boxed you can do all the things With great power comes great responsibility Global vs WindowIn browser side JS we have the window object This is the upmost parent object in front end client side JS In server side JS we have the global object This is the most publicly globally accessible object in node js Similarities between Node js and Browser side JSBoth have a single thread for running JavaScriptBoth use the Event Queue Lookup Event loop for further details Both are non blockingBoth have sync and asyn capabilities Both use exceptions flow and scoping identically	2021-08-08 05:40:30
海外ニュース	Japan Times latest articles	Japan’s miracle run ends in final as U.S. wins women’s basketball gold	https://www.japantimes.co.jp/sports/2021/08/08/olympics/summer-olympics/olympic-basketball/japan-us-women-basketball/	akatsuki	2021-08-08 14:24:55
ニュース	BBC News - Home	Tokyo Olympics: Team GB to match London 2012 with 65 medals won	https://www.bbc.co.uk/sport/olympics/58125822	total	2021-08-08 05:11:31
ニュース	BBC News - Home	Tokyo Olympics: Jason Kenny wins seventh gold but Laura Kenny reign as omnium champion over	https://www.bbc.co.uk/sport/olympics/58133154	Tokyo Olympics Jason Kenny wins seventh gold but Laura Kenny reign as omnium champion overJason Kenny becomes the first Briton to win seven Olympic golds by defending his keirin title but wife Laura s reign as women s omnium champion has ended	2021-08-08 05:42:11
ニュース	BBC News - Home	Ireland's Harrington wins Olympic boxing gold	https://www.bbc.co.uk/sport/olympics/58130534	light	2021-08-08 05:23:19
ニュース	BBC News - Home	UFC 265: Ciryl Gane stops Derrick Lewis to capture interim heavyweight title	https://www.bbc.co.uk/sport/mixed-martial-arts/58135177	UFC Ciryl Gane stops Derrick Lewis to capture interim heavyweight titleCiryl Gane becomes the first French fighter to capture a UFC world title by winning the interim heavyweight title at UFC on Saturday night	2021-08-08 05:53:44
北海道	北海道新聞	田中亮明「爪痕残したかった」　ボクシング、並木月海も喜び	https://www.hokkaido-np.co.jp/article/576332/	並木月海	2021-08-08 14:04:00