投稿時間:2022-07-18 15:08:46 RSSフィード2022-07-18 15:00 分まとめ(13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
js	JavaScriptタグが付けられた新着投稿 - Qiita	【Rails6.1.6】「日記機能」にGoogle Mapsを実装する（投稿確認画面 付）	https://qiita.com/pomusuke36/items/3fc6208628cbfe501686	googlemaps	2022-07-18 14:45:37
Linux	CentOSタグが付けられた新着投稿 - Qiita	誰でもLinuxの仮想環境を構築できる超簡単な方法	https://qiita.com/sai3308/items/4b4ab2abf05fd406d2a7	linux	2022-07-18 14:43:55
技術ブログ	Developers.IO	ทดสอบสร้าง Project Laravel 9	https://dev.classmethod.jp/articles/try-to-build-project-laravel-9/	ทดสอบสร้างProject Laravel ครั้งนี้ผมจะมาทดสอบสร้างProject Laravel โดยสร้างเป็นระบบหน้าบ้าน หลังบ้านเล็กๆในรูปแบบModel View Control	2022-07-18 05:50:00
海外TECH	DEV Community	What is the significance, and what are the benefits, of including 'use strict' at the beginning of a JavaScript source file?	https://dev.to/anewman15/what-is-the-significance-and-what-are-the-benefits-of-including-use-strict-at-the-beginning-of-a-javascript-source-file-5c5l	What is the significance and what are the benefits of including x use strict x at the beginning of a JavaScript source file In JavaScript the use strict statement allows us to choose strict mode to write and execute our code Normal JS is very beginner friendly It tolerates semantic errors by remaining silent about them which can result in unnoticed bugs It does a lot of heavy lifting for mapping variables with their identifiers by checking the scope chain for each name which costs time and memory It makes life easier by treating the parameter values set at function definition to be the same as the values passed to the function at invocation as items of the arguments object which can sometimes render actual passed in values unimportant It autoboxes the this value of a function and exposes the Function prototype caller and Function prototype arguments APIs that gives access to the caller function and arguments object respectively All of these three poses security concerns Strict ModeStrict mode addresses these issues and brings about changes to give developers more control over their code The changes can be classified into four catergories Below we briefly discuss some of them in each category For detailed explanation and code examples please refer to this excellent MDN article Changes related to mistakes arising from syntax and type conversionMistakes related to syntax and type conversion throw errors instead of silently ignoring them There are several of them For example mistyped variables throw ReferenceError Assignment to a non writable global like undefined or NaN throw a TypeError Please refer to this section of the MDN Strict Mode article for more examples Changes related to variable usageVariable name mapping is optimized by prohibiting the use of with eval can introduce new variables in it s own enclosed scope only not in the surrounding global scope Deleting declared variables is not allowed Changes related to eval and arguments objecteval and arguments object are made easier to work with They are treated like other pre assigned language keywords and cannot be used to name variables and functions arguments object of a function is set only when the function is invoked So setting a value for an argument in the function definition does not update the arguments object and updating an item in the arguments object with arguments i Something not necessarily a string does not change the value of the corresponding parameter variable Changes related to securityWritten code is made more secure by preventing autoboxing of this undefined and null values of this do not autobox to the Global object Function prototype caller and Function protoype arguments throw TypeError so this prevents traversing the call stack making strict mode code more secure ReferencesStrict ModeWhat does use strict do in JavaScript and what is the reasoning behind it	2022-07-18 05:08:18
ニュース	BBC News - Home	UK heatwave: Country may have hottest day on record with 41C forecast	https://www.bbc.co.uk/news/uk-62201793?at_medium=RSS&at_campaign=KARANGA	wales	2022-07-18 05:53:26
ニュース	BBC News - Home	Yusuf Zahab: Australian teen feared killed in Syrian jail	https://www.bbc.co.uk/news/world-australia-62173775?at_medium=RSS&at_campaign=KARANGA	australia	2022-07-18 05:48:33
ニュース	BBC News - Home	European bison arrive near Canterbury to manage woodland	https://www.bbc.co.uk/news/uk-england-kent-62164223?at_medium=RSS&at_campaign=KARANGA	blean	2022-07-18 05:15:04
ニュース	BBC News - Home	World Athletics Championships: Dina Asher-Smith fourth as Shelly-Ann Fraser-Pryce wins women's 100m title	https://www.bbc.co.uk/sport/athletics/62202367?at_medium=RSS&at_campaign=KARANGA	World Athletics Championships Dina Asher Smith fourth as Shelly Ann Fraser Pryce wins women x s m titleShelly Ann Fraser Pryce wins a record fifth women s m world title in a Jamaican clean sweep of the medals as Dina Asher Smith finishes fourth	2022-07-18 05:22:25
ニュース	BBC News - Home	World Athletics Championships: Katarina Johnson-Thompson sixth after first day of heptathlon	https://www.bbc.co.uk/sport/athletics/62200718?at_medium=RSS&at_campaign=KARANGA	World Athletics Championships Katarina Johnson Thompson sixth after first day of heptathlonGreat Britain s Katarina Johnson Thompson is in sixth place after four events as she tries to retain her heptathlon world title in Oregon	2022-07-18 05:35:43
北海道	北海道新聞	毛利衛さん、宇宙初飛行から３０年　余市で特別展	https://www.hokkaido-np.co.jp/article/707087/	宇宙記念館	2022-07-18 14:29:45
北海道	北海道新聞	はやぶさ２「実物大の迫力、体験を」　小樽市総合博物館が模型展示	https://www.hokkaido-np.co.jp/article/707086/	小樽市総合博物館	2022-07-18 14:27:41
北海道	北海道新聞	カヌーで天塩川下り　３年ぶり「ダウン・ザ・テッシ」	https://www.hokkaido-np.co.jp/article/707074/	美深	2022-07-18 14:14:38
北海道	北海道新聞	西日本で大雨、災害警戒　前線影響、２０日にかけ	https://www.hokkaido-np.co.jp/article/707015/	非常に激しい雨	2022-07-18 14:12:07