投稿時間:2023-02-26 16:07:23 RSSフィード2023-02-26 16:00 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）	NFTで鍵を解除！ 認証デバイス「BCL-QR1」にNFTチェックイン機能実装	https://techable.jp/archives/197413	bclqr	2023-02-26 06:00:40
python	Pythonタグが付けられた新着投稿 - Qiita	PythonでWebAPIの呼び出し方を複数紹介します	https://qiita.com/wooooo/items/fb7292ed0adee726bd37	apifootball	2023-02-26 15:59:02
python	Pythonタグが付けられた新着投稿 - Qiita	Sentinel-2画像の切り取りと可視化	https://qiita.com/Kaix/items/ef694c997d149c22eb57	sentinel	2023-02-26 15:29:58
python	Pythonタグが付けられた新着投稿 - Qiita	Djangoスタートアップ（staticファイル編）	https://qiita.com/Kate941-su/items/7ba6b0743c4710b1b50a	otherappcs	2023-02-26 15:25:01
python	Pythonタグが付けられた新着投稿 - Qiita	【Python】Python3.0チートシート	https://qiita.com/DisneyAladdin/items/2b37e632011fab95d82a	startnan	2023-02-26 15:20:56
AWS	AWSタグが付けられた新着投稿 - Qiita	[AWS ECS] FargateとELBを使ってWebサイトを公開する	https://qiita.com/K5K/items/2bab270b8fad24505303	qiita	2023-02-26 15:20:24
golang	Goタグが付けられた新着投稿 - Qiita	Go: gorm で MariaDB のバージョンを表示	https://qiita.com/ekzemplaro/items/3f174eff33ada20dab5f	gormversiongo	2023-02-26 15:38:26
Git	Gitタグが付けられた新着投稿 - Qiita	Git, Githubをとりあえず使えるようになる	https://qiita.com/ryutarom128/items/72b39f56f64b1de8c210	gitgithub	2023-02-26 15:31:11
海外TECH	DEV Community	Borrowing and Referencing in Rust	https://dev.to/danmugh/borrowing-and-referencing-in-rust-1egd	Borrowing and Referencing in RustBorrowing and Ownership are intimately related concepts that play a vital role in memory management in Rust Therefore comprehending borrowing is crucial for working effectively in Rust In order to maintain memory safety Rust uses a borrow checker to enforce its ownership rules The ownership rules dictate how Rust manages memory over the stack and heap Most of the time we d like to access some data without taking ownership over it To accomplish this Rust provides a borrowing mechanism Instead of passing objects by value T objects can be passed by reference amp T In this Rust tutorial we will learn how to borrow a value temporarily from its owner which allows us to have multiple references to that value without breaking ownership We ll also learn about referencing the memory address of a value and how to get the value at that address with the dereferencing operator What is Borrowing If we want to use a value in a function without transferring ownership to the function we can borrow the value temporarily from its owner When the function is done with the value it s given back to the owner Borrowing allows us to have one or more references to a single value without breaking the “single owner concept When we borrow a value we reference its memory address with the amp operator A reference in Rust is an address that is passed to a function as an argument OutputInside print vector function Printing the value from main v Mutable ReferencesA function can modify a borrowed resource by using a mutable reference to such resource A mutable reference is prefixed with  amp mut Mutable references can operate only on mutable variables The main  function passes a mutable reference of the variable name to the display  function The display function appends an additional string to the original name variable Outputparam name value is HelloThe value of name after modification is Hello World Borrow and Reference a value from variableIn Rust the memory address of a value can be referenced using the amp operator To understand this concept better let s take a look at an example In the example above the variable a is the owner of the String Hello If we use the variable in a function it will pass ownership to the function In this case we don t want that so the solution is to reference the owner a instead In the parameter list of the function definition we add the amp parameter before the type to tell Rust that the value coming in will be a reference to a value not the actual value The function only borrows the value and gives it back after the function completes its execution When we call the function we have to add the amp operator again this time in front of the value that we pass ConclusionUnderstanding Ownership and Borrowing is crucial for writing efficient and memory safe Rust code that compiles and runs without errors Failure to adhere to the ownership rules will be detected by the borrow checker requiring you to modify your code to make it memory safe before Rust will compile it The borrow checker is annoying when you re new to Rust But as you write more Rust code you ll get used to it and gain experience on writing memory safe Rust code Follow me on Twitter amp Linkedin Kindly subscribe for my upcoming articles	2023-02-26 06:25:45
海外TECH	DEV Community	animtion n canvas	https://dev.to/nagvanshi9275/animtion-n-canvas-l29	animtion	2023-02-26 06:08:45
海外ニュース	Japan Times latest articles	Kishida rallies LDP members ahead of April local elections	https://www.japantimes.co.jp/news/2023/02/26/national/politics-diplomacy/kishida-ldp-april-elections/	imperial	2023-02-26 15:32:44
ニュース	BBC News - Home	Dilbert comic strip dropped by US media over creator's racist tirade	https://www.bbc.co.uk/news/world-us-canada-64775250?at_medium=RSS&at_campaign=KARANGA	black	2023-02-26 06:03:10