投稿時間:2023-04-08 18:12:03 RSSフィード2023-04-08 18:00 分まとめ(11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
python	Pythonタグが付けられた新着投稿 - Qiita	PythonでSQLiteに接続してみた	https://qiita.com/wooooo/items/2dd16aa859ea81525849	dbbrowserforsqlite	2023-04-08 17:33:39
python	Pythonタグが付けられた新着投稿 - Qiita	Go, Python, C# などで配列の一部を取り出す	https://qiita.com/Nabetani/items/cd65d54953459d83ba33	gopythonc	2023-04-08 17:15:56
js	JavaScriptタグが付けられた新着投稿 - Qiita	C#とJavaScriptの連携	https://qiita.com/1noseA/items/2f530226f15c2c488136	javascript	2023-04-08 17:36:35
Docker	dockerタグが付けられた新着投稿 - Qiita	Nextcloud with Apache2 + PostgreSQL on Docker	https://qiita.com/NeK/items/e3954e87bb5d55e5c5a5	apache	2023-04-08 18:00:06
golang	Goタグが付けられた新着投稿 - Qiita	Go, Python, C# などで配列の一部を取り出す	https://qiita.com/Nabetani/items/cd65d54953459d83ba33	gopythonc	2023-04-08 17:15:56
海外TECH	DEV Community	Rust Tips and Tricks #PartOne	https://dev.to/danmugh/rust-tips-and-tricks-partone-1ic4	Rust Tips and Tricks PartOneRust is a programming language that has gained a reputation for its exceptional qualities in terms of reliability speed and overall enjoyment for the programmer However it is important to keep in mind that Rust is also recognized as a language with a relatively high level of complexity As programmers when we start using a new language we tend to apply the concepts and techniques we have learned from our previous language experiences Initially we may not be familiar with the idiomatic way of writing code nor the efficient shortcuts that the new language offers Nevertheless we manage to make progress by experimenting with the code until it runs and compiles This is perfectly natural Over time by seeing other people s code we learn we adapt and we write better code This post tries to speed up that process by showing you some of the Rust shorthands I have discovered so far Avoid unnecessary clonesWhen a variable is cloned using the clone method its data is duplicated which requires additional resources As a result clones typically have a detrimental impact on performance and should be used sparingly In many cases it is possible to pass references to the same variables to different functions eliminating the need for cloning For example Using Cow as return typeOccasionally you may need to write methods that accept a string slice amp str as input and possibly return either an altered version of the input or the original string In such situations the Cow type can prove to be useful since it allows you to avoid allocating new memory unnecessarily By using Cow you can modify the input string when needed but if no changes are required the original string can be returned without incurring any additional memory allocation costs Enum size is bounded by the largest memberTo ensure that an Enum can accommodate its largest variant its size is determined accordingly To optimize memory usage it is advisable to keep the variants within an Enum of similar sizes However if necessary larger variants can be boxed Consider this example Using dbg macro instead of println The dbg macro can be used to print the value as well as the source code of an express to stderr Example usage The above code will print src main rs var Output src main rs var Crossbeam channels instead of the standard onesThe crossbeam crate offers a powerful alternative to standard channels with support for the Select operation timeouts and more Customize and chain Panic handlersPanic handlers called hooks can be overridden and chained which becomes particularly useful when setting up custom error reporting and logging for your application Output custom error reporting logic panicked at test src main rs custom logging logic panicked at test src main rs The standard swap functionThe swap function allows you to directly swap two variables without needing to create a temporary variable Use impl Trait when working with ClosuresWhen passing a closure to a function it is generally better to use the “impl Fn FnOnce FnMut approach instead of a generic one This approach also known as “impl Trait helps keep the function s signature uncluttered In more complex scenarios however you may need to box the closure with “Box to make it work It is essential to keep in mind that boxing a closure can introduce additional overhead which may be undesirable in some cases Therefore it is important to weigh the benefits and drawbacks of each approach and choose the one that best suits your requirements Output setting up Action tearing down Clippy and rustfmtThey are two of my favorite Rust tools If you haven t tried them yet I highly recommend giving them a try Clippy can detect various lints in your code and guide you towards writing more idiomatic code To install Clippy simply run rustup component add clippy and to run it within your workspace execute cargo clippy For more details visit Clippy s GitHub repository Rustfmt is a tool that formats Rust code in compliance with style guidelines Its name precisely reflects its purpose To install rustfmt you can run rustup component add rustfmt Once installed you can execute cargo fmt to format Rust code in your workspace If you require further information you can visit rustfmt s GitHub repository Simplify Your Rust Error Handling with “thiserror and “anyhow When it comes to handling errors in Rust it is often best to use the “thiserror and “anyhow crates for an idiomatic approach “Thiserror is useful when the consumer of the error needs to take action based on specific error conditions CONCLUSIONRust is a programming language with immense potential and it has something new to offer every day I hope that this post has provided you with valuable insights into Rust and helped you learn something new If you have any questions or want to share your thoughts please feel free to leave a comment or reach out to me Let s continue to explore the vast possibilities of Rust together Follow me on Twitter amp Linkedin Kindly subscribe for my upcoming articles	2023-04-08 08:21:58
ニュース	@日本経済新聞 電子版	壁紙・内窓・ドアノブ　予算10万円からの簡単リフォーム https://t.co/GcF1UKHkpp	https://twitter.com/nikkei/statuses/1644615551577387008	簡単	2023-04-08 08:17:57
ニュース	@日本経済新聞 電子版	【日経特報】北朝鮮制裁逃れ疑惑の船、日本入港3年で38回　監視に穴 https://t.co/eFtzqGPUNs	https://twitter.com/nikkei/statuses/1644611252940066816	北朝鮮制裁	2023-04-08 08:00:52
海外ニュース	Japan Times latest articles	China sends 42 warplanes near Taiwan as military drills kick off	https://www.japantimes.co.jp/news/2023/04/08/asia-pacific/china-military-drills-taiwan-tsai-ing-wen/	China sends warplanes near Taiwan as military drills kick offThe three days of exercises and combat readiness patrols around the island began Saturday just days after Taiwanese President Tsai Ing wen s meeting with the U S	2023-04-08 17:05:12
海外ニュース	Japan Times latest articles	Missing SDF chopper had normal radio communications before vanishing	https://www.japantimes.co.jp/news/2023/04/08/national/sdf-military-helicopter-search/	Missing SDF chopper had normal radio communications before vanishingThe search continued Saturday as the hunt shifted its focus to the seabed with at least part of the helicopter thought to have sunk to	2023-04-08 17:23:28
ニュース	BBC News - Home	Tel Aviv: One tourist killed and seven wounded in car-ramming attack	https://www.bbc.co.uk/news/world-middle-east-65217134?at_medium=RSS&at_campaign=KARANGA	israeli	2023-04-08 08:44:50