投稿時間:2023-05-05 14:09:17 RSSフィード2023-05-05 14:00 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
ROBOT	ロボスタ	慶應大/名工大/オリィ研が新たなサイバネティック・アバター「分身ロボットカフェ」実証実験 拡張アバター接客や遠隔共創トッピングなど	https://robotstart.info/2023/05/05/cybernetic-avatar-dawn.html		2023-05-05 04:21:15
ROBOT	ロボスタ	ANA発アバター事業のスタートアップavatarin、DBJと三菱UFJを引受先とする20億円の資金調達　中核の「アバターコア」とは	https://robotstart.info/2023/05/05/avatarin-avatarcore.html		2023-05-05 04:07:53
IT	ITmedia 総合記事一覧	[ITmedia News] Gmailに“青いチェックマーク”（Twitterとは無関係）	https://www.itmedia.co.jp/news/articles/2305/05/news053.html	gmail	2023-05-05 13:35:00
AWS	AWS - Webinar Channel	Analytics in 15: Improve Search Relevance with Amazon OpenSearch Service	https://www.youtube.com/watch?v=250XQDcX30s	Analytics in Improve Search Relevance with Amazon OpenSearch ServiceAdvancements in search relevance help support business s data needs such as log analytics real time application monitoring website search and more In this minute session you ll learn how businesses are leveraging improved search functionality to realize benefits and improvements in their data and document search capabilities better supporting their own business needs and the needs of their customers	2023-05-05 04:21:06
Ruby	Rubyタグが付けられた新着投稿 - Qiita	Example title	https://qiita.com/AiOnaga/items/d9e5d595151207245d2b	example	2023-05-05 13:24:42
Ruby	Rubyタグが付けられた新着投稿 - Qiita	Example title	https://qiita.com/nchaaa/items/6cc281bd985ffa5e5904	example	2023-05-05 13:24:41
海外TECH	DEV Community	The best TRAIT of RUST 🔥 (no pun intended)	https://dev.to/cleggacus/the-best-trait-of-rust-no-pun-intended-2516	The best TRAIT of RUST no pun intended IntroductionSo your friend can t stop about how they use Rust Perhaps they ve mentioned how it s safe has great memory management or how its BLAZINGLY fast Although this is clearly true there is another great reason to use rust its use of traits Never heard of traits well its your lucky day What is a trait Do you remember when you first learnt inheritance and it seamed like this amazing idea So you create an animal class that allows for a noise method and an eat method You then you create a cat and a dog who have these methods You then want a robot who speaks but doesn t eat Well now you need a speaker class that the animal class extends and the robot class extends Suddenly when you realize that the cat and the robot both need to catch mice you find yourself struggling to figure out what to do Everything you were promised about inheritance seems like a lie Fortunately there is another approach to this problem called composition Instead of a cat being an animal a cat is an entity composed of the traits speaker eater and mouse hunter The robot is composed of the speaker and mouse hunter traits With composition you can create more flexible and reusable code that adapts to different contexts This is why traits are super useful in rust Now you are probably thinking that this already exists in other languages like java and c But there are a few nifty tricks that traits have in rust that do not exist in these other languages We will see them a bit later The Vector ExampleAn example that I personally think shows off traits the most is vectors The math kind not the array kind Creating a Vec StructLets first define a Vec struct with a generic type for the x and y attributes struct Vec lt T gt x T y T PrintingNow in our main lets create a Vec and print it fn main let v Vec x y println v You will quickly realize this doesn t work when the compiler throws the error doesn t implement std fmt Display This happens because the Display trait must be implemented for the type that you are printing A quick solution to this will be to print using the Debug trait instead This is because unlike the Display trait you can derive the Debug trait This essentially a macro or code generated at compile time that will automatically implement the trait for you This can be done by adding derive Debug Copy Clone above the struct Note is used for debug in the print macro derive Debug struct Vec lt T gt x T y T fn main let v Vec x y println v Implementing traits for existing typesSo now lets say we want to be able to convert an i bit integer to a Vec One way we can do this is by creating a ToVec trait that must derive a to vec function trait ToVec lt T gt fn to vec amp self gt Vec lt T gt impl ToVec lt i gt for i fn to vec amp self gt Vec lt i gt Vec x self y self This now means we can call the method to vec on any variable with the i type This is something that interfaces cannot do in other languages and why traits are so powerful in rust We can now modify the main function to show this working in action fn main let v Vec x y let v to vec println v v Operation overloadingAnother use case for traits is operation overloading This is where you have a struct or class and wish to allow the user to use an operator such as to add the two values together Lets now implement the Add trait for Vec To do this we will first need to insure that the generic used for x and y also have this trait so they can be added to the other vectors x and y values There are types of syntax we can use for this The first way is to add a bound in the angle brackets This is good for when your adding one or two traits use std ops Add derive Debug struct Vec lt T Add gt x T y T But lets say we wish to have multiple traits In this case lets add the Copy and Clone traits too We can now use the where keyword as follows use std ops Add derive Debug struct Vec lt T gt where T Add Clone Copy x T y T We need to also make sure that these bounds exist on the ToVec trait since it also uses this generic trait ToVec lt T gt where T Add Clone Copy fn to vec amp self gt Vec lt T gt Now we need to implement Add for Vec To do this we will need to define the output type of type Vec and also we need to make sure the Add bound for T is Add since The output of the addition must also have the traits required for a Vec impl lt T gt Add for Vec lt T gt where T Add lt Output T gt Clone Copy type Output Vec lt T gt fn add self rhs Self gt Self Output Vec x self x rhs x y self y rhs y Before we test this me need to make sure that Vec also derives the Copy and Clone to prevent issues related to borrowing derive Debug Clone Copy struct Vec lt T gt Finally we can test if the addition works by updating our main function fn main let v Vec x y let v to vec let v v v println v v v IT WORKS ChallengeTry and implement more operations for this struct and implement the ToVec trait for more types If you would like to do your own further reading maybe try to replace the ToVec for the Into and From traits ConclusionWe ve explored the issues with inheritance and how trait based composition can help this by using rust We ve looked at how traits are derived used for operation overloading and implemented for already existing types Hopefully this is a compelling reason to use fast apart from its BLAZINGLY FAST performance Thanks for reading P S If you share comment and like this post I will show how we can one up this Vec struct with macros to do the work for us	2023-05-05 04:30:44
海外ニュース	Japan Times latest articles	Member of riot squad dies in an apparent suicide at Prime Minister’s Office	https://www.japantimes.co.jp/news/2023/05/05/national/prime-ministers-office-apparent-suicide/	Member of riot squad dies in an apparent suicide at Prime Minister s OfficeThe officer appeared to have taken his own life with the gun he was carrying an official at the Metropolitan Police Department s Kojimachi Police Station	2023-05-05 13:32:55
海外ニュース	Japan Times latest articles	On Africa trip, Kishida fails to gain full support over Ukraine	https://www.japantimes.co.jp/news/2023/05/05/national/kishida-japan-ukraine-africa-tour/	wheat	2023-05-05 13:31:52
ニュース	BBC News - Home	Local elections 2023: Conservatives suffer early local election losses	https://www.bbc.co.uk/news/uk-politics-65485099?at_medium=RSS&at_campaign=KARANGA	councils	2023-05-05 04:57:07
ビジネス	東洋経済オンライン	会話が苦手な人でも何とかなる｢質問メモ活用法｣ 相手を知れば話が楽に､ただしやり過ぎに注意 | リーダーシップ・教養・資格・スキル | 東洋経済オンライン	https://toyokeizai.net/articles/-/668040?utm_source=rss&utm_medium=http&utm_campaign=link_back	東洋経済オンライン	2023-05-05 14:00:00