投稿時間:2022-06-17 06:17:44 RSSフィード2022-06-17 06:00 分まとめ(20件)

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AWS	AWS Management Tools Blog	Deploying highly-available SQL Server on Amazon EC2 Dedicated Hosts	https://aws.amazon.com/blogs/mt/deploying-highly-available-sql-server-on-amazon-ec2-dedicated-hosts/	Deploying highly available SQL Server on Amazon EC Dedicated HostsWant to bring your eligible SQL Server licenses to use on AWS If your organization is planning data center evacuation and looking to extend the life of existing investments in Microsoft SQL Server and Windows Server licenses Amazon Elastic Compute Cloud Amazon EC and AWS License Manager can help Do you also want to setup …	2022-06-16 20:07:42
海外TECH	Ars Technica	Astronomers reveal the most detailed map of the asteroid Psyche yet	https://arstechnica.com/?p=1861297	asteroid	2022-06-16 20:56:29
海外TECH	MakeUseOf	Master the Basics of Google Sheets: The Ultimate Guide	https://www.makeuseof.com/master-basics-of-google-sheets/	browser	2022-06-16 20:30:14
海外TECH	DEV Community	Compilers, and how to write one !	https://dev.to/triyanox/compilers-and-how-to-write-one--26ga	Compilers and how to write one Hello and welcome to a new blog post Today we will talk about compilers and how you can write one in Rust Programming LanguagesThere is two types of programming languages complied and interpreted Programs written in compiled languages need to be compiled before they can be run as a binary on a computer andprograms written in interpreted languages are run directly on a computer by using a just in time compilation JIT Examples of compiled languages are C C Java C Go etc Examples of interpreted languages are Python Ruby JavaScript etc CompilersThe compiler is just a program that takes a human readable programming language and converts it to machine code to beunderstandable by the computer we all know that the computer can only understand zeros and ones so how the compileractually works LLVMYou may have heard of LLVM which is a tool that simplifies the process of making compilers it s written in C and provides a collection of modular and reusable compiler and toolchain technologies LLVM is a middle layers of a complete compiler system taking intermediate representation IR code from a compiler and emitting an optimized IR This new IR can then be convertedand linked into machine dependent assembly language code for a target platform In this article I m not going to talk about LLVM instad we will talk about the fondamental of compilers and I will provide some examples of how to write some part of a compiler in Rust The compilerA simple compiler can be broken down into main parts A Parser or Lexer A TransformerA Code Generator The ParserThe parser is the part of the compiler that tokenize the code and convert it to a list of tokens The Tokenzation or Lexical Analysis is the process of breaking down a program into a list of tokens each token is a small single unit ofcode that the compiler can understand for example here is a simple Rust program fn main println Hello world This is a simple Rust program it has a function named main and inside the function there is a println macro that prints the string Hello world to the console After the tokenzation the program will be broken down into a list of tokens fn is a function keyword main isthe name of the function and the parentheses are the opening and closing parentheses of the function theopening curly brace the closing curly brace println is the println macro and the parentheses arethe opening and closing parentheses of the macro After tokenizing the code the parser will convert the list of tokens into a tree of nodes called an Abstract Syntax Tree AST which is an abstract representation of the code this step called Syntactic Analysis The AST of the program above will look something like this like this AST kind Program children AST kind Function children AST kind Identifier value main children AST kind Block children AST kind Println children AST kind String value Hello world children The TransformerAfter parsing the code we will have an AST but the AST is not enough to be understood by the computer it s alsoa deeply nested structure so we need to transform the AST into a more readable structure called a Syntax Tree The Transformer can be broken down into main parts or functions TraversersVisitorsThe Traversers are functions that traverse the AST in a depth first maner For example in the above AST the Traverser will apply the function to the root node which is the Program node thenit will apply the function to the children of the Program node and so on until it reaches the last child A Traverser function can be implemented by using the Visitor pattern which is a pattern that allows you toimplement a function that works on a node and its children and then apply the function to the node and its children The Visitors usually are objects with methods that accapt a node and return a value Let s implement a simple Transformer that takes an AST and transform it into a syntax tree by passing it to a Traverser this is a simple example to explain the visitor patternuse std collections HashMap struct Visitor nodes HashMap lt String String gt struct Traverser visitor Visitor struct Node kind String children Vec lt Node gt impl Visitor fn new gt Visitor Visitor nodes HashMap new fn visit amp mut self node amp Node self nodes insert node kind clone node kind clone for child in amp node children self visit child return self nodes impl Traverser fn new gt Traverser Traverser visitor Visitor new fn traverse amp mut self node amp Node self visitor visit node struct SyntaxTree kind String body Vec lt Node gt fn Transformer AST amp AST gt SyntaxTree let mut syntax tree SyntaxTree kind Program to string body Vec new let mut traverser Traverser new let ast context traverser visitor visit AST syntax tree body ast context clone return syntax tree The Code GeneratorThe Code Generator is the part of the compiler that generate the machine code from the syntax tree the code generator call it s self recursively to generate the code from the syntax tree into one singlestring this string is the machine code Here is an example of how you can implement the code generator function in Rust fn generate code syntax tree amp SyntaxTree gt String let mut code String new match syntax tree kind as str Program gt for child in amp syntax tree body code push str amp generate code child Function gt code push str fn code push str amp syntax tree body kind code push str for child in amp syntax tree body body code push str amp child kind code push str code pop code pop code push str n for child in amp syntax tree body body code push str amp generate code child code push str n Block gt for child in amp syntax tree body code push str amp generate code child Println gt code push str println code push str amp syntax tree body kind code push str n String gt code push str code push str amp syntax tree body kind code push str Identifier gt code push str amp syntax tree body kind gt code push str lt unknown gt return code After implementing the parser the transformer and the code generator you can use compositionto tie everything together and here we go you made your own compiler ConclusionCompiler are very essential tools in programming they re been arround forever you don t need toknow how to write a compiler but learning how compilers work helps you understand your tools better Usful LinksThe CompilerLLVM	2022-06-16 20:23:23
Apple	AppleInsider - Frontpage News	Apple's iOS 16 lets you remove 30 stock apps	https://appleinsider.com/articles/22/06/16/apples-ios-16-lets-you-remove-29-stock-apps?utm_medium=rss	Apple x s iOS lets you remove stock appsApple is increasing the number of pre installed iPhone apps that can be removed with the beta of iOS now allowing to be deleted As Apple releases the first beta of iOS developers have been finding what unannounced new features are being added ーand now removed After some years of increasing how many of its own apps can now be removed Apple s iOS brings the total to The iOS apps that can be removed may change over the course of the beta though it s likely the total will either increase or stay the same Read more	2022-06-16 20:53:38
海外TECH	Engadget	Pew confirms what we already knew: People like to retweet political hot takes	https://www.engadget.com/a-third-of-tweets-from-us-adults-are-political-pew-study-finds-205358525.html?src=rss	Pew confirms what we already knew People like to retweet political hot takesWhile it s no secret that social media shapes our political discourse a new study by the Pew Research Center reveals to what extent Nearly one in three tweets posted by American adults are political in nature according to Pew s analysis of a sample of a year s worth of English language tweets from US adults But only eight percent of the original tweets Pew analyzed were political in nature while more than percent of retweets and quote tweets were classified as political This shows that users are a lot more likely to share political content from a small group rather than create their own It s important to note that the study analyzed tweets that were posted between May and May ーa particularly tumultuous time period that included a US presidential election a summer of political protests a pandemic and the January insurrection It s a significant uptick from when only percent of US tweets were about politics But Pew also significantly changed its methodology from which only focused on politics at the national level “This definition excluded mentions of state or local politics and politicians as well as discussions of policy issues and current events that carry a political valence but do not explicitly reference national political figures or groups wrote Pew s researchers in a blog post Still the findings include some interesting insights on who shapes political debate on Twitter and how First off the study found that Americans who were years and older produced percent of all political tweets While this age group only makes up a quarter of Twitter s US user base it virtually dominates the political discussion on the platform Meanwhile only seven percent of tweets from US Twitter users between the ages of and were political in nature As mentioned earlier a large chunk of retweets and quote tweets are political in nature ーsuggesting that most users spread political information on Twitter rather than post original commentary Roughly percent of retweets and percent were quote tweets were political in nature as opposed to eight percent of original tweets Many users voice their political opinions in the replies ーan estimated percent of reply tweets discussed politics nbsp Republicans and Democrats also appear to perceive Twitter very differently from each other For example Democrats seem more likely to treat Twitter as a place to encounter like minded people Roughly percent of Democrats said they mostly followed Twitter accounts with similar political beliefs to their own as opposed to percent of Republicans This is likely helped by the fact that Twitter s most prolific users swing left A Pew study found that of Twitter s most active users roughly percent identified as Democrats	2022-06-16 20:53:58
海外TECH	Engadget	LG's extra-tall DualUp Monitor is available now for $699	https://www.engadget.com/lg-dualup-monitor-release-date-price-203220327.html?src=rss	LG x s extra tall DualUp Monitor is available now for If you ve been eyeing LG s super tall display ever since December you ll be glad to hear that you can finally buy it LG has released the DualUp Monitor for As promised the clamp mounted design centers on a aspect ratio inch LCD whose x resolution promises the visual real estate of two inch monitors while occupying much less desk space It might fit the bill if you re a media creator or heavy duty multitasker who can t justify an ultra wide screen The Nano IPS based panel should be reasonably accurate with percent coverage of the DCI P color space and it should serve well as a laptop dock between the W USB C power delivery dual HDMI DisplayPort and USB connections The included ergonomic stand can pivot tilt and swivel so you shouldn t have trouble creating the ideal layout There are limitations The DualUp Monitor doesn t offer a K resolution of course and it s not particularly gamer friendly with its Hz refresh rate While it does support HDR the nit typical brightness won t exactly help HDR visuals pop This is a productivity monitor first and foremost and you re paying more for convenience than raw technical prowess	2022-06-16 20:32:20
海外TECH	Engadget	Call of Duty has stricter gun control measures than the US	https://www.engadget.com/call-of-duty-cheaters-weapons-ricochet-200044185.html?src=rss	Call of Duty has stricter gun control measures than the USActivision is taking on Call of Duty cheaters in some inventive ways For one thing it s literally taking away their guns When the Ricochet anti cheat system detects someone who s breaking the rules they may lose their weapons as well as their dignity The cheaters can t even defend themselves with their fists We don t expect many clips of this to find their way online but we have seen it in action and the reactions from cheaters are always priceless the Ricochet team wrote A blog post features a short clip of an undoubtedly upstanding member of the community encountering a now harmless cheater ActivisionThe Disarm measure is one of several actions Ricochet takes against cheaters When a bad actor is detected we hit them with something from our mitigation toolbox or all of them at once if we re feeling spicy and analyze the data from the machine determined to be cheating the team behind it wrote Beyond our mission to combat unfair play we have a second somewhat secret mission to annoy as many cheaters as we can Other mitigation measures include Damage Shield which reduces the damage those who play fairly take from cheaters If you re being shot and see your health slowly trickle down you know it s likely a cheater on the other end of the battle the blog post reads The ne er do well may realize that their opponent has Damage Shield enabled Not only will they waste their ammo they may figure out they ve been caught in the act Another mitigation technique is Cloaking When a cheater fires at a legitimate player the latter may become invisible to the rule breaker Activision said the anti cheat system has led to a significant drop in cheaters in some respects though there have been some unfortunate increases That s part of the perennial cat and mouse battle it s in with cheaters who are always looking for new exploits Since late April though Activision has banned more than players across both Call of Duty Vanguard nbsp and CoD Warzone The Ricochet system will also be used in a new interpretation of Modern Warfare II which will arrive later this year	2022-06-16 20:00:44
ニュース	BBC News - Home	January 6 hearing: Trump pressed Pence in 'illegal' bid to quash vote	https://www.bbc.co.uk/news/world-us-canada-61834957?at_medium=RSS&at_campaign=KARANGA	lawmakers	2022-06-16 20:51:21
ニュース	BBC News - Home	England 3-0 Belgium: Chloe Kelly scores on England return in victory	https://www.bbc.co.uk/sport/football/61820674?at_medium=RSS&at_campaign=KARANGA	England Belgium Chloe Kelly scores on England return in victoryChloe Kelly marks her return to the international stage with a goal as England begin their final preparations for Euro with victory over Belgium	2022-06-16 20:53:11
ビジネス	ダイヤモンド・オンライン - 新着記事	遺産をこの人には分けたくない！相続の「遺留分」を減らす4つの裏技 - 「普通の家庭」が一番危ない！相続完全ガイド	https://diamond.jp/articles/-/304565	遺留分	2022-06-17 05:25:00
ビジネス	ダイヤモンド・オンライン - 新着記事	社外取締役「男女別」報酬・兼務数ランキング【トップ50】報酬4000万円超は男性36人、女性17人 - 社外取「欺瞞のバブル」9400人の全序列	https://diamond.jp/articles/-/304217	社外取締役「男女別」報酬・兼務数ランキング【トップ】報酬万円超は男性人、女性人社外取「欺瞞のバブル」人の全序列東京証券取引所などが定めた企業統治指針では、社外取締役メンバーの多様性を求めており、女性の起用が広がっている。	2022-06-17 05:20:00
ビジネス	ダイヤモンド・オンライン - 新着記事	家族が亡くなったら申請でもらえる・戻ってくるお金10選、埋葬料5万円、遺族基礎年金78万円… - 「普通の家庭」が一番危ない！相続完全ガイド	https://diamond.jp/articles/-/304564	基礎年金	2022-06-17 05:15:00
ビジネス	ダイヤモンド・オンライン - 新着記事	スシロー親会社社長「10月に10％値上げでも客足は戻る」、脱・100円ずし路線に先陣 - Diamond Premium News	https://diamond.jp/articles/-/304918	diamondpremiumnews	2022-06-17 05:10:00
ビジネス	ダイヤモンド・オンライン - 新着記事	「営業職で年収1億円」を目指す人が絶対知るべき、“給料格差”の夢と残酷 - 営業コンサルが解決！上司と部下のお悩み相談室	https://diamond.jp/articles/-/304920		2022-06-17 05:07:00
ビジネス	ダイヤモンド・オンライン - 新着記事	ハーバード大教授が語る、同族経営の会社が「長寿」になれる納得の理由 - ハーバードの知性に学ぶ「日本論」　佐藤智恵	https://diamond.jp/articles/-/304819	佐藤智恵	2022-06-17 05:05:00
北海道	北海道新聞	＜社説＞感染症の司令塔　まず対策の徹底検証を	https://www.hokkaido-np.co.jp/article/694498/	岸田文雄	2022-06-17 05:01:00
ビジネス	東洋経済オンライン	｢戦争と株価｣今が大荒れだからこそ押さえたい事 ウクライナ情勢で世界の株価はどう動いたのか | ウクライナ侵攻､危機の本質 | 東洋経済オンライン	https://toyokeizai.net/articles/-/597277?utm_source=rss&utm_medium=http&utm_campaign=link_back	世界大戦	2022-06-17 05:50:00
ビジネス	東洋経済オンライン	コロナ禍でも｢生活を楽しめた人｣と不満な人の差 ｢ITスキル｣の高さが生活満足度を支えた実態 | 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/-/595503?utm_source=rss&utm_medium=http&utm_campaign=link_back	東洋経済オンライン	2022-06-17 05:30:00
ビジネス	東洋経済オンライン	男子就活生1万2000人が選ぶ就職人気ランキング 2023年卒生が投票､首位は4年連続で伊藤忠商事 | 就職四季報プラスワン | 東洋経済オンライン	https://toyokeizai.net/articles/-/596639?utm_source=rss&utm_medium=http&utm_campaign=link_back	伊藤忠商事	2022-06-17 05:20:00