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海外TECH	DEV Community	JavaScript Classes. Pt 2	https://dev.to/wonuola_w/javascript-classes-pt-2-1a6f	JavaScript Classes Pt The extends keyword is used in class declarations and expressions to create a class that acts as a child of another class class x extends y Here x is the child class and y is the parent class The extend keyword acts as the link between the two classes The extends keyword can also connect a class to a built in object or a subclass a class inside another class Please note that the first class must be the child class and not a parent class or a built in object The Prototype PropertyAny constructor with the parent class prototype property can be considered a candidate for the parent property Note The prototype should not be an object or null The prototype refers to an object linked to every function and built in object by default in JavaScript and can be easily accessed and modified but it is not visible The super methodJust as a child in real life inherits the parent s properties the properties of a parent in JavaScript work the same way In this case the child class inherits all of the parent class s methods Why is inheritance in JavaScript necessary To avoid repetition of code inheritance helps with the reusability of code whereby a class inherits the methods of a parent class as explained above The super method and its relationship with inheritance align left The super method refers to the parent class It helps get access to the parent s properties and methods In simple words it helps make inheritance possible It does this by calling the constructor of the parent class within the child class The superKeyword can access properties On an object literalOn a class prototypeInvoke a superclass constructor How exactly do the super method and the extend keyword work in code lt body gt lt p id task gt lt p gt lt script gt class Pride constructor lion this name lion method return this name is the king of the savannah and extend keywordclass Cub extends Pride constructor lion simba Note The super method must be called before the this keyword excluding the super method or using it after the this keyword will result to a reference errorsuper lion refers to the parentClassthis cub simba answer return this method this cub is his son theKing new Cub mufasa simba document getElementById task innerHTML theKing answer lt script gt lt body gt lt html gt Things to note when using the extend keyword On the right hand side you can use any expression that evaluates to a constructor Y is the right hand side in this case x extends y The extends keyword sets the prototype for both the child class and its prototype Here it allows the inheritance of the static properties and the prototype properties You can use extend with predefined objects like arrays dates math and strings To get a full grasp on JavaScript classes please check out my first article on JavaScript classes	2022-07-15 19:46:22
海外TECH	DEV Community	Why is JavaScript Single-Threaded and Non-Blocking	https://dev.to/elijahtrillionz/why-is-javascript-single-threaded-and-non-blocking-3m5n	Why is JavaScript Single Threaded and Non Blocking JavaScript is a single threaded and non blocking language Chances are you have heard that statement a couple of times and have no idea what it means or you don t fully understand it If you have not heard of it before well now you know But you might ask What does that even me well in this article am going to try to explain what it means in the simplest possible form Now why should you or any JavaScript developer even care about understanding what that statement means This is because the statement explains how the JavaScript runtime works behind the hood It explains how JavaScript executes the code we write Understanding that statement alone will help you write better code and also help you know when to write code synchronously or asynchronously Alright let s get into it already I will explain this by breaking it down into two subheadings What is a single threaded languageHow is JavaScript non blocking What is a single threaded languageA single threaded language is a language that uses only one thread In other words it executes one thing at a time JavaScript is single threaded so it executes the current line of code before moving to the next Think of it like a basic queue of people waiting to withdraw their money from an ATM no matter how smart the ATM is it can only serve one customer at a time right Let s see an example in codefunction funcOne console log First function function funcTwo console log Second function funcOne funcTwo From the above example JavaScript executes the function as called one after the other A function that isn t invoked will not be executed but it will be parsed a way of JavaScript knowing that there is a function there so when called it can easily go back to it Now each function is pushed to the call stack to get executed The call stack keeps track of the current functions that are being run and what functions are called within the function When the current function is finished the call stack pushes it out and continues from where it stopped in the code So while the funcOne function and its children are being executed every other function funcTwo will have to wait This is how single threaded language works and this kind of behavior may give rise to blocking Basically any code that is slow to execute is blocking It could be a network request loading an image a loop that runs to million etc Other interesting situations could be an infinite loop or an alert message waiting for a response from the user For example alert Hello World console log You received a hello world message The console log function is blocked from executing because of the alert function When you run it in the browser you will get an alert message Hello World not until there is a response to the alert message every other function including buttons in the browser will be blocked from executing Another common example would be an infinite loop while true console log I am true console log I will never be executed If you execute the code above in a browser which you shouldn t you would notice that the buttons on the website if there are any wouldn t seem to be working selecting a text if there are any would have no effect Technically the website is blocked And there is no way I will never be executed is logging in the console So technically we re saying every single threaded language including JavaScript is blocking How is JavaScript non blockingSo far we ve learned about how JavaScript executes its codes naturally We ve also seen that as a result of JavaScript being single threaded in nature some codes in JavaScript can be blocking But if you haven t fully grasped what this blocking means here is a metaphor to give you a light understanding before we go a little deep Imagine a cashier in the bank who waits for a customer to correct his her errors while other customers in the queue wait So not until the current customer is done with his her correction s the cashier will not attend to any other customers This is how JavaScript works it is synchronous in nature But you and I know there is a simple solution to this problem which is While the current customer corrects his her error he she can move to the side so other customers that are ready can be attended to Whenever the initial customer is done he she can come back to the cashier to do whatever This my friend is how JavaScript is non blocking that is working asynchronously Asynchronous JavaScriptAn asynchronous function will not block the execution of other functions in the call stack For exampleconsole log Hey setTimeout gt console log I am John console log Bye now This will simply log Hey gt Bye now gt I am John in the console This is because asynchronous functions e g the setTimeout function will not block the execution of other functions in the call stack From the example above the setTimeout function is meant to delay for second before the function in it is executed but that won t stop the console log Bye now function from executing nor will it delay it This is because asynchronous functions when pushed to the call stack are pushed out of the call stack to Web APIs to be executed there Whenever the asynchronous function is ready it is pushed back in an interesting way we will talk about this in a moment So our setTimeout function in the example above is pushed to Web APIs to be executed there Now it wasn t pushed there because of the delay of second it was pushed there because it is an asynchronous function so even if we had a delay of seconds the outcome would still be the same i econsole log Hey setTimeout gt console log I am John console log Bye now To log Hey gt Bye now gt I am John in the console So what happens after the setTimeout function has been executed in the Web API When the setTimeout function is executed it isn t pushed back to the call stack immediately rather it is pushed to a callback queue to wait for all other functions in the call stack to be executed before it is pushed back to the call stack So from Call stack gt Web API gt Callback queue gt and back to the Call stack This my friend is called the event loop This is a little different from how customers who make errors in the bank are attended to This time the browser being the manager cashier at the bank is saying if you are sidelined to make corrections to your errors or add missing details you will have to go back to the end of the queue to wait till it gets to your turn again Not really a good experience for us humans but the browser loves this algorithm a lot and we developers benefit from it too Pushing asynchronous functions to the web APIs can also be thought of as scheduling for later So technically JavaScript being non blocking doesn t mean it s multi threading or multi tasking rather it means the browser can smartly schedule asynchronous tasks for later later being when it is ready The same thing when making network requests asynchronously the function is pushed out of the call stack to make the request to whatever API and when it is ready it is pushed to the callback queue ConclusionSo far we ve learned what it means when someone says JavaScript is single threaded and also non blocking And hopefully we ve grasped a few things about the event loop I would recommend you watch the What the heck is the event loop YouTube video by Philip Roberts it will give you more understanding of the event loop and you d know how to use the Loupe website P S Sorry about the size of the gif But trust me you ll get a better view when you play with the Loupe website Alright that s it for today guys Follow me for more articles like this and if you find this article useful please share Also let me know what you think about the article in the comment section or you can ping me on Twitter elijahtrillionz	2022-07-15 19:37:23
海外TECH	DEV Community	The worst piece of life advice I ever received	https://dev.to/transient-thoughts/the-worst-piece-of-life-advice-i-ever-received-3j08	The worst piece of life advice I ever receivedCover photo by Dollar Gill on Unsplash Throughout my entire life I have been given the following advice more times than I can remember Do not think that you are anything special This is the worst piece of life advice I have ever received and still it is occasionally given to me in various forms The Law of JanteI spent my childhood being told by so called role models that I was dumb and that I would never make anything of myself Growing up further from civilization than the town which the fictional Danish town of Jante is based on this should come as no surprise The Law of Jante states that You are not to think you are anything special You are not to think you are as good as we are You are not to think you are smarter than we are You are not to imagine yourself better than we are You are not to think you know more than we do You are not to think you are more important than we are You are not to think you are good at anything You are not to laugh at us You are not to think anyone cares about you You are not to think you can teach us anything The Law of Jante is a tribute to conformity and not doing anything out of the ordinary Do not even think about doing anything extraordinary That would be unworthy and inappropriate in the Jante society Small Scandinavian societies such as the one of fictional town of Jante disapprove if we express our individuality or personal success My life advice to youConforming to the Law of Jante leads to the infamous Impostor Syndrome Doubting your abilities and feeling like a fraud Instead my advice to you is this Know that you are someone special Appreciate that you are important Believe that someone cares about you Believe in yourself Don t let others bring your down Surround yourself with people supporting you for the right reasons Recognize that you are good at something It is OK to take pride in being good at something Ignore haters You can teach something to someone This is the way to excel in a subject and teaching is a most precious experience You are extraordinary	2022-07-15 19:07:57
Apple	AppleInsider - Frontpage News	Hands-on with Apple's M2 MacBook Air in Starlight	https://appleinsider.com/articles/22/07/15/hands-on-with-apples-m2-macbook-air-in-starlight?utm_medium=rss	Hands on with Apple x s M MacBook Air in StarlightWe ve got our hands on the new MacBook Air with the M processor Here are our early impressions M MacBook AirThe redesign of the MacBook Air feels more notable in hand compared to the MacBook Pro The Pro went from slightly covered edges to slightly squared edges Not a huge departure Read more	2022-07-15 19:47:19
Apple	AppleInsider - Frontpage News	Apple argues that anti-steering injunction was 'legally improper' in new brief	https://appleinsider.com/articles/22/07/15/apple-argues-that-anti-steering-injunction-was-legally-improper-in-new-brief?utm_medium=rss	Apple argues that anti steering injunction was x legally improper x in new briefApple on Friday submitted a final filing in its ongoing legal battle with Epic Games arguing that an injunction targeting anti steering on the App Store should get tossed out Credit Epic GamesIn a cross appeal brief submitted to the Ninth Circuit Court of Appeals Apple lays out its argument as to why the anti steering injunction was legally improper More specifically the iPhone maker argues that the court handed down an unprecedented result despite the fact that Epic did not prove harm Read more	2022-07-15 19:19:04
Apple	AppleInsider - Frontpage News	Compared: New M2 MacBook Air vs M1 MacBook Air	https://appleinsider.com/articles/22/06/07/compared-new-m2-macbook-air-vs-m1-macbook-air?utm_medium=rss	Compared New M MacBook Air vs M MacBook AirApple has given the MacBook Air its first major refresh after it transitioned to Apple Silicon Here s how the new M version measures against the M model in our hands on tests M MacBook Air left and M MacBook Air right The MacBook Air was one of three models of Mac used by Apple to introduce Apple Silicon As an entry level Mac device it was an easy choice for the company to include in its first wave of M equipped hardware Read more	2022-07-15 19:42:10
海外TECH	Engadget	TikTok's global security chief is stepping down amid US user data controversy	https://www.engadget.com/tiktok-global-chief-security-officer-steps-down-192756032.html?src=rss	TikTok x s global security chief is stepping down amid US user data controversyTikTok s global chief security officer CSO will step down from that position and shift into a strategic advisory role Roland Cloutier s change in duties follows concerns about how the company is handling US user data TikTok recently admitted that employees outside of the country were able to access that information although quot robust cybersecurity controls and authorization quot from its US security team were required Cloutier will be an adviser on the business impact of TikTok s security and trust programs TikTok s head of security risk vendor and client assurance Kim Albarella will take over as the chief of the company s worldwide security teams on an interim basis quot Part of our evolving approach has been to minimize concerns about the security of user data in the US including the creation of a new department to manage US user data for TikTok quot CEO Shou Zi Chew wrote in a memo to TikTok staff quot This is an important investment in our data protection practices and it also changes the scope of the global chief security officer role With this in mind Roland has decided to step back from his day to day operations as global CSO effective September nd quot A TikTok spokesperson told The Wall Street Journal Cloutier wasn t overseeing the new team that manages US user data That department reports to Chew directly Cloutier s departure wasn t related to lawmakers concerns over US data security the spokesperson said and the shift had been in the works for a couple of months Last month BuzzFeed News reported that China based engineers at TikTok s parent company ByteDance accessed non public data on US TikTok users on multiple occasions between at least last September and January TikTok said it s now storing all US users data on Oracle cloud servers located in the country and that it was working to remove such private data from its own servers In a letter to a group of Republican senators this month Chew wrote that the company is focused on removing quot any doubt about the security of US user data quot	2022-07-15 19:27:56
海外TECH	Engadget	Sony completes $3.6 billion deal to buy Bungie	https://www.engadget.com/sony-closes-bungie-acquisition-playstation-studios-190623763.html?src=rss	Sony completes billion deal to buy BungieThe developer behind Destiny is now a part of the Sony universe Sony Interactive Entertainment officially closed on a billion deal today to buy the independent game studio and publisher Bungie according to tweets from both Bungie and PlayStation Studios Under the terms of the acquisition Bungie will still maintain creative control over its operations and independently develop its games As leaders from bothcompanies have noted since the deal was announced in January Bungie will be considered an independent subsidiary of Sony and won t be required to make either current or future games exclusive to PlayStation consoles We are proud to officially join the incredible team at PlayStation we are excited for the future of our company and we are inspired to bring together players from all over the world to form lasting friendships and memories Per Audacia ad Astra pic twitter com YQbnLrnAQWーBungie Bungie July As TechCrunch noted Sony is hoping Bungie s expertise with games like Destiny will help it expand its own live service game offerings The company plans to spend percent of PlayStation s budget on live service games by revealed Sony CEO Jim Ryan at a May investor presentation PlayStation plans on releasing live service games before March and Sony believes Bungie s assistance will be crucial in this effort Sony this week also closed on a deal to acquire Montreal based Haven Studios which is working on a multiplayer title for PlayStation And Sony is far from finished The company plans to acquire even more studios over the next few years in a bid to grow its live service and PC offerings as Ryan has noted in several interviews And on the Xbox side Microsoft s billion acquisition of Activision Blizzard is expected to close next summer	2022-07-15 19:06:23
海外科学	NYT > Science	The U.S. Has a New Crisis Hotline: 988. Is It Prepared for a Surge in Calls?	https://www.nytimes.com/2022/07/15/us/988-mental-health-lifeline.html	The U S Has a New Crisis Hotline Is It Prepared for a Surge in Calls The United States is rolling out a reimagined suicide prevention number to address a national mental health crisis But funding and staffing issues have left some questioning whether it s ready	2022-07-15 19:59:29
ニュース	BBC News - Home	Ukraine round-up: Girl, 4, among Russian rocket attack victims and British aid worker dies	https://www.bbc.co.uk/news/world-europe-62186324?at_medium=RSS&at_campaign=KARANGA	front	2022-07-15 19:15:43
ニュース	BBC News - Home	Heathrow delays: Emirates agrees to cap summer flights	https://www.bbc.co.uk/news/business-62182881?at_medium=RSS&at_campaign=KARANGA	delays	2022-07-15 19:48:49
ニュース	BBC News - Home	The Open: Tiger Woods misses cut as Cameron Smith leads 150th Championship at St Andrews	https://www.bbc.co.uk/sport/golf/62181388?at_medium=RSS&at_campaign=KARANGA	The Open Tiger Woods misses cut as Cameron Smith leads th Championship at St AndrewsCameron Smith sets the pace on day two of the th Open Championship as Tiger Woods misses the halfway cut amid emotional scenes on the Old Course	2022-07-15 19:54:19
ニュース	BBC News - Home	The Open: Viktor Hovland pitches in from the rough for eagle	https://www.bbc.co.uk/sport/av/golf/62181273?at_medium=RSS&at_campaign=KARANGA	The Open Viktor Hovland pitches in from the rough for eagleNorway s Viktor Hovland sends his pitch shot from the rough straight into the hole for an eagle two on the th hole of the Old Course at St Andrews	2022-07-15 19:22:18
ニュース	BBC News - Home	Andy Murray beaten by Alexander Bublik in Hall of Fame Open quarter-finals	https://www.bbc.co.uk/sport/tennis/62186688?at_medium=RSS&at_campaign=KARANGA	finals	2022-07-15 19:41:32
ニュース	BBC News - Home	Euro 2022: England defender Demi Stokes ruled out of final group game against Northern Ireland	https://www.bbc.co.uk/sport/football/62155093?at_medium=RSS&at_campaign=KARANGA	Euro England defender Demi Stokes ruled out of final group game against Northern IrelandPreview followed by live coverage of Friday s Women s European Championship game between Northern Ireland and England	2022-07-15 19:00:48
ビジネス	ダイヤモンド・オンライン - 新着記事	「カップヌードルは高すぎ」を覆した、戦略とビジネスモデルの秀逸さとは - 事例で学ぶ「ビジネスモデルと戦略」講座	https://diamond.jp/articles/-/306545	講座	2022-07-16 04:55:00
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ビジネス	ダイヤモンド・オンライン - 新着記事	東京・表参道で「おひとりさま」満喫！ご褒美グルメにストレス解消体験も - 地球の歩き方ニュース＆レポート	https://diamond.jp/articles/-/306291	東京・表参道で「おひとりさま」満喫ご褒美グルメにストレス解消体験も地球の歩き方ニュースレポート「aruco」の国内シリーズから、究極のおひとりさま本『地球の歩き方aruco東京ひとりさんぽ』が誕生。	2022-07-16 04:45:00
ビジネス	ダイヤモンド・オンライン - 新着記事	ガーシー当選で激震、選挙戦を変える「YouTuber×リモート演説」の威力 - 井の中の宴 武藤弘樹	https://diamond.jp/articles/-/306546	ガーシー当選で激震、選挙戦を変える「YouTuber×リモート演説」の威力井の中の宴武藤弘樹時の人といえば、「ガーシー」こと東谷義和氏。	2022-07-16 04:40:00
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ビジネス	東洋経済オンライン	日暮里､駅前再開発の｢先行モデル｣が示す将来像 対照的な東口の再開発ビルと西口の｢ネコの街｣ | 山手線の過去・現在・未来 | 東洋経済オンライン	https://toyokeizai.net/articles/-/603886?utm_source=rss&utm_medium=http&utm_campaign=link_back	東洋経済オンライン	2022-07-16 04:30:00