投稿時間:2022-11-21 00:18:07 RSSフィード2022-11-21 00:00 分まとめ(21件)

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python	Pythonタグが付けられた新着投稿 - Qiita	Python　スクレイピング　参考サイト	https://qiita.com/hiro_hiro_0425/items/40ce809ddb1b41b5662e	tshttps	2022-11-20 23:35:32
js	JavaScriptタグが付けられた新着投稿 - Qiita	はてなブックマークにフィルタ機能を追加する	https://qiita.com/waterleaper/items/7bccdaa380d203959876	閲覧	2022-11-20 23:48:57
js	JavaScriptタグが付けられた新着投稿 - Qiita	プリズン・ブレイク　シーズン5　第9話（最終話）『瞳の奥』のあのシーンを再現するべくWebアプリを制作した。	https://qiita.com/Yuki-Tamura-85/items/6728e4e1e7e8764d20f2	皆さん	2022-11-20 23:06:22
AWS	AWSタグが付けられた新着投稿 - Qiita	amplify push と戦う２	https://qiita.com/mokoenator/items/82733f6456ae16c906a1	amplify	2022-11-20 23:15:56
AWS	AWSタグが付けられた新着投稿 - Qiita	AWS S3に保存してあるファイルをPYTHONで直接読みこむ方法	https://qiita.com/mokoenator/items/36edd8e47e1759c03336	portcsvimportioimportboto	2022-11-20 23:06:19
技術ブログ	Developers.IO	[Flutter] providerでのcontextの読み取り方法3種類を使い比べてみる	https://dev.classmethod.jp/articles/flutter-compare-3-ways-to-read-contexts-with-providers/	context	2022-11-20 14:54:50
海外TECH	DEV Community	How to implement an elegant service discovery extension in the HTTP framework	https://dev.to/llance_24/how-to-implement-an-elegant-service-discovery-extension-in-the-http-framework-9hm	How to implement an elegant service discovery extension in the HTTP framework ForewordIn the previous article the implementation of service registration in Hertz has been interpreted In this article we will focus on the interpretation of Hertz s service discovery part HertzHertz is an ultra large scale enterprise level microservice HTTP framework featuring high ease of use easy expansion and low latency etc Hertz uses the self developed high performance network library Netpoll by default In some special scenarios Hertz has certain advantages in QPS and latency compared to go net In internal practice some typical services such as services with a high proportion of frameworks gateways and other services after migrating Hertz compared to the Gin framework the resource usage is significantly reduced CPU usage is reduced by with the size of the traffic For more details see cloudwego hertz Service discovery extensionHertz supports custom discovery modules Users can extend and integrate other registries by themselves The extension is defined under pkg app client discovery Expansion interface Service discovery interface definition and implementationThere are three methods in the service discovery interface Resolve as the core method of Resolve it will get the service discovery result we need from the target key Target resolves the unique target that Resolve needs to use from the peer TargetInfo provided by Hertz and this target will be used as the unique key of the cache Name is used to specify the unique name of the Resolver and Hertz will use it to cache and reuse the Resolver type Resolver interface Target should return a description for the given target that is suitable for being a key for cache Target ctx context Context target TargetInfo string Resolve returns a list of instances for the given description of a target Resolve ctx context Context desc string Result error Name returns the name of the resolver Name string These three methods are implemented in subsequent code in discovery go SynthesizedResolver synthesizes a Resolver using a resolve function type SynthesizedResolver struct TargetFunc func ctx context Context target TargetInfo string ResolveFunc func ctx context Context key string Result error NameFunc func string func sr SynthesizedResolver Target ctx context Context target TargetInfo string if sr TargetFunc nil return return sr TargetFunc ctx target func sr SynthesizedResolver Resolve ctx context Context key string Result error return sr ResolveFunc ctx key Name implements the Resolver interfacefunc sr SynthesizedResolver Name string if sr NameFunc nil return return sr NameFunc There are three resolution functions in SynthesizedResolver here for each of the three implementations to resolve TargetInfo definitionAs mentioned above the Target method resolves the only target that Resolve needs to use from TargetInfo type TargetInfo struct Host string Tags map string string instance interface definition and implementationInstance contains information from the target service instance There are three methods Address is the address of the target service Weight serves the weight of the target Tag is the tag for the target service in the form of key value pairs Instance contains information of an instance from the target service type Instance interface Address net Addr Weight int Tag key string value string exist bool These three methods are implemented in subsequent code in discovery go type instance struct addr net Addr weight int tags map string string func i instance Address net Addr return i addr func i instance Weight int if i weight gt return i weight return registry DefaultWeight func i instance Tag key string value string exist bool value exist i tags key return NewInstanceNewInstance creates an instance with the given network address and tags NewInstance creates an Instance using the given network address and tagsfunc NewInstance network address string weight int tags map string string Instance return amp instance addr utils NewNetAddr network address weight weight tags tags ResultAs mentioned above the Resolve method will get the service discovery result we need from the target key Result contains the results from service discovery The instance list is cached and can be mapped to the cache using the CacheKey Result contains the result of service discovery process the instance list can should be cached and CacheKey can be used to map the instance list in cache type Result struct CacheKey string Instances Instance client middlewareClient middleware is defined under pkg app client middlewares client DiscoveryDiscovery will use the BalancerFactory to construct a middleware First read and apply the configuration we passed in through the Apply method The detailed configuration information is defined under pkg app client middlewares client sd options go Then assign the service discovery center load balancer and load balancing configuration we set to lbConfig call NewBalancerFactory to pass in lbConfig and finally return an anonymous function of type client Middleware Discovery will construct a middleware with BalancerFactory func Discovery resolver discovery Resolver opts ServiceDiscoveryOption client Middleware options amp ServiceDiscoveryOptions Balancer loadbalance NewWeightedBalancer LbOpts loadbalance DefaultLbOpts Resolver resolver options Apply opts lbConfig loadbalance Config Resolver options Resolver Balancer options Balancer LbOpts options LbOpts f loadbalance NewBalancerFactory lbConfig return func next client Endpoint client Endpoint Implementation principleThe implementation principle of service discovery middleware is actually the last part of Discovery that we did not parse above We will reset the Host in the middleware When the configuration in the request is not empty and IsSD is configured as True we get an instance and call SetHost to reset the Host return func ctx context Context req protocol Request resp protocol Response err error if req Options nil amp amp req Options IsSD ins err f GetInstance ctx req if err nil return err req SetHost ins Address String return next ctx req resp Implementation analysis of service discovery Regular refreshIn practice our service discovery information is updated frequently Hertz uses the refresh method to periodically refresh our service discovery information We will refresh through a for range loop where the interval between the loops is the RefreshInterval in the configuration Then we refresh by traversing the key value pairs in the cache through the Range method in the sync library function refresh is used to update service discovery information periodically func b BalancerFactory refresh for range time Tick b opts RefreshInterval b cache Range func key value interface bool res err b resolver Resolve context Background key string if err nil hlog SystemLogger Warnf resolver refresh failed key s error s key err Error return true renameResultCacheKey amp res b resolver Name cache value cacheResult cache res Store res atomic StoreInt amp cache expire b balancer Rebalance res return true resolver cacheIn the comments of NewBalancerFactory we can know that when we get the same key as the target in the cache we will get and reuse this load balancer from the cache Let s briefly analyze its implementation We pass the service discovery center load balancer and load balancing configuration together into the cacheKey function to get the uniqueKey func cacheKey resolver balancer string opts Options string return fmt Sprintf s s s s resolver balancer opts RefreshInterval opts ExpireInterval Then we will use the Load method to find out whether there is the same uniqueKey in the map if so we will directly return to the load balancer If not we will add it to the cache func NewBalancerFactory config Config BalancerFactory config LbOpts Check uniqueKey cacheKey config Resolver Name config Balancer Name config LbOpts val ok balancerFactories Load uniqueKey if ok return val BalancerFactory val balancerFactoriesSfg Do uniqueKey func interface error b amp BalancerFactory opts config LbOpts resolver config Resolver balancer config Balancer go b watcher go b refresh balancerFactories Store uniqueKey b return b nil return val BalancerFactory There will be a problem if there is no cache for reuse When the middleware initializes and executes two coroutines if the user creates a new client every time it will cause the coroutine to leak SummarizeIn this article we learned about the interface definition of Hertz service discovery the design of client middleware and the reason and implementation of using timed refresh and cache in service discovery implementation Finally if the article is helpful to you please like and share it this is the greatest encouragement to me Referencecloudwego hertz	2022-11-20 14:12:37
海外TECH	DEV Community	The Fascinating Science of 9 Tips to Become a Software Developer	https://dev.to/makendrang/the-fascinating-science-of-9-tips-to-become-a-software-developer-2de9	The Fascinating Science of Tips to Become a Software DeveloperSoftware developers use their programming skills to create new software and update existing applications If you are a creative thinker who likes to solve problems a career as a software developer might be for you This means that you can pursue a career in a field that matches your passions and interests Software developers are creative power behind all types of computer programs They design and write the code used to create anything from operating systems to applications to video games In this role you may be involved in all stages of the software development process from understanding what users need and how to use the software to deploying the finished application Many developers do all the coding themselves but sometimes they work with computer programmers Daily activities include Analyze software user needsDesign test and build software that meets user needsCreate templates and diagrams that describe the code needed to create programs and applicationsPerform maintenance and testing to keep programs runningDocument the processes to provide the information needed for updates and maintenance Software developer vs Software Engineer What s the Difference Software developers and engineers perform many of the same functions with many of the same skills The two terms are sometimes used interchangeably However there is usually a slight difference between the two roles Software developers typically work on a smaller scale than engineers and often focus on areas such as mobile applications and the Internet of Things IoT Software engineers on the other hand make a big picture that includes data analysis testing and measurement not just programming tips for getting a job as a software developerIf you re planning on pursuing a career in software development here are tips to help you reach your goals Learn programming languagesGetting a software development job requires a solid foundation in a programming language Four can be considered on their competence Includes Java Python C Scala JavaJava is a multipurpose programming language used to develop server s appearance applications It works on many platforms including web and Android smartphone apps PythonPython is widely considered to be one of the easiest languages to learn so if you re new to programming this is a great place to start This object oriented language is also known for its versatility applicable to scripting development and data analysis C C C C are popular systems programming languages Based on C C is also a popular choice among game developers You can learn both because the two languages are very similar Scala is a high level programming language that combines functional and object oriented programming concepts It was developed to address some of Java s shortcomings Know your ultimate goalwhere would you like to work What is your vision of your profession Software developers work in a variety of industries including software publishers financial companies insurance companies and computer systems design organizations You can work in healthcare engineering manufacturing or other work environments While many software developers work from traditional offices some take the opportunity to work at agencies or remotely Understanding what you expect from your job will help you move forward For example if you want to work in the healthcare industry you will need to develop industry knowledge and expertise on issues such as data privacy laws and how patient records are stored and accessed Follow the certificate or follow the course You don t necessarily need a college degree to get a job in software development but having a degree can help you develop your technical skills and create more job opportunities When studying a specialization consider one that focuses on development skills such as software engineering computer science or information technology If you have an idea of a field you want to work in consider taking a minor in that field to build your experience in that field Start practicing the development areas Whether you are formally trained or self taught you should spend some time using and developing programming languages This is the key to a complete understanding of the development process which can help you become a more productive efficient and accurate professional If you are passionate about the application design you can choose to develop your skills by building a mobile phone application If you want to work on a computer and server infrastructure you can use it as an engineer Devops There are many areas where you can use your skills as a software developer Create a portfolio of your software development workAs you practice programming and building applications fill them into portfolios Having a portfolio of your best jobs shows potential employers that your resume skills can be used in the real world Your portfolio should contain at least the following Biographycontact addressRelated skillsLink to resumeAwardsprofessional and personal projectsAs you gain more experience organize portfolio to showcase only best work Make sure you include projects that use techniques appropriate for the job you are applying for You can host your portfolio on your own domain Improve your technical skills In addition to programming languages it is useful to have experience with other tools that are often used by software developers Build other skills other than technology As a software developer you are tasked with educating others as you work on projects You should also explain how things work and answer any questions clients and supervisors may have In addition to good communication skills developers must be creative detailed and have good problem solving skills Prove your skills Certification helps validate your skills and demonstrate your competence to potential employers This is useful if you don t have a lot of work experience Apply with confidence If you don t have it yet it s time to create an excellent CV You must clearly demonstrate your career progress and appropriate experience for the position you are looking for Customize to highlight projects and experiences that fit what every business owner is looking for and make sure there are no typos Gratitude for perusing my article till end I hope you realized something unique today If you enjoyed this article then please share to your buddies and if you have suggestions or thoughts to share with me then please write in the comment box Follow me and share your thoughts GitHubLinkedInTwitter	2022-11-20 14:07:53
海外TECH	DEV Community	5 Powerful Habits to Master for Success in Strengthen Your PROFESSIONAL PORTFOLIO	https://dev.to/makendrang/5-powerful-habits-to-master-for-success-in-strengthen-your-professional-portfolio-nn2	Powerful Habits to Master for Success in Strengthen Your PROFESSIONAL PORTFOLIOAnalyze the requirements of your dream job and the points you need to reinforce These are your goals for the year Improve your skills and resume by following the online courses offered by Culture and CreativitySchedule five professional events near you to help you connect and get inspired Choose a specialty and build your personal brand by actively using social networks Focus on the results or on a specific project think about your project or a volunteer project you could work on even if your current job doesn t give you a chance to reach your full potential Gratitude for perusing my article till end I hope you realized something unique today If you enjoyed this article then please share to your buddies and if you have suggestions or thoughts to share with me then please write in the comment box Follow me and share your thoughts GitHubLinkedInTwitter	2022-11-20 14:07:09
Apple	AppleInsider - Frontpage News	Qatar World Cup apps are privacy nightmares, says EU	https://appleinsider.com/articles/22/11/20/eu-warns-against-downloading-qatar-world-cup-apps?utm_medium=rss	Qatar World Cup apps are privacy nightmares says EUSoccer fans visiting Qatar for the World Cup shouldn t download or install the event s official apps to their iPhone or other devices EU data protection chiefs claim due to the immense privacy risk they pose to those who use them FIFA World Cup ballMajor events like the World Cup often produce apps to help visitors and fans navigate schedule travel and find out other things they may need to know while in attendance Though most of the time these apps are fine it seems not to be the case for the World Cup Read more	2022-11-20 14:04:29
海外TECH	Engadget	Microsoft's Black Friday deals cut more than $500 off Surface device bundles	https://www.engadget.com/microsoft-black-friday-deals-cut-more-than-500-off-surface-device-bundles-143011950.html?src=rss	Microsoft x s Black Friday deals cut more than off Surface device bundlesMicrosoft s Black Friday deals are in full swing meaning you can save a ton on Surface devices Xbox accessories and more right now Surface fans will want to check out the bundles on sale for the holiday shopping season Microsoft is one of your best bets if you want to get most things you ll need to make a Surface device your own all in one shot while retailers like Amazon tend to have good deals on devices only Shop Surface bundles at MicrosoftOne of our favorite bundles is on the Surface Laptop Go which made our list of best cheap Windows laptops Depending on the configuration you choose you can save more than on a bundle that includes the notebook a Surface Mobile Mouse and a three year protection plan The most affordable config will run you just over and that gets you the Go with a Core i processor GB of RAM and a GB SSD But we recommend springing for the next model up ーthat one has GB of RAM along with the rest of the same specs and the bundle will cost you just over You ll appreciate those extra GB of RAM when you re doing any kind of multitasking including having a plethora of Edge tabs open while running a couple of other apps at the same time While most discounts are on slightly older Surface device bundles there are a couple available for the new Surface Pro and the Surface Laptop For the Pro you can save at minimum on a bundle that includes the two in one a Surface Pro Signature Keyboard a Microsoft subscription and a two year protection plan Arguably most importantly you can choose from either the Intel or ARM powered Pro s for this Essential Bundle and we recommend going with the former to get the best performance possible As for the Essential Bundle for the Laptop you re getting the same things as in the Pro bundles albeit without the keyboard attachment If you already have your computer of choice Microsoft also has a number of good Xbox deals to consider Not only can you get off the Xbox Series S and get a headset along with it but the company is also matching a lot of the Xbox controller deals we first spotted at Amazon That s all on top Microsoft knocking up to percent off certain Xbox titles too Shop Xbox deals at MicrosoftGet the latest Black Friday and Cyber Monday offers by following EngadgetDeals on Twitter and subscribing to the Engadget Deals newsletter	2022-11-20 14:30:11
海外TECH	Engadget	Apple's AirTag 4-pack drops to a new record low ahead of Black Friday	https://www.engadget.com/apples-airtag-4-pack-drops-to-a-new-record-low-ahead-of-black-friday-141002755.html?src=rss	Apple x s AirTag pack drops to a new record low ahead of Black FridayAirTags make great stocking stuffers for your loved ones who are constantly forgetting where they put their most important things If you want to pick up a few Amazon has the four pack of AirTags for only right now which is the lowest price we ve seen on that set That also brings the price of each individual tracker down to which is much cheaper than buying a single AirTag at its current rate Apple joined the Bluetooth tracker space in with AirTags which can help you keep track of your keys wallet and other belongings They pair quickly and seamlessly with iPhones in a process very similar to that of AirPods and you can digitally label them with the name of the thing they re monitoring After that quick setup process you can see the last known location of your things from within the Find My app and you ll even get alerts when say you ve left your keys behind when you and your iPhone have moved to another location From your phone you can force AirTags to emit a chime to help you find your lost items more easily and those with the latest iPhones can get on screen directions to their missing things as long as they aren t too far away Our biggest gripe with AirTags is a very Apple y one the trackers don t have a keyring hole so you have to put them in a case sleeve or another holder if you want to attach them to anything Thankfully most of our favorite AirTag cases are even cheaper than the tracker itself so it may be a good idea to pick up a case for your loved one to whom your also gifting the AirTag Also it goes without saying that AirTags are only viable for people with iPhones or those otherwise steeped in the Apple ecosystem Thankfully there are a number of other options out there for non Apple users including those from Tile Chipolo and Samsung Get the latest Black Friday and Cyber Monday offers by following EngadgetDeals on Twitter and subscribing to the Engadget Deals newsletter	2022-11-20 14:10:02
海外TECH	CodeProject Latest Articles	Asynchronous Multicast Delegates in Modern C++	https://www.codeproject.com/Articles/5277036/Asynchronous-Multicast-Delegates-in-Modern-Cpluspl	callable	2022-11-20 14:44:00
海外科学	BBC News - Science & Environment	COP27: Climate costs deal struck but no fossil fuel progress	https://www.bbc.co.uk/news/science-environment-63677466?at_medium=RSS&at_campaign=KARANGA	damages	2022-11-20 14:20:00
金融	◇◇　保険デイリーニュース　◇◇（損保担当者必携！）	保険デイリーニュース(11/21)	http://www.yanaharu.com/ins/?p=5082	中間決算	2022-11-20 15:00:12
ニュース	BBC News - Home	COP27: Climate costs deal struck but no fossil fuel progress	https://www.bbc.co.uk/news/science-environment-63677466?at_medium=RSS&at_campaign=KARANGA	damages	2022-11-20 14:20:00
ニュース	BBC News - Home	Club Q Colorado shooting: Five dead after attack at nightclub	https://www.bbc.co.uk/news/world-us-canada-63693310?at_medium=RSS&at_campaign=KARANGA	colorado	2022-11-20 14:54:14
ニュース	BBC News - Home	Charles charity: Police pass file on cash-for-honours allegations to CPS	https://www.bbc.co.uk/news/uk-england-london-63690651?at_medium=RSS&at_campaign=KARANGA	charities	2022-11-20 14:28:02
ニュース	BBC News - Home	Abu Dhabi Grand Prix: Max Verstappen wins as Sebastian Vettel scores points in final race	https://www.bbc.co.uk/sport/formula1/63691532?at_medium=RSS&at_campaign=KARANGA	Abu Dhabi Grand Prix Max Verstappen wins as Sebastian Vettel scores points in final raceRed Bull s Max Verstappen wins the final race of the season in Abu Dhabi as Ferrari s Charles Leclerc beats Sergio Perez to secure second in the championship	2022-11-20 14:36:52
ニュース	BBC News - Home	Chelsea 3-0 Tottenham: Manager Emma Hayes returns as Blues go top of WSL	https://www.bbc.co.uk/sport/football/63612798?at_medium=RSS&at_campaign=KARANGA	bridge	2022-11-20 14:56:23
ニュース	BBC News - Home	World Cup 2022: Joe Allen ruled out of Wales opener against United States	https://www.bbc.co.uk/sport/football/63695407?at_medium=RSS&at_campaign=KARANGA	opener	2022-11-20 14:15:08