投稿時間:2022-07-15 00:38:36 RSSフィード2022-07-15 00:00 分まとめ(41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
IT	気になる、記になる…	Amazon、｢Kindleインディーズマンガ 2022年上半期ランキング｣を公開	https://taisy0.com/2022/07/14/159144.html	amazon	2022-07-14 14:27:49
IT	気になる、記になる…	Amazon、今年の｢プライムデー｣で過去最高記録を更新したことを明らかに − 最も売れたのは｢Fire TV Stick｣	https://taisy0.com/2022/07/14/159140.html	amazon	2022-07-14 14:17:45
AWS	AWS Government, Education, and Nonprofits Blog	OpenFold, OpenAlex catalog of scholarly publications, and Capella Space satellite data: The latest open data on AWS	https://aws.amazon.com/blogs/publicsector/openfold-openalex-catalog-scholarly-publications-capella-space-satellite-data-latest-open-data-aws/	OpenFold OpenAlex catalog of scholarly publications and Capella Space satellite data The latest open data on AWSThe AWS Open Data Sponsorship Program makes high value cloud optimized datasets publicly available on AWS Our full list of publicly available datasets are on the Registry of Open Data on AWS and are now also discoverable on AWS Data Exchange This quarter we released new or updated datasets including OpenFold OpenAlex and radar data from Capella Space Check out some highlights from the new or updated datasets	2022-07-14 14:31:54
js	JavaScriptタグが付けられた新着投稿 - Qiita	Node.jsでString.ReplaceAllが使えないんだが！！	https://qiita.com/odkey/items/8d6471b2806f7b237cb5	constnums	2022-07-14 23:55:30
js	JavaScriptタグが付けられた新着投稿 - Qiita	【React / Next】POST と PUT をカスタムフックで1つにまとめて、使用側はどちらかを意識しないようにする	https://qiita.com/tak001/items/84664bcd2ce769794220	exportconstuseprofilenew	2022-07-14 23:38:10
Ruby	Rubyタグが付けられた新着投稿 - Qiita	railsのmigrationfileについてのメモ	https://qiita.com/gaia0683/items/2ad9325e4ab6aee6f1cf	migrationfile	2022-07-14 23:53:11
Ruby	Railsタグが付けられた新着投稿 - Qiita	railsのmigrationfileについてのメモ	https://qiita.com/gaia0683/items/2ad9325e4ab6aee6f1cf	migrationfile	2022-07-14 23:53:11
Ruby	Railsタグが付けられた新着投稿 - Qiita	ActiveRecordのorderをハッシュで指定した際に、syntax errorが出る	https://qiita.com/AYukiEngineer/items/cac9b8b41d435a1b183c	categoryidascselectpages	2022-07-14 23:43:47
技術ブログ	Developers.IO	AWS SDK for JavaScript v3の実行で”getaddrinfo ENOTFOUND xxx.region.amazonaws.com”というエラーが発生する際の確認ポイント	https://dev.classmethod.jp/articles/when-you-run-the-aws-sdk-for-javascript-v3-with-the-error-getaddrinfo-enotfound-xxxregionamazonawscom-confirmation-points/	awssdkforjavascriptv	2022-07-14 14:26:18
技術ブログ	Developers.IO	組織パターンカタログ – 例説〜具体例による認識合わせ	https://dev.classmethod.jp/articles/org-catalog-explanation-by-example/	組織パターン	2022-07-14 14:04:43
海外TECH	MakeUseOf	The 8 Best Careers in Digital Marketing You Can Apply For	https://www.makeuseof.com/best-careers-digital-marketing/	The Best Careers in Digital Marketing You Can Apply ForWant to start your career in digital marketing but are unsure which field is right for you Here are the best digital marketing careers to consider	2022-07-14 14:45:15
海外TECH	MakeUseOf	How to Install the macOS Ventura Beta on Your Mac	https://www.makeuseof.com/how-to-install-macos-beta/	apple	2022-07-14 14:45:16
海外TECH	MakeUseOf	What You Need to Know About the ATmega328P Before You Use an Arduino	https://www.makeuseof.com/what-you-should-know-about-atmega328p-arduino/	microcontroller	2022-07-14 14:30:15
海外TECH	MakeUseOf	How to Fix a Persistent "Enter Network Credentials" Message on Windows	https://www.makeuseof.com/windows-enter-network-credentials/	How to Fix a Persistent amp quot Enter Network Credentials amp quot Message on WindowsIs Windows rejecting your network credentials even when you re sure they re right Here s the fix	2022-07-14 14:15:15
海外TECH	DEV Community	Sprout endless sites from a single Next.js and Umbraco instance	https://dev.to/kaspera/sprout-endless-sites-from-a-single-nextjs-and-umbraco-instance-3227	Sprout endless sites from a single Next js and Umbraco instanceHas building ordinary single websites become monotonous for you Do you need to let loose and just try something new for a bit Well you re in luck we ve got just the thing to spice up your developer life In this article we will show you how to build multiple different websites using just a single Umbraco instance as the CMS and a single Next js as the frontend And to get that sweet sweet performance we re also going to use Enterspeed as a speed layer to serve our content img alt Is such a thing even possible Yes it is lt br gt height src dev to uploads s amazonaws com uploads articles fxabnpbmya gif width Some of you might sit with a puzzled look on your face thinking Why on earth would one do that Is this merely an insane idea like using Google Sheets as a CMS Even though I ll admit that we love to push the envelope here at Enterspeed and try out crazy things there are actually several use cases for this scenario One of these scenarios is microsites Microsites can if used correctly be an extremely powerful marketing strategy for your business Pssst Don t care about marketing and strategy but simply want the geeky stuff Then you can safely skip the section below The power of Microsites First of all what the dickens is a microsite A microsite is a small website that exists separate from the primary website often on its own domain or subdomain Unlike the primary website it often has just a single goal for instance to promote a single product service or event Even though they share similarities a microsite is not a landing page since a landing page is just a single page A landing page is also focused mainly on hard conversions whereas a microsite focus can be more about an experience which can help to assist conversions later down the road Let s look at a few examples Say we are a business that owns several sub brands or product lines Each of these brands products may have its own unique design and may also be targeting different demographics This could for instance be a brewery selling both alcoholic and non alcoholic beers Having a unique microsite where they can fully control the visual identity and the communication would not only make the message more powerful it would also help with ad relevance when driving paid traffic to it Another similar example could be a brand with a single product that targets different demographics this could be a nutrient supplement The target groups for this nutrient supplement could be Older people who wish to reduce the risk of diseases like osteoporosisAthletes who are interested in gaining the extra performanceHealth focused adults who are all about a healthy lifestyleJust to name a few How you market a product to these three groups differs highly both in communication and design A third example could be a product or a service with an extremely long and complicated buyer s journey for instance prefabricated houses The time it takes for a family looking for a house to go from idea top funnel to actual purchase bottom funnel can be literal years This whole sales funnel can contain hundreds of touchpoints and consist of several questions like Rent or buy How much money for a down payment New house vs old house And much much much more Having strategic microsites which assist along the whole buyer s journey can be their bytes worth in gold Last example before jumping into the nitty gritty details Say you are a pest control company You want to increase your organic presence in the search engines to gain more customers and reduce your reliance on SEM paid advertisement in search engines A strategy here could be to build a microsite for each type of house pest e g flies bed bugs wasps rats termites etc Each of these sites will be highly relevant for this specific topic and can be easier to build links to some website owners prefer to link to a topic website instead of a company website Phew that was a lot of marketing talk To quote Linus Torvalds “Talk is cheap Show me the code Setting up your projectThis example will be built around our fictional company Enterbrew img alt Enterbrew microsites lt br gt height src dev to uploads s amazonaws com uploads articles awrgertqvprcbmxi jpg width Enterbrew is a brewery consisting of subbrands targeting different demographics Dev BeerToBeerLorem BeerIce beerEach of these microsites will have a homepage a page listing the different beers individual product pages for each beer and finally an about page However even though we re going to run all of this from the same backend and the same frontend we re not limited to this structure If we wanted we could use different page types for each page Let s start by setting up a Umbraco instance Setting up UmbracoStart by downloading and installing Umbraco e g on your local machine You can also use Umbraco Cloud if you prefer Note We re currently working on an Enterspeed integration for version for now we re only supporting V V and V Afterward go to the Umbraco Backoffice click on Settings select Document Types In this example we re using document types Home the homepage which will also be our root nodeBeers the parent page of all our beersBeer the single product pageContent page used for general content here our about pageWe re not going to go over all the properties of each template since they can be whatever you want The important thing is that you set one of your document types in our example Home as your root node This is done under Permissions in the template where you set the Allow as root to true Next go to Content and create a new item with the root node type in our example Home you just created Once it s been created right click on it and choose Culture and Hostnames Add the domain you wish to use for this site e g Repeat the step above for all the sites you wish to create Now it s time to set up the Enterspeed integration Once we ve connected our Umbraco site with our Enterspeed account all of our content will be automatically synced to Enterspeed providing us with a blazing fast speed layer and essentially decoupling our Umbraco instance But before we start blasting content into Enterspeed we first need to create a data source inside Enterspeed which provides us with an API key Go to Enterspeed click on Settings and select Data sources Click Create Group and give your group a name and a type Next add a data source our Umbraco instance and select an environment e g Development Click Add and then click Create Pssst If you don t have an account already you can create one right here no credit card required Awesome now we got an API key Let s head back to our Umbraco instance Start by adding the Enterspeed integration via NuGet We currently have integrations for versions V V and V Once you have installed the integration you ll see a new tab under Settings called Enterspeed Settings Add as the Enterspeed endpoint and the API key you just created under API key Test your connection and click Save configuration if everything goes well All content will now be synced to your Enterspeed account when you save and publish If you need to seed already published content then click on Content and select the Enterspeed Content tab Choose Seed and click on the Seed button Excellent now it s time to set up Enterspeed Setting up EnterspeedVerify that all your content has been synced by going to Source entities under Home Choose your data source and check if all your content is present Furthermore confirm that the domain you entered under Culture and Hostnames in Umbraco matches the one in the URL column If everything is good then it s time to create our first schemas So first what is a schema and why do we need them One of the powerful things about Enterspeed is its ability to transform and model content into exactly the views you need This is done by creating schemas Schemas make it easy to combine multiple data sources and to make deeply nested properties more accessible For our example we will create a schema for each document type we created in Umbraco and two for the navigation one for single navigation items and one containing all the navigation items Once we have created and deployed the schemas a view will be generated for each source entity that matches the schemas trigger A trigger defines what you want the schema to trigger on It consists of a source group your data source and contains an array of one or more soure entity types types of content img alt Enterspeed schema Page lt br gt height src dev to uploads s amazonaws com uploads articles jjjhvydpleekqxpq png width In the trigger property we first define the source group here our Umbraco data source group and next the source entity types e g our page types Furthermore we also need to define how we want to access these generated views when called from the front end Here we have two options Handle and URL All the schemas that are based on document types from Umbraco reflect an actual page therefore we will use the URL route option The navigation on the other hand is an entity that will be used across the entire app therefore we will use the Handle route option Let s take a look at each schema Beer schemaThis schema gets its content from the Beer source entity type and is routable via URL The URL value will reflect the one in the source entity which is identical to the page URL in Umbraco We have also set up some actions The actions here will trigger a process of another schema Since our Beer is a child of Beers which will show a list of all its children Beer we need a way to update the view whenever its children Beer change This is done via the action type process In the process action we also need to provide an originId which is the ID of the source entity given upon ingest In Umbraco it reflects the page ID We want this originId to be the same as our current source entities Beer originParentId also given upon ingest here reflects the page s parent Beers So to sum up actions Every time one of our Beer views changes it triggers a processing of its parent here the Beers view Below we have properties which is the actual content Here we define a type that we will use for rendering logic in our frontend and the URL to the page which we will use to link to the individual beers on the overview page Last but not least we grab all the content we have from Umbraco for this page by using dynamic mapping We group all of this under content and map it all out by using p Beers schemaJust like the schema above we have defined triggers set route to URL and specified beers as the type under properties Under content there s suddenly a lot going on and even though it might seem complex at first it s actually quite simple when we go through it step by step Where we before had been working mapping out strings we now want to output an array So let s look at the structure First we define the type as an array The reason why you don t have to do this on strings is simply syntactic sugar since strings are the most commonly used property type Next is the input property This is where you wish to retrieve the collection from We use the lookup type to define a query like criteria that the source entities have to match The operator we want is the equal operator and the sourceEntityProperty we want to look at is originParentId This should matchValue of originId which here is the Beers originId So in other words We want to source entities that have Beers originId as their OriginParentId All the children of Beers Cool Now the last part the content The items field is used to map the results The type we are using here is a reference type which is used to reference another schema in this case the Beer schema we created before We reference another schema using the schemas alias which happens to also be beer Lastly we need to specify the ID of the source entity which is found under id and since we re looking for it inside one of the items we prepend it with item which then becomes item idAnd voilà We now have an array of all our beers Home schemaAnd now to relax with a simple schema We grab the home source entity type make it routable via URL set the type to home and dynamically map all the content under content Page schemaThis schema is structured the same way as the Home schema Navigation item schemaNow it s time to create our individual navigation items First we define which source entity types we want the navigation to consist of In our example we just want a very simple navigation consisting of only parent pages meaning not the individual beers We also don t want it to include our homepage since we will use the logo for navigating back to it Unlike our previous schemas we don t include a route since this schema only will work as part of our navigation schema and never will be called from the front end Under actions we do the same as we did in the Beer schema We tell it to process its parent whenever something new happens to views with source entity type page or beers The parent in this case the site node home For properties we grab the metaData name for the label the type we have given our other schemas and the url for href From Umbraco we also get a sortOrder which we can use to sort our navigation in the front end Navigation schemaJust like a decorative oriental rug it s time to tie it all together We use our root node home as our source entity type In route we will use handles since the navigation is a component that will be fetched throughout the website and not just a page However since we re building a multi site solution we need a way to differentiate the navigation for each site from the other We do this by appending the handle navigation with url which inserts the URL for home which is the root URL Inside properties we create an array that just like our Beers schema uses a reference to another schema here navigationItem That was the last schema we needed to create Now we just need to deploy our schemas so our brand new views can be generated Once you have deployed the schemas you can navigate to Generated views under Home to see the result Creating environment client s The last thing we need to do is to create one or more environment clients Well what is it one or more you ask Normally you have one environment client per website and as the same suggests per environment However we are building a multisite based on a single Next js instant which makes it a little different If you want to use Enterspeeds Routes API for instance to build a sitemap then you need individual environment clients If not then you can do it with just a single environment client So the choice is yours Don t worry we will show you how you can support multiple environment clients later on To create an environment client go to Settings and select Environment settings If you have done everything correctly then you should already see a list in the Domains section of all the domains you have entered in Umbraco under Culture and Hostnames If not then you need to manually create them and their hostnames But for now let s assume you ve done everything correctly well done Go to Environment clients and click Create Give your environment client a name and choose an environment Then click Create Next choose all the domains you want to attach to this environment client If you re planning on only using one then select them all Note If you add more sites in the future you need to go to edit the environment client and add these domains Now that we re ready to move on to the front end our Next js instance Here we will also meet a very famous red crustacean which unfortunately is not Zoidberg Setting up Next jsNow it s time to set up our front end For this we re going to use Next js Express and the secret sauce which makes it possible to use just a single Next js instance Krabs What is Krabs The author describes it as an enterprise ready Express js Fastify middleware for serving thousands of different websites from a single Next js instance Pretty freaking cool and with an awesome name nonetheless Shout out to Michele Riva for this awesome package Note Krabs forces you to use a custom server Therefore deployments to Vercel are not supported Krabs is also only supporting SSR at the moment and not SSG nor ISR First things first start by creating your Next app Next install Krabs and Express Note The steps for the Krabs configuration are borrowed from their documentation Create a new file called server js This will be the entry point for our custom Express js server which handles our Next js instance Next create a file called krabs js or krabs config js inside your project s root folder Krabs will automatically import the configuration from this file We have extended the standard configuration by also adding a property called enterspeedDomain The value for the enterspeedDomain should be the same as the one given in Enterspeed and Umbraco To actually see what we re doing we need to configure our hosts file Insert all the domain names you want to view in your local environment Awesome now to create the home for each website Inside your pages directory create a folder for each of your websites matching the name provided in the Krabs configuration file Note app and document pages are common to every website To test out that everything is working you can create an index js file with a simple hello world function for each of the websites To see the result run node server jsIf everything is working correctly you should now be able to view each website using the URL you entered in your hosts file and Krabs configuration Next let s create our connection to Enterspeed Create a file called enterspeed js We have a call function and a function for each route type getByHandle and getByUrl You will notice that we in the getByUrl function have extended the response with meta that way we can correctly handle errors Each of the functions calls our call function with a handle url and a tenant the website name configured in Krabs The reason why we include tenant is so we can differentiate between our websites and use a different environment client for each if we choose In our example we have simply used the same Next create an app js file in the pages directory Here we will get the tenant name website name the enterspeedDomain and also fetch our navigation In our App getInitialProps you ll see we fetch the navigation via getByHandle and we add the enterspeedDomain to the name which matches the route name we created in our navigation schema in Enterspeed The tenant and enterspeedDomain are then added to the pageProps which gets returned alongside the navigation These are now available in our App function In our App function you ll see we expand the tenant object to also include something called tenantDetails This is simply some extra layout configuration we ve added which also could have been done in Umbraco This is just to show how the front end developer could do this if they didn t have access to the Umbraco instance We ve chosen to add it in a separate file and not the Krabs configuration so as to not mix layout specific into the Krabs configuration Lastly we wrap the App Component with a component called MainLayout where we pass tenant and navigation as props Let s take a look at that component We ve made a simple layout based on the awesome UI framework Chakra UI but here s the neat part We could have used a completely different UI framework library for each of our sites without hurting the main performance Yes you read that correctly Talking about bringing power and flexibility to the developer No more internal battles between developers on which UI framework library to use No more trying to argue if Tailwind CSS is pure evil or not Just like an old Burger King commercial everybody gets it their way You are now able to choose the UI framework library that best fits the use case We can achieve this by using Next js Dynamic Import In our app js file instead of using the MainLayout component we could have used a unique component for each website based on the tenant name website name This could look like this Now let s look at how we could set up the pages We re going to use Next js Dynamic Routes more specifically their Optional catch all routes This will allow us to catch all routes and match them with the corresponding view in Enterspeed Inside each of your website folders create a file called slug jsIn our getServerSideProps function we hook into its context and grab the tenant domain and slug We pass these three variables on to the getByUrl function we wrote in our enterspeed js file which we set as our data variable We then check to see if data status is equal to if so we change the statusCode in our response object to and set our notFound variable to true The data and the notFound are then returned as props In our Content component we check to see if notFound is true if so we use Next js Error component if not we return our custom Entity component Our Entity component is responsible for rendering the correct components based on the type we defined in our schemas earlier You may be thinking Hmm but what if I want to have a custom layout for just one specific page Should I then create a whole new schema with its own unique type Nope Next js got your back Predefined routes always take precedence over dynamic routes This means if you want a unique layout for your Contact page you simply create a page called contact js and this will now respond to domain com contact Well to round things up let s look at how we would use our data to display a list of our beers All of the data has been passed to the view prop so all that is left is to map over our array of beers and render them in a nice grid view which will look like this The code which is based on Chakra UI could look something like this That s it We hope you enjoyed the article and it provided some inspiration on how microsites can be used Cheers	2022-07-14 14:50:16
海外TECH	DEV Community	How to Host your React App for Free. (Part 1)	https://dev.to/vamsitupakula_/how-to-host-your-react-app-for-free-part-1-2e6e	How to Host your React App for Free Part In this Blog we will see how to host a react JS app for free There are so many ways to host your app online for free but in this blog we will see how to host on github pages Hosting a normal html css and js files to github is very easy but when it comes to react js it is a bit tricky Let s get started Step First step we need to do is to add Homepage to package json homepage it you want to host to github user page homepage Step The next step you need to do is to install gh pages to install run the following command in the terminalnpm install save gh pagesthen add the following lines of code in your package json scripts predeploy npm run build deploy gh pages d build Step The very next step is to run the following commandnpm run deployNow you are done you have successfully hosted your react app on github Thank You for reading Also Read MongoDB beginner tutorialExpress JS getting started	2022-07-14 14:26:29
海外TECH	DEV Community	Everything you need to know about Parallelism, Threading, and Multi-threading in Python	https://dev.to/iayeshasahar/everything-you-need-to-know-about-parallelism-threading-and-multi-threading-in-python-3dg8	Everything you need to know about Parallelism Threading and Multi threading in Python IntroductionI guess everyone who opened this article has been coding for quite a while now You should have already come across use cases where you d want to speed up specific operations in some parts of your code right Well you re at the right place Today we ll talk about how to perform multiple tasks at the same time to speed up your code P S I ll be explaining while implementing in Python ParallelismVia Data science we deal with large amounts of data and extract useful insights from them Most of the time our operations on the data are easily parallelizable This means that different processing agents can run the particular operation on the data one piece at a time and then combine the results at the end to get the complete result This might not have made any sense so let s see a real world example of parallelizability to understand it For example it s your friend s wedding She wants you to bake a tier cake but you don t have a lot of time Generally you have to bake each tier one by one But if you have two other friends who help you then each of you can bake each tier In the latter part each of you is working parallelly on a part of the whole task This reduced the total time required to complete the task This parallel processing can be achieved in Python in ways like multiprocessing and threading ThreadingThread is a lightweight process or any task Now you might be wondering what is a process I ll explain it here since you will be seeing this word a lot A process is basically an instance of a computer program being executed Every single process has its own memory space it uses to store the instructions being run Any data it needs to store and access to execute is also in its own memory space Let s move back to our topic which is threading Threading is a method to add concurrency to your programs For example if your Python code is using multiple threads and you look at the processes running on your OS you would only see a single entry for your script even though it is running multiple threads In fact a Python process cannot run threads in parallel But the process can run them concurrently through context switching during I O bound operations This limitation is enforced by GIL GIL or the Python Global Interpreter Lock prevents threads within the same process to be executed at the same time It is of extreme importance because Python s interpreter is not thread safe It is enforced every time we attempt to access Python objects within threads At any given time only one thread can acquire the lock for a specific object Example Here s an example from time import sleep perf counterdef Task print Starting this task sleep print Task Completed start time perf counter Task Task end time perf counter print f It took end time start time f second s for the task to complete This is the output Starting this task Task Completed Starting this task Task Completed It took second s for the task to complete Explanation As expected the program took about two seconds to complete If we called the Task function times it would take about seconds to complete Let s break down what exactly happened Firstly the Task function executes It then sleeps for one second Then it executes another time and also sleeps for another second Finally the program execution is completed When our Task function calls the sleep function the CPU is idle In other words the CPU doesn t do anything This is not efficient in terms of resource utilization Our program has one process with a single thread which is our main thread Since it has only one thread it s called a single threaded program Multi threadingBy formal definition multithreading refers to the ability of a processor to execute multiple threads concurrently where each thread runs a process It is quite useful for IO bound processes such as reading files from a network or database since each thread can run the IO bound process concurrently But using it for CPU bound processes might slow down performance due to competing resources that ensure only one thread can execute at a time and overhead is incurred in dealing with multiple threads Let s take a look at an example to understand what it is and how we can create a multithreaded application ExampleIn order to create a multi threaded program you need to use the Python threading module from time import sleep perf counterfrom threading import Threaddef Task print Starting this task sleep print Task Completed start time perf counter create two new threadst Thread target Task t Thread target Task start the threadst start t start wait for the threads to completet join t join end time perf counter print f It took end time start time f second s for the task to complete Output Starting this task Starting this task Task Completed Task Completed It took second s for the task to complete Explanation When we execute the program there will be three threads the main thread is created by the Python interpreter two threads are created by the program As the output shows the program took one second instead of two to complete A brief intro to MultiprocessingIt refers to the ability of a system to run multiple processors concurrently where each processor can run one or more threads It is useful for CPU bound processes such as computationally heavy tasks since it will benefit from having multiple processors It s pretty similar to how multicore computers work faster than computers with a single core Multiprocessing might lead to higher CPU utilization due to multiple CPU cores being used by the program which is kinda expected How are Python Multi threading and Multiprocessing Related Multithreading and multiprocessing both allow our Python code to run concurrently But only one of them multiprocessing will allow your code to be truly parallel Whereas if your code is IO heavy like HTTP requests then multithreading will still probably speed up your code Why Multithreading Is Always Not The Solution Everything has some pros and cons Just like that multithreading also has some disadvantages that you really shouldn t ignore For example You really DON T want to use it for basic tasks because there is overhead associated with managing threads It actually increases the complexity of the program So if the program is more complex debugging will become more difficult Writing applications that have multithreading are not easy to write so only experienced programmers should do this This is definitely NOT for beginners Managing concurrency among threads is very difficult It also has the potential to introduce new bugs or we can say features into an application Why Parallel Computing or Parallelism Is Always Not The Solution Parallelism to a program is not always useful Here are some pitfalls that you NEED to be aware of Livelock It occurs when threads keep running in a loop but don t make any progresspoor designimproper use of mutex locks Starvation It occurs when a thread is denied access to a particular resource for longer periods of time so the overall program slows down This situation might be a result of an unintended side effect of a poorly designed thread scheduling algorithm Race Condition As I shared before threads have a shared memory space and so they can have access to shared variables This situation occurs when multiple threads try to change the same variable simultaneously The thread scheduler can arbitrarily swap between threads so we have no way of knowing the order in which the threads will try to change the data This can result in incorrect behavior in either of the threads especially if the threads decide to do something based on the value of the variable In order to prevent this a mutual exclusion or mutex lock can be placed around the piece of the code that modifies the variable If this is done then only one thread can write to the variable at a time Deadlock Overuse of anything is not good Just like that overusing mutex locks also has a downside It can introduce deadlocks in the program It is basically a state when a thread is waiting for another thread to release a lock but that other thread needs a resource to finish that the first thread is holding onto This situation results in both threads coming to a standstill and the program stops We can think of deadlocks as extreme cases of starvation In order to avoid this situation don t introduce too many locks that are interdependent So What Exactly Should You Use Multithreading is your best friend because of its low overhead if your code has a lot of I O or Network usageMultithreading should be used if you have a GUI so your UI thread doesn t get locked upUse multiprocessing if your code is CPU bound But only if your machine has multiple cores Anyways just use whatever you think would work best according to your code ConclusionThese OS related concepts are pretty advanced but extremely important if you wanna be a pro developer Take your time to go through these concepts No need to fuss if you don t understand them in the first go Even pro programmers have difficulty implementing them So take your time use multiple resources if needed and practice Let s connect Twitter Github	2022-07-14 14:10:18
Apple	AppleInsider - Frontpage News	OWC Envoy Pro SX 4TB review: Compact & understated design hides fast speeds	https://appleinsider.com/articles/22/07/14/owc-envoy-pro-sx-4tb-review-compact-understated-design-hides-fast-speeds?utm_medium=rss	OWC Envoy Pro SX TB review Compact amp understated design hides fast speedsOWC s Envoy Pro SX offers high speed external storage in a protective and muted casing and is a solid choice for expanding storage on a Mac without paying Apple s premium One of the core problems of owning a MacBook Air or Pro is ensuring you have enough storage Upgrades at initial purchase are expensive and unless you ve got a Mac Pro you can t do anything about internal storage further down the line While all Macs can benefit from having a fast external drive connected ideally portable hardware like the MacBook Pro also needs the drive to be compact light and easy to move around The OWC Envoy Pro SX attempts to answer the call with fast data transfers in a reasonably small and secure package Read more	2022-07-14 14:46:08
Apple	AppleInsider - Frontpage News	M2 MacBook Air review roundup: This is the Mac you're looking for	https://appleinsider.com/articles/22/07/14/m2-macbook-air-review-roundup-this-is-the-mac-youre-looking-for?utm_medium=rss	M MacBook Air review roundup This is the Mac you x re looking forThe M MacBook Air ships on Friday and early reviews say it is the best ultraportable Mac and is the right choice for most people The M MacBook Air revolutionizes the thin and light laptopThe M MacBook Air is a new take on Apple s most popular laptop with a redesigned case larger display and the latest Apple Silicon processor It became available for preorder on July and begins shipping to customers on Friday Read more	2022-07-14 14:21:51
海外TECH	Engadget	Amazon promises fairer seller program to avoid EU fines	https://www.engadget.com/amazon-buy-box-prime-marketplace-seller-eu-changes-143402811.html?src=rss	Amazon promises fairer seller program to avoid EU finesAmazon is making some significant commitments in an attempt to escape EU fines for allegedly misusing seller data The European Commission is asking for public feedback on Amazon proposals that theoretically give third party sellers a better chance of competing with Amazon s direct sales The company has pledged to avoid using private seller data in situations where there s competition with Marketplace shops whether it s obtained through automated tools or employee access The firm has also promised quot non discriminatory quot terms for third parties selling to Prime subscribers including a choice in delivery and logistics services Amazon also won t use participants Prime data to give its own logistics a boost according to one proposal In another commitment Amazon vowed quot equal treatment quot when ranking sellers in the Buy Box section that lets you quickly purchase goods Runners up will also have a better chance at grabbing your attention ーyou ll see a second offer in the Buy Box if it s substantially different in terms of price or delivery Comments on the proposals will remain open until September th Whatever conditions the EU accepts they ll remain in effect for five years with oversight by a trustee reporting to the Commission They would also cover all of the European Economic Area although the Buy Box and Prime changes wouldn t apply to Italy when the country already demanded changes to Amazon s behavior In a statement Amazon told Engadget it still felt the EU was quot unfairly quot targeting the company with legal efforts like the Digital Markets Act but that it quot engaged constructively quot with regulators to address issues You can read the full response below It previously denied allegations in an April Wall Street Journalreport that it misused third party seller data to launch competing products and said the practice was against its policies However it caught flak from the US House Judiciary Committee for purportedly withholding documents and obstructing an investigation into its practices The internet giant maintained that it offered quot good faith cooperation quot with the House inquiry Should the Commission greenlight the proposals they could bring an end to a long saga The EC opened an antitrust investigation in July over concerns Amazon might have been using sensitive Marketplace info to give itself an unfair advantage and in November offered a preliminary stance that Amazon shouldn t rely on those merchants business data to refine its sales strategy With that said Amazon won t avoid further trouble even if the EU deal moves forward It s still facing a reported SEC investigation in the US not to mention a Senate bill meant to help third parties selling through platforms like Amazon quot While we have serious concerns about the Digital Markets Act unfairly targeting Amazon and a few other U S companies and disagree with several conclusions the European Commission made we have engaged constructively with the Commission to address their concerns and preserve our ability to serve European customers and the more than European small and medium sized businesses selling through our stores No company cares more about small businesses or has done more to support them over the past two decades than Amazon quot	2022-07-14 14:34:02
海外TECH	Engadget	Sony’s first PlayStation loyalty program rewards you for earning trophies	https://www.engadget.com/playstation-stars-loyalty-program-rewards-discounts-sony-142823193.html?src=rss	Sony s first PlayStation loyalty program rewards you for earning trophiesSony has announced its first PlayStation loyalty program PlayStation Stars will be free to join and you can earn points by playing games and making purchases on the PlayStation Store You ll be able to redeem those points for things like PSN wallet funds and certain products from the store There will be a quot Monthly Check in quot program that will enable you to earn a reward by playing any game Sony plans to offer rewards to those who win tournaments and earn certain trophies The first player to earn a platinum trophy for a certain game in their time zone will earn a reward too One aspect of the program ruffled some feathers on social media after the announcement Sony says it will offer digital collectibles as rewards These are quot digital representations of things that PlayStation fans enjoy including figurines of beloved and iconic characters from games and other forms of entertainment as well as cherished devices that tap into Sony s history of innovation quot It said fans will always have collectibles to earn and there will be quot ultra rare quot ones Calling them quot digital collectibles quot certainly makes them sound like NFTs but that s not the case “It s definitely not NFTs Definitely not quot Grace Chen Sony Interactive Entertainment s vice president of network advertising loyalty and licensed merchandise told The Washington Post quot You can t trade them or sell them It is not leveraging any blockchain technologies and definitely not NFTs quot If only Sony had clarified that in its own blog post to avoid confusion PlayStation Stars follows similar reward offerings from Microsoft and Nintendo Microsoft s program which is now called Microsoft Points has been around for many years Along with earning points by playing Xbox users can accrue them by searching on Bing and buying products Similarly folks can snag My Nintendo Gold Points by making purchases from the eShop and performing well in tournaments They can be used for discounts on Switch games For completing various tasks you can also earn platinum points which are redeemable for rewards Sony says it will build out PlayStation Stars over time It s currently testing the program and it s planning a phased rollout later this year More details will be revealed in the coming months	2022-07-14 14:28:23
海外科学	BBC News - Science & Environment	Albatross-inspired glider designed for Mars flight	https://www.bbc.co.uk/news/science-environment-62041095?at_medium=RSS&at_campaign=KARANGA	seabird	2022-07-14 14:41:23
金融	RSS FILE - 日本証券業協会	株券等貸借取引状況（週間）	https://www.jsda.or.jp/shiryoshitsu/toukei/kabu-taiw/index.html	貸借	2022-07-14 15:30:00
金融	金融庁ホームページ	マニュライフ生命保険株式会社に対する行政処分について公表しました。	https://www.fsa.go.jp/news/r4/hoken/20220714-1/20220714-1.html	行政処分	2022-07-14 16:00:00
金融	金融庁ホームページ	節税（租税回避）を主たる目的として販売される保険商品への対応における国税庁との更なる連携強化について公表しました。	https://www.fsa.go.jp/news/r4/hoken/20220714-2/20220714-2.html	租税回避	2022-07-14 16:00:00
金融	ニュース - 保険市場TIMES	AIG損保、三井不動産「＆Resilience」とコラボレーション開始	https://www.hokende.com/news/blog/entry/2022/07/15/000000	AIG損保、三井不動産「Resilience」とコラボレーション開始「中小企業強靭化プロジェクト」の一環AIG損害保険株式会社以下、AIG損保は「中小企業強靭化プロジェクト」の一環として、三井不動産株式会社の定額・会員制コンサルティングサービス「Resilience」とのコラボレーションを、年月日より開始すると発表した。	2022-07-15 00:00:00
ニュース	BBC News - Home	Ukraine war: 22 killed in Russian rocket attack on Vinnytsia	https://www.bbc.co.uk/news/world-europe-62163071?at_medium=RSS&at_campaign=KARANGA	vinnytsia	2022-07-14 14:23:04
ニュース	BBC News - Home	Train drivers to go on strike on 30 July	https://www.bbc.co.uk/news/business-62166276?at_medium=RSS&at_campaign=KARANGA	companies	2022-07-14 14:46:35
ニュース	BBC News - Home	BBC sets out plans for TV news channel merger in 2023	https://www.bbc.co.uk/news/entertainment-arts-62161868?at_medium=RSS&at_campaign=KARANGA	channels	2022-07-14 14:42:54
ニュース	BBC News - Home	Prince Andrew: BBC's Newsnight interview to be turned into a film	https://www.bbc.co.uk/news/entertainment-arts-62161864?at_medium=RSS&at_campaign=KARANGA	newsnight	2022-07-14 14:23:13
ニュース	BBC News - Home	Tory leadership race: Suella Braverman knocked out in latest vote	https://www.bbc.co.uk/news/uk-politics-62168579?at_medium=RSS&at_campaign=KARANGA	boris	2022-07-14 14:50:36
ニュース	BBC News - Home	Who will replace Boris Johnson?	https://www.bbc.co.uk/news/uk-politics-60037657?at_medium=RSS&at_campaign=KARANGA	minister	2022-07-14 14:17:00
ニュース	BBC News - Home	Tory leadership contest: Liz Truss quizzed after criticism flies in race to No 10	https://www.bbc.co.uk/news/uk-politics-62164067?at_medium=RSS&at_campaign=KARANGA	battle	2022-07-14 14:18:14
ニュース	BBC News - Home	Tory leadership: Do rivals' tax pledges add up?	https://www.bbc.co.uk/news/uk-politics-62122166?at_medium=RSS&at_campaign=KARANGA	contenders	2022-07-14 14:13:53
ニュース	BBC News - Home	Tory leadership: What candidates think about Northern Ireland Protocol	https://www.bbc.co.uk/news/uk-northern-ireland-62118436?at_medium=RSS&at_campaign=KARANGA	brexit	2022-07-14 14:14:27
北海道	北海道新聞	ＮＹ株、一時６００ドル超安　１％の大幅利上げ警戒	https://www.hokkaido-np.co.jp/article/705897/	警戒	2022-07-14 23:20:10
北海道	北海道新聞	根室覆った真っ赤な炎「これが戦争」　６歳の少女が見た空襲、焼け落ちた繁華街	https://www.hokkaido-np.co.jp/article/705850/	近く	2022-07-14 23:34:03
北海道	北海道新聞	藤丸再生道筋見えず　地域の象徴　経済へ影響懸念　「そら」は水面下で地権者と交渉	https://www.hokkaido-np.co.jp/article/705905/	私的整理	2022-07-14 23:29:00
北海道	北海道新聞	五輪誘致、機運醸成目指す　札幌市などの競技団体連絡会議が再開　３０年大会へ連携確認	https://www.hokkaido-np.co.jp/article/705785/	競技団体	2022-07-14 23:15:19
北海道	北海道新聞	根室と黒部の小学校、オンラインで交流授業　北方領土問題も伝える	https://www.hokkaido-np.co.jp/article/705795/	北方領土問題	2022-07-14 23:13:00
北海道	北海道新聞	通行止め解除で物流、観光正常化　美笛―大滝の国道２７６号	https://www.hokkaido-np.co.jp/article/705900/	札幌開発	2022-07-14 23:11:00