投稿時間:2022-03-06 03:16:15 RSSフィード2022-03-06 03:00 分まとめ(20件)

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AWS	AWSタグが付けられた新着投稿 - Qiita	AWS Hands-on for Beginners　Network編#3	https://qiita.com/gazami_shougun/items/d05f295f3dd89c5fbaee	easyrsabuildcanopass公開されている中間認証局を使用せずに、自分で認証局を作成して証明書を発行することもできます。	2022-03-06 02:08:43
海外TECH	Ars Technica	The weekend’s best deals: Nintendo eShop gift cards, Paramount Plus, and more	https://arstechnica.com/?p=1838329	google	2022-03-05 17:17:01
海外TECH	MakeUseOf	How to Use ROUND Functions in Google Sheets	https://www.makeuseof.com/use-round-functions-google-sheets/	decimal	2022-03-05 17:30:14
海外TECH	MakeUseOf	How to Use Hive for Task and Project Management	https://www.makeuseof.com/use-hive-for-task-project-management/	friendly	2022-03-05 17:30:13
海外TECH	MakeUseOf	7 Ways to Fix Windows Defender When It’s Grayed Out	https://www.makeuseof.com/windows-defender-grayed-out-fix/	doesn	2022-03-05 17:16:13
海外TECH	DEV Community	ترفند های افزایش ویو اینستاگرام	https://dev.to/maxadir/trfnd-hy-fzysh-wyw-ynstgrm-46g3	ترفندهایافزایشویواینستاگرام نکتهطلاییبرایافزایشویواینستاگرامالگوریتماینستاگرامنسبتبهسال‌هایگذشتهتغییرکردهاستواگرقصدداریدجهتافزایشویواینستاگراماقدامکنید،نبایدازترفندهایقدیمیاستفادهکنید تغییرالگوریتماینستاگرامنبایدانگیزهشمادراستفادهازاینپلتفرمراکمکند شمابایدازجدیدترینترفندهایموثردرافزایشویواستفادکنیدتابتوانیدمحتوایخودرابهافرادبیشترینمایشدهید بهگزارشبرنا،الگوریتماینستاگرامنسبتبهسال‌هایگذشتهتغییرکردهاستواگرقصدداریدجهتافزایشویواینستاگراماقدامکنید،نبایدازترفندهایقدیمیاستفادهکنید تغییرالگوریتماینستاگرامنبایدانگیزهشمادراستفادهازاینپلتفرمراکمکند شمابایدازجدیدترینترفندهایموثردرافزایشویواینستاگراماستفادکنیدتابتوانیدمحتوایخودرابهافرادبیشترینمایشدهید دراینمقالهترفندهایجدیدیکهباتوجهبهالگوریتم‌هایجدیداینستاگرامتستشدهاسترامعرفیخواهیمکرد،پستاآخرباماهمراهباشید برایافزایشویواینستاگرامبایدتواناییتولیدعکس‌هاوویدیوهایباکیفیتراداشتهباشید گرفتنعکس‌هایخلاقانهوباکیفیتکاملاواضحاستکهاینستاگرامیکاپلیکیشنمبتنیبرتصاویروویدیواست،بنابراینبرایافزایشویواینستاگرامبایدتواناییتولیدعکس‌هاوویدیوهایباکیفیتراداشتهباشید هنگامتولیدمحتوایخودبهتمپیجوپست‌هایخودتوجهکنید،بایدیکتمرنگیثابترادرپیجپیادهکنید همچنینبایدعکس‌هاییکهمنتشرمی‌کنیدباکپشنمرتبطباشیدوهردوارزشیرابهکاربرمنتقلکنند یعنییکمحتواکهبرایماربرمفیدباشدراتولیدکنیدتاتعاملکاربربامحتوایشماافزایشیابد خلاقیتبیشتربخوانید برفرازاراکنمایشدواثرفیلمسازگیلانیدرجشنوارهمدیاویومجارستانyektanet comتولیدکردنمحتوادرهرپلتفرمیاگرباخلاقیتهمراهنباشدصرفاباعثهدررفتنوقتوهزینهخواهدشد محتواینووخلاقانهسببتبدیلفالوورهابهطرفداراندائمییکبرندیایکپیجمی‌شود استوریاینستاگرامیکیازمحل‌هایمناسببرایانتشارانواعمحتوایخلاقانهاست دراستوریبااستفادهازباکس‌هایپرسشوپاسخازفالوورهایتانسوالکنیدوازعلایقآنهاباخبرشوید همچنینمی‌توانیدبااستفادهازاستیکرهایمختلفتعاملکاربرانبااستوریراافزایشدهیدویاسوال‌هایچالشبرانگیزبپرسیدوآنهاراواداربهتعاملکنیدتاافزایشافزایشویواینستاگرامازاینطریقاتفاقبیفتد افزایشویواینستاگرامبااستفادهازباکس‌هایپرسشوپاسخازفالوورهایتانسوالکنیدوازعلایقآنهاباخبرشوید خریدبازدیداینستاگرامبکراهسریعومطمئنبرایافزایشویواینستاگرامخریدویوازبرخیفروشگاه‌هایمعتبرماننددریچه است ازاینفروشگاهمی‌توانیددرتعدادمختلفبازدیدهایواقعیراخریدارینمایید بازدیدهایواقعیسرعترشدپیجاینستاگرام‌تانراافزایشمی‌دهد بازدیدواقعیاستکهتبدیلبهمشتریخواهدشدوبرایشمادرآمدزاییخواهدداشت نگرانهزینه‌هایخریدویواینستاگرامنباشیدچراکهاینفروشگاهویوهایواقعیراباقیمتمناسبارائهکردهاست بهصورتمنظممحتوایتانرامنتشرکنیدهرچندوقتیکباردراینستاگرامپستیااستوریمیگذارید؟اگرهرروزحداقلیکپستوسهاستوریرادرپیج‌تانمنتشرنمی‌کنید،نبایدانتظارافزایشویواینستاگرامراداشتهباشید درحالحاضراستوریاینستاگرامروزانهحداقل میلیونکاربردارد منتشرکردنمستمرومنظممحتواباعثمی‌شوداینستاگرامپیجشمارایکپیجفعالدرنظربگیردومحتوایشمارابهافرادبیشترنمایشبدهد تگلوکیشنتگلوکیشنیکیازمواردیاستکهبیشترافرادبهآناهمیتنمی‌دهندواستفادهنمی‌کنند،درحالیکهتگلوکیشنهمدرپست‌هاوهمدراستوری‌هامیزاندسترسیپذیریمحتوای‌تانراافزایشمی‌دهد بسیاریازافراددراینستاگرامبراساسمنطقهیاشهرمحتوا‌هایخودراجتسجومی‌کنند بنابراینمنطقیاستکهازهمهامکاناتاینستاگرامبرایافزایشبازدیدمحتواهای‌ماناستفادهکنیم افزایشویواینستاگرامبسیاریازافراددراینستاگرامبراساسمنطقهیاشهرمحتوا‌هایخودراجتسجومی‌کنندنوشتنکپشن‌هایطولانیاینستاگراماجازهنوشتنکپشنتا کاراکتررامی‌دهد بنابراینبهاندازهکافیفضابرایتوضیحاتدرموردویدیویاتصاویروجوددارد کپشنطولانیکاربررابهمدتزیادیبررویپستشمانگهمی‌داردواینتعاملکاربرباپستراافزایشمی‌دهد اینستاگرامازاینطریقمی‌فهمدکهاینمحتوایکمحتوایمفیداستوآنرابهافرادبیشترینمایشمی‌دهد نکته‌‌ایکهبایدتوجهکنیدایناستکهبایدکپشنشاملاطلاعاتمفیدیباشد نبایدازمحتواینامربوطویاجملاتالکیدرکپشناستفادهکنید،اینکارارزشپست‌هایشماکاهشمی‌دهدوکاربردفعاتبعدیکپشن‌پست‌شمارانمی‌خواند برنامهریزیبرایپست‌هایاینستاگراماگربهاندازهکافیمحتوامنتشرنمی‌کنیدویادرزمانمناسبمحتوایخودرامنتشرنمی‌کنید،میزانتعاملپیج‌تانراکاهشدادهوبازدید‌هاکمتریخواهیدداشت شمامی‌توانیدباانتشارمحتوادرساعاتمختلفوبررسیقسمتInsight اکانتخود،یهترینزمانبرایانتشارپسترابیابید اینکارباعثمی‌شودبفهمیدچهزمانیفالوور‌هایشمابیشتردراینستاگرامفعالهستند ابزارinsight یکیازمفیدترینابزارهاییاستکهجهتافزایشویواینستاگراممی‌توانیداستفادهکنید باپیج‌هایبزرگترتعاملبرقرارکنیدساختاراینستاگرامبرپایهتعاملافرادبایکدیگراستوبرایجلبتوجهبیشتربایدفعالیتوتعاملخودراافزایشدهید یکیازراه‌هایایجادتعامل،دنبالکردنپیج‌هایبزرگدرحوزهخودتاناست بااینپیج‌هاارتباطبرقرارکنید،درموردمحتواهای‌شاننظربدهیدوپست‌هایشانرالایککنید همچنینمی‌توانیدنظراتجنجالییاکنجکاوکننده‌ایرازیرپست‌هایپربازدیدآنهابنویسید ممکناستصاحبانپیج‌هایبزرگنظرشمارانبینندامافالوورهایآنهاخواهنددید اگرنظریاکامنتشمابهاندازهکافیآنهاتحریککندویابهفکروادارد،ازپیجشمادیدنخواهندکرد سپسممکناستشمارادنبالکنندویامحتوایشماراببینند افزایشویواینستاگرامبرایجلبتوجهبیشتربایدفعالیتوتعاملخودراافزایشدهیدازهشتگ‌هایمناسباستفادهکنیدحتماپیج‌هاییرادیده‌ایدکهازهمه هشتگیکهاجازهدارند،درمحتوایخوداستفادهمی‌کنندوبیشتراینهشتگ‌هاهمنامربوطبهمحتوایپستاستوصرفابهدلیلدریافتبازدیدبیشترچنینکاریمی‌کنند بایدبدانیدکهایناستراتژیکارنخواهدکرد اینکارمحتوارابهیکمحتواهرزواسپمتبدیلمی‌کندوباعثمی‌شودکهکاربراناینپسترابهاینستاگرامگزارش Report دهند هشتگ‌هایعمومیبزرگراباهشتگ‌هایکوچکترکهمربوطبهحوزهکاریشماستترکیبکنیداگرمی‌خواهیدازهشتگ‌هابازدید‌هایمرتبطوزیادبدستآورید،بایدهشتگ‌هایعمومیبزرگراباهشتگ‌هایکوچکترکهمربوطبهحوزهکاریشماستترکیبکنید هشتگ‌هاعمومیلایک‌هاوبازدیدهایبیشتریبهسویپیج‌تانروانهمی‌کننداماهشتگ‌هایتخصصیوکوچک،باعثجذبفالوور‌هاییمی‌شودکهبهمحتوایشماعلاقه‌مندهستند استفادهازمنشنیکیازراه‌هایرسیدنبهافزایشویواینستاگرام،منشنکردنپیج‌هایهمکارانوپیج‌هایمرتبطباحوزهکاریشماست اینباعثایجادتعاملباآنهامی‌شودودرمرحلهبعدممکناستشماآنهااستوریشمارادرپیجخودشاندوبارهبهاشتراکبگذارندوازاینطریقفالوورهایآنهاباشماارتباطبرقرارکنند هرکسیمی‌تواندبااستفادهازیکاستراتژیمناسببهموفقیتدراینستاگرامدستپیداکند نکاتیکهگفتیمچندروشاثباتشدهدرکنارخریدبازدیداینستاگرامبرایافزایشویووافزایشتعاملاست اگرنظریدرمورداینمقالهداریددرقسمتدیدگاه‌هابامادرمیانبگذارید خریدبازدیدواقعی	2022-03-05 17:29:10
海外TECH	DEV Community	Controlling React API Calls With Hooks	https://dev.to/bytebodger/controlling-react-api-calls-with-hooks-a79	Controlling React API Calls With HooksI love React But there are some aspects of the framework that have previously given me fits One of those aspects is in the mindful controlling of API calls from within a React app How many times have you witnessed this scenario You load a React app in the browser and because you re a frontend developer you find yourself opening the Inspector Tools and looking at the API asynchronous calls that are made from the app That s when you notice something fishy The app makes a simple GET request to some endpoint to get some batch of basic data Often that data looks like it s the kind of data that rarely if ever changes And yet the app is making two or three or more calls to the exact same endpoint And in each of those calls it s retrieving the exact same data Nearly every time I witness this I know exactly why it s happening Because the developers didn t understand how to properly control the API calls being launched from their own app To be fair this is an extremely common fault in many React apps that I see And it s so common for one very basic reason React does a very poor job of guiding devs on how to make imperative calls To put it more succinctly React tends to gloss over the problem that arises when you need to perform a single operation at a very specific time and to ensure that this operation occurs ONLY ONCE By default React doesn t really want you to think in imperative terms It constantly pushes you to program in a declarative fashion And to be clear that s normally a very good thing But there are SOME things that just don t fit cleanly into a declarative model and an API call is definitely one of those scenarios This drives me nuts Because there are certain API calls that really should only be performed once or under very specific conditions So I deem it to be an act of performance malpractice when an app repeatedly calls for the same data often before the user has had any opportunity to even interact with the data in any way Apollo NightmaresBefore I get into my solution I wanna say a quick word about Apollo This seems to be the default package that most devs reach for when they re managing GraphQL calls And that s ok But IMHO it has a major downfall All of its default documentation tries to drive you to build your API calls declaratively And for many different data calls this is borderline silly I wrote an entire article about this You can read it here Full Disclosure It s entirely possible to manage your Apollo GraphQL calls imperatively But you gotta spend a lot of time digging around their docs to figure out how to get it right And this drives me crazy React s rendering cycle driven by the reconciliation process typically feels very black box to most devs Even for a seasoned React dev it can be difficult to say exactly when the render cycle will be invoked And this is why I despise Apollo s default approach Because API calls are definitely one aspect of your app that you should never be blindly handing over to the inner workings of React s reconciliation process I wrote an entire article about the reconciliation process You can read it here So I m not telling you to scrap Apollo with its preferred declarative syntax But if you re reading the rest of this tutorial and wondering Why don t you just use Apollo This is why When I m writing a responsive asynchronous application I ve never found it satisfactory to simply surrender all of my API calls to the vagaries of the rendering cycle Just Use SagaI m pretty much on record as being a Redux Curmudgeon You can read my complete rant on the subject here But I fully understand that many React shops are already thoroughly ensconced in Redux So if your project already uses Redux then I can safely say that you should be using Saga to manage your API calls It s specifically designed to handle side effects and the first side effects it illustrates right on its homepage are API calls So if you re already well versed with Redux Saga I doubt I m going to show you anything here that will trump that bit of entrenched technology Use it It s pretty cool But what if you re not already a Redux shop And what if you don t wanna introduce all of Redux s built in overhead just so you can cleanly manage a handful of API calls Well there s good news You can do this quite simply with Hooks Forbidden KnowledgeOK so I ve said that this is simple But that doesn t necessarily mean that it s obvious In fact a few years ago I spent a great deal of time on the interwebs trying to figure out how to properly manage my API calls without invoking the demon that is Redux Sounds like a simple task yeah But strangely enough the more I searched for the solution the more exasperated I became with the solutions that I saw proposed on various sites and blogs So I m going to walk you through exactly how I manage API calls whenever I m given the freedom to choose my own approach The Basic Setup Before I begin you can see all this code live and working here We re gonna start with a dead simple React app structured like so public src common functions get axios js load shared hooks js hooks use reservations endpoint js objects use js App js index js Reservations js UI js package jsonObviously you don t have to use my file structure Rearrange as you see fit This demo is built with create react app Again you obviously don t need to use that This can be done in a custom Webpack build just fine I m going to start at the top of the app and just walk you through any pertinent points package json name react version private true dependencies toolz use constructor axios react react dom scripts start react scripts start build react scripts build test react scripts test env jsdom eject react scripts eject devDependencies react scripts latest Pretty standard stuff here I ll only point out two features I m using my custom toolz use constructor NPM package You can read all about it here You can write the functionality for this package out manually if you like It just ensures that we can invoke an API call under a traditional constructor like mindset meaning that the code will run once and only once That s where we re going to call our API I m using the Axios package to invoke asynchronous calls You can use any approach that works for you even if you re just doing old skool plain ol JavaScript asynchronous calls index jsMove along folks Nothing to see here This is just the default index js file that you get when you spin up a new Create React App All it really does is invoke lt App gt App jsimport React from react import loadSharedHooks from common functions load shared hooks import UI from UI export default function App loadSharedHooks return lt UI gt I typically put almost no real logic in App js It merely serves as a launching point for the real app In this component I m just calling lt UI gt and I m calling loadSharedHooks Here I m using an approach that allows me to truly share global state between any all components using nothing more than core React with Hooks No Redux No other third party shared state package Just React Hooks You can read all about this approach in this article common functions load shared hooks jsimport use from objects use import useReservationsEndpoint from hooks use reservations endpoint export const loadSharedHooks gt use reservationsEndpoint useReservationsEndpoint This is a dead simple function First I create a custom Hook for every endpoint that I ll be hitting And then I place a single instance a singleton of that endpoint into the use object This places the API calls outside the standard React reconciliation process It allows me to control with pinpoint accuracy when any particular API call fires It also allows me to then access the values from those APIs across all other components in the app It s important that I m calling loadSharedHooks right at the top of the app By calling it there I ensure that any endpoints I ve loaded with loadSharedHooks are readily available to me wherever whenever I need them during the application s execution Wondering what s inside that use object It looks like this common objects use jsexport const use That s it That s the entire use js file It s just a plain ol JavaScript object The key is that by invoking it at the top of the application I can then reference the values inside use anywhere anytime that I want In this case the endpoint I m hitting will be saved into use common hooks use reservations endpoint jsimport getAxios from functions get axios import useState from react export const useReservationsEndpoint gt const reservations setReservations useState const axios getAxios const loadReservations async gt const response await axios call GET if response status setReservations response data return loadReservations reservations This code manages the single endpoint that we re using for this demo The actual call is handled in loadReservations It leverages my custom axios wrapper I m not going to outline the axios wrapper here You can peruse it in the StackBlitz demo if you like If this were a full app I d have functions inside the axios wrapper for POST PUT and PATCH operations But for this simple demo the wrapper only contains code for a GET call Notice in this endpoint Hook that I only return the values for loadReservation and reservations reservations contains the data that s returned from the endpoint loadReservations allows us to invoke the GET operation without needing to write out the full asynchronous code within the body of our components setReservations is not returned This keeps the downstream components from trying to access update the endpoint values directly without utilizing this custom Hook UI jsimport React from react import useConstructor from toolz use constructor import use from common objects use import Reservations from Reservations export const UI gt useConstructor gt use reservationsEndpoint loadReservations return lt Reservations gt lt UI gt doesn t do much On the surface it just seems to call lt Reservations gt But there s one critical feature here It leverages useConstructor to load once and only once the loadReservations call This ensures that we re not loading the reservations endpoint every time the app performs a re render Once that s been accomplished it simply renders lt Reservations gt Reservations jsimport React useState from react import use from common objects use export const Reservations gt const index setIndex useState const reservationsEndpoint use reservationsEndpoint const displayCurrentReservation gt if reservationsEndpoint reservations length return null const reservation reservationsEndpoint reservations index return lt gt lt br gt lt div gt Room Name reservation room name lt br gt Start Datetime reservation start lt br gt End Datetime reservation end lt div gt lt br gt lt gt const displayNextButton gt if reservationsEndpoint reservations length index reservationsEndpoint reservations length return null return lt gt lt button onClick gt setIndex index gt Next lt button gt lt gt const displayPreviousButton gt if reservationsEndpoint reservations length index return null return lt gt lt button onClick gt setIndex index style marginRight gt Previous lt button gt lt gt return lt gt lt div gt reservationsEndpoint reservations length reservations found lt div gt lt div gt Current showing reservation index lt div gt displayCurrentReservation displayPreviousButton displayNextButton lt gt Obviously this is the meat of the application Here s a quick synopsis of what it accomplishes It sets a state variable for index so we always know which reservation we re looking at It accesses the reservationsEndpoint which was previously loaded with loadSharedHooks It then displays the total number of reservations retrieved the index of the current reservation and some basic info about the reservation itself It also shows Previous and Next buttons that allow you to cycle forward or backward through the existing reservations TakeawaysIf you open the Inspector Tools while viewing the StackBlitz demo you ll see that the GET to the reservations endpoint is only ever called once Even when you use the Previous or Next buttons the GET call is never repeated even though the state for lt Reservations gt is updated and the component is repeatedly re rendered This was done without any third party packages No Redux or Redux Saga No Apollo No other third party state management tools The API call is never dependent upon the React reconciliation process meaning that we used neither the lifecycle methods inherent in class based components nor the confusing mess of dependencies that are spawned with useEffect The biggest takeaway I d like you to embrace is that API calls should always be tightly controlled Your app shouldn t be repeatedly calling the same endpoint for the same data	2022-03-05 17:25:47
海外TECH	DEV Community	XARGS only makes your life easier	https://dev.to/femolacaster/xargs-only-makes-your-life-easier-97i	XARGS only makes your life easierOne command line tool that would make your life easier is the xargs command So what is xargs xargs is part of the Findutil package of the GNU project which builds and executes commands using arguments read from standard inputs What are Standard Inputs in Linux Standard inputs are just a bunch of text on the command line either read from a file or keyboard that makes up a Linux command So let us examine the seq command here which prints out in a new line a sequence of numbers I recommend you create a new directory in your home directory preferably for this tutorial Let s play mkdir tutorial seq The arguments read for the standard input of this command is just While for this command seq The arguments read for the standard input of this command above are and Now that you understand what standard input is you might want to supply it as an argument to a new command Maybe because you don t want to presume the arguments being read beforehand or maybe because the argument list is just too long and typing would be a waste of time That is where xargs comes in We can combine these arguments using xargs with all commands that there is on Linux with this syntax command xargs commandLet us try xargs with the echo command seq xargs echo seq xargs echo And the default of the xargs command is echo anyway so you don t need to include it seq xargs seq xargs And the touch and mkdir command seq xargs I touch version txt lsversion txt seq xargs I mkdir v lsv v version txtIn the commands above we introduce a new option I which replaces the character as a placeholder for the arguments read from the standard input and even included more prefix and suffix characters v version and txt And the placeholder doesn t have to be it could be or any character you deem fit In the first command we used this technique to create a text file named version txt And in the second command two directories named v and v are created Standard input can also come from a file Let us edit the content of version txt and put some content in it Let us put Google Facebook and Netflix as new lines nano version txtSave with Ctrl x y Let us see whether our server can reach the companies outlined in the text file and maybe they are up cat version txt xargs t I ping c comping c google com PING google com bytes of data bytes from loss in fe net icmp seq ttl time ms bytes from loss in fe net icmp seq ttl time ms google com ping statistics packets transmitted received packet loss time msrtt min avg max mdev msping c facebook com PING facebook com bytes of data bytes from edge star mini shv los facebook com icmp seq ttl time ms bytes from edge star mini shv los facebook com icmp seq ttl time ms facebook com ping statistics packets transmitted received packet loss time msrtt min avg max mdev msping c netflix com PING netflix com bytes of data netflix com ping statistics packets transmitted received packet loss time msIn this command we use the file named version txt as an argument for standard input for the ping command We also introduced the t option for xargs which shows the command to execute before executing Let us do a long listing of the files and directories we have created thus far using xargs on a single line ls l xargs t echo total drwxrwxr x crmdev crmdev Mar v drwxrwxr x crmdev crmdev Mar v rw rw r crmdev crmdev Mar version txt total drwxrwxr x crmdev crmdev Mar v drwxrwxr x crmdev crmdev Mar v rw rw r crmdev crmdev Mar version txtHowever things could get messy with xargs though when what is being read from standard input are also messy What do I mean messy Well when you have standard inputs maybe filenames that result in arguments that have delimiters such as spaces and newlines things start to work strangely Take for example we create a file having a whitespace called version txt and we run xargs on it using the find command to find all files with the type txt in the current directory touch version txt lsv v version txt version txt find iname txt print xargs t ls lxargs WARNING a NUL character occurred in the input It cannot be passed through in the argument list Did you mean to use the null option Arggh xargs What does this mean right Yes xargs won t work well because it treats an embedded space as a delimiter which makes the command interpret each space separated word as a whole different argument So what do we do To avoid this we can simply use the null or option Or press yes to the prompt shown find iname txt print xargs null t ls lls l version txt version txt rw rw r crmdev crmdev Mar version txt rw rw r crmdev crmdev Mar version txtThe problem seems to be all gone We have files and directories already now created in our playground directory How about if I want to remove them all at once depending on the file type NB xargs is a powerful command and you should use it carefully especially with other powerful commands such as rm Let us use find and exec to delete the text files we created in the playground directory called tutorial and calculate the time taken to execute time find iname txt exec rm real msuser mssys ms lsv vLet us re create the files and use xargs to delete this time seq xargs I touch version txt lsv v version txt time find iname txt xargs rmreal msuser mssys msThe differences seem to be clear Asides from xargs being faster find seems to make our life harder with typing a longer command and a complex syntax How about if we want to break the execution and want our commands to execute based on the number of arguments we desire per time The immediate use case for this is the fact that the CLI has a word limit it can take so you don t want a large number of arguments that may mess up your command and shrink it and so you may want to break those long commands to smaller chunks lsv v ls xargs techo v v v v ls xargs t n echo v vecho vHere the n option is used to specify that it should run one argument per time And it ran recursively after specifying the option You can confirm your word limit on your command line by using the show limits option with xargs Let us try it with the long listing of our files again ls l xargs show limits Your environment variables take up bytesPOSIX upper limit on argument length this system POSIX smallest allowable upper limit on argument length all systems Maximum length of command we could actually use Size of command buffer we are actually using Maximum parallelism max procs must be no greater total drwxrwxr x crmdev crmdev Mar v drwxrwxr x crmdev crmdev Mar v rw rw r crmdev crmdev Mar version txtSo yeah…a world of unlimited arguments is a façade And in this example our command length is of bytes So we are doing well It is evident that xargs can make our life easier with the command line and we can spend better time doing more productive work instead Right Thank you for reading	2022-03-05 17:19:07
海外TECH	DEV Community	Elasticsearch nedir?	https://dev.to/aciklab/elasticsearch-nedir-2h11	Elasticsearch nedir TanımElasticsearch büyük bir çoğunluğu Java programlama dili ile yazılmış özgür ve açık kaynak kodlu bir arama motorudur Arama motoru denilince muhtemelen aklınıza web sayfalarınıaratan bir sistem gelse de aslında arkadaplanında büyük bir içeriği barındıran bu bilgiler üzerinde arama yapılabilen ve bu aramalara cevap verip analiz yapılabilen bir veritabanını barındırmaktadır Ayrıca bu veritabanıkendi içerisinde oldukça güzel bir şekilde dağıtık distributed ve küme cluster şeklinde çalışabilmektedir Kullanım amaçlarıYukarıda bahsettiğim şekilde tasarlanmışbir arama motoru engine çeşitli amaçlarla kullanılmaktadır Kendi github sayfalarında belirtildiği şekilde en yoğun kullanım amacıaşağıdaki gibi sıralanabilir Kütük kayıtları log Ölçülebilen veriler metric Arama altyapısı search backend Uygulama izleme monitoring Uçnokta güvenliği endpoint security Temel kavramlarElasticsearch içerisinde veri tutmasından dolayıtamamiyle bir veritabanıolarak düşünülebilir Fakat içerisindeki kavramlar ilişkisel veritabanlarına göre oldukça farklıdır Klasik bir veritabanında sisteminde veritabanlarıbulunmaktadır Elasticsearch te ise bu veritabanları yerine indice ler kullanılmaktadır İlişkisel veritabanlarındaki tablo nun elasticsearch teki karşılığıtype olarak karşımıza çıkmaktadır İlişkisel veritabanlarındaki satır kavramıyerine ise NoSQL yapılarında karşımıza çıkan document kavramıortaya çıkmaktadır Ve tabi ki tahmin edildiği gibi JSON olarak tutulmaktadır İlişkisel veritabanlarındaki sutun kavramıise elasticsearch te field olarak kullanılmaktadır Ortam Hazırlama KurulumÖrnek kurulumumuzu Ubuntu sunucu üzerinde yapacağız Bunun için öncelikle elasticsearch anahtarınıekleyip sunucumuza deposunu ekleyerek kurulumu yapabiliriz Tabi ki aşağıdaki komutların uygulanmasıiçin yetkili bir kullanıcıile girişyapılmasıgerekmektedir curl fsSL sudo apt key add echo deb stable main sudo tee a etc apt sources list d elastic x listsudo apt updatesudo apt install elasticsearch YapılandırmaSevdiğiniz bir editör ile etc elasticsearch elasticsearch yml dosyasınıaçıp aşağıda belirtildiği şekilde düzenlemeler yapmanız tavsiye edilir Aşağıdaki örnekteki satırlar diyezle başlamamalıve diğer tüm satırlar diyez ile kapalıolmalıdır Çeşitli farklıkombinasyonlar da çalışabilir fakat ilk denemenizse buna dikkat etmeniz gerekir cluster name kumeadinode name dugumpath data var lib elasticsearchpath logs var log elasticsearchnetwork host http port discovery type single nodeBuradaki yapılandırma elasticsearch üuzaktaki bir ortamdan da çalıştırabilmek ve tek node luk bir sistemi oluşturmaktadır Daha detaylıbilgi için detaylıdokümanlarıinceleyebilirsiniz Bu yapılandırma ayarlarıile birlikte portu üzerinden tüm ağüzerinden REST API ile sorgu atılabilecek şekilde ayarlarıyapılmışolacaktır Servisi başlatmaServisi başlatıp açılışta hep başlamasıiçin aşağıdaki iki komut kullanılabilir Servisin ayağa kalkmasıbiraz zaman alacaktır sudo systemctl start elasticsearchsudo systemctl enable elasticsearch KontrolServisin ayağa kalktığına emin olduktan sonra aşağıdaki komut ile elasticsearch sunucusu üzerinden sorgu atıp curl X GET http localhost Aşağıdaki gibi çıktıalabilirsiniz name dugum cluster name kumeadi cluster uuid TQuwevhrRvCCvfSAmzMxg version number build flavor default build type deb build hash eacbfddceadcca build date T Z build snapshot false lucene version minimum wire compatibility version minimum index compatibility version beta tagline You Know for Search Kümenin sağlık durumu için de aşağıdaki komut kullanılabilir curl XGET http localhost cluster health pretty cluster name kumeadi status yellow timed out false number of nodes number of data nodes active primary shards active shards relocating shards initializing shards unassigned shards delayed unassigned shards number of pending tasks number of in flight fetch task max waiting in queue millis active shards percent as number Basit UygulamaÖrnek bir uygulama yapmak için aşağıdaki komut kullanılabilir curl XPOST http localhost indis uygulama H Content Type application json d timestamp message örnek bir mesaj ustid deneme false Bu uygulama ile basit bir indice üzerinde indis uygulama isimli bir type uygulama oluşturulmuşoluyor Bu tip içerisinde ise JSON formatındaki içerikteki gibi document oluşturuluyor Ve bu document içinde timestamp massage ustid deneme gibi field ler bulunmakta Bu sorgu aşağıdaki gibi bir çıktıvermişolmasılazım index indis type uygulama id UUHWBvbmLULnqFFb version result created shards total successful failed seq no primary term Ayrıca indisinizin eklendiğini görebilmek için aşağıdaki komutu çalıştırarak çıktıdaki tablodan takip edebilmelisiniz ve indis i görebilmeniz gerekmekte curl XGET http localhost cat indices v amp pretty GelişmişUygulamalarBu adımdan sonra Elasticsearch in API dokümantasyonu ve çeşitli tutoriallarla devam edilebileceği gibi farklıseçenekler bulunmaktadır Bunlardan en popüler tanesi aşağıdaki gibidir Bu yapılara Elastic Stack adıda verilebilmektedir LogstashFluentdFilebeatLogstash çeşitli ve farklıkaynaklardan beslenerek elasticsearch üçok genişletebilmektedir Ve bu yapıya kısaca ELK adıveriliyor Fluent ise benzer şekilde elasticsearch übeslemek için genellikle Kubernetes ortamlarında kullanıldığınıgörüyoruz Ve bu yapıya da EFK adıverilmektedir Filebeat i ise hem logstash i besleyecek şekilde hem de direkt olarak elasticsearch übesleyecek şekilde yapılandırabiliyorsunuz Üstte bahsettiğimiz yapıların görselleştirilmesi için de genellikle Kibana kullanılmaktadır ve gelişmişseçenekler sunmaktadır Fakat yazımızın konusu olmadığıiçin bu kısımlara pek girmedim Pax melior est quam iustissimum bellum	2022-03-05 17:13:52
Apple	AppleInsider - Frontpage News	Apple wants major NFL streaming deal beyond 'Sunday Ticket'	https://appleinsider.com/articles/22/03/05/apple-keen-on-major-nfl-rights-deal-beyond-sunday-ticket?utm_medium=rss	Apple wants major NFL streaming deal beyond x Sunday Ticket x Apple is rumored to want a big deal with the NFL said to include online livestreaming rights the NFL Sunday Ticket package and an equity stake in NFL Media to boost the Apple TV catalog The NFL is in the process of fielding offers for a number of key assets of interest to broadcasters and streaming services In a Friday report it is thought that Apple is one of the firms in the running to acquire them but wants to do so in a single joint deal According to sources of Front Office Sports the NFL is offering three assets consisting of an equity stake in NFL Media as well as the NFL Sunday Ticket package geared towards out of market games and rights for livestreaming games through smartphones and tablets Read more	2022-03-05 17:43:34
Apple	AppleInsider - Frontpage News	Daily deals March 5: $33 Spigen Magnetic Battery Pack, 38% off Asus AC2600 Wi-Fi Router, $250 arcade cabinet & more	https://appleinsider.com/articles/22/03/05/daily-deals-march-5-33-spigen-magnetic-battery-pack-38-off-asus-ac2600-wi-fi-router-250-arcade-cabinet-more?utm_medium=rss	Daily deals March Spigen Magnetic Battery Pack off Asus AC Wi Fi Router arcade cabinet amp moreSaturday s top deals include a in arcade cabinet TB of WD Black storage for and Anker s Foldable in charging station for On Saturday there are sales on a magnetic battery pack and an arcade cabinet Each day we scour the internet for the best tech deals we can find including discounts on Apple products tech accessories and additional goodies all to help you save some cash If an item is out of stock you may still be able to order it for delivery at a later date Many of the discounts are likely to expire soon though so be sure to grab what you can Read more	2022-03-05 17:25:32
ニュース	BBC News - Home	War in Ukraine: Thousands march in Kherson against occupiers	https://www.bbc.co.uk/news/world-europe-60632587?at_medium=RSS&at_campaign=KARANGA	russia	2022-03-05 17:47:49
ニュース	BBC News - Home	Shane Warne: Hurley pays tribute to 'beloved lionheart'	https://www.bbc.co.uk/news/uk-60634012?at_medium=RSS&at_campaign=KARANGA	father	2022-03-05 17:30:04
ニュース	BBC News - Home	Havertz scores twice in dominant Chelsea win at Burnley	https://www.bbc.co.uk/sport/football/60531450?at_medium=RSS&at_campaign=KARANGA	Havertz scores twice in dominant Chelsea win at BurnleyFour goals in second half minutes help Chelsea cruise to victory in their first Premier League game since Roman Abramovich said he will sell the club	2022-03-05 17:11:34
ニュース	BBC News - Home	Saracens beat leaders Leicester to go second in Premiership	https://www.bbc.co.uk/sport/rugby-union/60617408?at_medium=RSS&at_campaign=KARANGA	leicester	2022-03-05 17:36:05
ビジネス	ダイヤモンド・オンライン - 新着記事	30代から伸びる人、伸び悩む人を分ける「ある分岐点」 - 数値化の鬼	https://diamond.jp/articles/-/297190	代から伸びる人、伸び悩む人を分ける「ある分岐点」数値化の鬼全国社が導入し、話題沸騰のマネジメント法「識学」の代表・安藤広大氏の最新刊『数値化の鬼』。	2022-03-06 02:55:00
ビジネス	ダイヤモンド・オンライン - 新着記事	メーカーに就職したい人なら正しく知っておきたい「“コスト”とは何か」 - 全図解 メーカーの仕事	https://diamond.jp/articles/-/298146	メーカーに就職したい人なら正しく知っておきたい「“コストとは何か」全図解メーカーの仕事メーカー製造業の仕事は、自動車、電機、食品……などの商品をつくって売る「ものづくり」です。	2022-03-06 02:50:00
ビジネス	ダイヤモンド・オンライン - 新着記事	【塩谷隆太×加藤容崇　対談】後編 2人のサウナー医師が一刀両断！ インチキ記事に気をつけろ！ - 医者が教えるサウナの教科書	https://diamond.jp/articles/-/296617	【塩谷隆太×加藤容崇対談】後編人のサウナー医師が一刀両断インチキ記事に気をつけろ医者が教えるサウナの教科書サウナが大ブームとなっている昨今。	2022-03-06 02:45:00
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ビジネス	ダイヤモンド・オンライン - 新着記事	【脳トレ】イラスト共通点さがしに挑戦！ - 1分間瞬読ドリル	https://diamond.jp/articles/-/298130		2022-03-06 02:35:00