投稿時間:2023-08-20 17:08:53 RSSフィード2023-08-20 17:00 分まとめ(9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
TECH	Techable（テッカブル）	Photosynth、商談獲得自動化サービス導入。温度感が高い顧客をすぐにフォロー、受注リードタイムが最短3日に	https://techable.jp/archives/217484	photosynth	2023-08-20 07:00:52
python	Pythonタグが付けられた新着投稿 - Qiita	クラスベースビューについて（自分用メモ）	https://qiita.com/Ryo_Kitamoto/items/d29abbcdd12cedc7d15c	django	2023-08-20 16:59:23
python	Pythonタグが付けられた新着投稿 - Qiita	Pythonで文字列から絵文字を処理する demoji	https://qiita.com/waterleaper/items/e54d13d391566366c1ff	findallstr	2023-08-20 16:34:54
Ruby	Rubyタグが付けられた新着投稿 - Qiita	Rubyでコマンドラインのオプションを扱う"optparse"の使い方	https://qiita.com/ichiiiAL/items/f1f4588d0598ea681630	optparse	2023-08-20 16:48:43
技術ブログ	Developers.IO	Dependabot grouped version updates で semantic version level が利用可能になりました	https://dev.classmethod.jp/articles/semantic-version-level-now-available-in-dependabot-grouped-version-updates/	abotgroupedversionupdates	2023-08-20 07:26:16
海外TECH	DEV Community	From Bits to Bytes: Understanding Network Protocols and Seamless Communication	https://dev.to/ainasanghi/from-bits-to-bytes-understanding-network-protocols-and-seamless-communication-3n2n	From Bits to Bytes Understanding Network Protocols and Seamless Communication Introduction to Network Protocols Understanding the role and importance of protocols in networkingImagine you have two friends who want to talk to each other over the phone But here s the twist one speaks English and the other speaks German To make their conversation work they need some rules to understand each other In the world of computers and networks we have something similar called network protocols Think of network protocols as a set of rules and instructions that computers use to communicate with each other Just like our friends need a common language to chat computers need protocols to understand how to send and receive information These protocols help computers in different parts of the world made by different companies to talk and share data They ensure that information gets from one computer to another in a smooth and organized way Now why are these protocols so important Well imagine if there were no rules for how computers should talk to each other It would be like a big communication mess Nothing would make sense and computers would have a hard time understanding each other Protocols make sure data gets sent and received correctly sort of like traffic rules that keep cars moving safely on the road There are many types of protocols each with a specific job Some protocols handle the basics like how to start and end communication Others make sure data arrives in the right order and isn t garbled along the way There are even protocols for sending emails browsing websites and streaming videos In a nutshell network protocols are like the friendly rules computers follow to communicate effectively They keep things organized and help data travel smoothly between different devices on a network Just like our friends need a language to talk computers need protocols to chat with each other over the vast world of the internet TCP IP Protocol Suite Detailed exploration of the TCP IP model its layers and their functionsImagine you re building a sandwich you ve got different layers like bread veggies and cheese Well the TCP IP Protocol Suite is a bit like that but for computers and the internet Okay so let s talk about this TCP IP thing It s a fancy name for a set of rules that computers use to chat with each other over the internet It s like a recipe that helps them understand what to do Think of the TCP IP model as a sandwich with four layers Each layer has its own special job just like the layers in a sandwich have different tastes and textures Layer The Bread Network Interface Layer At the bottom we have the bread this is where the data actually gets onto the internet highway It s like the on ramp for your data This layer deals with stuff like how data is turned into signals that can travel on cables or through the air Layer The Veggies Internet Layer The veggies in our sandwich are like the Internet layer This layer takes care of making sure your data knows where to go It adds addresses and labels to your data so that it doesn t get lost on its way Layer The Cheese Transport Layer Now the cheese that s our transport layer This layer is all about slicing your data into pieces like sending a big file in smaller parts It also checks to make sure all the pieces arrived safely and puts them back together on the other side Layer The Sauce Application Layer Last but not least we ve got the sauce This is where all the fancy stuff happens It s like the apps you use on your phone or computer This layer decides what kind of data needs to be sent and received like web pages emails or videos So the TCP IP Protocol Suite is like a delicious sandwich made up of these four layers each doing its own important job to help computers talk nicely on the internet Just like a good sandwich needs all its layers to taste amazing the TCP IP model needs all its layers to keep our digital world connected and running smoothly IP Addressing and Subnetting Explanation of IPv IPv subnetting and addressing schemesThink of IP addresses as home addresses for computers When you want to send a letter or a package you need the recipient s address right Well computers need addresses too so they can find each other on the Internet Now there are two kinds of IP addresses IPv and IPv Imagine IPv as an older style of address kind of like a street address with numbers like Main Street But because the internet has grown so big we needed more addresses That s where IPv comes in It s like a super sized version of an address using a mix of numbers and letters like db a ae Now let s talk about subnetting Imagine you re in a big apartment building and the whole building has one address But inside each apartment also has its own number to tell them apart Subnetting is a bit like that it s a way to divide big networks into smaller groups called subnets This helps manage and organize addresses better Here s a simple way to understand it Imagine you re throwing a big party and you ve got a lot of guests You divide them into smaller groups maybe some are friends some are family and some are coworkers That way you can give each group specific instructions or tasks Subnetting does something similar for IP addresses So just to sum up IP addressing is like giving homes to computers on the internet and there are two types IPv and IPv Subnetting is like organizing big groups of addresses into smaller more manageable chunks kind of like sorting guests at a party It s all about helping computers communicate effectively and keep the internet buzzing smoothly Domain Name System DNS How DNS works to translate domain names into IP addressesThink of DNS like a digital phone book for the internet When you want to call your friend you look up their name in the phone book to find their number right Well computers do something similar using DNS Imagine you re surfing the web and you type in a website s name like www example com Your computer wants to visit that site but it needs the site s actual address the IP address This is where DNS comes in DNS is like a magical translator It takes the name you entered like www example com and figures out the matching IP address It s like looking up Pizza Place in the phone book and finding the actual phone number Here s how it works Your computer sends a little message to a DNS server asking Hey what s the IP address for www example com The DNS server quickly checks its own digital phone book finds the IP address and sends it back to your computer Now your computer knows where to find the website you want Picture this You re at a huge party and you need to find your friend in the crowd Instead of searching everywhere you ask someone who knows where your friend is DNS is like that helpful person who points you in the right direction In a nutshell DNS is like an internet helper that translates easy to remember website names into the actual numbers computers use to find each other It s like having a smart friend who knows all the right phone numbers in the digital world DHCP Dynamic Host Configuration Protocol How DHCP assigns IP addresses dynamicallyImagine you re at a super cool party and you need a spot to sit But instead of picking a chair a friendly host offers you one that s free That s kind of what DHCP does for devices on a network Alright so let s break it down DHCP is like the party host for your devices like phones and laptops when they join a network These devices need an IP address to play nicely on the network just like you need a chair to enjoy the party Here s how it works When your device shows up at the network party it sends a little message saying Hey can I have an IP address The DHCP host hears this and says Sure thing Here s an available IP address just for you It s like the host finding you a spot to sit But here s the cool part the IP address isn t just any random number It s like getting a special seat at the party with your name on it This makes sure that all the devices get their own space to communicate on the network Imagine you re at a big picnic and the organizer hands out plates and cutlery to everyone DHCP is a bit like that it hands out IP addresses so devices can join the network picnic In a nutshell DHCP is like a friendly party host that gives devices their own special IP addresses when they come to the network party Just like a good host finds you a spot to enjoy the fun DHCP finds devices a place on the digital playground of the network	2023-08-20 07:33:04
海外TECH	DEV Community	Exceptions	https://dev.to/lizmat/exceptions-3g0i	ExceptionsThis blog post looks at the differences in creating and handling exceptions between Perl and the Raku Programming Language Exception handling phasersIn Perl you can use eval to catch exceptions in a piece of code Perleval die Goodbye cruel world say       Goodbye cruel world at …say Alive again In Raku this functionality is covered by try Rakutry die Goodbye cruel world say Goodbye cruel world␤ in block …say Alive again In Perl you can also use the return value of eval in an expression Perlmy foo eval   undef if exception was thrownThis works the same way in Raku for try Rakumy foo try something Nil if something is and it doesn t even have to be a block Rakumy foo try something Nil if something is In Perl if you need finer control over what to do when an exception occurs you can use special signal handlers SIG DIE and SIG WARN In Raku these are replaced by two exception handling phasers which due to their scoping behaviour must always be specified with curly braces These exception handling phasers in the following table are applicable only to the surrounding block and you can have only one of each type in a block Name Description CATCH Run when an exception is thrown CONTROL Run for any other control exception Catching exceptionsThe SIG DIE pseudo signal handler in Perl is no longer recommended There are several competing CPAN modules that provide try catch mechanisms such as Try Tiny and Syntax Keyword Try Even though these modules differ completely in implementation they provide very similar syntax with only very minor semantic differences so they re a good way to compare Raku and Perl features In Perl you can catch an exception only in conjunction with a try block Perluse Try Tiny         or Syntax Keyword Trytry die foo catch warn caught error when using Syntax Keyword Try Raku does not require a try block The code inside a CATCH phaser will be called whenever an exception is thrown in the immediately surrounding lexical scope Raku surrounding scope added for clarity CATCH say aw died resume AKA topic contains the exception die goodbye cruel world say alive again aw died alive againAgain you do not need a try statement to catch exceptions in Raku You can use a try block on its own if you want but it s just a convenient way to disregard any exceptions thrown inside that block Also note that will be set to the Exception object inside the CATCH block In this example execution will continue with the statement after the one that caused the exception to be thrown This is achieved by calling the resume method on the Exception object If the exception is not resumed it will be thrown again and possibly caught by an outer CATCH block if there is one And if there are no outer CATCH blocks the exception will result in program termination The when statement makes it easy to check for a specific exception Raku CATCH when X NYI Not Yet Implemented exception thrown   say aw too early in history resume default say WAT rethrow   throw the exception in again X NYI new feature gt “Frobnicator throw resumed now rethrown say back to the future never gets here aw too early in history WAT Attempt to divide by zero using In this example only exceptions of the X NYI type will resume all the others will be thrown to any outer CATCH block and will probably result in program termination And we ll never go back to the future Catching warningsIf you do not want any warnings to emanate when a piece of code executes you can use the no warnings pragma in Perl Perluse warnings    need to enable warnings explicitly no warnings my foo say foo    no visible warning my bar print bar Use of uninitialized value bar in print In Raku you can use a quietly block Raku warnings are enabled by defaultquietly my foo say foo   no visible warning my bar print bar Use of uninitialized value of type Any in string contextThe quietly block will catch any warnings that emanate from that block and disregard them If you want finer control in Perl on which warnings you want to see you can select the warning categories you want enabled or disabled with use warnings or no warnings respectively For example Perluse warnings no warnings uninitialized my bar print bar    no visible warning If you want to have finer control in Raku you will need a CONTROL phaser CONTROL PhaserThe CONTROL phaser is very much like the CATCH phaser but it handles a special type of exception called the control exception A control exception is thrown whenever a warning is generated in Raku which you can catch with the CONTROL phaser This example will not show warnings for using uninitialised values in expressions Raku CONTROL when CX Warn   Control eXception type for Warnings   note message unless message starts with Use of uninitialized my bar print bar       no visible warning There are currently no warning categories defined in Raku but they are being discussed for future development In the meantime you will have to check for the actual message of the control exception CX Warn type as shown above The control exception mechanism is used for quite a lot of other functionality in addition to warnings The following statements in alphabetical order also create control exceptions emitfaillastnextproceedredoreturnreturn rwsucceedtakeControl exceptions generated by these statements will also show up in any CONTROL phaser Luckily if you don t do anything with the given control exception it will be re thrown when the local CONTROL phaser is finished and ensure its intended action is performed SummaryCatching exceptions and warnings are handled by phasers in Raku not by eval or signal handlers as in Perl Exceptions are first class objects in Raku	2023-08-20 07:30:00
ニュース	BBC News - Home	Hurricane Hilary weakens but could still be deadly - US	https://www.bbc.co.uk/news/world-us-canada-66499946?at_medium=RSS&at_campaign=KARANGA	california	2023-08-20 07:22:33
ニュース	BBC News - Home	England in Women's World Cup final - Millie Bobby Brown's Lionesses message	https://www.bbc.co.uk/sport/av/football/66562444?at_medium=RSS&at_campaign=KARANGA	England in Women x s World Cup final Millie Bobby Brown x s Lionesses messageStranger Things actress Millie Bobby Brown fronts a special film to celebrate the Lionesses reaching the Women s World Cup final	2023-08-20 07:01:29