| 海外TECH |
DEV Community |
Subdominios vs. Hosts virtuales |
https://dev.to/christianpaez/subdominios-vs-hosts-virtuales-3bml
|
Subdominios vs Hosts virtualesEs importante entender la diferencia entre subdominios y VHosts porque puede afectar la forma en que se accede a su sitio web y cómo los motores de búsqueda indexan su sitio web Si no estáutilizando el tipo de alojamiento correcto también puede afectar la velocidad y el rendimiento de su sitio web e incluso ser vulnerable a las vulnerabilidades de seguridad cibernética como el secuestro de DNS las vulnerabilidades del certificado SSL y las secuencias de comandos entre sitios SubdominioUn subdominio es un dominio de segundo nivel que forma parte de un dominio más grande Por ejemplo si tiene un sitio web en example com puede crear un subdominio en subdomain example com Un subdominio se puede usar para crear un sitio web separado o se puede usar para apuntar a un sitio web o directorio diferente en el mismo servidor Host VirtualUn host virtual VH es un servicio de alojamiento de Internet que permite a las organizaciones alojar sus sitios web en un único servidor Un VH se puede usar para alojar varios sitios web cada uno con su propio nombre de dominio o se puede usar para alojar varios sitios web que comparten el mismo nombre de dominio Los VHosts pueden o no tener registros de DNS públicos por lo que para acceder a su sitio es posible que deba cambiar los nombres y las direcciones de los hosts en su servidor local generalmente ubicado en etc hosts o usar el encabezado Host de un solicitud HTTP En conclusión es importante comprender la diferencia entre subdominios y VHosts para garantizar que su sitio web sea accesible y funcione de manera óptima Revisa esta publicación en Art Of Code |
2022-07-24 18:21:22 |
| 海外TECH |
DEV Community |
Linked List Data structure |
https://dev.to/ericawanja/linked-list-data-structure-11l8
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Linked List Data structureLinked list is a linear data structure with items nodes with links pointing to other items in the list The are three types of linked lists Singly linked list the nodes have one pointer to the next item in the list The last node points to null Doubly linked lists every node has two pointers one pointing to the previous element in the list and the other pointer pointing to the next element Circular linked list The last node points to the first element in the list In this article we will be looking at singly linked list An item in singly linked list has two main parts The first part holds the data value while the other parts contains a link to the next item However the last item has nothing to point to thus its next value is null Why and when to use the Linked listsLinked lists are recommended if you have a list of objects with links to the next item in the list Its main advantage is Easy insertionInserting an element in array is quite expensive because you will have to shift all other items Similarly deleting an element in array will leave holes or else you will have to shift the positions of the elements after the removed element However when using the Linked List you can easily transverse a list and insert or remove a node at the required position Drawbacks of linked listsDoes not support random access of elements Thus you will have to transverse through the list sequentially from the first element This can be quite time consuming especially on the worst case How to create a linked listAs you might have noted from the above diagram every item in the linked list has the data part and link to the next value Below is a code template for a node data item in linked list You can check the complete code snippets used here class Node constructor val next null this data val this next next Next let us initialize a linked list Note that the head will have a null value and a size of zero because we have not added any items yet class Node constructor val next null this data val this next next class LinkedList constructor this head null this size methods Insert Node at the first position head To insert a node at the first position we will use the Node constructor We will create a new node with a data property of the value to be inserted and next property of the previous head insertFirst data this head new Node data this head this size Insert Node at the Last position Tail To insert an element at the tail we will have to transverse through the list untill we get to the last value which points to null We will assign the new node to the next value of the last node Don t forget to check if the head is empty If so the new node will be the head insertLast data let node new Node data let current if empty make the node the head if this head this head node else current this head while current next the loop terminates when the pointer gets to a node whose next property is null current current next current next node this size Insert Node at indexThe first thing to do when working with an index is to check if the index is valid That is not less than zero or greater than the size of the list If the index is equal to zero the node is to be made the head Else we will transverse the list checking if the position is less than the index using two pointers The previous pointer points to the element just before the position to insert the node while the current points to the node on the position we want to add the node When the loop terminates the next property of the previous item will point to the node to be added previous next node and the next item of the new node will point to the current item node next current insertatIndex data index if index lt index gt this size Checking if the index is valid That is less than zero or greater than the size return inserting at the first position You can reuse the insertFirst if index this head new Node data this head making the new node the head and the next value the previous head console log this head return const node new Node data creating the node using the Node class let current previous set current to first current this head let pos looping through untill you get to the index while pos lt index previous current pos current current next node next current previous next node this size Get Node at indexTo get an element at a particular index in linked list loop through the list checking if the current position is equal to the index If the position value is equal to the index output its data value Else increment the position and move the pointer to the next item getAt index let current this head let pos while current the loop terminates if the currenmt value this head is null if pos index console log current data pos current current next moving the pointer to the next value return null Remove node at indexFirst check if the index is valid That is it is not less than zero or greater than the size if you know the size If the head is eqaul to zero then you should remove the first value by moving the head pointer to the head nextNext transverse through the list to find the node with the link to the node to be deleted previous and the element after the node to be deleted current next Note the node to be removed is at the position equal to the index To remove the node the next property of the previous should point to the next element after the item to be deleted That is previous next current next removeAtIndex index if index lt index gt this size checking if the index is valid return let count let previous current current this head if index Deleting from beginning this head current next else while count lt index previous current current current next count previous next current next this size return Clear ListAn empty linked list has the head value as null Hence to clear the list you need to point the head value to null clearList this head null this size Transverse a linked listWe transverse through a linked list using the head pointer Remember that the head pointer refers to the first node On the while loop we will check that head is not equal to null That is the list is not empty or we have not exhausted looping through the list and print head data remember that a node is an object and then move the pointer to the next value printList while this head console log this head data this head this head next ConclusionThe best way to understand data structures is through practice After understanding the basics try writing the code snippets or look for leetcode problems and solve |
2022-07-24 18:16:00 |
| 海外TECH |
DEV Community |
Shell and REPL |
https://dev.to/ditaisy/shell-and-repl-34pi
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Shell and REPLA shell is a command line interpreter that interprets what user enters in the command line interface CLI And the CLI per se is a computer program for users to interact with computers with text based UI A computer with Unix like OS such as Linux usually uses Unix shell e g Bourne Again SHell bash TENEX C shell tcsh the Korn shell ksh the Z shell zsh etc A CLI implements read evaluate print and loop REPL to make the interface interactive It will loop until there is a condition that makes the process read evaluate and print terminate However those are some programming languages that have their own shell e g Python Java Clojure NodeJS etc In Java we will use java shell JShell in our CLI in order to interpret java syntax entered In general people call a CLI that uses JShell as Java REPL it goes the same for other languages Actually I am still figuring out the main purpose of a programming language REPL We usually use IDE to develop a program with necessary helpful and important features inside Presumably because it only executes a unit of code so it will be helpful to test atomically through REPL instead of running the program entirely Honestly I prefer to use replit com for that case Popped in my head if you inspect your browser and go to the console tab it uses JavaScript Yeah I think that s the best approach for a programming language REPL appearance |
2022-07-24 18:10:00 |
| 海外TECH |
DEV Community |
Subdomains vs. Virtual Hosts |
https://dev.to/christianpaez/subdomains-vs-virtual-hosts-2e71
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Subdomains vs Virtual HostsThe difference between sub domains and VHosts is important to understand because it can affect the way your website is accessed and how search engines index your website If you are not using the correct type of hosting it can also affect the speed and performance of your website and even be vulnerable to cybersecurity vulnerabilities like DNS hijacking SSL certificate vulnerabilities and cross site scripting SubdomainA sub domain is a second level domain that is part of a larger domain For example if you have a website at example com you can create a subdomain at subdomain example com A subdomain can be used to create a separate website or it can be used to point to a different website or directory on the same server Virtual HostA Virtual Host VH is an Internet hosting service that allows organizations to host their websites on a single server A VH can be used to host multiple websites each with its own domain name or it can be used to host multiple websites that share the same domain name VHosts may or may not have public DNS records so in order to access your site you may need to change host names and addresses on your localhost typically located in etc hosts or use the Host header of a standard HTTP request In conclusion it is important to understand the difference between sub domains and VHosts in order to ensure that your website is accessible and performing optimally |
2022-07-24 18:07:00 |
| 金融 |
ニュース - 保険市場TIMES |
東京海上日動、地域共通の防災対策を推進 |
https://www.hokende.com/news/blog/entry/2022/07/25/040000
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東京海上日動、地域共通の防災対策を推進自治体の連携を東京海上日動火災保険株式会社は月日、地域共通の防災対策を定めた「スマートシティの防災スタンダード」を開発・推進すると発表した。 |
2022-07-25 04:00:00 |
| ニュース |
BBC News - Home |
Eurotunnel queues: AA says holiday gridlock easing |
https://www.bbc.co.uk/news/uk-62281443?at_medium=RSS&at_campaign=KARANGA
|
eurotunnel |
2022-07-24 18:19:28 |
| ニュース |
BBC News - Home |
Surrey 'major incident' declared as grass fire ignites |
https://www.bbc.co.uk/news/uk-england-surrey-62283667?at_medium=RSS&at_campaign=KARANGA
|
anglia |
2022-07-24 18:42:22 |
| ニュース |
BBC News - Home |
Tour de France: Jonas Vingegaard crowned champion as Jasper Philipsen wins in Paris |
https://www.bbc.co.uk/sport/cycling/62285420?at_medium=RSS&at_campaign=KARANGA
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Tour de France Jonas Vingegaard crowned champion as Jasper Philipsen wins in ParisDenmark s Jonas Vingegaard secures his first Tour de France victory as Jasper Philipsen of Belgium sprints to victory on the final stage in Paris |
2022-07-24 18:50:20 |
| ビジネス |
ダイヤモンド・オンライン - 新着記事 |
ホンダ新型「ステップワゴン」車内も視界も広くて運転快適！走りも大幅進化【試乗記】 - CAR and DRIVER 注目カー・ファイル |
https://diamond.jp/articles/-/306871
|
ホンダ新型「ステップワゴン」車内も視界も広くて運転快適走りも大幅進化【試乗記】CARandDRIVER注目カー・ファイルthモデルは、暮らしを豊かにすることを目指した“新クリエイティブムーバー生活創造車。 |
2022-07-25 03:55:00 |
| ビジネス |
ダイヤモンド・オンライン - 新着記事 |
具体的な目標に欠ける新しい資本主義実行計画、改革が進まない可能性も - 数字は語る |
https://diamond.jp/articles/-/306734
|
具体的な目標に欠ける新しい資本主義実行計画、改革が進まない可能性も数字は語る新しい資本主義の実現を掲げる自民党は、年月日投開票の参議院議員選挙で大勝した。 |
2022-07-25 03:50:00 |
| ビジネス |
ダイヤモンド・オンライン - 新着記事 |
稲垣精二・生命保険協会長に聞く、「トップの決意と原理原則の浸透で、金銭詐取を撲滅する」 - ダイヤモンド保険ラボ |
https://diamond.jp/articles/-/306881
|
生命保険 |
2022-07-25 03:45:00 |
| ビジネス |
ダイヤモンド・オンライン - 新着記事 |
米スタートアップ投資が急減速、VCの力関係変化 - WSJ PickUp |
https://diamond.jp/articles/-/306882
|
wsjpickup |
2022-07-25 03:40:00 |
| ビジネス |
ダイヤモンド・オンライン - 新着記事 |
ECBのアメとムチ、使いこなせるかは別問題 - WSJ PickUp |
https://diamond.jp/articles/-/306883
|
wsjpickupecb |
2022-07-25 03:35:00 |
| ビジネス |
ダイヤモンド・オンライン - 新着記事 |
貯金ゼロ・年収300万円からの「FIRE」、7年でセミリタイア目指すお金のルール - 要約の達人 from flier |
https://diamond.jp/articles/-/306889
|
貯金ゼロ・年収万円からの「FIRE」、年でセミリタイア目指すお金のルール要約の達人fromflier近年、経済的自立と早期リタイアを指す「FIRE」という言葉が話題になっている。 |
2022-07-25 03:30:00 |
| ビジネス |
ダイヤモンド・オンライン - 新着記事 |
モデルナ効果、ボストン不動産市場が活況 - WSJ PickUp |
https://diamond.jp/articles/-/306884
|
wsjpickup |
2022-07-25 03:25:00 |
| ビジネス |
ダイヤモンド・オンライン - 新着記事 |
【日本再生のカギ】スタートアップ人材に必要な、センスメイキング理論とは？ - 起業大全 |
https://diamond.jp/articles/-/305686
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【日本再生のカギ】スタートアップ人材に必要な、センスメイキング理論とは起業大全「なぜ、日本ではユニコーン企業がなかなか出てこないのか」。 |
2022-07-25 03:20:00 |
| ビジネス |
ダイヤモンド・オンライン - 新着記事 |
【実践・販促テクニック】お客様に喜ばれながら売上も上がる【Win-Win販促】のススメ！立体駐車場の事例 - 「A4」1枚チラシで今すぐ売上をあげるすごい方法 |
https://diamond.jp/articles/-/306305
|
【実践・販促テクニック】お客様に喜ばれながら売上も上がる【WinWin販促】のススメ立体駐車場の事例「A」枚チラシで今すぐ売上をあげるすごい方法小さな会社や個人商店が今すぐ売上をあげようと思った時、どの販促ツールから作ればいいのか『「A」枚チラシで今すぐ売上をあげるすごい方法「マンダラ広告作成法」で売れるコピー・広告が時間でつくれる』ダイヤモンド社刊では、販促コンサルタントの岡本達彦氏が、今すぐ売上をあげるために必要な「A」枚チラシを誰でもつくれる「マンダラ広告作成法」という新しい販促手法を公開。 |
2022-07-25 03:15:00 |
| ビジネス |
ダイヤモンド・オンライン - 新着記事 |
【本日は給料日！なのに…】 “1万円を1億円にできない人”のワースト5大習慣 危険！【ワースト1位】 あなたの“無意識”につけこむ5大詐欺の罠 - 13歳からの億万長者入門 |
https://diamond.jp/articles/-/304573
|
【本日は給料日なのに…】“万円を億円にできない人のワースト大習慣危険【ワースト位】あなたの“無意識につけこむ大詐欺の罠歳からの億万長者入門大反響刷「億万長者マインドセットが手に入る最良の書」「高校での資産形成、投資の授業にぴったり」と絶賛されている全米ロングセラー初上陸日本人だけが知らないつの力本書の翻訳者であり「朝日新聞beフロントランナー」に取り上げられた関美和氏は、長らく外資系金融業界の最前線にいた。 |
2022-07-25 03:10:00 |
| ビジネス |
ダイヤモンド・オンライン - 新着記事 |
【食べ物の世界史】意外に知らない…「世界3大穀物」の第1位は？【書籍オンライン編集部セレクション】 - 世界史は化学でできている |
https://diamond.jp/articles/-/306346
|
化学という学問の知的探求の営みを伝えると同時に、人間の夢や欲望を形にしてきた「化学」の実学として面白さを、著者の親切な文章と、図解、イラストも用いながら、やわらかく読者に届ける、白熱のサイエンスエンターテイメント『世界史は化学でできている』。 |
2022-07-25 03:05:00 |
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