投稿時間:2022-03-04 20:18:04 RSSフィード2022-03-04 20:00 分まとめ(19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	Engadget Japanese	ソニーとホンダ「期待を超える価値持つEV」目指す合弁会社設立。2025年発売へ	https://japanese.engadget.com/sony-and-honda-establish-a-joint-venture-to-develop-high-value-added-evs-102027936.html	会社設立	2022-03-04 10:20:27
python	Pythonタグが付けられた新着投稿 - Qiita	Udemy「AIパーフェクトマスター講座」のエラーコードの解決策(2022/3/4時点)	https://qiita.com/YukiTakayama/items/83a4e2d598dc89d1165d	参考にしたURL【セクションHerokuCLIのインストール】問題HerokuCLIのダウンロードページにmacOS用のインストーラーが表示されていない原因HerokuCLIのダウンロードページの仕様が変わったため解決策HomebrewをインストールbinbashccurlfsSLHerokuCLIをインストールbrewtapherokubrewampampbrewinstallherokumacのターミナルを開き、Homebrewをインストールした後、HerokuCLIのダウンロードページのコードを実行する。	2022-03-04 19:55:55
AWS	AWSタグが付けられた新着投稿 - Qiita	S3のストレージクラス	https://qiita.com/daisan182/items/575fd982f034a851a69e	データの格納コストはスタンダードクラスと比較して安価。	2022-03-04 19:39:45
技術ブログ	Mercari Engineering Blog	エンジニアがメルカリShopsでショップを開設して得ることができた視点	https://engineering.mercari.com/blog/entry/20220303-shop-opened-as-engineer/	shhellip	2022-03-04 10:00:51
技術ブログ	Developers.IO	Pivotal Tracker の API を使ってみる	https://dev.classmethod.jp/articles/pivotal-tracker-api/	developersiop	2022-03-04 10:14:09
技術ブログ	Hatena::Engineering	はてなのポッドキャスト Backyard Hatena #6 - hitode909 の日記と子育てを配信中です	https://developer.hatenastaff.com/entry/2022/03/04/190842	はてなのポッドキャストBackyardHatenahitodeの日記と子育てを配信中ですこんにちは、CTOのidmotemenです。	2022-03-04 19:08:42
海外TECH	MakeUseOf	Sonos Launches the Roam SL: What You Need to Know	https://www.makeuseof.com/sonos-roam-sl-what-you-need-to-know/	please	2022-03-04 10:35:13
海外TECH	DEV Community	Fill 100 Game (Web) is now live	https://dev.to/matteobruni/fill-100-game-web-is-now-live-3m0i	Fill Game Web is now liveSome months ago I tried reproducing a small puzzle game I used to do when I was in school How it worksThe game needs a x square but you can choose any size Every cell is filled with a number between and or it depends on your custom size Filling the square is the hardest part you need to follow one simple rule From the current filled square you can move in any directionHorizontally and Vertically by spaces example x x Diagonally by spaceYou can start from any square the goal as I said is to fill everyone of them The x is pretty difficult I found a solution prefilling half of the square then I created a script that tried to find a solution and I know it exists LinksThe website is live on the js org domain here The project is open source on GitHub here Leave a star if you liked it matteobruni fill Fill squares game made in JavaScript Fill GameFill squares game made in JavaScriptHow it worksThe game needs a x square but you can choose any size Every cell is filled with a number between and or it depends on your custom size Filling the square is the hardest part you need to follow one simple rule From the current filled square you can move in any directionHorizontally and Vertically by spaces example x x Diagonally by spaceYou can start from any square the goal as I said is to fill everyone of them The x is pretty difficult I found a solution prefilling half of the square then I created a script that tried to find a solution and I know it exists View on GitHubPS The wallpaper was made using tsParticles and if you reach a lot of confetti still tsParticles are waiting to explode matteobruni tsparticles tsParticles Easily create highly customizable particles confetti and fireworks animations and use them as animated backgrounds for your website Ready to use components available for React js Vue js x and x Angular Svelte jQuery Preact Inferno Solid Riot and Web Components tsParticles TypeScript ParticlesA lightweight TypeScript library for creating particles Dependency free browser ready and compatible withReact js Vue js x and x Angular Svelte jQuery Preact Inferno Riot js Solid js and Web Components Table of ContentsUse for your websiteLibrary installationOfficial components for some of the most used frameworksAngularInfernojQueryPreactReactJSRiotJSSolidJSSvelteVueJS xVueJS xWeb ComponentsWordPressPresetsBig CirclesBubblesConfettiFireFireflyFireworksFountainLinksSea AnemoneSnowStarsTrianglesTemplates and ResourcesDemo GeneratorCharacters as particlesMouse hover connectionsPolygon maskAnimated starsNyan cat flying on scrolling starsBackground Mask particlesMigrating from Particles jsPlugins CustomizationsDo you want to use it on your website Documentation and Development references here This library is available on the two most popular CDNs and it s easy and ready to use if you were using particles jsit s even… View on GitHub	2022-03-04 10:34:36
海外TECH	DEV Community	What is Foreign Key in DBMS?	https://dev.to/scalertopics/what-is-foreign-key-in-dbms-3gbe	What is Foreign Key in DBMS Before understanding the concept of foreign keys let s understand what a key is So as we know in a database we store our data in the form of tables in the form of rows and columns in a table What if we want to connect two or more tables with each other For that we need to understand the concept of a key So using the concept of primary key and foreign key Let s understand what the foreign key is in this article A foreign key is a column or a group of columns in a database table which must match with some other column in another table In simple words we can say a column which is common in two tables can be considered a foreign key Let s understand more clearly what foreign keys are using an example given below This is a student table in which we have roll no name class and age as attributes This type of storage of data is seen in our databases in the form of tables Let s explore another table named Student Info Table As we can see it is a table containing information about a student such as fees status contact information and address If you see both tables student and student info have a common column which is Roll No So rolling no column in the student info table will work as a foreign key and rolling no column in the student table will work as a primary key Using the concept of a foreign key and a primary key we can connect both the tables Foreign Key Query in MySQLLet s see how we can write code of foreign key in MySQL CREATE TABLE Student info Roll no int NOT NULL Fees status varchar Contact no int NOT NULL Address varchar NOT NULL PRIMARY KEY Roll no FOREIGN KEY Roll no REFERENCES Student Roll no Let s explore how we can add content to these tables INSERT INTO Student VALUE Ramesh th INSERT INTO Student VALUE Atul rd INSERT INTO Student VALUE Rahul th INSERT INTO Student VALUE Piyush th INSERT INTO Student VALUE Arnav th Remove the Foreign Key ConstraintIf we want to write a SQL command to drop a foreign key constraint then we will write the following command ALTER TABLE Student DROP FOREIGN KEY Why do we need Foreign Key Using the concept of a foreign key we can connect two or more tables as we can create a relationship between those tables with a common attribute Foreign keys also help us to maintain the referential integrity of the database How does Foreign Key maintain Referential Integrity Let s understand this concept with the help of two tables One is the student table which contains the roll number name and address of a student and the other table is the course table which contains information about a student s course So roll no in the course table referencing table will work as a foreign key and roll no in the student table will work as a primary key Here the student table is the reference table and the course table is the referencing table So the main thing we ll learn in this topic is what happens if we insert update or delete something in this table So let s explore that part also Insert If we insert any entry into our base table that is the student table then it will not create any issue We can insert as many entries as we want and it won t create any issue for insertion As a result there is no violation in insertion Delete If we delete any entry from our base table like if any student leaves an organization then we have to delete that data from our table Let s consider that roll no leaves the organization and we delete that entry from the student table But in the course table we see that roll no is currently studying network subjects So directly deleting will create an issue Integrity will be lost in this case But if we consider a case where we insert a new entry let s say roll no and then we delete that roll no then it will not create any issue So deletion may create a violation So what do you think will be the solution to this issue So we have a concept of a delete cascade where the row that we are deleting will be automatically deleted from other tables also Another method is to delete set null where the row we are deleting is found and if the same row is found in another table then we set the foreign key value null on that set Another method is to delete data with no action As the name suggests it will not do any action so data will be deleted in this case Update If we want to update any row then it will create an issue like if we have to update that data in other related tables as we saw in the deletion We can use the same method that we perform on deletion that is on update cascade on update set null on update no action Updating may result in a violation To learn more about the concepts of primary key and the distinction between primary key and foreign key on Scaler TopicsAuthor Arnav Bhardwaj	2022-03-04 10:15:22
海外TECH	DEV Community	Power of Two, A Google Interview Question - TS Solution	https://dev.to/ggorantala/power-of-two-a-google-interview-questions-ts-solution-16o5	Power of Two A Google Interview Question TS SolutionIn this lesson we will try to check if the given number is a power of We solve this by writing an efficient algorithm that takes an optimal amount of time IntroductionLet s do another challenging question to check your understanding of Bitwise operators Example Input Output True As is Example Input Output False Problem statementWrite a program to check if a given number is a power of or not Let s consider a number and find how the AND operator does this Input Output True ExplanationWe solve by making use of the amp operator in computers There are many ways to solve this of which two approaches are simple and one of them is a more complex but better solution Assume n is non negative We use the amp operator to achieve this Solution Brute force naive approachHint The exciting part of calculating the power of is that they have a set bit count equals to one AlgorithmRead the input value Repeatedly divide input with if n not equal to and if it is odd we will return false else true Here is what our algorithm will look like export const IsEven n number boolean gt function helper value number boolean if value return false while value if value return false value gt gt return true return helper n console log IsEven console log IsEven Complexity AnalysisTime complexity O logn This takes log n complexity We can do better in constant time using the Brian Kernighan s algorithm Space complexity O The space complexity is O No additional space is allocated Coding ExerciseFirst take a close look at the code snippets above and think of a solution This problem is designed for your practice so try to solve it on your own first If you get stuck you can always refer to the solution provided in the solution section Good luck export const isPow n number boolean gt Write Your Code Here return false change this return true false based on inputs If you ve got the answer great if not its normal practice similar problems and you ll get a good hold of bit manipulation tricks The solution will be explained in below Let s see how we make use of Brain Kernighan s algorithm to achieve this Solution review Brian Kernighan s algorithmThis is considered faster than the previous naive approach In this approach we count the set bits If a number is the power of we know that only one set bit is present in its Binary representation In binary we go from right to left with powers of For example and so on AlgorithmBefore we talk about algorithmic steps you should review the tabular form of steps that depicts the algorithm If n amp n return True else False Let s visualize the values in the table below Let s see a couple of examples n gt n gt n amp n gt n amp n here this becomes which is true Hence the number is a power of n gt n gt n amp n gt n amp n is which is not equal to Hence the number is not a power of Let us take a look at the optimized approach CodeHere is the reasoning behind this solution export const IsEven n number boolean gt function helper value number boolean if value return false return value amp value return helper n console log IsEven console log IsEven We can further simplify this code into a single line shown below const IsEven n number boolean gt return n amp amp n amp n console log IsEven console log IsEven Complexity analysisTime complexity O The run time depends on the number of bits in n In the worst case all bits in n are bits In the case of a bit integer the run time is O Space complexity O The space complexity is O No additional space is allocated ExtrasIf you are interested in mastering bit tricks I ve got a course that are loved by more than k programmers In this course you will learn how to solve problems using bit manipulation a powerful technique that can be used to optimize your algorithmic and problem solving skills The course has simple explanation with sketches detailed step by step drawings and various ways to solve it using bitwise operators These bit tricks could help in competitive programming and coding interviews in running algorithms mostly in O time This is one of the most important critical topics when someone starts preparing for coding interviews for FAANG Facebook Amazon Apple Netflix and Google companies To kick things off you ll start by learning about the number system and how it s represented Then you ll move on to learn about the six different bitwise operators AND OR NOT XOR and bit shifting Throughout you will get tons of hands on experience working through practice problems to help sharpen your understanding By the time you ve completed this course you will be able to solve problems faster with greater efficiency Link to my course Master Bit Manipulation for Coding Interviews	2022-03-04 10:08:24
Apple	AppleInsider - Frontpage News	Google ceases ad sales in Russia over Ukraine invasion	https://appleinsider.com/articles/22/03/04/google-ceases-ad-sales-in-russia-over-ukraine-invasion?utm_medium=rss	Google ceases ad sales in Russia over Ukraine invasionGoogle has announced that it is temporarily pausing ad sales in Russia and reports growing censorship from the country s regulator Following many other companies and services including Apple Pay and Apple s online sales Google has stopped selling any online advertising in Russia The move which includes YouTube third party publishing partners and general search is an extension to its previous ban on state funded media According to Reuters Google had previously banned any such Russian state owned media from buying or selling ads The company has also barred marketing that takes advantage of the war except for protest and anti war ads Read more	2022-03-04 10:32:08
ニュース	BBC News - Home	Metal price rise will make canned food more expensive, says LME chief	https://www.bbc.co.uk/news/business-60613855?at_medium=RSS&at_campaign=KARANGA	london	2022-03-04 10:43:34
ニュース	BBC News - Home	Birmingham: Labour holds seat in Erdington by-election	https://www.bbc.co.uk/news/uk-england-birmingham-60613453?at_medium=RSS&at_campaign=KARANGA	dromey	2022-03-04 10:16:47
ニュース	BBC News - Home	Covid: All rules in Wales could be axed on 28 March	https://www.bbc.co.uk/news/uk-wales-politics-60602012?at_medium=RSS&at_campaign=KARANGA	wales	2022-03-04 10:28:51
北海道	北海道新聞	「マンボウ」食べ笑顔に　函館の菓子店、まん延防止にかけ販売	https://www.hokkaido-np.co.jp/article/652934/	防止	2022-03-04 19:20:00
北海道	北海道新聞	函館で半世紀ぶりに地酒「五稜」復活　市内の酒店「蔵舎」店頭飾る	https://www.hokkaido-np.co.jp/article/652933/	函館市内	2022-03-04 19:20:00
北海道	北海道新聞	自・公・国の３党首が初会談　燃料高騰対策巡り協議継続	https://www.hokkaido-np.co.jp/article/652929/	国民民主党	2022-03-04 19:15:00
北海道	北海道新聞	「セガ札幌」が開所式　地元雇用の創出期待	https://www.hokkaido-np.co.jp/article/652926/	雇用	2022-03-04 19:09:00
IT	週刊アスキー	大型アップデートや新武将情報を公開予定！“『三國志 覇道』1.5周年直前生放送”を3月15日に配信決定	https://weekly.ascii.jp/elem/000/004/085/4085297/	pcsteam	2022-03-04 19:35:00