IT |
ITmedia 総合記事一覧 |
[ITmedia News] Twitter取締役会、マスク氏による買収の防衛策“ポイズンピル”発動へ |
https://www.itmedia.co.jp/news/articles/2204/16/news040.html
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itmedianewstwitter |
2022-04-16 07:27:00 |
海外TECH |
Ars Technica |
Review: Ryzen 7 5800X3D is an interesting tech demo that’s hard to recommend |
https://arstechnica.com/?p=1847911
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clock |
2022-04-15 22:08:56 |
海外TECH |
MakeUseOf |
Microsoft Is Planning to Put Ads in Your Xbox Games |
https://www.makeuseof.com/microsoft-xbox-games-ads/
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company |
2022-04-15 22:56:33 |
海外TECH |
DEV Community |
Cheerio Vs Puppeteer for Web Scraping: Picking the Best Tool for Your Project |
https://dev.to/zoltan/cheerio-vs-puppeteer-for-web-scraping-picking-the-best-tool-for-your-project-4dkl
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Cheerio Vs Puppeteer for Web Scraping Picking the Best Tool for Your ProjectThis post was originally featured on ScraperAPI Cheerio vs Puppeteer Differences and When to Use ThemCheerio and Puppeteer are both libraries made for Node js a backend runtime environment for Javascript that can be used for scraping the web However they have major differences that you need to consider before picking a tool for your project Before moving into the details for each library here s an overview comparison between Cheerio and Puppeteer Cheerio Vs PuppeteerCheerio was built with web scraping in mind Puppeteer was designed for browser automation and testingCheerio is a DOM parser able to parser HTML and XML files Puppeteer can execute Javascript making it able to scrape dynamic pages like single page applications SPAs Cheerio can t interact with the site or access content behind scripts Puppeteer can interact with websites accessing content behind login forms and scripts Cheerio has an easy learning curve thanks to its simple syntax Puppeteer has a steep learning curve as it has more functionalities and requires Async for better results Cheerio is lightning fast in comparison to Puppeteer Compared to Cheerio Puppeteer is quite slow Cheerio makes extracting data super simple using JQuery like syntax and CSS XPath selectors to navigate the DOM Puppeteer can take screenshots submit forms and make PDFs Now that you have a big picture vision let s dive deeper into what each library has to offer and how you can use them to extract alternative data from the web What is Cheerio Cheerio is a Node js framework that parses raw HTML and XML data and provides a consistent DOM model to help us traverse and manipulate the result data structure To select elements we can use CSS and XPath selectors making navigating the DOM easier However Cheerio is well known for its speed Because Cheerio doesn t render the website like a browser it doesn t apply CSS or load external resources Cheerio is lightweight and fast Although in small projects we won t notice in large scraping tasks it will become a big time saver What is Puppeteer On the other hand Puppeteer is actually a browser automation tool designed to mimic users behavior to test websites and web applications It “provides a high level API to control headless Chrome or Chromium over the DevTools Protocol In web scraping Puppeteer gives our script all the power of a browser engine allowing us to scrape pages that require Javascript execution like SPAs scrape infinite scrolling dynamic content and more Should You Use Cheerio or Puppeteer for Web Scraping Although you might already have an idea of the best scenarios let us take all doubts out of the way If you want to scrape static pages that don t require any interactions like clicks JS rendering or submitting forms Cheerio is the best option but If the website uses any form of Javascript to inject new content you ll need to use Puppeteer The reasoning behind our recommendation is that Puppeteer is just overkill for static websites Cheerio will help you scrape more pages faster and in fewer lines of code That said there are multiple cases where using both libraries is actually the best solution After all Cheerio can make it easier to parse and select elements while Puppeteer would give you access to content behind scripts and help you automate events like scrolling down for infinite paginations Building a Scraper with Cheerio and Puppeteer Code Example To make this example easy to follow we ll build a scraper using Puppeteer and Cheerio that ll navigate to and bring back all quotes and authors from page Installing Node js Cheerio and PuppeteerWe ll download Node js from the official site and follow the instructions from the installer Then we ll create a new project folder we named it cheerio puppeteer project and open it inside VScode you can use any other editor you d prefer Inside your project folder open a new terminal and type npm init y to kickstart your project Open the Target Website Using PuppeteerNow we re ready to install our dependencies using npm install cheerio puppeteer After a few seconds we should be ready to go Create a new file named index js and import our dependencies at the top const puppeteer require puppeteer const cheerio require cheerio Next we ll create an empty list named scraped quotes to store all our results followed by our async function so we can have access to the await operator Just so we don t forget we ll write a browser close method at the of our function scraped quotes async gt await browser close Using Puppeteer let s launch a new browser instance open a new page and navigate to our target website const browser await puppeteer launch const page await browser newPage await page goto Parsing the HTML with CheerioTo get access to the HTML of the website we can use evaluate and return the raw HTML data this is an important step because Cheerio can only work with HTML or XML data so we need to access it before being able to parse it const pageData await page evaluate gt return html document documentElement innerHTML For testing purposes we can use console log pageData to log the response to our terminal Because we already know it works we ll send the raw HTML to Cheerio for parsing const cheerio load pageData html Now we can use to refer to the parsed version of the HTML file for the rest of our project Selecting Elements with CheerioBefore we can actually write our code we first need to find out how the page is structured Let s go to the page itself on our browser and inspect the cards containing the quotes We can see that the elements we re interested in are inside a div with the class quote So we can select them and iterate through all of the divs to extract the quote text and the author After inspecting these elements here are our targets Divs containing our target elements div quote Quote text element find span text Quote author element find author Let s translate this into code let quote cards div quote quote cards each index element gt quote element find span text text author element find author text Using the text method we can access to the text inside the element instead of returning the string of HTML Pushing the Scraped Data Into a Formatted ListIf we console log our data at this point it will be a messy chunk of text Instead we ll use the empty list we created outside our function and push the data over there To do so add these two new lines to your script right after your author variable scraped quotes push Quote quote By author Finished Code ExampleNow that everything is in place we can console log scraped quotes before closing the browser dependenciesconst puppeteer require puppeteer const cheerio require cheerio empty list to store our datascraped quotes main function for our scraper async gt launching and opening our pageconst browser await puppeteer launch const page await browser newPage navigating to a URLawait page goto getting access to the raw HTMLconst pageData await page evaluate gt return html document documentElement innerHTML parsing the HTML and picking our elementsconst cheerio load pageData html let quote cards div quote quote cards each index element gt quote element find span text text author element find author text pushing our data into a formatted list scraped quotes push Quote quote By author console logging the resultsconsole log scraped quotes closing the browserawait browser close Resulting in a formatted list of data I hope you enjoyed this quick overview of arguably the two best web scraping tools available for Javascript Node js Although in most cases you ll want to use Cheerio over Puppeteer for those extra complex projects Puppeteer brings the extra tools you ll need to get the job done |
2022-04-15 22:15:40 |
金融 |
金融総合:経済レポート一覧 |
EUソルベンシーIIの動向~EIOPAが2023年適用のUFR(終局フォワードレート)水準を公表:保険・年金フォーカス |
http://www3.keizaireport.com/report.php/RID/492618/?rss
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eiopa |
2022-04-16 00:00:00 |
金融 |
金融総合:経済レポート一覧 |
FX Daily(4月14日)~ドル円、126円絡みまで反発 |
http://www3.keizaireport.com/report.php/RID/492620/?rss
|
fxdaily |
2022-04-16 00:00:00 |
金融 |
金融総合:経済レポート一覧 |
「Move To Earn暗号資産」の衝撃~散歩で稼ぐ暗号資産の可能性:Watching |
http://www3.keizaireport.com/report.php/RID/492621/?rss
|
movetoearn |
2022-04-16 00:00:00 |
金融 |
金融総合:経済レポート一覧 |
ECBの利上げ開始~いつからの結論はまだ先、6月にお会いしましょう:Europe Trends |
http://www3.keizaireport.com/report.php/RID/492625/?rss
|
europetrends |
2022-04-16 00:00:00 |
金融 |
金融総合:経済レポート一覧 |
FRB、日銀よりも難しい金融政策判断に直面するECB:木内登英のGlobal Economy & Policy Insight |
http://www3.keizaireport.com/report.php/RID/492628/?rss
|
lobaleconomypolicyinsight |
2022-04-16 00:00:00 |
金融 |
金融総合:経済レポート一覧 |
ECBのラガルド総裁の記者会見~Journey has begun:井上哲也のReview on Central Banking |
http://www3.keizaireport.com/report.php/RID/492629/?rss
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journeyhasbegun |
2022-04-16 00:00:00 |
金融 |
金融総合:経済レポート一覧 |
マイナス金利倶楽部に取り残される日本:Market Flash |
http://www3.keizaireport.com/report.php/RID/492653/?rss
|
marketflash |
2022-04-16 00:00:00 |
金融 |
金融総合:経済レポート一覧 |
ウクライナ問題を機に新興国で広がる引き締めドミノも、トルコ中銀は「完全無視」~景気下支えと金融の安定を重視する構えも、ウクライナ情勢に揺さぶられる展開は避けられない:Asia Trends |
http://www3.keizaireport.com/report.php/RID/492654/?rss
|
asiatrends |
2022-04-16 00:00:00 |
金融 |
金融総合:経済レポート一覧 |
投資テーマから考えるポートフォリオ戦略:「預金していれば大丈夫」と思っていませんか? あなたの大切な資産を守るための「預金プラスアルファ」 |
http://www3.keizaireport.com/report.php/RID/492665/?rss
|
三井住友 |
2022-04-16 00:00:00 |
金融 |
金融総合:経済レポート一覧 |
楽読 Vol.1809~物価上昇の実感が強まる中、資産運用の必要性について考える |
http://www3.keizaireport.com/report.php/RID/492666/?rss
|
日興アセットマネジメント |
2022-04-16 00:00:00 |
金融 |
金融総合:経済レポート一覧 |
4月ECB理事会で金融政策の現状維持を決定~年内利上げ開始の可能性高まる |
http://www3.keizaireport.com/report.php/RID/492668/?rss
|
現状維持 |
2022-04-16 00:00:00 |
金融 |
金融総合:経済レポート一覧 |
【石黒英之のMarket Navi】米国株の先行きを左右する米企業決算~ハイテク大手の決算内容が焦点... |
http://www3.keizaireport.com/report.php/RID/492669/?rss
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marketnavi |
2022-04-16 00:00:00 |
金融 |
金融総合:経済レポート一覧 |
米国ハイ・イールド債券マンスリー~2022年3月の米国ハイ・イールド債券は続落 |
http://www3.keizaireport.com/report.php/RID/492670/?rss
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野村アセットマネジメント |
2022-04-16 00:00:00 |
金融 |
金融総合:経済レポート一覧 |
ECB理事会(4月14日)の注目点~ECBは現行政策維持を決定、政策選択余地を残す:マーケット・レポート |
http://www3.keizaireport.com/report.php/RID/492673/?rss
|
選択 |
2022-04-16 00:00:00 |
金融 |
金融総合:経済レポート一覧 |
スタートアップの成長に向けたファイナンスに関するガイダンス |
http://www3.keizaireport.com/report.php/RID/492679/?rss
|
経済産業省 |
2022-04-16 00:00:00 |
金融 |
金融総合:経済レポート一覧 |
新しい「お金」の授業 |
http://www3.keizaireport.com/report.php/RID/492680/?rss
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金融庁 |
2022-04-16 00:00:00 |
金融 |
金融総合:経済レポート一覧 |
嫌われる円安~メリット・デメリットの非対称性:Economic Trends |
http://www3.keizaireport.com/report.php/RID/492686/?rss
|
economictrends |
2022-04-16 00:00:00 |
金融 |
金融総合:経済レポート一覧 |
内外経済とマーケットの注目点(2022/4/15)~米実質金利の上昇や日本での新型コロナの新規感染者増加などに注意:金融・証券市場・資金調達 |
http://www3.keizaireport.com/report.php/RID/492689/?rss
|
大和総研 |
2022-04-16 00:00:00 |
金融 |
金融総合:経済レポート一覧 |
BuySell Technologies(東証グロース)~着物・切手・ブランド品・貴金属等の中古品の出張買取サービス「バイセル」を展開。出張訪問件数の増加や子会社の収益拡大により、成長継続を予想:アナリストレポート |
http://www3.keizaireport.com/report.php/RID/492690/?rss
|
buyselltechnologies |
2022-04-16 00:00:00 |
金融 |
金融総合:経済レポート一覧 |
みらいワークス(東証グロース)~独立した働き方をするプロフェッショナル向けに特化した人材サービスを展開。24年9月期の売上高100億円達成に向け、22年9月期は投資先行の期となる:アナリストレポート |
http://www3.keizaireport.com/report.php/RID/492691/?rss
|
達成 |
2022-04-16 00:00:00 |
金融 |
金融総合:経済レポート一覧 |
【注目検索キーワード】中小M&A |
http://search.keizaireport.com/search.php/-/keyword=中小M&A/?rss
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検索キーワード |
2022-04-16 00:00:00 |
金融 |
金融総合:経済レポート一覧 |
【お薦め書籍】5秒でチェック、すぐに使える! 2行でわかるサクサク仕事ノート |
https://www.amazon.co.jp/exec/obidos/ASIN/4046053631/keizaireport-22/
|
結集 |
2022-04-16 00:00:00 |
金融 |
ニュース - 保険市場TIMES |
ペット保険「PS保険」が「日経トレンディ 保険大賞2022」大賞を受賞 |
https://www.hokende.com/news/blog/entry/2022/04/16/080000
|
|
2022-04-16 08:00:00 |
ビジネス |
ダイヤモンド・オンライン - 新着記事 |
マスク氏、ツイッターの問題は「検閲」と主張 - WSJ発 |
https://diamond.jp/articles/-/301757
|
検閲 |
2022-04-16 07:09:00 |
北海道 |
北海道新聞 |
16日の予告先発 日本ハムは伊藤 |
https://www.hokkaido-np.co.jp/article/670064/
|
予告先発 |
2022-04-16 07:35:31 |
北海道 |
北海道新聞 |
台風1号が温帯低気圧に |
https://www.hokkaido-np.co.jp/article/670231/
|
温帯低気圧 |
2022-04-16 07:36:09 |
北海道 |
北海道新聞 |
米大統領、年収7千万円 納税申告書公開 |
https://www.hokkaido-np.co.jp/article/670252/
|
米大統領 |
2022-04-16 07:23:00 |
北海道 |
北海道新聞 |
ロシア旗艦、ミサイルで撃沈 2発命中と米国防総省 |
https://www.hokkaido-np.co.jp/article/670250/
|
国防総省 |
2022-04-16 07:13:00 |
北海道 |
北海道新聞 |
集合住宅火災で2人死亡 大阪・西成、高齢男女 |
https://www.hokkaido-np.co.jp/article/670249/
|
集合住宅 |
2022-04-16 07:03:00 |
ビジネス |
東洋経済オンライン |
原油は米備蓄放出で今後最高値更新の恐れがある 所詮は中間選挙乗り切りのための一時しのぎ | 市場観測 | 東洋経済オンライン |
https://toyokeizai.net/articles/-/581293?utm_source=rss&utm_medium=http&utm_campaign=link_back
|
物価上昇 |
2022-04-16 07:30:00 |
ニュース |
THE BRIDGE |
心疾患を音で見つける「超聴診器」開発、熊本発AMIが日清紡HDと資本業務提携 |
https://thebridge.jp/2022/04/ami-nissinbo-mugenlabo-magazine
|
心疾患を音で見つける「超聴診器」開発、熊本発AMIが日清紡HDと資本業務提携本稿はKDDIが運営するサイト「MUGENLABOMagazine」に掲載された記事からの転載鹿児島や熊本を拠点とするヘルスケアスタートアップAMIは、日清紡ホールディングスと資本業務提携を締結し、億円を資金調達したと発表した。 |
2022-04-15 22:15:23 |
ニュース |
THE BRIDGE |
【Web3起業家シリーズインタビュー】Gaudiy 代表・石川裕也氏に聞いた Web3 の現在地と、日本での社会実装のゆくえ(後編) |
https://thebridge.jp/2022/04/gaudiy-ishikawa-2-mugenlabo-magazine
|
【Web起業家シリーズインタビュー】Gaudiy代表・石川裕也氏に聞いたWebの現在地と、日本での社会実装のゆくえ後編本稿はKDDIが運営するサイト「MUGENLABOMagazine」に掲載された記事からの転載MUGENLABOMAGAZINEでは、ブロックチェーン技術をもとにしたNFTや仮想通貨をはじめとする、いわゆるWebビジネスの起業家にシリーズで話を伺います。 |
2022-04-15 22:00:50 |
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