Node.js でお手軽スクレイピング 2020 年夏 - Qiita
皆さんは Web ページのスクレイピングって書いた事ありますか？私はあります。だってどんなに平和で平穏な生活を送っていても数年に一度はスクレイピングってしたくなりますよね。「うわーまじか！API ないのかよ…。」的な。 そうしたら HTTP クライアントと HTML パーサのライブラリを探してきてインストールした上でごりごり書くことになると思います。でも実際に書いてみると、そうやってライブラリのインストールをしたりサンプルコードで動作確認している時間よりも、HTML を解析して実際にパースしたところから対象の要素を取得して欲しい値を取り出す試行錯誤の時間の方が長かったっていう事はないですか？ 今日ご紹介する Node.js でお手軽スクレイピングは、その辺の試行錯誤の手間を極力減らすことが出来る方法です。2020 年夏の最新版です。 まずは環境から。特に古いものを使う理由もないので 202
Deno 1.0
Dynamic languages are useful tools. Scripting allows users to rapidly and succinctly tie together complex systems and express ideas without worrying about details like memory management or build systems. In recent years programming languages like Rust and Go have made it much easier to produce sophisticated native machine code; these projects are incredibly important developments in computer infra
Node.js for Beginners | Envato Tuts+
Event-driven programming can be overwhelming for beginners, which can make Node.js difficult to get started with. But don't let that discourage you. In this article, I will teach you some of the basics of Node.js and explain why it has become so popular. Introduction To start using Node.js, you must first understand the differences between Node.js and traditional server-side scripting environments
Upgrade Node.js via NPM
This method of upgrading node is now unstable and should not be used. The best way to manage Node.js versions is to use NVM: Node Version Management.! I was recently installing a utility via NPM when I learned that my version of Node.js itself was out of date. No worries -- simply upgrade my Node.js install and move forward. Of course I could just hit nodejs.org and get the new image, but figure
Binary decision diagram - Wikipedia
"Branching program" redirects here. For other uses, see NC (complexity) § Barrington's theorem. In computer science, a binary decision diagram (BDD) or branching program is a data structure that is used to represent a Boolean function. On a more abstract level, BDDs can be considered as a compressed representation of sets or relations. Unlike other compressed representations, operations are perfor
io.js - JavaScript I/O
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