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New and potential ES2019 JavaScript features every developer should be excited about - LogRocket Blog
New and potential ES2019 JavaScript features every developer should be excited about JavaScript has come a long way since its early days, with many new additions and features designed specifically to make the language more user-friendly and less verbose. Below are some recent additions to JavaScript that I find fascinating. Some of these features are already available in Node, Chrome, Firefox, and
Using React Hooks for state management - LogRocket Blog
Editor’s note: This React Hooks state management tutorial was last updated on 25 May 2021. The React Hooks API has introduced a whole new way of writing and thinking about React apps. One of my favorite React Hooks is useReducer, which you can use to share states between components. In this tutorial, we’ll show you how to handle complex state updates in React using the useReducer Hook. We’ll cover
Do React Hooks Replace Redux?
Since the React hooks API was introduced, a lot of questions have risen about whether or not React hooks will replace Redux. In my view, there is little overlap between hooks and Redux. Hooks didn’t give us magical new state capabilities. Instead, it enhanced the API for things we could already do with React. However, the hooks API has made the native React state API a lot more usable, and because
Lombok makes Java cool again
Here at Grubhub, we use Java for most of our backend programming. Java is a battle-tested language that has proven its speed and reliability over the last 20 years. While we have been using Java for many years, recently, it has started to show its age. Although Java is one of the most popular JVM languages, it’s not the only one. In the last few years, it’s faced several challengers, such as Scala
A Performance Cheat Sheet for MongoDB | Severalnines
Database performance affects organizational performance, and we tend to want to look for a quick fix. There are many different avenues to improve performance in MongoDB. In this blog, we will help you to understand better your database workload, and things that may cause harm to it. Knowledge of how to use limited resources is essential for anybody managing a production database. We will show you
Dockerコンテナが遅くなるもう一つの原因 | POSTD
前回の ブログ記事 では、Kubernetesの話と、 ThoughtSpot がKubernetesを開発インフラのニーズに合わせてどのように取り入れたかをご紹介しました。今回はその続報として、最近の興味深いデバッグ経験について少々駆け足になりますがお話ししていきます。本記事も「コンテナ化と仮想化はノットイコールである」という事実に基づいており、たとえcgroupの上限がどれも高くない値に設定されホストマシンで十分な演算能力が利用できるとしても、コンテナ化されたプロセス同士がリソースの競合を起こす場合があることを示したいと思います。 ThoughtSpotでは内部のKubernetesクラスタで 多数のCI/CDや開発関連のワークフロー を稼働させており、ある1点を除いては全てが順調でした。唯一問題だったのは、ドッカー化された製品コピーを起動すると、パフォーマンスが期待を極端に下回るレベ
Keep webpack Fast: A Field Guide for Better Build Performance - Slack Engineering
The build tools of yore: a Loom with Jacquard machine attached webpack is a brilliant tool for bundling frontend assets. When things start to slow down, though, its batteries-included nature and the ocean of third-party tooling can make it difficult to optimize. Poor performance is the norm and not the exception. But it doesn’t have to be that way, and so — after many hours of research, trial, and
Kubernetes Best Practices
Best Practices for kubernetes are as follow, Containers:- Containers should be ephemeral. Use a .dockerignore file. Use multi-stage builds. Avoid installing unnecessary packages. Each container should have only one concern. Minimize the number of layers. Sort multi-line arguments. Build cache. Don’t trust arbitrary base images. Use small base image. Use the builder pattern. Inside Container:- Use
フロントエンドエンジニアなら知っておきたい、JavaScriptのログ収集方法まとめ
サーバーサイドに比べて見落とされがちな、フロントエンドのエラーログ収集。JavaScriptのログ収集、確認に役立つ手法、ツール、ライブラリーを総まとめ。 開発進行中も本番モードでの運用時も、ソフトウェアアプリケーションにおいてロギングは大切です。 サーバーを運用しているなら、サーバーサイドの言語選択にかかわりなく無数のライブラリーを利用でき、広範に及ぶストレージメカニズムやログ出力を扱う際の各種ツールも使えます。 しかし、クライアント側アプリケーションとなるとロギングは見過ごされがちで、利用できる手法もかなり限られています。 この記事ではクライアント側アプリケーション、特にJavaScriptを中心としたシングルページアプリケーション（SPA）におけるロギングの実装方法を紹介します。 コンソール エラーとメッセージのロギング方法でもっとも一般的かつ分かりやすいのは、おそらくコンソールの使
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Microservices: Myth, Madness, or Magic?
useState in React: A complete guide - LogRocket Blog