Understanding design patterns in TypeScript and Node.js - LogRocket Blog
Editor’s note: This article was updated 27 September 2022 to include information about state patterns and anti-patterns in TypeScript, as well as to make general revisions to the article. Design patterns are solutions to recurring problems in software application development. There are three fundamental types of design patterns, and within each one a number of unique patterns to choose from. In th
> BTC: bc1qs0sq7agz5j30qnqz9m60xj4tt8th6aazgw7kxr ETH: 0x1D834755b5e889703930AC9b784CB625B3cd833E USDT(Tron): TPrCq8LxGykQ4as3o1oB8V7x1w2YPU2o5n Ton: UQAtBuFWI3H_LpHfEToil4iYemtfmyzlaJpahM3tFSoxomYQ Doge: D7GMQdKhKC9ymbT9PtcetSFTQjyPRRfkwTdismiss OOP: the worst thing that happened to programming [2/24/2025] In this article, we will try to understand why OOP is the worst thing that happened to prog
はじめに こむろです。 Spring4Shell についてです。どうせお前ら調査してたんだろ？と思ったあなた、大正解です。 結論 非常に広範な影響がありましたが、現時点で、Spring Framework 本体への修正パッチがすでに適用されています。そのためこれに準じたアップデートを実施することで脆弱性を回避できます。 spring-boot-2-6-6 spring-boot-2-5-12 spring-framework-5.3.18 Tomcat 9.0.62 またこれらのアップデートができない場合、以下の対応を取ることもできます。 不要なパラメータのマッピングを行わないようにコードを追加する （Binding のブラックリストへ class.* 系を追加） Java8 へ一旦ダウングレードする Tomcat 9.0.62 へ Update することで設定値自体の書き換えをできないよ
Lessons from Writing a Compiler
The prototypical compilers textbook is: 600 pages on parsing theory. Three pages of type-checking a first-order type system like C. Zero pages on storing and checking the correctness of declarations (the “symbol table”). Zero pages on the compilation model, and efficiently implementing separate compilation. 450 pages on optimization and code generation. The standard academic literature is most use
`undefined` vs. `null` revisited
Many programming languages have one “non-value” called null. It indicates that a variable does not currently point to an object – for example, when it hasn’t been initialized yet. In contrast, JavaScript has two such non-values: undefined and null. In this blog post, we examine how they differ and how to best use or avoid them. undefined vs. null # Both values are very similar and often used inte
Today we’re excited to announce the release of TypeScript 5.2! If you’re not familiar with TypeScript, it’s a language that builds on top of JavaScript by making it possible to declare and describe types. Writing types in our code allows us to explain intent and have other tools check our code to catch mistakes like typos, issues with null and undefined, and more. Types also power TypeScript’s edi
Golang Mini Reference 2022: A Quick Guide to the Modern Go Programming Language (REVIEW COPY)
Golang Mini Reference 2022 A Quick Guide to the Modern Go Programming Language (REVIEW COPY) Harry Yoon Version 0.9.0, 2022-08-24 REVIEW COPY This is review copy, not to be shared or distributed to others. Please forward any feedback or comments to the author. • feedback@codingbookspress.com The book is tentatively scheduled to be published on September 14th, 2022. We hope that when the release da
Today we’re excited to announce our Release Candidate of TypeScript 5.2! Between now and the stable release of TypeScript 5.2, we expect no further changes apart from critical bug fixes. To get started using the RC, you can get it through NuGet, or through npm with the following command: npm install -D typescript@rc Here’s a quick list of what’s new in TypeScript 5.2! using Declarations and Explic
Announcing Dart 3
Hello from Google I/O 2023. Today, live from Mountain View, we’re announcing Dart 3 — the largest Dart release to date! Dart 3 contains three major advancements. First, we’ve completed the journey to 100% sound null safety. Second, we’ve added major new language features for records, patterns, and class modifiers. Third, we’re giving a preview of the future, where we broaden our platform support w
us-16-MunozMirosh-A-Journey-From-JNDI-LDAP-Manipulation-To-RCE
A JOURNEY FROM JNDI/LDAP MANIPULATION TO REMOTE CODE EXECUTION DREAM LAND Alvaro Muñoz (@pwntester) Oleksandr Mirosh Who are we • Alvaro Muñoz (@pwntester) • Principal Security Researcher, HPE Fortify • Oleksandr Mirosh • Senior QA Engineer, HPE Fortify Agenda • Introduction to JNDI • JNDI Injection • RMI Vector • Demo: EclipseLink/TopLink • CORBA Vector • LDAP Vector • LDAP Entry Poisoning • Demo
Over the course of my Spring 2020 semester at Harvey Mudd College, I developed a self-hosting compiler entirely from scratch. This article walks through many interesting parts of the project. It’s laid out so you can just read from beginning to end, but if you’re more interested in a particular topic, feel free to jump there. Or, take a look at the project on GitHub. Table of contents What the pro
State of the Common Lisp ecosystem, 2020 🎉 - Lisp journey
NEW: 9 videos (86min) about CLOS on my Common Lisp course. Out of 7h+ of content. Rated 4.7/5. Learn more and stay tuned. 🎥 I also have cool Lisp showcases on Youtube . The last ones: how to build a web app in Common Lisp, part 1 and 2. This is a description of the Common Lisp ecosystem, as of January, 2021, from the perspective of a user and contributor. The purpose of this article is both to gi
Today we are excited to announce the availability of TypeScript 5.2 Beta. To get started using the beta, you can get it through NuGet, or through npm with the following command: npm install -D typescript@beta Here’s a quick list of what’s new in TypeScript 5.2! using Declarations and Explicit Resource Management Decorator Metadata Named and Anonymous Tuple Elements Easier Method Usage for Unions o
In the previous article we introduced Records, a new preview feature in Java 14. Records are providing a nice compact syntax to declare classes that are supposed to be dumb data holders. In this article, we’re going to see how Records are looking like under the hood. So buckle up! Class Representation Let’s start with a very simple example: public record Range(int min, int max) {} How about compil
WebKit Features in Safari 18.2
Dec 9, 2024 by Jen Simmons, Ada Rose Canon, David Degazio, Yoel Hawa, Etienne Segonzac, and John Wilander ContentsCSSSpatial videos and photosWebXRGenmojiMediaHTMLWebAssemblyWeb APIJavaScriptSecurity and PrivacyWeb InspectorWebDriverWKWebViewBug Fixes and moreUpdating to Safari 18.2Feedback Today marks the arrival of Safari 18.2. With it, WebKit adds 61 new features and 111 resolved issues. Highli
It is now 45+ years since C++ was first conceived. As planned, it evolved to meet challenges, but many developers use C++ as if it was still the previous millennium. This is suboptimal from the perspective of ease of expressing ideas, performance, reliability, and maintainability. Here, I present the key concepts on which performant, type safe, and flexible C++ software can be built: resource mana
Rust Language Cheat Sheet 26. August 2021 Contains clickable links to The Book , Rust by Example , Std Docs , Nomicon , Reference . Data Structures Data types and memory locations defined via keywords. Example Explanation struct S {} Define a struct with named fields. struct S { x: T } Define struct with named field x of type T. struct S (T); Define "tupled" struct with numbered field .0 of type
Safer Usage Of C++
Safer Usage Of C++ This document is PUBLIC. Chromium committers can comment on the original doc. If you want to comment but can’t, ping palmer@. Thanks for reading! Google-internal short link: go/safer-cpp Authors/Editors: adetaylor, palmer Contributors: ajgo, danakj, davidben, dcheng, dmitrig, enh, jannh, jdoerrie, joenotcharles, kcc, markbrand, mmoroz, mpdenton, pkasting, rsesek, tsepez, awhalle
Jetpack Compose とandroidx.lifecycle 2.5.0 の SavedStateHandle 連携強化を試す｜株式会社カウシェ
Jetpack Compose とandroidx.lifecycle 2.5.0 の SavedStateHandle 連携強化を試す こんにちは、株式会社カウシェで Android 版アプリを開発している @sintario です。 今回は Jetpack Compose でのアプリ開発における androidx.lifecycle 2.5.0 を使った状態管理のシンプルな実装プラクティスをご紹介します。 本稿執筆時のライブラリKotlin 1.7.0 kotlinx.coroutines 1.6.3 google.dagger 2.42 (Hilt を使っています) Jetpack Compose 1.2.0 androidx.hilt-navigation-compose 1.0.0 androidx.lifecycle-viewmodel-compose 2.5.0 問題設定アプ
The State Of Web Workers In 2021 — Smashing Magazine
The web is single-threaded. This makes it increasingly hard to write smooth and responsive apps. Workers have a bad rep, but can be an important and useful tool in any web developer’s toolbelt for these kinds of problems. Let’s get up to speed on Workers on the Web! I’m weary of always comparing the web to so-called “native” platforms like Android and iOS. The web is streaming, meaning it has none
React Best Practices – Tips for Writing Better React Code
By Jean-Marc Möckel Two years ago, I started to learn and use React. And today I'm still using it at my day job as a Software Developer and in my own side projects. During that time I've come across a lot of "typical" issues. So I searched around and found some best practices that I've integrated into my workflow, and I've come up with things that have made my life or my team members' lives easier
How a Jenkins Job Broke our Jenkins UI - Slack Engineering
Maria Sabastian Senior Software Engineer, Mobile Build & Release Artwork courtesy of the Jenkins project. At Slack we manage a sophisticated Jenkins infrastructure to continuously build and test our mobile apps before release. We have hundreds of jobs running in a variety of different environments. One day something very odd happened — our Jenkins UI stopped working although the jobs continued to
Safe C++
1 Introduction 1.1 The call for memory safety Over the past two years, the United States Government has been issuing warnings about memory-unsafe programming languages with increasing urgency. Much of the country’s critical infrastructure relies on software written in C and C++, languages which are very memory unsafe, leaving these systems more vulnerable to exploits by adversaries. Nov. 10, 2022
Ruby's Unexpected Comeback: How AI Coding Tools Give Ruby an Edge
The Perceived Decline of Ruby Over the past decade, Ruby and its popular web framework Ruby on Rails have seemingly lost some of their former glory. Once the darling of startups and web developers, Ruby has faced increasing competition from newer frameworks and languages. JavaScript frameworks like NextJS, along with backend solutions like Node.js and Django, have captured significant market share
Introduction: These Aren’t the JSONs You’re Looking For JSON (JavaScript Object Notation) was designed as a simple, lightweight, and human-readable data interchange format, often positioned as a more accessible alternative to XML. It has become the de facto standard for web APIs and system integration. However, while the specification itself is straightforward, different programming languages and
I’ve been told I need to write this idea down – I figure this one’s a good enough excuse to start one of them programming blogs. TL;DR You can move-constructors the Rust! It requires a few macros but isn’t much more outlandish than the async pinning state of the art. A prototype of this idea is implemented in my moveit crate. The Interop Problem Rust is the best contender for a C++ replacement; th
Here is a list of common JavaScript interview questions with detailed answers to help you prepare for the interview as a JavaScript developer. JavaScript continues to be a cornerstone of web development, powering dynamic and interactive experiences across the web. As the language evolves, so does the complexity and scope of interview questions for JavaScript developers. Whether you’re a fresher de
Test Doubles A Test Double is an object that can stand-in for a real object in a test, similar to how a stunt double stands in for an actor in a movie. As I wrote in “The importance of the Tests in our Software”, there are several types of tests. They are also known as Test Doubles instead of “Mocks”. The five types of Test Doubles are: Dummy: It is used as a placeholder when an argument needs to
Here is a list of common Android interview questions with detailed answers to help you prepare for the interview as an Android app developer. This article is designed to assist aspiring Android developers with a comprehensive set of interview questions, covering a wide spectrum of areas including basic programming principles, Android-specific components, design patterns, and best practices in mobi
A History of Clojure
71 A History of Clojure RICH HICKEY, Cognitect, Inc., USA Shepherd: Mira Mezini, Technische Universität Darmstadt, Germany Clojure was designed to be a general-purpose, practical functional language, suitable for use by professionals wherever its host language, e.g., Java, would be. Initially designed in 2005 and released in 2007, Clojure is a dialect of Lisp, but is not a direct descendant of any
Automated tests are important. Without them, programmers waste a huge amount of time manually checking and fixing their code. Unfortunately, many automated tests also waste a huge amount of time. The easy, obvious way to write tests is to make broad tests that are automated versions of manual tests. But they’re flaky and slow. Folks in the know use mocks and spies (I say “mocks” for short in this
Dependency Injection in Compose
OverviewDependency injection is a programming pattern which prescribes that classes do not construct instances of their dependencies, instead such instances are provided. This pattern enables separation of concerns, and increases testability, reusability, and ease of maintenance. See Dependency injection in Android to review the benefits of dependency injection and its core concepts. You may alrea
Summary Enable JavaDoc documentation comments to be written in Markdown rather than solely in a mixture of HTML and JavaDoc @-tags. Goals Make API documentation comments easier to write and easier to read in source form by introducing the ability to use Markdown syntax in documentation comments, alongside HTML elements and JavaDoc tags. Do not adversely affect the interpretation of existing docume
Update 2022-12-15: New section “How will this proposal affect future JavaScript APIs?” In this blog post, we look at the ECMAScript proposal “Iterator helpers” by Gus Caplan, Michael Ficarra, Adam Vandolder, Jason Orendorff, Kevin Gibbons, and Yulia Startsev. It introduces utility methods for working with iterable data: .map(), .filter(), .take(), etc. The style of the proposed API clashes with th
Summary In constructors in the Java programming language, allow statements that do not reference the instance being created to appear before an explicit constructor invocation. This is a preview language feature. Goals Give developers greater freedom to express the behavior of constructors, enabling the more natural placement of logic that currently must be factored into auxiliary static methods,
Announcing ICU4X 1.0
News, announcements, release info, and calendar updates from the Unicode Consortium I. IntroductionHello! Ndeewo! Molweni! Салам! Across the world, people are coming online with smartphones, smart watches, and other small, low-resource devices. The technology industry needs an internationalization solution for these environments that scales to dozens of programming languages and thousands of human
[Simon Tatham, initial version 2023-09-01, last updated 2025-03-25] [Coroutines trilogy: C preprocessor | C++20 native | general philosophy ] Introduction Why I’m so enthusiastic about coroutines The objective view: what makes them useful? Versus explicit state machines Versus conventional threads The subjective view: why do I like them so much? “Teach the student when the student is ready” They s
Object-oriented programming is out of fashion now, and it has been for a while. Rarely are new programming languages intentionally object-oriented. And there are good reasons for this: OO often requires a lot of boilerplate, it forces code into unnatural object hierarchies, and it encourages hidden mutable state. But, if we made a new statically-typed OO language from scratch in 2021, something in
Java Interview Questions
Java remains one of the most common and popular programming languages in the world because of its strong features. Therefore, it’s no surprise that good Java programmers are very much sought after by almost all organizations across the world – be it startups or large multinational corporations. Considering the above, we created a list of common job interview questions about Java programming with d
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The Haskell School of Music — From Signals to Symphonies — Paul Hudak Yale University Department of Computer Science Version 2.4 (February 22, 2012) i The Haskell School of Music — From Signals to Symphonies — Paul Hudak Yale University Department of Computer Science New Haven, CT, USA Version 2.4 (February 22, 2012) Copyright c � Paul Hudak January 2011 All rights reserved. No part of this public
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OOP: the worst thing that happened to programming
cve-2022-22965 Spring4Shell の影響調査 | DevelopersIO
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