500년간 사라졌던 금서, 설공찬전의 내용 전북 순창에 설충수란 양반이 살고 있었다. 그는 아들을 비롯한 가족과 살구나무 아래서 밥을 먹고 있었다. 그런데 오른손잡이였던 아들이 느닷없이 왼손으로 밥을 먹기 시작했다. 설충수는 조선시대 선비로서 당연히 지적질을 했다. “뭐 하는 짓이냐? 양반이 왼손으로 젓가락질을 하다니 어서 오른손으로 밥을 멱거라.” 그 순간, 순진하던 아들이 갑자기 아버지를 노려보며 말했다. "(괴물 같은 목소리를 내며) 몰랐소? 저승에서는 다 왼손으로 밥을 먹는데? 그리고 숙부!! 내가 아직도 아들로 보이시오?…

In the last article, we discussed building mazes using recursion and immutable data structures. But all we did there is create a graph. That is, we built a data structure in memory. We didn’t talk at all about how we render it. But the beauty of the web platform is that we have so many options. In…

This article explains how these four things fit together and shows some examples of what they are used for. Derivatives Derivatives are the most fundamental concept in calculus. If you have a function, a derivative tells you how much that function changes at each point. If we start with the function…

Last time, we added the ability to create tracking pointers from const objects. But we discovered that you could not convert a tracking_ptr to a tracking_ptr. But this should be possible, because the available operations on a tracking pointer to a const object is a subset of the operations available…

Last time, we added the ability to create non-modifying tracking pointers, but it required that you start with a non-const trackable object. But what if you want to create a non-modifying tracking pointer to an object to which you have only a const reference? It took me a few tries before I hit upon…

Last time, we tried to add non-modifying trackers to our tracking pointers implementation. I noted at the end that our attempt was wrong. The problem is in the code we didn’t change: void set_target(T* p) noexcept { for (tracking_node* n = m_trackers.next; n != &m_trackers; n = n->next) {…

Let’s add non-modifying trackers to our tracking pointers implementation. That is, a tracking pointer that gives you only read-only access to the tracked object. The idea is that tracking pointers and non-modifying tracking pointers all share the same circular doubly linked list. The only difference…

Our previous attempt to create a tracking pointer class had the perhaps-undesirable property that copying a const tracking pointer is not permitted. This requirement arose because copying a tracking pointer causes the copy to be linked into the circular linked list of the source, and that means…

Aug 14, 2025 When writing unit tests, it’s a good idea to test not only the happy path, but all of the failure modes as well. One way to achieve this is through error injection, also known as “failure points”. A contrived example Suppose we have a function that takes a string as input, splits it…

Zellij is a terminal workspace and multiplexer. One of the unique traits of terminal multiplexers is their ability to keep sessions alive in the background without a terminal attached to them. In the recent Zellij version we released a built-in web client, allowing users to attach to these sessions…

After learning the rules and basics of chess, there are various concepts that beginners should learn in order to keep improving. Some of these concepts include opening principles, middle game concepts, endgame fundamentals, and strategy. In this handbook, we’ll focus on endgame fundamentals. You’ll…

This feature first appeared in July 2024 on Londonist: Time Machine, our much-praised history newsletter. To be the first to read new history features like this, sign up for free here. The Burdett-Coutts drinking fountain. Image: Matt Brown Everything beneath this brief introduction was written on…

In today’s issue, we will discuss the main API architectural styles, their usage, the pros and cons of each style, and recommendations for when to use each style. Also, we will see the new OWASP Top 10 API security risks list, with additions and reasoning. As a bonus, you will get an API Security…

Have you ever wondered how fast Netflix is when streaming a movie to your house? There is one component that is very important here, and it is called CDN (Content Delivery Network). It is a network of servers that move data fast through the network using cache servers and edge servers in Points of…

Building APIs is one of the most important tasks for developers in modern engineering. These APIs allow different systems to communicate and exchange data. While REST has been the de facto standard for implementing APIs for many years, new emerging standards, such as gRPC and GraphQL, are available…

You probably already have seen those "Sign in with Google" or "Connect with GitHub" buttons, which enable you to log in and access different services without entering a new set of credentials. Whether logging into a website using your social media account or authorizing a third-party app to interact…

In this issue, we talk about the following: How to Learn SQL? What is the Difference Between Inner, Left, Right, and Full Join? SQL Queries Run Order What is Query Optimizer? Top 20 SQL Query Optimization Techniques Tools & Resources So, let’s dive in. Structured Query Language (SQL) is a…

API Gateways, Reverse Proxy Servers, and Load Balancers are essential components in modern software architecture. Each serves a specific role that enhances web application performance, security, and scalability. Yet, we often need clarification about the roles of those services. Here are the main…

Microservice architecture has revolutionized how companies build and scale software. Giants like Netflix and Amazon leverage it to deliver new features rapidly and efficiently. But what exactly is microservice architecture, and why does it matter? This post breaks down the core concepts, benefits,…

An API management tool known as an API Gateway sits between a client and a group of backend services. It performs the function of a reverse proxy by accepting all application programming interface (API) calls, aggregating the different services needed to fulfill them, and returning the right…

This week’s issue brings to you the following: MVC, MVP, MVI, MVVM, and VIPER architecture patterns How Shopify Builds a Resilient Payment System Bonus: Cloud Databases Cheat Sheet So, let’s dive in. MVC, MVP, MVI, MVVM, and VIPER architecture patterns Architecture patterns are blueprints for…

When we talk about software today, we should know that its importance is now at the very end of the spectrum of different technologies used. For example, in the aerospace world, the stakes are incredibly high, and software glitches can lead to catastrophic outcomes. This issue will explore some…

Single Sign-On (SSO) is an authentication process that allows users to access multiple applications with a single login. This is accomplished using a central authentication server that stores the user's credentials and verifies them for each application. The idea of SSO is not new in the Cloud era.…

Have you ever pressed play on Netflix and wondered what technology ensures your video starts instantly and plays without interruptions? Simply pressing play triggers a global technological symphony that delivers content to over 301 million subscribers in 190 countries. But that’s not all, this is…

validate verb val·​i·​date ˈva-lə-ˌdāt validated; validating Synonyms of validate transitive verb 1 a : to make legally valid : ratify b : to grant official sanction to by marking validated her passport c : to confirm the validity of (an election) also : to declare (a person) elected 2 a : to…

최근 미 플로리다주가 10년만에 수렵을 허가한 흑곰.(아메리카흑곰 또는 미국흑곰) /미 농무부(USDA) 언론계 은어 중에 ‘초 친다’라는 말이 있습니다. 지나치게 많은 수식어를 쓰거나, 쓰는 사람의 주관을 주입한다는 뜻이죠. ‘초를 많이 치는’ 기사일수록 본질에서 벗어나고 공감을 강요당한다는 느낌을 갖게 해 가독성을 떨어뜨릴 수 있다는 우려에서 제기된 경계의 표현이라고 봅니다. 이는 달리 말해서 있는 그대로 사실만을 전달하더라도 충분히 기사가 말하고자 하는 본질을 알릴 수 있다는 뜻이죠. 오늘은 초 없이도 사안의 심각성을…

Outside the train window, there’s a flickering reel of flowering fruit trees, lambs and swans nesting on the marshy levels. Following the Exe estuary towards Dawlish, where the railway runs along the beach, flocks of waders are gathering on the sandbanks, backed by boats and glinting water. The…

salient 1 of 2 adjective sa·​lient ˈsā-lyənt -lē-ənt Synonyms of salient 1 : moving by leaps or springs : jumping 2 : jetting upward a salient fountain 3 a : projecting beyond a line, surface, or level b : standing out conspicuously : prominent especially : of notable significance similar to ……

Capacitive touch sensors are entirely in the domain of DIY, requiring little more than a carefully-chosen conductive surface and a microcontroller. This led [John Phillips] to ask why not embed such touch buttons directly into a 3D print? Button locations and labels can be made as part of the 3D…

Ellen Adams/The Conversation The Minoan culture was the first highly complex society on modern European soil, with palaces, writing, stunning art – and even flushing toilets. The Minoans lived in the bronze age (circa 3000-1200BC) on the Mediterranean island of Crete, which served as a stepping…

Here’s a story you might have read before in a popular science book or seen in a documentary. It’s the one about early Earth as a lifeless, volcanic hellscape. When our planet was newly formed, the story goes, the surface was a barren wasteland of sharp rocks, strewn with lava flows from erupting…

Definition Definition Did you know? Example Sentences Word History Rhymes Entries Near Related Articles Podcast Cite this EntryCitation Share Kids DefinitionKids More from M-W To save this word, you'll need to log in. Log In euphemism noun eu·​phe·​mism ˈyü-fə-ˌmi-zəm Synonyms of euphemism : the…