開発スタッフがアプリ関連の最新技術やニュースをご紹介します。

aws等でインスタンスに指定したキーペアのプライベートキー(.pem)を使用して
PuTTYでssh接続できない場合の対処方法をシェアします。

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There are numerous JS frameworks. It’s not possible for anyone to tell considering the way that each JS framework is great for one pack of challenges and not the best one for another.

JavaScript was at first used exceptionally for the client-side. However, nowadays JavaScript is also used as a server-side programming language.

1. React

React is one of the finest front-end open-source JavaScript frameworks that allow developers to create rich user interfaces. Created by a team of Facebook developers, React introduced functional, declarative, and component-based styles.  React is a complex framework for new developers to learn, use, and understand, but it has an extensive community. 

Pros:

• Plenty of reusable components to build business logic
• Ease of integration with front-end and back-end
• Unidirectional data flow with flux controls
• SEO-friendly JavaScript framework
• Huge support community
• Capacity to test and debug rapidly

Cons:

• Only covers the UI layer of the app
• Have to deal with complex state management 
• Constant upgrades make it difficult for developers to keep up with the changes
• New developers may find JSX to be a barrier

2. Angular

Angular is one of the top-rated JavaScript UI frameworks that developers utilize to build classy single-page web applications. The framework leverages HTML syntax on dynamic web pages.

Pros:

• Component-based architecture
• High-class server performance
• Two-way data binding 
• A rich collection of third-party integrations
• A massive community of developers

Cons:

• Need to learn JavaScript and Typescript
• Struggles with SEO due to poor accessibility
• Migration from one version to another is difficult
• Debugging the scope can be difficult

3. Vue JS

Vue.js is one of the most versatile front-end JavaScript frameworks. It’s also known as a progressive framework due to its capability to facilitate the design of high-end single-page web applications through dual integration mode. The framework follows the MVMM (Model-View-View-Model) architecture pattern. Besides that, Vue.js is simple, unrestricted, and an easy-to-adopt framework.   

Pros:

• Quick and easy configuration due to MVVM architecture
• Easy to learn, use, and understand even for beginners
• Lightweight framework with a small build size
• Seamless integration with third-party apps

Cons:

• Lack of high-end and effective plugins
• Older versions of iOS and Safari browsers can cause problems
• Difficulty with two-way binding

4. Svelte

Svelte JS is an open-source, web component-based front-end development framework.It is possible to create components using Svelte JS using the languages you’re content using (JavaScript, HTML, or CSS).

Pros:

• Component-based model pattern
• Easy to use, learn, and understand
• One of the most small-sized builds 
• Supports both client and server-side rendering

Cons:

• Not much IDE support available in the market
• Doesn’t have the backing of tech giants like Vue, Angular, and React
• Absence of third-party components
• Difficult to scale up the application

5. Express JS

Express JS is an open-source and minimalistic back-end JavaScript framework based on Node.js that developers use to build complex APIs and web applications. One of the major advantages of this Express JS framework is fast server-side programming. 

Pros:

• Active community support
• Rich set of documentation
• Powerful routing mechanism
• Seamless connectivity with all databases
• Accelerates web app development process

Cons:

• Security and code quality can be an issue
• Middleware creates issues for many clients
• Error messages have no description
• Hard to find an optimal way to write code for server-side

Tsuki

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NVIDIAのGeforceシリーズ向けWindowsソフトの
Geforce Experienceに搭載されているポストエフェクト機能のFree Styleに
レイトレーシングを行うフィルターが追加されたようです。

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Today, I would like to share about four common mistakes that should be careful when develop with NodeJS. Let’s take a look.

Blocking the Event Loop

Since Node JS comes with a single-threaded environment, no two parts of a Node JS application can run parallelly.

So, If the event loop is blocked, it causes blocking everything.

The solution is to use open-source modules like StrongOps.

StrongOps can identify and fix any delays in the event loop and prevent from blocking the event loop.

Trying to Execute Multiple Callbacks

Callbacks is used to allow asynchronous elements to communicate with each other.

However, executing the same callbacks or multiple callbacks all at once can cause interface freeze.

Therefore, it’s important to ensure you’re not continuously pressing for callbacks multiple times.

There are two ways to avoid that.

First, you can wrap the callback so you’ll be notified each time a callback is executed twice.

The second solution is to add a return before the callback to prevent invoking the same callback more than once.

Callback Hell

Callback Hell means  multiple nested callbacks that make nesting callbacks difficult and impossible to read & debug the written code.

There are many ways to keep the code easy-to-read and debug such as using promises.

A promise is basically a value returned to confirm the processing done by an asynchronous function. In simple terms, promises can be nested to make complex code look clear and easier to maintain.

Another way is to use the async module that provides a straight forward, powerful functions to work with asynchronous JavaScript.

Using Console.log for Debugging

Console.log in the NodeJS is to print almost anything to the console. When Console.log is used to debug, it restarts the server and slows down the performance of the application.

We can’t use console.log every time. So instead of console.log, we can use the Debug Library.

This is all for now.

Hope you enjoy that.

By Asahi

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Regardless of your profession or designation, you must adapt to the constant changes that occur in your workplace. You need to learn new work skills through your work to adapt to changes in the workplace, develop your career, and promote career opportunities.

There might be plenty of trending and demanding technologies for 2022. I will describe a few which are demanding and also depending on my personal favors.

Artificial Intelligence (AI)

Artificial intelligence experts focus on building machines that are programmed to think like humans. These machines can perform tasks that require human intelligence. It exists a variety of actions related to human intelligence, such as knowledge representation, problem solving, learning, and reasoning.

AI has become so popular lately. The demand for professionals with knowledge, experience and skills in AI is very high. It goes without saying that careers in the field of AI have potential and are expected to continue in the future.

Blockchain

Blockchain is a digital ledger of transactions that is replicated and distributed thousands of times through a network of computer systems on the blockchain. This is the process of recording information in a way that makes system changes and hacks difficult or impossible.

Given the market trends, the demand for blockchain professionals continues to grow. If you have all the important blockchain-related tools and knowledge, you certainly have a brilliant career.

DevOps

A set of practices and tools that combine software development and IT operations to shorten the system development life cycle. Simply put, its goal is to make the software creation, testing, and launch process faster and more reliable.

DevOps experts are dedicated to creating software and verifying code versions to make sure everything goes smoothly. This is one of the most expensive remote jobs on the market.

AR & VR

Augmented reality (AR) and virtual reality (VR) are technologies that connect the real and virtual worlds. These technologies provide users with a visual view of information and content as if it were in the world. Many industries such as healthcare, travel, aviation and automotive are developing augmented reality solutions in training applications.

AR adds digital elements to live views to enhance the usefulness of digital devices in everyday tasks such as information retrieval and shopping. Virtual reality, on the other hand, allows users to experience what it is like to go anywhere.

While augmented reality provides an interactive experience of real-world scenarios, virtual reality creates a fully immersive virtual environment.

There are still other demanding techs like I said in above such as cyber security, robotics, machine learning etc. Wish everyone may be healthy and have a productive year.

Yuuma

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