В этом докладе, я хочу сравнить кластеризацию HTTP, TCP, UDP на процессах и потоках в NodeJS. Оценить производительность и использование ресурсов при разных подходах.
NodeJS is a server-side JavaScript platform that uses Google's V8 JavaScript engine and a non-blocking I/O model. It allows for 100% CPU usage on a single thread by using an event-driven, non-blocking I/O model. NodeJS is well-suited for real-time applications and can handle more requests per second than traditional threaded servers like Apache while using less memory. It allows for common codebases and testing across front-end and back-end JavaScript applications using many popular frameworks. Comet applications also benefit from NodeJS's non-blocking I/O model which allows for long-held connections without dedicating a thread per connection.
Fundamental of Node.JS - Internship Presentation - Week7Devang Garach
Fundamental of Node.JS - Internship Presentation - Week 7
What is Node.JS
Features of Node.JS
Node.JS Architecture
Core modules in Node.JS
Node.JS Installation
npm
Creating first node.js application
This document provides an introduction and overview of Node.js, including how to install it, introductory JavaScript concepts, and how to use Node.js modules and NPM. It discusses Node.js' event-driven and non-blocking architecture making it suitable for real-time applications. It also covers initializing NPM, creating modules, and building a simple API with Express.
An Introduction to the world of Javascript and NodeJS. The presentation captures Javascript's history, its evolution and its progression towards a language for an end-to-end development.
util.promisify converts callback-based functions to Promise-based functions by standardizing their error-first callbacks. It handles both standard (err, value) callbacks as well as non-standard callbacks with multiple arguments. Custom promisified functions can be created by overriding the util.promisify.custom symbol. While Bluebird may still be faster, util.promisify is preferable since it is a built-in Node.js core utility and keeps code from depending on third-party dependencies.
This document discusses a simple and cheap logging server that logs HTTP request fragments to S3. It saves batches to S3 every few seconds for low cost of around $17 per day. It also discusses building cross-platform desktop applications using JavaScript and libraries instead of frameworks, communicating between components using JSON message passing. The document outlines approaches for Mac, Windows, and Linux and mentions some TODO items and future plans.
Azure functions: from a function to a whole application in 60 minutesAlessandro Melchiori
This document discusses Azure Functions and serverless computing. It describes how Azure Functions evolved from WebJobs and provides a lightweight way to run .NET code on Azure without having to manage infrastructure. Functions can be triggered by events and use bindings to integrate with data sources. The document demonstrates how to create Function Apps locally or on Azure using the CLI or portal, and how to configure runtime versions and bindings. It also introduces the Durable Functions extension for orchestrating function workflows and chaining or fan out/fan in functions.
NodeJS is a server-side JavaScript platform that uses Google's V8 JavaScript engine and a non-blocking I/O model. It allows for 100% CPU usage on a single thread by using an event-driven, non-blocking I/O model. NodeJS is well-suited for real-time applications and can handle more requests per second than traditional threaded servers like Apache while using less memory. It allows for common codebases and testing across front-end and back-end JavaScript applications using many popular frameworks. Comet applications also benefit from NodeJS's non-blocking I/O model which allows for long-held connections without dedicating a thread per connection.
Fundamental of Node.JS - Internship Presentation - Week7Devang Garach
Fundamental of Node.JS - Internship Presentation - Week 7
What is Node.JS
Features of Node.JS
Node.JS Architecture
Core modules in Node.JS
Node.JS Installation
npm
Creating first node.js application
This document provides an introduction and overview of Node.js, including how to install it, introductory JavaScript concepts, and how to use Node.js modules and NPM. It discusses Node.js' event-driven and non-blocking architecture making it suitable for real-time applications. It also covers initializing NPM, creating modules, and building a simple API with Express.
An Introduction to the world of Javascript and NodeJS. The presentation captures Javascript's history, its evolution and its progression towards a language for an end-to-end development.
util.promisify converts callback-based functions to Promise-based functions by standardizing their error-first callbacks. It handles both standard (err, value) callbacks as well as non-standard callbacks with multiple arguments. Custom promisified functions can be created by overriding the util.promisify.custom symbol. While Bluebird may still be faster, util.promisify is preferable since it is a built-in Node.js core utility and keeps code from depending on third-party dependencies.
This document discusses a simple and cheap logging server that logs HTTP request fragments to S3. It saves batches to S3 every few seconds for low cost of around $17 per day. It also discusses building cross-platform desktop applications using JavaScript and libraries instead of frameworks, communicating between components using JSON message passing. The document outlines approaches for Mac, Windows, and Linux and mentions some TODO items and future plans.
Azure functions: from a function to a whole application in 60 minutesAlessandro Melchiori
This document discusses Azure Functions and serverless computing. It describes how Azure Functions evolved from WebJobs and provides a lightweight way to run .NET code on Azure without having to manage infrastructure. Functions can be triggered by events and use bindings to integrate with data sources. The document demonstrates how to create Function Apps locally or on Azure using the CLI or portal, and how to configure runtime versions and bindings. It also introduces the Durable Functions extension for orchestrating function workflows and chaining or fan out/fan in functions.
Two of the most underused libraries are LogBox and CacheBox. The biggest feature they offer is abstraction. You can decouple your app's code from a specific logging or caching mechanism so you can change it out in the future with no big changes to your app. LogBox and CacheBox come bundled with ColdBox but can also be used directly in a legacy codebase as well. In this session we'll demystify some of the basic settings and usage of these powerful libraries to get you up and running and familiar with some of the many options they come with.
This document discusses Pedro Dias's experience with OpenNebula. It describes how he used OpenNebula at his hosting company PTisp to replace their previous IaaS solution. OpenNebula met their requirements of being open, avoiding vendor lock-in, and having a low maintenance stack. The document outlines some customizations made to OpenNebula, such as using LVM instead of cLVM and developing tools like ONE Janitor to help with storage and VM sanitization. It also mentions contributions to the OpenNebula project and developing a Node.js addon and multi-tenant web panel called Cloudash.
The document discusses HTML5 as a platform for user interfaces. It outlines several new features of HTML5, including the <canvas> element for drawing, WebGL for 3D graphics, multi-touch support, local storage with Web SQL databases, real-time updates with Web Sockets, improved file handling, and offline application caching. The document argues that HTML5 provides many of the capabilities of native applications and recommends using HTML5 and JavaScript for cross-platform user interface development.
ScalaCache is a facade library that provides a simple API for caching methods across various cache systems like Google Guava, Ehcache, Memcached, and Redis. It uses macros to generate cache keys and automatically cache method return values. This avoids issues with traditional approaches using the Java API or Spring which involve runtime overhead or restrictions. ScalaCache aims to improve features like asynchronous support, versioning, custom serialization, and browser caching integration.
Phone Home: A client-side error collection systemChris Birchall
This document summarizes Phone Home, a system to collect client-side errors from users' browsers. The Phone Home client runs JavaScript in users' browsers to collect errors and send them via HTTP POST requests to the Phone Home server. The server is built with Scalatra and saves the error data to MongoDB. It was created to debug unreproducible jQuery errors in IE browsers. Features include error handling, page load timing collection, custom field support, and an admin UI with stats and a recent events list. The server uses CORS to allow cross-domain requests from the Phone Home client. Data can also be analyzed using the ltsv4s library to parse and query the log files in Scala.
Libbitcoin is an open source C++ Bitcoin blockchain toolkit that includes several libraries for building blockchain applications and services. It includes libraries for the blockchain database (libbitcoin-blockchain), a server API (libbitcoin-server), a client wrapper for the API (libbitcoin-client), and a command line interface (libbitcoin-explorer). Libbitcoin aims to provide a complete third-party implementation of the Bitcoin protocol that is not controlled by any single entity.
The document discusses the C10K problem of handling 10,000 clients simultaneously on web servers and possible solutions like non-blocking, blocking, and asynchronous approaches. It then provides an overview of how Node.js uses an evented and asynchronous model with JavaScript to help solve the C10K problem by having a single-threaded event loop that handles I/O without blocking and allows for many connections.
The document provides an overview of Node.js, a JavaScript runtime environment for building scalable network applications. Some key points covered include:
- Node.js is built on Google's V8 JavaScript engine and is event-driven and non-blocking.
- It is well-suited for data-intensive real-time applications due to its lightweight and efficient nature.
- Node.js differs from other scripting languages by being non-blocking, single-threaded, and having an event-based approach built-in.
This slides are for meetup event from below link.
https://www.meetup.com/ja-JP/CodeChrysalis/events/245248864/
This mainly explains how backend program works in general and I implemented sample project with express and sequelizejs that are nodejs modules and PostgreSQL for a database. You can see sample project (learning material of backend with JavaScript) from below github link.
Repository for this slides:
https://github.com/duyoji/creating_api_with_express_and_postgresql
The document discusses MongoDB backup options including mongodump/mongorestore, storage-level backups, and the MongoDB Management Service (MMS) backup. MMS provides cloud-based, encrypted backups of MongoDB deployments with point-in-time recovery. It takes periodic snapshots of data and oplog to enable restores. Setup involves installing agents, registering with MMS, and an initial sync replicates data to MMS for backups.
OSMC 2018 | Stream connector: Easily sending events and/or metrics from the C...NETWAYS
Since Centreon 2.8.18, Centreon broker provides a new connector called “Stream connector”. With it, users have the possibility to create an output to any tool of their choice. The topic of this talk is to present this connector and its use through several examples.
The first JavaScript engine was created by Brendan Eich at Netscape, for the Netscape browser
It is a programming language used to make dynamic web pages and Server side apps(Node.js)
It gives logic to static HTML pages
We can Update DOM tree by javascript dynamically
OSMC 2018 | Visualization of your distributed infrastructure by Nicolai BuchwitzNETWAYS
In times of industrial IoT devices and cloud providers like AWS, which allow small and medium-sized companies to distribute their infrastructure around the world, it is becoming increasingly important to keep an overview. Here a few instances in Amsterdam, there a few in Tokyo and not to forget the satellites in Moscow. The Map Addon with its filters and dashboards helps to keep the overview in this constantly changing landscape and to recognize patterns and anomalies at an early stage.
This slide deck demonstrates the latest releases of Kubeless and Ballerina and shows how to develop and run Ballerina functions on Kubernetes with Kubeless.
Webinar: https://ballerina.io/learn/events/webinars/ballerina-serverless-with-kubeless/
This document discusses using BaseX, an XML database, for web applications. It describes GraphXQ, which uses RESTXQ and Graphviz to visualize graphs. It also describes CellarXQ, an Angular.js single page application that uses BaseX and OAuth for user authentication and data storage. Finally, it shows how to create a chatbot using BaseX, Node.js and Socket.io that passes messages to an XQuery script for processing.
This document discusses server-side event-driven programming using Node.js. It covers how Node.js uses an event loop and asynchronous non-blocking I/O to handle many connections concurrently with high performance. Common Node.js concepts are explained like first-class functions, callbacks, and event emitters. Node.js is compared to traditional threaded programming and shown to have advantages in scalability and efficiency. Example Node.js applications and APIs are provided.
Two of the most underused libraries are LogBox and CacheBox. The biggest feature they offer is abstraction. You can decouple your app's code from a specific logging or caching mechanism so you can change it out in the future with no big changes to your app. LogBox and CacheBox come bundled with ColdBox but can also be used directly in a legacy codebase as well. In this session we'll demystify some of the basic settings and usage of these powerful libraries to get you up and running and familiar with some of the many options they come with.
This document discusses Pedro Dias's experience with OpenNebula. It describes how he used OpenNebula at his hosting company PTisp to replace their previous IaaS solution. OpenNebula met their requirements of being open, avoiding vendor lock-in, and having a low maintenance stack. The document outlines some customizations made to OpenNebula, such as using LVM instead of cLVM and developing tools like ONE Janitor to help with storage and VM sanitization. It also mentions contributions to the OpenNebula project and developing a Node.js addon and multi-tenant web panel called Cloudash.
The document discusses HTML5 as a platform for user interfaces. It outlines several new features of HTML5, including the <canvas> element for drawing, WebGL for 3D graphics, multi-touch support, local storage with Web SQL databases, real-time updates with Web Sockets, improved file handling, and offline application caching. The document argues that HTML5 provides many of the capabilities of native applications and recommends using HTML5 and JavaScript for cross-platform user interface development.
ScalaCache is a facade library that provides a simple API for caching methods across various cache systems like Google Guava, Ehcache, Memcached, and Redis. It uses macros to generate cache keys and automatically cache method return values. This avoids issues with traditional approaches using the Java API or Spring which involve runtime overhead or restrictions. ScalaCache aims to improve features like asynchronous support, versioning, custom serialization, and browser caching integration.
Phone Home: A client-side error collection systemChris Birchall
This document summarizes Phone Home, a system to collect client-side errors from users' browsers. The Phone Home client runs JavaScript in users' browsers to collect errors and send them via HTTP POST requests to the Phone Home server. The server is built with Scalatra and saves the error data to MongoDB. It was created to debug unreproducible jQuery errors in IE browsers. Features include error handling, page load timing collection, custom field support, and an admin UI with stats and a recent events list. The server uses CORS to allow cross-domain requests from the Phone Home client. Data can also be analyzed using the ltsv4s library to parse and query the log files in Scala.
Libbitcoin is an open source C++ Bitcoin blockchain toolkit that includes several libraries for building blockchain applications and services. It includes libraries for the blockchain database (libbitcoin-blockchain), a server API (libbitcoin-server), a client wrapper for the API (libbitcoin-client), and a command line interface (libbitcoin-explorer). Libbitcoin aims to provide a complete third-party implementation of the Bitcoin protocol that is not controlled by any single entity.
The document discusses the C10K problem of handling 10,000 clients simultaneously on web servers and possible solutions like non-blocking, blocking, and asynchronous approaches. It then provides an overview of how Node.js uses an evented and asynchronous model with JavaScript to help solve the C10K problem by having a single-threaded event loop that handles I/O without blocking and allows for many connections.
The document provides an overview of Node.js, a JavaScript runtime environment for building scalable network applications. Some key points covered include:
- Node.js is built on Google's V8 JavaScript engine and is event-driven and non-blocking.
- It is well-suited for data-intensive real-time applications due to its lightweight and efficient nature.
- Node.js differs from other scripting languages by being non-blocking, single-threaded, and having an event-based approach built-in.
This slides are for meetup event from below link.
https://www.meetup.com/ja-JP/CodeChrysalis/events/245248864/
This mainly explains how backend program works in general and I implemented sample project with express and sequelizejs that are nodejs modules and PostgreSQL for a database. You can see sample project (learning material of backend with JavaScript) from below github link.
Repository for this slides:
https://github.com/duyoji/creating_api_with_express_and_postgresql
The document discusses MongoDB backup options including mongodump/mongorestore, storage-level backups, and the MongoDB Management Service (MMS) backup. MMS provides cloud-based, encrypted backups of MongoDB deployments with point-in-time recovery. It takes periodic snapshots of data and oplog to enable restores. Setup involves installing agents, registering with MMS, and an initial sync replicates data to MMS for backups.
OSMC 2018 | Stream connector: Easily sending events and/or metrics from the C...NETWAYS
Since Centreon 2.8.18, Centreon broker provides a new connector called “Stream connector”. With it, users have the possibility to create an output to any tool of their choice. The topic of this talk is to present this connector and its use through several examples.
The first JavaScript engine was created by Brendan Eich at Netscape, for the Netscape browser
It is a programming language used to make dynamic web pages and Server side apps(Node.js)
It gives logic to static HTML pages
We can Update DOM tree by javascript dynamically
OSMC 2018 | Visualization of your distributed infrastructure by Nicolai BuchwitzNETWAYS
In times of industrial IoT devices and cloud providers like AWS, which allow small and medium-sized companies to distribute their infrastructure around the world, it is becoming increasingly important to keep an overview. Here a few instances in Amsterdam, there a few in Tokyo and not to forget the satellites in Moscow. The Map Addon with its filters and dashboards helps to keep the overview in this constantly changing landscape and to recognize patterns and anomalies at an early stage.
This slide deck demonstrates the latest releases of Kubeless and Ballerina and shows how to develop and run Ballerina functions on Kubernetes with Kubeless.
Webinar: https://ballerina.io/learn/events/webinars/ballerina-serverless-with-kubeless/
This document discusses using BaseX, an XML database, for web applications. It describes GraphXQ, which uses RESTXQ and Graphviz to visualize graphs. It also describes CellarXQ, an Angular.js single page application that uses BaseX and OAuth for user authentication and data storage. Finally, it shows how to create a chatbot using BaseX, Node.js and Socket.io that passes messages to an XQuery script for processing.
This document discusses server-side event-driven programming using Node.js. It covers how Node.js uses an event loop and asynchronous non-blocking I/O to handle many connections concurrently with high performance. Common Node.js concepts are explained like first-class functions, callbacks, and event emitters. Node.js is compared to traditional threaded programming and shown to have advantages in scalability and efficiency. Example Node.js applications and APIs are provided.
This document provides an overview of Node.js, including its goals, features, and uses. Node.js is a server-side JavaScript platform designed for building scalable network applications. It uses a non-blocking I/O model and single-threaded event loop. Node.js is commonly used for real-time web applications due to its non-blocking architecture. The document also discusses Node.js modules, installation, basic HTTP servers, and blocking vs non-blocking code.
Node.js is a JavaScript runtime built on Chrome's V8 engine. It is used for building scalable network applications like web servers. It uses an event-driven, asynchronous I/O model that makes it lightweight and efficient, especially for real-time apps with many simultaneous connections. Node.js has a large ecosystem of open source modules and sees widespread use for building fast web servers and APIs.
This document discusses socket programming and network programming concepts like TCP and UDP. It provides examples of using Netcat and Python for sockets. It also summarizes the architecture of Nginx and Openresty, a framework that embeds Lua in Nginx allowing full web applications to run within the Nginx process for high performance and scalability. Openresty allows accessing and modifying requests and responses with Lua scripts.
You may have heard that Node.js as JavaScript for the server-side and you may be wondering why anyone would want that!. Or maybe you know exactly what Node.js is, but aren’t sure when or why to use it.
This month Coffee@DBG comes up with “Step into the Node JS Express” to answer all your questions on Node.JS. If you are enthusiastic to know more about it and why it’s making waves in the community, join it now before the seats get filled.
Coffee @ DBG is a Rendezvous of open interactive discussions in technology, where enthusiasts from different companies of Technopark have a get-together to discuss and share their knowledge over a cup of Coffee at DBG.
Coffee@DBG has been the most popular tech event in Technopark happening every month on first Wednesdays which will also provide a platform for programmers to get free consultation on problems they are facing in real work.
First ever talk about Node.JS in Kerala by its early adopters.
This document provides an overview of server-side JavaScript using Node.js in 3 sentences or less:
Node.js allows for the development of server-side applications using JavaScript and non-blocking I/O. It introduces some theory around event loops and asynchronous programming in JavaScript. The document includes examples of building HTTP and TCP servers in Node.js and connecting to MongoDB, as well as when Node.js may and may not be suitable.
This document discusses server-side event-driven programming and Node.js. It covers key concepts like asynchronous programming using callbacks and event loops. Node.js uses asynchronous and non-blocking I/O to minimize overhead and maximize scalability compared to traditional threaded models. Common Node.js applications include APIs, proxies, and simple data transformations.
"Node.js vs workers — A comparison of two JavaScript runtimes", James M SnellFwdays
Workers is the open source kernel of the Cloudflare Workers platform, and despite being built around v8, and running JavaScript and WebAssembly, it is quite different from Node.js. This talk will explore the differences and similarities and hopefully give you a bit more insight into how both operate.
An introduction to Netty. A powerful framework to develop networking applications.
This is suppose to be followed as hands on training, as the exercises on the slides imply, but can be also used an introduction guidance.
LF_OVS_17_OvS manipulation with Go at DigitalOceanLF_OpenvSwitch
The document discusses DigitalOcean's past and present use of Open vSwitch (OvS) for virtual networking. In the past, OvS was manipulated using Perl scripts that built flow strings and called ovs-ofctl. This had issues like lack of testing and non-atomic flow applications. Now, a Go package called ovs is used to programmatically control OvS. It builds flows without string manipulation and applies them atomically. DigitalOcean also uses packages like hvflow and gRPC services hvflowctl and hvflowd to configure OvS flows from network parameters. The future may involve orchestrating OvS directly through OpenFlow to avoid parsing tool outputs and directly applying flows.
Developing realtime apps with Drupal and NodeJS drupalcampest
Based on Google's V8 JavaScript engine, NodeJS is a fairly new platform for creating scalable and real-time web applications. I will introduce you to NodeJS internals and ecosystem as well as exaplain why and how you can use Node in your Drupal based projects.
Node.js is an asynchronous event-driven JavaScript runtime that allows JavaScript to be used on the server-side. It uses a non-blocking I/O model that makes it suitable for real-time web applications. WebSockets provide a standardized way for the browser and server to establish two-way communication. However, not all browsers support WebSockets yet. Socket.io addresses this by providing a WebSocket-like experience across all browsers through fallbacks like long-polling. It allows real-time applications to be developed more easily.
How to make a high-quality Node.js app, Nikita GalkinSigma Software
This document discusses how to build high quality Node.js applications. It covers attributes of quality like understandability, modifiability, portability, reliability, efficiency, usability, and testability. For each attribute, it provides examples of what could go wrong and best practices to achieve that attribute, such as using dependency injection for modifiability, environment variables for portability, and graceful shutdown for reliability. It also discusses Node.js programming paradigms like callbacks, promises, and async/await and recommends best practices for testing Node.js applications.
We will introduce Airflow, an Apache Project for scheduling and workflow orchestration. We will discuss use cases, applicability and how best to use Airflow, mainly in the context of building data engineering pipelines. We have been running Airflow in production for about 2 years, we will also go over some learnings, best practices and some tools we have built around it.
Speakers: Robert Sanders, Shekhar Vemuri
This document provides an overview of Netty, an asynchronous event-driven network application framework for Java. It discusses key Netty concepts like the event loop, channels, pipelines and handlers. It also provides examples of building an echo server and client with Netty. Additionally, it mentions several large companies that use Netty in production and open-source projects built with Netty. Finally, it discusses some alternative solutions to Netty like ServiceTalk, Armeria and Reactor Netty that provide additional features on top of the Netty core.
Into to Node.js: Building Fast, Scaleable Network ApplicationsFlatiron School
Node.js is an event-driven, non-blocking server-side JavaScript runtime built on Chrome's V8 engine. It allows highly scalable network applications to be built by wrapping non-blocking libraries. Node.js uses an event loop that listens for events like connections, requests, data, and closures and queues callbacks for handling them asynchronously without blocking the main thread. This document provides an overview of Node.js and some of its core modules like Express for building web servers and Socket.io for real-time communication. It also includes examples of using Node.js and these modules to build a collaborative drawing application.
Node.js is an asynchronous and event-driven JavaScript runtime built on Chrome's V8 JavaScript engine. It uses an event loop to handle asynchronous I/O in a non-blocking way without threads. The event loop listens for events like file system operations or network connections and queues microtasks or callbacks for execution when the events occur. A thread pool handles I/O-bound tasks like file system operations to improve performance. This single-threaded asynchronous model improves concurrency and scalability compared to traditional threaded models.
Similar to JS Fest 2019/Autumn. Виталий Кухар. Сравнение кластеризации HTTP, TCP и UDP на процессах и потоках в NodeJS (20)
JS Fest 2019/Autumn. Роман Савіцький. Webcomponents & lit-element in productionJSFestUA
В далекому 2016 році світ почув про вебкомпоненти, а одна ще тоді не дуже розумна команда, якій приходилось верстати дуже багато, вирішила спробувати те все в продукті, який би допоміг зменшити верстку. Про біди вебкомпонентів відомо всім, але про те, як вижити і дійти з альфи до стабільної версії знають не багато. Використання lit-element & lit-html і вирішення наболілих проблем, ось справня ціль моєї доповіді. Happy end обіцяю.
In this talk, attendees will see examples to improve their Javascript Performance making a few changes in their existent application. We will talk about Cache, Node.js common flow, and best practices. They'll see how to avoid performance problems working in Javascript loops, tips to work with Web APIs and best practices javascript applications.
JS Fest 2019/Autumn. Alexandre Gomes. Embrace the "react fatigue"JSFestUA
As a subset of the JS community, react has seen a lot of so-called ""good practices"" these last years, made out of libraries and design patterns. As if it wasn't hard enough to stay sane in a crazy JS world, we're now doing the same in react.
Together, let's explore how such abundance of new techniques can actually be embraced, without making you lose your mind !
JS Fest 2019/Autumn. Anton Cherednikov. Choreographic or orchestral architect...JSFestUA
When we developing a loosely coupled and reusable application, often arises the question: how to arrange to communicate between services or applications? To a large extent, it depends on the nature of the request and the granularity of your applications or services.
We will discuss the two classic microservice integration patterns: service choreography and orchestration.
What is the difference between these two modes of communication? Which one we should use? How to ensure data consistency? How to implement disturbed transactions?
We will discuss these issues, consider an example of implementing orchestration on nodejs, and of course we will not forget about logging, monitoring and alerting.
JS Fest 2019/Autumn. Adam Leos. So why do you need to know Algorithms and Dat...JSFestUA
During the presentation, we will consider what advantages a front-end developer will get from knowledge of algorithms and data structures.
We will analyze real-world examples where this knowledge simplified logic and accelerated applications dramatically.
And finally we will understand the most necessary things that will allow us to determine the effectiveness of the code and easily improve it.
JS Fest 2019/Autumn. Marko Letic. Saving the world with JavaScript: A Data Vi...JSFestUA
Did you know that the beginnings of data visualization are strongly tied to solving some of the biggest problems humanity has ever faced? Wouldn’t it be more interesting to say that you’re not a doctor, but you do save lives than to say you’re just a developer?
When talking about data visualization and JavaScript your mind usually goes to D3.js. But if our data has a location-based representation, we are faced with a limited choice. The main topic of this talk is to introduce the audience with deck.gl, an open-source WebGL-powered library developed by Uber that allows us to create beautiful data visualizations of large datasets and raise the level of interactivity for the user on a whole new level. We’ll see how our code can tell a story and how that story can potentially save lives. A short introduction to the library and it’s API will be demonstrated along with practical use-cases, live-code examples and it’s integration with popular frameworks such as Angular and React.
JS Fest 2019/Autumn. Александр Товмач. JAMstackJSFestUA
Вы уже слышали о JAMstack, который пришел на смену SSR и SPA? Подход, который оптимизирует веб приложения так, что они ограничены только скоростью вашего интернет соединения. Никаких просадок при рендере на клиенте, никаких падений серверов от нагрузки, только SEO-friendly приложения без проблем с масштабируемостью.
We'll go through the possible ways to bring technology agnostic microservice architecture to the frontend, review pros/cons of each of them. We also will check the "ultimate solution" that handles microservices with SSR in SPA manner.
This talk will be interesting for ones who have multiple teams working on the same frontend application.
JS Fest 2019/Autumn. Дмитрий Жарков. Blockchainize your SPA or Integrate Java...JSFestUA
Blockchain and decentralized applications are getting used more and more often. Many big enterprises like IBM, Walmart, Alibaba, FedX, British Airways, and others are already integrating blockchain into their ecosystems.
As most of the applications on the web, decentralized applications require a client to make interaction with them user-friendly. I would like to share how to connect/integrate JavaScript applications with decentralized, blockchain services. Take a look at what are the differences between decentralized and standard backends, what challenges and issues developers might meet.
JS Fest 2019/Autumn. Maciej Treder. Angular Schematics - Develop for developersJSFestUA
Say hello to the Angular CLI from new perspective. Get to know what schematics are and how you can use them for your purpose. Make use of ng add, ng update, ng new command and much more. Learn how to create read update and delete files automatically in your project, and how to execute npm tasks such as installing dependencies.
JS Fest 2019/Autumn. Kyle Boss. A Tinder Love Story: Create a Wordpress Blog ...JSFestUA
A woman shares her experience finding love through the dating app Tinder, matching with a man and going on dates that led to a relationship. She provides tips for using Tinder successfully, such as taking time to fill out a profile completely and thoughtfully choosing photos that accurately represent you. While online dating requires an investment of time and effort, it can result in meaningful connections when done with sincerity and an open mind.
JS Fest 2019/Autumn. Андрей Старовойт. Зачем нужен тип "true" в TypeScript?JSFestUA
Литеральные типы в TypeScript, которые появились несколько лет назад, на самом деле произвели мини-революцию в языке, которую многие не заметили. Сегодня сложно представить себе TypeScript без этих типов и механизмов, построеных поверх них: mapped, indexer, keyof types и многие другие. В докладе я расскажу, как и почему литеральные типы появились в TypeScript и какие концепции они привнесли в язык. Поговорим также о том, почему с точки зрения разработчика анализатора TypeScript литеральные типы — это по-настоящему сложная языковая фича. Ну и конечно коснемся вопроса, как это все согласуется с реальным миром, а именно с JavaScript.
JS Fest 2019/Autumn. Eyal Eizenberg. Tipping the ScaleJSFestUA
Times Square is the most visited place globally with about 380,000 pedestrian visitors a day - roughly the same amount of people which go to Wix’s dashboard. Building a page which receives such high traffic requires having great performance and intelligent architecture. In this talk, Eyal will go over the challenges of rebuilding Wix’s dashboard, the architecture and how we got it to load under 1 second.
JS Fest 2019/Autumn. Sota Ohara. Сreate own server less CMS from scratchJSFestUA
We created CMS using React, Google Cloud Storage and Google Cloud Functions from scratch.
I'd like to share the knowledge of how to build serverless CMS from scratch.
JS Fest 2019/Autumn. Джордж Евтушенко. Как стать программистом, которого хотятJSFestUA
Что имеется в виду, когда говорят: "С ним приятно работать"? Бывает и наоборот, когда говорят: "Она классный специалист, но работать с ней я бы не хотел". Приходите послушать как формируется отношение к человеку на основании его профессиональных качеств и сможете унести с собой список конкретных полезных советов на этот счет.
JS Fest 2019/Autumn. Алексей Орленко. Node.js N-API for RustJSFestUA
This document discusses using the N-API in Rust to build native Node.js addons. N-API allows addons to work across Node.js versions without recompiling. The document outlines plans to get started with N-API in Rust, generate bindings from C headers, build a type-safe Rust API, use macros to reduce boilerplate, perform parallel computations, and benchmark performance. Resources are provided for following along with the code examples.
JS Fest 2019/Autumn. Daniel Ostrovsky. Falling in love with decorators ES6/Ty...JSFestUA
Decorators are part of proposal TC39 (stage 2), this means that sooner or later decorators will become a part of the JS. However, there is no need to wait! We can use decorators in JavaScript (with babel) and in TypeScript. Let's see how decorators can extend the functionality of classes and methods in a clean and declarative fashion. And many other things which gives you more flexibility.
JS Fest 2019/Autumn. Андрей Андрийко. Гексагональна архітектура в Nodejs проектіJSFestUA
Ідея гексагональної архітектури полягає в тому, щоб відділити зовнішні взаємодії від бізнес логіки задопомогою так званих портів. Мета - ізолювати центральну логіку вашої програми від зовнішніх залежностей.
Під час виступу хочу поділитися досвідом розробки Nodejs додатку з використанням гексагональної архітектури. Обговоримо підводні камені, з якими можна стикнулися під час розробки, основні перевагами та недолікі архітектури. На прикладі розглянемо, як саме організувати архітектуру в Nodejs середовищі, а також стек технологій, що ми використовували, та підходи до тестування.
JS Fest 2019/Autumn. Борис Могила. Svelte. Почему нам не нужно run-time ядроJSFestUA
Использование различных фреймворков дает нам возможность писать быстрые приложения с минимальными затратами времени. Но за это наши пользователи платят продолжительностью первой загрузки и трафиком. Я расскажу как можно писать быстрые приложения с гораздо меньшим размером исходного кода с той же удобностью.
Это будет 6 живых демо взлома. Идея не обсудить сухую теория, а увидеть на практике, как не всегда очевидные ошибки являются источником серьезных уязвимостей в твоем JavScript приложении.
This document provides an overview of wound healing, its functions, stages, mechanisms, factors affecting it, and complications.
A wound is a break in the integrity of the skin or tissues, which may be associated with disruption of the structure and function.
Healing is the body’s response to injury in an attempt to restore normal structure and functions.
Healing can occur in two ways: Regeneration and Repair
There are 4 phases of wound healing: hemostasis, inflammation, proliferation, and remodeling. This document also describes the mechanism of wound healing. Factors that affect healing include infection, uncontrolled diabetes, poor nutrition, age, anemia, the presence of foreign bodies, etc.
Complications of wound healing like infection, hyperpigmentation of scar, contractures, and keloid formation.
Philippine Edukasyong Pantahanan at Pangkabuhayan (EPP) CurriculumMJDuyan
(𝐓𝐋𝐄 𝟏𝟎𝟎) (𝐋𝐞𝐬𝐬𝐨𝐧 𝟏)-𝐏𝐫𝐞𝐥𝐢𝐦𝐬
𝐃𝐢𝐬𝐜𝐮𝐬𝐬 𝐭𝐡𝐞 𝐄𝐏𝐏 𝐂𝐮𝐫𝐫𝐢𝐜𝐮𝐥𝐮𝐦 𝐢𝐧 𝐭𝐡𝐞 𝐏𝐡𝐢𝐥𝐢𝐩𝐩𝐢𝐧𝐞𝐬:
- Understand the goals and objectives of the Edukasyong Pantahanan at Pangkabuhayan (EPP) curriculum, recognizing its importance in fostering practical life skills and values among students. Students will also be able to identify the key components and subjects covered, such as agriculture, home economics, industrial arts, and information and communication technology.
𝐄𝐱𝐩𝐥𝐚𝐢𝐧 𝐭𝐡𝐞 𝐍𝐚𝐭𝐮𝐫𝐞 𝐚𝐧𝐝 𝐒𝐜𝐨𝐩𝐞 𝐨𝐟 𝐚𝐧 𝐄𝐧𝐭𝐫𝐞𝐩𝐫𝐞𝐧𝐞𝐮𝐫:
-Define entrepreneurship, distinguishing it from general business activities by emphasizing its focus on innovation, risk-taking, and value creation. Students will describe the characteristics and traits of successful entrepreneurs, including their roles and responsibilities, and discuss the broader economic and social impacts of entrepreneurial activities on both local and global scales.
How to Make a Field Mandatory in Odoo 17Celine George
In Odoo, making a field required can be done through both Python code and XML views. When you set the required attribute to True in Python code, it makes the field required across all views where it's used. Conversely, when you set the required attribute in XML views, it makes the field required only in the context of that particular view.
हिंदी वर्णमाला पीपीटी, hindi alphabet PPT presentation, hindi varnamala PPT, Hindi Varnamala pdf, हिंदी स्वर, हिंदी व्यंजन, sikhiye hindi varnmala, dr. mulla adam ali, hindi language and literature, hindi alphabet with drawing, hindi alphabet pdf, hindi varnamala for childrens, hindi language, hindi varnamala practice for kids, https://www.drmullaadamali.com
Chapter wise All Notes of First year Basic Civil Engineering.pptxDenish Jangid
Chapter wise All Notes of First year Basic Civil Engineering
Syllabus
Chapter-1
Introduction to objective, scope and outcome the subject
Chapter 2
Introduction: Scope and Specialization of Civil Engineering, Role of civil Engineer in Society, Impact of infrastructural development on economy of country.
Chapter 3
Surveying: Object Principles & Types of Surveying; Site Plans, Plans & Maps; Scales & Unit of different Measurements.
Linear Measurements: Instruments used. Linear Measurement by Tape, Ranging out Survey Lines and overcoming Obstructions; Measurements on sloping ground; Tape corrections, conventional symbols. Angular Measurements: Instruments used; Introduction to Compass Surveying, Bearings and Longitude & Latitude of a Line, Introduction to total station.
Levelling: Instrument used Object of levelling, Methods of levelling in brief, and Contour maps.
Chapter 4
Buildings: Selection of site for Buildings, Layout of Building Plan, Types of buildings, Plinth area, carpet area, floor space index, Introduction to building byelaws, concept of sun light & ventilation. Components of Buildings & their functions, Basic concept of R.C.C., Introduction to types of foundation
Chapter 5
Transportation: Introduction to Transportation Engineering; Traffic and Road Safety: Types and Characteristics of Various Modes of Transportation; Various Road Traffic Signs, Causes of Accidents and Road Safety Measures.
Chapter 6
Environmental Engineering: Environmental Pollution, Environmental Acts and Regulations, Functional Concepts of Ecology, Basics of Species, Biodiversity, Ecosystem, Hydrological Cycle; Chemical Cycles: Carbon, Nitrogen & Phosphorus; Energy Flow in Ecosystems.
Water Pollution: Water Quality standards, Introduction to Treatment & Disposal of Waste Water. Reuse and Saving of Water, Rain Water Harvesting. Solid Waste Management: Classification of Solid Waste, Collection, Transportation and Disposal of Solid. Recycling of Solid Waste: Energy Recovery, Sanitary Landfill, On-Site Sanitation. Air & Noise Pollution: Primary and Secondary air pollutants, Harmful effects of Air Pollution, Control of Air Pollution. . Noise Pollution Harmful Effects of noise pollution, control of noise pollution, Global warming & Climate Change, Ozone depletion, Greenhouse effect
Text Books:
1. Palancharmy, Basic Civil Engineering, McGraw Hill publishers.
2. Satheesh Gopi, Basic Civil Engineering, Pearson Publishers.
3. Ketki Rangwala Dalal, Essentials of Civil Engineering, Charotar Publishing House.
4. BCP, Surveying volume 1
JS Fest 2019/Autumn. Виталий Кухар. Сравнение кластеризации HTTP, TCP и UDP на процессах и потоках в NodeJS
1. Comparing Node.js
processes and threads
for clustering
HTTP, TCP, and UDP
Vitalii Kukhar
Full Stack Software Engineer at Metarhia
8-9 NOVEMBER ‘19 KIEV, UKRAINEPROFESSIONAL JS CONFERENCE
3. Asynchronous I/O
● Rack: a Ruby Webserver Interface
● NGINX uses an asynchronous, event-driven approach
● an asynchronous event-driven JavaScript runtime
● JavaScript + asynchronous IO + HTTP server stuff
4. Performing CPU-intensive operations
● long-running JavaScript functions
● unresponsive page
● limit to perform new asynchronous I / O tasks
● bad user experience
5. Inter process communication (IPC)
● child_process module
● cluster module
● net module (tcp client-server)
● BroadcastChannel API, Web Storage API, etc.
● no shared memory
6. The worker_threads module
● enables to use threads
● execute JavaScript in parallel
● useful for performing CPU-intensive operations
● shared memory
8. What the worker_threads module gave us(before)?
● one process
● one thread
● one event loop
● one JS Engine instance
● one NodeJS instance process
thread
V8 libuv
NodeJS
JavaScript
9. What the worker_threads module gave us(after)?
● one process
● multiple threads
● one event loop per thread
● one JS Engine Instance per thread
● one NodeJS Instance per thread process
thread
V8 libuv
NodeJS
JavaScript
thread
V8 libuv
NodeJS
JavaScript