ReactJS for Beginners provides an overview of ReactJS including what it is, advantages, disadvantages, typical setup tools, and examples of basic React code. Key points covered include:
- ReactJS is a JavaScript library for building user interfaces and is component-based.
- Advantages include high efficiency, easier JavaScript via JSX, good developer tools and SEO, and easy testing.
- Disadvantages include React only handling the view layer and requiring other libraries for full MVC functionality.
- Examples demonstrate basic components, properties, events, conditional rendering, and lists in ReactJS.
Introduction to React in combination with Redux. Redux helps you to develop applications in a simple way while having features like time-travel available during development.
Tutorial Videos: https://www.youtube.com/playlist?list=PLD8nQCAhR3tQ7KXnvIk_v_SLK-Fb2y_k_
Day 1 : Introduction to React, Babel and Webpack
Prerequisites of starting the workshop ( Basic understanding of Node & Express )
What is Virtual DOM?
What is React and why should we use it?
Install and set up React:
a-Using create-react-app
b-From scratch using Babel and Webpack. We will use Webpack Dev Server.
Day 2 : React Basic Concepts
Types of Components: Class-based and Functional based Components
Use of JSX
Parent, Child, and Nested Components
Difference between State and Props
Create and Handle Routes
Component Lifecycle Methods
Create a form and handling form inputs
Use of arrow functions and Spread Operator
Day 3: Advanced Concepts in React
Use of Refs
What are Higher Order Components( HOC )?
How to use HOC
Understanding Context in React
Explanation of the fundamentals of Redux with additional tips and good practices. Presented in the Munich React Native Meetup, so the sample code is using React Native. Additional code: https://github.com/nacmartin/ReduxIntro
Introduction to React in combination with Redux. Redux helps you to develop applications in a simple way while having features like time-travel available during development.
Tutorial Videos: https://www.youtube.com/playlist?list=PLD8nQCAhR3tQ7KXnvIk_v_SLK-Fb2y_k_
Day 1 : Introduction to React, Babel and Webpack
Prerequisites of starting the workshop ( Basic understanding of Node & Express )
What is Virtual DOM?
What is React and why should we use it?
Install and set up React:
a-Using create-react-app
b-From scratch using Babel and Webpack. We will use Webpack Dev Server.
Day 2 : React Basic Concepts
Types of Components: Class-based and Functional based Components
Use of JSX
Parent, Child, and Nested Components
Difference between State and Props
Create and Handle Routes
Component Lifecycle Methods
Create a form and handling form inputs
Use of arrow functions and Spread Operator
Day 3: Advanced Concepts in React
Use of Refs
What are Higher Order Components( HOC )?
How to use HOC
Understanding Context in React
Explanation of the fundamentals of Redux with additional tips and good practices. Presented in the Munich React Native Meetup, so the sample code is using React Native. Additional code: https://github.com/nacmartin/ReduxIntro
React (or React Js) is a declarative, component-based JS library to build SPA(single page applications) which was created by Jordan Walke, a software engineer at Facebook. It is flexible and can be used in a variety of projects.
All Things Open 2014 - Day 2
Thursday, October 23rd, 2014
James Pearce
Head of Open Source with Facebook
Front Dev 1
An Introduction to ReactJS
Find more by James here: https://speakerdeck.com/jamesgpearce
Plain React detects changes by re-rendering your whole UI into a virtual DOM and then comparing it to the old version. Whatever changed, gets patched to the real DOM.
Getting started with the reactjs, basics of reactjs, introduction of reactjs, core concepts of reactjs and comparison with the other libraries/frameworks
ReactJS is arguably the most popular Javascript framework around for web development today. With more and more teams exploring and adopting React, here is TechTalks presentation elaborating fundamentals of React, in a code along session
Tech talk about scalable architectures with React and Redux.
We take a walk on problems that React proposes to solve and in which situations the Redux is indicated.
We dive deep into patterns of organization and structuring of projects React and Redux focusing on scalability and maintainability.
In this presentation, we'll explore React’s “Component” based world. We'll go through Virtual DOM, how it works, and React's Virtual DOM vs. the real DOM.
Come see how easy it is to build fast, accurate, and responsive web UIs using the React library. Even if you’ve never written Javascript before, React’s straightforward syntax can get you started with your UI project quickly. In this session, you’ll learn about React’s declarative syntax and state representation, explore some of the basic components that are used to build sophisticated UIs, and leave with a foundational application you can continue to build on.
React (or React Js) is a declarative, component-based JS library to build SPA(single page applications) which was created by Jordan Walke, a software engineer at Facebook. It is flexible and can be used in a variety of projects.
All Things Open 2014 - Day 2
Thursday, October 23rd, 2014
James Pearce
Head of Open Source with Facebook
Front Dev 1
An Introduction to ReactJS
Find more by James here: https://speakerdeck.com/jamesgpearce
Plain React detects changes by re-rendering your whole UI into a virtual DOM and then comparing it to the old version. Whatever changed, gets patched to the real DOM.
Getting started with the reactjs, basics of reactjs, introduction of reactjs, core concepts of reactjs and comparison with the other libraries/frameworks
ReactJS is arguably the most popular Javascript framework around for web development today. With more and more teams exploring and adopting React, here is TechTalks presentation elaborating fundamentals of React, in a code along session
Tech talk about scalable architectures with React and Redux.
We take a walk on problems that React proposes to solve and in which situations the Redux is indicated.
We dive deep into patterns of organization and structuring of projects React and Redux focusing on scalability and maintainability.
In this presentation, we'll explore React’s “Component” based world. We'll go through Virtual DOM, how it works, and React's Virtual DOM vs. the real DOM.
Come see how easy it is to build fast, accurate, and responsive web UIs using the React library. Even if you’ve never written Javascript before, React’s straightforward syntax can get you started with your UI project quickly. In this session, you’ll learn about React’s declarative syntax and state representation, explore some of the basic components that are used to build sophisticated UIs, and leave with a foundational application you can continue to build on.
On May 14, 2015, Jeff Winkler gave a talk at Harvard University's Lamont Library titled "Intro to ReactJS."
Description
Created by Facebook and Instagram, React has recently been embraced by companies and organizations including Airbnb, Khan Academy, Reddit, the BBC, and Code Academy. This presentation will be especially interesting for those using or planning to use javascript libraries such as angularJS, backbone.js, ember.js, and others.
For this talk, Jeff Winkler will present:
- An introduction to React, mixed with demos.
- An examination of how React implements Computer Science principles from Functional and Object-Oriented. The discussion will consider the impact on maintainable large-scale systems.
Biography
Jeff Winkler, is a professional developer* in the Boston area and organizer of the Boston ReactJS Meetup. In addition to the ReactJS Boston Meetup, Jeff works with React professionally at TapJoy and runs http://react.rocks.
(* Full-stack guy. ReactJS, Rails, TDD. Best OODA loop wins)
I've been working a lot with React lately and thought it would be a good idea to share what I've learned with the group.
During this talk we'll take a look at Facebook's React library while drawing comparisons to frameworks like Angular. We'll see how we can use React and friends to create a fast and efficient single page app. Attendees are expected to have some familiarity with ES6/ES7 since we the codebase we will be looking at leverages features from the spec.
What we'll be taking a look at:
• React
• React Router
• Redux
• Redux Sagas
• Webpack
• Babel
React is a different way to write JavaScript apps. When it was introduced at JSConf US in May, the audience was shocked by some of its design principles. One sarcastic tweet from an audience member ended up describing React’s philosophy quite accurately: https://twitter.com/cowboy/status/339858717451362304
We’re trying to push the limits of what’s possible on the web with React. My talk will start with a brief introduction to the framework, and then dive into three controversial topics: Throwing out the notion of templates and building views with JavaScript, “re-rendering” your entire application when your data changes, and a lightweight implementation of the DOM and events.
Integrating React.js Into a PHP ApplicationAndrew Rota
React.js has taken the web development world by storm, and for good reason: React offers a declarative, component-oriented approach to building highly-scalable web UIs. But how can we take advantage of a JavaScript library like React in our server-side PHP applications. In this talk l cover the different ways React.js can be integrated into an existing PHP web application: from a client-side only approach to multiple techniques that support full server-side rendering with a Node.js server or PHP’s v8js. I also discuss the trade-offs in each of these designs and the challenges involved with adding React to a PHP site. Most importantly, I consider the higher-level issue of how to improve view cohesion across the client-server divide in a PHP application.
React is a JavaScript library for building user interfaces. It is maintained by Facebook and a community of individual developers and companies. React can be used as a base in the development of single-page or mobile application
Overview of The Scala Based Lift Web FrameworkIndicThreads
All of us having experience with other web frameworks such as Struts,Tapestry, Rails, etc would ask “Why another framework? Does Lift really solve problems any differently or more effectively than the ones we’ve used before? The Lift Web Framework provides an advanced set of tools for quickly and easily building real-time, multi-users, interactive web applications. Lift has a unique advantage that no other web framework currently shares: the Scala programming language. Scala is a relatively new language developed by Martin Odersky and his group at EPFL Switzerland. Scala is a hybrid Object Oriented and Functional language that runs at native speeds on the JVM and fully interoperates with Java code. Lift is a hybrid web framework built on Scala. Lift derives its features and idioms from the best of existing web frameworks as well as the functional and OO features in Scala. It compiles to Java bytecode and runs on the JVM, which means that we can leverage the vast ecosystem of Java libraries just as we would with any other java web framework. This presentation details the advantages of this Scala based Web framework over all the existing frameworks that we have used uptil now and shows a small sample application built with Lift. We will create a basic application with a model that maps to RDBMS, web pages that correspond to back end logic and bind dynamically created content to elements on the webpage.
Technologies are ever changing and since we're building our applications on the shoulders of giants like Babel,... We have to stay up-to-date with the newest trends.
We at Codifly strongly believe in using the newest technologies, that's why we've organised a meetup to showcase these for you. This event was organised in collaboration with ITLab HoGent at Campus Schoonmeersen (Voskenslaan 270, 9000 Ghent).
A certain level of knowledge about these subjects is required since we're mostly be going over the recent changes. For Babel we're discussing what's new in their upcoming version 7, for Webpack the changes from 3 -> 4.6 will be discussed and for React all the new features in React 16.3 and the upcoming ones.
A library for building user interfaces
Designed for View layer
Created by Facebook/Instagram developers
Build reusable & Interactive UI components
Renders your UI and respond to events
We will know the real purpose of the React and see how it can help us build componentized interfaces besides understanding the core concepts of core: Virtual DOM, JSX, Components (props, states, lifecycle) and Unidirectional Data Flow.
Adding a modern twist to legacy web applicationsJeff Durta
Avoid misery of working with legacy code
We will see how you can add independent and isolated components to existing pages; pages that may be difficult to change
React and Flux allow you to make self-contained additions that handle their own data access/persistence
This session for beginners introduces tf.data APIs for creating data pipelines by combining various "lazy operators" in tf.data, such as filter(), map(), batch(), zip(), flatmap(), take(), and so forth.
Familiarity with method chaining and TF2 is helpful (but not required). If you are comfortable with FRP, the code samples in this session will be very familiar to you.
A fast-paced introduction to TensorFlow 2 regarding some important new features (such as generators and the @tf.function decorator), along with tf.data code samples and lazy operators. We'll also delve into the key ideas underlying CNNs, RNNs, and LSTMs, followed by some Keras-based code blocks.
A fast-paced introduction to Deep Learning concepts, such as activation functions, cost functions, back propagation, and then a quick dive into CNNs. Basic knowledge of vectors, matrices, and derivatives is helpful in order to derive the maximum benefit from this session.
A fast-paced introduction to TensorFlow 2 about some important new features (such as generators and the @tf.function decorator) and TF 1.x functionality that's been removed from TF 2 (yes, tf.Session() has retired).
Some concise code samples are presented to illustrate how to use new features of TensorFlow 2.
A fast-paced introduction to TensorFlow 2 about some important new features (such as generators and the @tf.function decorator) and TF 1.x functionality that's been removed from TF 2 (yes, tf.Session() has retired).
Concise code samples are presented to illustrate how to use new features of TensorFlow 2. You'll also get a quick introduction to lazy operators (if you know FRP this will be super easy), along with a code comparison between TF 1.x/iterators with tf.data.Dataset and TF 2/generators with tf.data.Dataset.
Finally, we'll look at some tf.keras code samples that are based on TensorFlow 2. Although familiarity with TF 1.x is helpful, newcomers with an avid interest in learning about TensorFlow 2 can benefit from this session.
This fast-paced session provides a brief history of AI, followed by AI-related topics, such as Machine Learning, Deep Learning and Reinforcement Learning, and the most popular frameworks for Machine Learning. You will learn about some of the successes of AI, and also some of the significant challenges in AI. No specialized knowledge is required, but an avid interest is recommended to derive the maximum benefit from this session.
A fast-paced introduction to Deep Learning concepts, such as activation functions, cost functions, back propagation, and then a quick dive into CNNs, followed by a Keras code sample for defining a CNN. Basic knowledge of vectors, matrices, and derivatives is helpful in order to derive the maximum benefit from this session. Then we'll see a short introduction to TensorFlow 1.x and some insights into TF 2 that will be released some time this year.
Introduction to Deep Learning, Keras, and TensorflowOswald Campesato
A fast-paced introduction to Deep Learning concepts, such as activation functions, cost functions, back propagation, and then a quick dive into CNNs. Basic knowledge of vectors, matrices, and derivatives is helpful in order to derive the maximum benefit from this session. Then we'll see how to create a Convolutional Neural Network in Keras, followed by a quick introduction to TensorFlow and TensorBoard.
Introduction to Deep Learning for Non-ProgrammersOswald Campesato
This session provides a brief history of AI, followed by AI-related topics, such as robots in AI, Machine Learning and Deep Learning, use cases for AI, some of the successes of AI, and also some of the significant challenges in AI. You will also learn about AI and mobile devices and the ethics of AI. An avid interest is recommended to derive the maximum benefit from this session.
A fast-paced introduction to Deep Learning concepts, such as activation functions, cost functions, back propagation, followed by some TensorFlow features, and then a code sample of training a CNN in tensorflow.js. Basic knowledge of vectors, matrices, and derivatives is helpful in order to derive the maximum benefit from this session.
A fast-paced introduction to Deep Learning concepts, such as activation functions, cost functions, back propagation, followed by some TensorFlow features, and then a code sample of training a CNN in tensorflow.js. Basic knowledge of vectors, matrices, and derivatives is helpful in order to derive the maximum benefit from this session.
A fast-paced introduction to Deep Learning concepts, such as activation functions, cost functions, back propagation, and then a quick dive into CNNs. Basic knowledge of vectors, matrices, and derivatives is helpful in order to derive the maximum benefit from this session. Then we'll see a short introduction to TensorFlow and TensorBoard.
A fast-paced introduction to Deep Learning (DL) concepts, starting with a simple yet complete neural network (no frameworks), followed by aspects of deep neural networks, such as back propagation, activation functions, CNNs, and the AUT theorem. Next, a quick introduction to TensorFlow and TensorBoard, along with some code samples with TensorFlow. For best results, familiarity with basic vectors and matrices, inner (aka "dot") products of vectors, the notion of a derivative, and rudimentary Python is recommended.
Intro to Deep Learning, TensorFlow, and tensorflow.jsOswald Campesato
This fast-paced session introduces Deep Learning concepts, such gradient descent, back propagation, activation functions, and CNNs. We'll look at creating Android apps with TensorFlow Lite (pending its availability). Basic knowledge of vectors, matrices, and Android, as well as elementary calculus (derivatives), are strongly recommended in order to derive the maximum benefit from this session.
This slide deck introduces Deep Learning concepts, such gradient descent, back propagation, activation functions, and CNNs. Basic knowledge of vectors, matrices, and Android, as well as elementary calculus (derivatives), are strongly recommended in order to derive the maximum benefit from this session.
A fast-paced introduction to Deep Learning concepts, such as activation functions, cost functions, backpropagation, and then a quick dive into CNNs. Basic knowledge of vectors, matrices, and elementary calculus (derivatives), are helpful in order to derive the maximum benefit from this session.
Next we'll see a simple neural network using Keras, followed by an introduction to TensorFlow and TensorBoard. (Bonus points if you know Zorn's Lemma, the Well-Ordering Theorem, and the Axiom of Choice.)
This fast-paced session starts with an introduction to neural networks and linear regression models, along with a quick view of TensorFlow, followed by some Scala APIs for TensorFlow. You'll also see a simple dockerized image of Scala and TensorFlow code and how to execute the code in that image from the command line. No prior knowledge of NNs, Keras, or TensorFlow is required (but you must be comfortable with Scala).
"A fast-paced introduction to Deep Learning (DL) concepts, such as neural networks, back propagation, activation functions, and CNNs. We'll also look at JavaScript-based toolkits (such as TensorFire and deeplearning.js) that leverage the power of WebGL. Basic knowledge of elementary calculus (e.g., derivatives) is recommended in order to derive the maximum benefit from this session.
A fast-paced introduction to Deep Learning that starts with a simple yet complete neural network (no frameworks), followed by an overview of activation functions, cost functions, backpropagation, and then a quick dive into CNNs. Next we'll create a neural network using Keras, followed by an introduction to TensorFlow and TensorBoard. For best results, familiarity with basic vectors and matrices, inner (aka "dot") products of vectors, and rudimentary Python is definitely helpful.
A fast-paced introduction to Deep Learning (DL) concepts, such as neural networks, back propagation, activation functions, CNNs, RNNs (if time permits), and the CLT/AUT/fixed-point theorems, along with a basic code sample in TensorFlow.
During this session you will learn how to manually create a basic neural network that acts as a classifier, and also the segue from linear regression to a neural network.
You'll also learn about GANs (Generative Adversarial Networks) for static images as well as voice, and the former case, their potential impact on self-driving cars.
Field Employee Tracking System| MiTrack App| Best Employee Tracking Solution|...informapgpstrackings
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A Comprehensive Look at Generative AI in Retail App Testing.pdfkalichargn70th171
Traditional software testing methods are being challenged in retail, where customer expectations and technological advancements continually shape the landscape. Enter generative AI—a transformative subset of artificial intelligence technologies poised to revolutionize software testing.
Multiple Your Crypto Portfolio with the Innovative Features of Advanced Crypt...Hivelance Technology
Cryptocurrency trading bots are computer programs designed to automate buying, selling, and managing cryptocurrency transactions. These bots utilize advanced algorithms and machine learning techniques to analyze market data, identify trading opportunities, and execute trades on behalf of their users. By automating the decision-making process, crypto trading bots can react to market changes faster than human traders
Hivelance, a leading provider of cryptocurrency trading bot development services, stands out as the premier choice for crypto traders and developers. Hivelance boasts a team of seasoned cryptocurrency experts and software engineers who deeply understand the crypto market and the latest trends in automated trading, Hivelance leverages the latest technologies and tools in the industry, including advanced AI and machine learning algorithms, to create highly efficient and adaptable crypto trading bots
We describe the deployment and use of Globus Compute for remote computation. This content is aimed at researchers who wish to compute on remote resources using a unified programming interface, as well as system administrators who will deploy and operate Globus Compute services on their research computing infrastructure.
Climate Science Flows: Enabling Petabyte-Scale Climate Analysis with the Eart...Globus
The Earth System Grid Federation (ESGF) is a global network of data servers that archives and distributes the planet’s largest collection of Earth system model output for thousands of climate and environmental scientists worldwide. Many of these petabyte-scale data archives are located in proximity to large high-performance computing (HPC) or cloud computing resources, but the primary workflow for data users consists of transferring data, and applying computations on a different system. As a part of the ESGF 2.0 US project (funded by the United States Department of Energy Office of Science), we developed pre-defined data workflows, which can be run on-demand, capable of applying many data reduction and data analysis to the large ESGF data archives, transferring only the resultant analysis (ex. visualizations, smaller data files). In this talk, we will showcase a few of these workflows, highlighting how Globus Flows can be used for petabyte-scale climate analysis.
In software engineering, the right architecture is essential for robust, scalable platforms. Wix has undergone a pivotal shift from event sourcing to a CRUD-based model for its microservices. This talk will chart the course of this pivotal journey.
Event sourcing, which records state changes as immutable events, provided robust auditing and "time travel" debugging for Wix Stores' microservices. Despite its benefits, the complexity it introduced in state management slowed development. Wix responded by adopting a simpler, unified CRUD model. This talk will explore the challenges of event sourcing and the advantages of Wix's new "CRUD on steroids" approach, which streamlines API integration and domain event management while preserving data integrity and system resilience.
Participants will gain valuable insights into Wix's strategies for ensuring atomicity in database updates and event production, as well as caching, materialization, and performance optimization techniques within a distributed system.
Join us to discover how Wix has mastered the art of balancing simplicity and extensibility, and learn how the re-adoption of the modest CRUD has turbocharged their development velocity, resilience, and scalability in a high-growth environment.
First Steps with Globus Compute Multi-User EndpointsGlobus
In this presentation we will share our experiences around getting started with the Globus Compute multi-user endpoint. Working with the Pharmacology group at the University of Auckland, we have previously written an application using Globus Compute that can offload computationally expensive steps in the researcher's workflows, which they wish to manage from their familiar Windows environments, onto the NeSI (New Zealand eScience Infrastructure) cluster. Some of the challenges we have encountered were that each researcher had to set up and manage their own single-user globus compute endpoint and that the workloads had varying resource requirements (CPUs, memory and wall time) between different runs. We hope that the multi-user endpoint will help to address these challenges and share an update on our progress here.
Modern design is crucial in today's digital environment, and this is especially true for SharePoint intranets. The design of these digital hubs is critical to user engagement and productivity enhancement. They are the cornerstone of internal collaboration and interaction within enterprises.
Innovating Inference - Remote Triggering of Large Language Models on HPC Clus...Globus
Large Language Models (LLMs) are currently the center of attention in the tech world, particularly for their potential to advance research. In this presentation, we'll explore a straightforward and effective method for quickly initiating inference runs on supercomputers using the vLLM tool with Globus Compute, specifically on the Polaris system at ALCF. We'll begin by briefly discussing the popularity and applications of LLMs in various fields. Following this, we will introduce the vLLM tool, and explain how it integrates with Globus Compute to efficiently manage LLM operations on Polaris. Attendees will learn the practical aspects of setting up and remotely triggering LLMs from local machines, focusing on ease of use and efficiency. This talk is ideal for researchers and practitioners looking to leverage the power of LLMs in their work, offering a clear guide to harnessing supercomputing resources for quick and effective LLM inference.
How to Position Your Globus Data Portal for Success Ten Good PracticesGlobus
Science gateways allow science and engineering communities to access shared data, software, computing services, and instruments. Science gateways have gained a lot of traction in the last twenty years, as evidenced by projects such as the Science Gateways Community Institute (SGCI) and the Center of Excellence on Science Gateways (SGX3) in the US, The Australian Research Data Commons (ARDC) and its platforms in Australia, and the projects around Virtual Research Environments in Europe. A few mature frameworks have evolved with their different strengths and foci and have been taken up by a larger community such as the Globus Data Portal, Hubzero, Tapis, and Galaxy. However, even when gateways are built on successful frameworks, they continue to face the challenges of ongoing maintenance costs and how to meet the ever-expanding needs of the community they serve with enhanced features. It is not uncommon that gateways with compelling use cases are nonetheless unable to get past the prototype phase and become a full production service, or if they do, they don't survive more than a couple of years. While there is no guaranteed pathway to success, it seems likely that for any gateway there is a need for a strong community and/or solid funding streams to create and sustain its success. With over twenty years of examples to draw from, this presentation goes into detail for ten factors common to successful and enduring gateways that effectively serve as best practices for any new or developing gateway.
Experience our free, in-depth three-part Tendenci Platform Corporate Membership Management workshop series! In Session 1 on May 14th, 2024, we began with an Introduction and Setup, mastering the configuration of your Corporate Membership Module settings to establish membership types, applications, and more. Then, on May 16th, 2024, in Session 2, we focused on binding individual members to a Corporate Membership and Corporate Reps, teaching you how to add individual members and assign Corporate Representatives to manage dues, renewals, and associated members. Finally, on May 28th, 2024, in Session 3, we covered questions and concerns, addressing any queries or issues you may have.
For more Tendenci AMS events, check out www.tendenci.com/events
Prosigns: Transforming Business with Tailored Technology SolutionsProsigns
Unlocking Business Potential: Tailored Technology Solutions by Prosigns
Discover how Prosigns, a leading technology solutions provider, partners with businesses to drive innovation and success. Our presentation showcases our comprehensive range of services, including custom software development, web and mobile app development, AI & ML solutions, blockchain integration, DevOps services, and Microsoft Dynamics 365 support.
Custom Software Development: Prosigns specializes in creating bespoke software solutions that cater to your unique business needs. Our team of experts works closely with you to understand your requirements and deliver tailor-made software that enhances efficiency and drives growth.
Web and Mobile App Development: From responsive websites to intuitive mobile applications, Prosigns develops cutting-edge solutions that engage users and deliver seamless experiences across devices.
AI & ML Solutions: Harnessing the power of Artificial Intelligence and Machine Learning, Prosigns provides smart solutions that automate processes, provide valuable insights, and drive informed decision-making.
Blockchain Integration: Prosigns offers comprehensive blockchain solutions, including development, integration, and consulting services, enabling businesses to leverage blockchain technology for enhanced security, transparency, and efficiency.
DevOps Services: Prosigns' DevOps services streamline development and operations processes, ensuring faster and more reliable software delivery through automation and continuous integration.
Microsoft Dynamics 365 Support: Prosigns provides comprehensive support and maintenance services for Microsoft Dynamics 365, ensuring your system is always up-to-date, secure, and running smoothly.
Learn how our collaborative approach and dedication to excellence help businesses achieve their goals and stay ahead in today's digital landscape. From concept to deployment, Prosigns is your trusted partner for transforming ideas into reality and unlocking the full potential of your business.
Join us on a journey of innovation and growth. Let's partner for success with Prosigns.
TROUBLESHOOTING 9 TYPES OF OUTOFMEMORYERRORTier1 app
Even though at surface level ‘java.lang.OutOfMemoryError’ appears as one single error; underlyingly there are 9 types of OutOfMemoryError. Each type of OutOfMemoryError has different causes, diagnosis approaches and solutions. This session equips you with the knowledge, tools, and techniques needed to troubleshoot and conquer OutOfMemoryError in all its forms, ensuring smoother, more efficient Java applications.
Enhancing Research Orchestration Capabilities at ORNL.pdfGlobus
Cross-facility research orchestration comes with ever-changing constraints regarding the availability and suitability of various compute and data resources. In short, a flexible data and processing fabric is needed to enable the dynamic redirection of data and compute tasks throughout the lifecycle of an experiment. In this talk, we illustrate how we easily leveraged Globus services to instrument the ACE research testbed at the Oak Ridge Leadership Computing Facility with flexible data and task orchestration capabilities.
Exploring Innovations in Data Repository Solutions - Insights from the U.S. G...Globus
The U.S. Geological Survey (USGS) has made substantial investments in meeting evolving scientific, technical, and policy driven demands on storing, managing, and delivering data. As these demands continue to grow in complexity and scale, the USGS must continue to explore innovative solutions to improve its management, curation, sharing, delivering, and preservation approaches for large-scale research data. Supporting these needs, the USGS has partnered with the University of Chicago-Globus to research and develop advanced repository components and workflows leveraging its current investment in Globus. The primary outcome of this partnership includes the development of a prototype enterprise repository, driven by USGS Data Release requirements, through exploration and implementation of the entire suite of the Globus platform offerings, including Globus Flow, Globus Auth, Globus Transfer, and Globus Search. This presentation will provide insights into this research partnership, introduce the unique requirements and challenges being addressed and provide relevant project progress.
Advanced Flow Concepts Every Developer Should KnowPeter Caitens
Tim Combridge from Sensible Giraffe and Salesforce Ben presents some important tips that all developers should know when dealing with Flows in Salesforce.
In 2015, I used to write extensions for Joomla, WordPress, phpBB3, etc and I ...Juraj Vysvader
In 2015, I used to write extensions for Joomla, WordPress, phpBB3, etc and I didn't get rich from it but it did have 63K downloads (powered possible tens of thousands of websites).
2. What is ReactJS?
• Library for Web Apps (from Facebook)
• Provides the “V” in “MVC”
• component-based architecture
• ES6/JSX (HTML embedded in JavaScript)
• 400 components available:
https://github.com/brillout/awesome-react-components
3. Advantages of ReactJS
• highly efficient
• easier to write Javascript via JSX
• out-of-the-box developer tools
• very good for SEO
• easy to write UI test cases
• http://www.pro-tekconsulting.com/blog/advantages-
disadvantages-of-react-js/
4. Disadvantages of ReactJS
• ReactJS is only a view layer
• ReactJS into an MVC framework requires configuration
• learning curve for beginners who are new to web
development
• Scaffolding is usually needed for transpilation
5. What are Transpilers?
• They convert code from one language to another
• Babel (formerly 6to5):
+converts ES6 (some ES7) to ECMA5
+ appears to be the de facto standard
• Traceur (Google):
+ converts ES6 to ECMA5
+ used by Angular 2
NOTE: JSX is transpiled by ECMA5
6. Typical Set-up Tools
• Node and npm (installing JS dependencies)
• Babel (in HTML Web pages)
• Webpack (highly recommended)
• NB: you can use Gulp instead of WebPack
• https://www.eventbrite.com/e/react-js-foundation-
hands-on-workshop-tickets-27743432353
7. React App (MyWebPage.html)
<!– The core React library -->
<script src="https://fb.me/react-15.0.0-rc.2.js"></script>
<!– The ReactDOM Library -->
<script src="https://fb.me/react-dom-15.0.0-rc.2.js">
</script>
<!– For transpiling ES6 code into ES5 code -->
<script src="https://cdnjs.cloudflare.com/ajax/libs/babel-
core/5.8.23/browser.min.js">
</script>
10. The render() Method in ReactJS
• Contains one top-level “root” element
• a <div> is often the top-level element
• render() is invoked when a state change occurs
• NB: a <View> is the top-level element in React Native
11. Using “Props” in ReactJS
<div id="hello"></div>
• <script type="text/babel">
• var Hello = React.createClass({ // deprecated in 0.14.3
• render: function () {
• var name = this.props.name;
•
• return ( <h2>Hello {name}</h2> );
• }
• });
• ReactDOM.render(<Hello name="Dave"/>,
• document.getElementById('hello'));
• </script>
12. Property Types in ReactJS
propTypes contains properties and their types:
propTypes: {
width: React.PropTypes.number,
height: React.PropTypes.number
//other1: React.PropTypes.string,
//other2: React.PropTypes.array.isRequired,
},
13. Property Types and Validation
How to throw an error if any property is negative:
propTypes: {
width: function(props, propName, componentName) {
if(props[propName] < 0) {
throw new Error(propName+" cannot be negative");
}
}
},
14. The “getDefaultProps()” Method
<div id="container"></div>
<script type="text/babel">
var Hello = React.createClass({
getDefaultProps: function () {
return { y : 456 }
},
render: function () {
return (
<h2>x = {this.props.x} y = {this.props.y} </h2>
);
}
});
ReactDOM.render(<Hello x={123}/>,
document.getElementById('container'));
</script>
16. SVG in ReactJS (part 1)
<div id="mysvg"></div>
<script type="text/babel">
class MySVG extends React.Component {
constructor () {
super();
}
// more code in the next slide…
23. Working with Lists (2b)
class ListOptions extends React.Component {
render() {
return (
<li>{this.props.value}</li>
)
}
}
ReactDOM.render( <UserList/>,
document.getElementById('container')
)
24. Sometimes we Need JavaScript Functions
• Use map() to apply a function to an array of items:
a) Returns a new array with ‘transformed’ elements
b) You specify the function
• Use filter() to return a subarray of items:
involves conditional logic (defined by you)
• Other functions: merge(), flatten(), reduce(), …
• NB: you can combine them via method chaining
25. The ‘map’ and ‘filter’ Functions
var items = [1,2,3,4,5,6,7,8,9,10,11,
12,13,14,15,16,17,18,19,20];
var even = [], double = [];
even = items.filter(function(item) {
return item % 2 == 0;
});
console.log("even = "+even);
double = items.map(function(item) {
return item * 2;
});
console.log("double = "+double);
31. ReactJS: Lifecycle methods
Consider the following scenario:
A Web page contains GSAP code to animate SVG elements
The SVG elements are dynamically generated
There is no static SVG content
Q: where do you place the GSAP code?
A: in the componentDidMount() method
32. Working with State (1a)
class MyInput extends React.Component {
constructor() {
super();
}
componentWillMount() {
this.state = {value: 'Hello There!'};
}
handleChange(event) {
this.setState({value: event.target.value});
console.log("value: "+this.state.value);
}
33. Working with State (1b)
render() {
var value = this.state.value;
return <input type="text" value={value}
onChange={this.handleChange} />;
}
}
ReactDOM.render(
<MyInput />,
document.getElementById('myinput')
);
34. Update List of Users (1)
class UserList extends React.Component {
constructor() {
super();
this.userList = ['Sara', 'Dave', 'John', 'Sally’ ];
this.addUser = this.addUser.bind(this);
}
componentDidMount() {
this.setState({user: ""});
}
addUser() {
var user = this.refs.user.value;
//console.log("user = "+user);
this.setState({user: user});
this.userList.push(user);
}
40. Retrieving Github User Data (2)
render() {
if (this.state.loading) { return <span>Loading...</span>; }
else if (this.state.error !== null) {
return <span>Error: {this.state.error.message}</span>;
}
else {
var userInfo = this.state.data;
return (
<ul>
<li>Username: {userInfo.login} </li>
<li>Followers: {userInfo.followers} </li>
<li>Following: {userInfo.following} </li>
<li>Created at: {userInfo.created_at}</li>
</ul>
)
}}}
41. Retrieving Github User Data (3)
ReactDOM.render(
<UserInfo
promise={$.getJSON('https://api.github.com/users/ocampesato')} />,
document.getElementById("userinfo")
);
42. What about React Routing?
• Routing: how to access different parts of an app
• Static routing and Dynamic routing
• http://rwhitmire.com/react-routify
• ReactRouter v4 contains major changes:
https://github.com/ReactTraining/react-
router/blob/v4/README.md#v4-faq
43. Heroku and create-react-app (1)
https://github.com/facebookincubator/
a FB endorsed and supported way to build real React apps
Zero configuration deployment to Heroku:
https://blog.heroku.com/deploying-react-with-zero-
configuration
https://github.com/mars/create-react-app-buildpack#usage
45. Higher Order Components
• Define functions that take a component as an argument
and then return a component
• https://medium.com/javascript-inside/why-the-hipsters-
recompose-everything-23ac08748198#.ojvtuun57
• Now let’s take a detour to ES6….
46. What about ES6?
• Arrow functions and let keyword
• Block scopes
• Classes and inheritance
• Default parameters
• Destructured assignment
• Generators, Iterators, Maps, and Sets
• Promises and Rest parameters
• Spread operator
• Template Literals
47. ES6 let and Arrow Functions
• let square = x => x * x;
• let add = (x, y) => x + y;
• let pi = () => 3.1415;
• console.log(square(8)); // 64
• console.log(add(5, 9)); // 14
• console.log(pi()); // 3.1415
48. ES6 Class Definition (part 1)
class Rectangle {
constructor(height, width) {
this.height = height;
this.width = width;
}
calcArea() {
return this.height * this.width;
}
}
• var r1 = new Rectangle(5,10);
• var r2 = new Rectangle(25,15);
49. ES6 Class Definition (part 2)
• console.log("r1 area = "+r1.calcArea());
• console.log("r2 area = "+r2.calcArea());
• Test this code here: http://babeljs.io/repl/
• More Examples:
https://developer.mozilla.org/en-
US/docs/Web/JavaScript/Reference/Classes
50. Browser Status for ES6
• Modern IE: https://goo.gl/56n7IL
• Mozilla: https://goo.gl/iSNDf9
• Chrome: https://www.chromestatus.com/features#ES6
51. Other Useful ES6 Links
https://github.com/lukehoban/es6features
http://kangax.github.io/compat-table/es6/
https://dev.modern.ie/platform/status/?filter=f3f0000bf&search=es6
https://developer.mozilla.org/en-
US/docs/Web/JavaScript/New_in_JavaScript/ECMAScript_6_support_i
n_Mozilla
https://medium.com/@bojzi/overview-of-the-javascript-ecosystem-
8ec4a0b7a7be
Next we’ll discuss application state….
52. Application State can be Complicated
• Suppose a ReactJS has many components
• What if state is required in multiple components?
• Where is state maintained?
• resembles a C++ class hierarchy a “thick” base class allows for
easy access, but some things don’t belong in the base class
• One solution: store state outside the app (Redux)
53. ReactJS + Flux (Facebook)
• Flux is a pattern (Facebook)
• unidirectional data flow
• Many implementations of Flux are available
• Redux is an implementation of Flux . . .
54. ReactJS + Redux (Facebook)
• Redux is an implementation of Flux
• the most popular implementation (at least 15 others)
• Mobx (simpler alternative) and Alt
• “advanced state management”
• Actions, Dispatcher, reducer, and Store(s)
• Reductor: Redux for Android
55. ReactJS + Redux (Facebook)
• How Redux works:
• Create a Redux store
• Dispatcher passes Action and Store to Reducer
• Reducer updates the Store
• View is notified and updated accordingly
56. Redux versus Mobx
• Redux: influenced by functional programming
• Mobx: influenced by OOP and Reactive Programming
• More detailed comparison of Redux and Mobx:
1) http://www.robinwieruch.de/redux-mobx-confusion
2)https://medium.com/@sanketsahu/if-not-redux-then-
what-fc433234f5b4#.38tus3hai
3) http://blog.bandwidth.com/using-react-js-for-front-end-
development
57. ReactJS + GraphQL (Facebook)
• GraphQL: a server-side schema for graph-oriented data
• Can “wrap” NoSQL and relational stores
• GraphQL server processes data requests from clients
• Data is returned to client apps
• http://githubengineering.com/the-github-graphql-api/
• NB: GraphQL does not need Relay (but Relay needs GraphQL)
58. GraphQL versus REST
• GraphQL is a “finer-grained” alternative to REST
• REST is all-or-nothing: an “entity” is returned
• GraphQL returns a subset of elements of an “entity”
• Falcor from Netflix: GraphQL alternative (without a schema)
59. GraphQL: What it isn’t
• GQL does not dictate a server language
• GQL does not dictate a storage/back-end
• GQL is a query language without a database
60. GraphQL: What Does it Do?
• It exposes a single endpoint
• the endpoint parses and executes a query
• The query executes over a type system
• the type system is defined in the application server
• the type system is available via introspection (a GQL API)
61. GraphQL Server Structure
GraphQL servers have three components:
• 1) GraphQL “core” (JavaScript and other languages)
• 2) Type Definitions (maps app code to internal system)
• 3) Application code (business logic)
62. GraphQL Core: Five Components
• 1) Frontend lexer/parser: an AST [Relay uses parser]
• 2) Type System: GraphQLObjectType (a class)
• 3) Introspection: for querying types
• 4) Validation: is a query valid in the app’s schema?
• 5) Execution: manage query execution (via the AST)
63. The GraphiQL IDE
• https://github.com/skevy/graphiql-
app/blob/master/README.md
• https://github.com/skevy/graphiql-app/releases
• OSX: brew cask install graphiql
66. GraphQL Queries
• query EmpNameQuery {
• emp {
• fname
• lname
• }
• }
• The result of the preceding query is here:
• {
• "data": [{
• "emp": {
• "fname": "John",
• "lname": "Smith"
• }
• }]
• }
67. GraphQL Websites
• Apollo: http://www.apollostack.com/
“consolidates” data (removes duplicates in a tree)
• Reindex: https://www.reindex.io/blog/redux-and-
relay
• Scaphold: scaphold.io
• Upcoming SF conference: http://graphqlsummit.com/
68. GraphQL Websites
• Apollo: http://www.apollostack.com/
“consolidates” data (removes duplicates in a tree)
• Reindex: https://www.reindex.io/blog/redux-and-relay
• Scaphold: https://scaphold.io/#/
• GraphiQL: https://github.com/skevy/graphiql-app
• GraphQL conference: http://graphqlsummit.com/
69. ReactJS + Relay (Facebook)
• Relay: a “wrapper” around client-side components
• Data requests from a component “go through” Relay
• Relay sends data requests to a GraphQL server
• Data is returned to client application
• Data is displayed according to application code/logic
71. What is React Native? (Facebook)
• Facebook toolkit for cross-platform native mobile apps
• https://facebook.github.io/react-native/
• You write custom JSX code for Android and iOS
• Update contents of index.android.js and index.ios.js
• Invoke react-native from command line
• Update cycle: Mobile app is updated via “hot reloading”
72. React Native Components
• https://github.com/react-native-community/react-native-elements
• Buttons
• Icons
• Social Icons / Buttons
• Side Menu
• Form Elements
• Search Bar
• ButtonGroup
• Checkboxes
• List Element
• Linked List Element
• Cross Platform Tab Bar
• HTML style headings (h1, h2, etc...)
• Card component
• Pricing Component
73. React Native Installation
• iOS apps: make sure you’ve installed Xcode
• Android apps: install Java/Android/NDK:
set JAVA_HOME, ANDROID_HOME, and NDK_HOME
• Now install react-native:
[sudo] npm install –g react-native
• Create an application:
react-native new FirstApp
Start an application: react-native run-android
74. More Stuff About React Native
• Top-level element in render() must be a <View> element
• You can create custom native components (Android&iOS)
• Supports Flux/Redux/Relay/GraphQL
• React Native with Redux:
https://github.com/ReactConvention/react-native-redux-
starter-kit
75. React Native IDEs/Toolkits
IDES: Deco (open source) and XDE (from Exponent)
Very good “Starter kits” (with lots of components):
ignite: https://infinite.red/ignite
nativebase: https://github.com/GeekyAnts/NativeBase
react-native ble: https://github.com/Polidea/react-native-
ble-plx
react-native-bg-geo:
https://github.com/transistorsoft/react-native-background-
geolocation
77. Some Useful Tools/IDEs
• Select an IDE:
+WebStorm 10: free 30-day trial ($49/year)
+Visual Studio Code (free)
+ Atom (free) with atom-TypeScript extension
• Command Line Tools:
+ npm, npmjs, gulp, grunt (older), broccoli,
+ webpack, browserify (older), jspm+systemjs
https://github.com/addyosmani/es6-tools
78. Useful Technologies to Learn
• Main features of ES6 (and methods in ECMA5)
• Sass/Bootstrap 4 (previously: less)
• https://react-bootstrap.github.io/
• D3.js for Data Visualization
• React Native (=ReactJS for Native Mobile)
• https://egghead.io/react-redux-cheatsheets
79. Recent/Upcoming Books and Training
1) HTML5 Canvas and CSS3 Graphics (2013)
2) jQuery, CSS3, and HTML5 for Mobile (2013)
3) HTML5 Pocket Primer (2013)
4) jQuery Pocket Primer (2013)
5) HTML5 Mobile Pocket Primer (2014)
6) D3 Pocket Primer (2015)
7) Python Pocket Primer (2015)
8) SVG Pocket Primer (2016)
9) CSS3 Pocket Primer (2016)
10) Angular 2 Pocket Primer (2017)