State management in React applications using Redux.
1. Intro to redux
2. Build a redux app without any UI
3. React-Redux app using connect
4. state vs props
5. Live coding a todo app using react and redux
6. reselect
7. react prop types validation
8. Learn and understand react redux
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
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
When developing applications we have a hard time managing application state, and that is okay because managing application state is hard. We will try to make it easier using Redux.
Redux is predictable state management container for JavaScript applications that helps us manage our state while also making our state mutations predictable.
Through the presentation and code, I will show you how I solved my state problem with Redux in React application.
State is managed within the component in which variables declared in function body. State can be changed. State can be accessed using “useState” Hook in functional components and “this.state” in class components. Hook is a new feature in react. To use this expression it’s essential to have good understanding of class components. State hold information that used for UI by browser.
https://www.ducatindia.com/javatraining/
Learn how to develop front-end JavaScript web applications using React and Redux for the application architecture. Immutability and one-way data binding at it's finest. Focus on components and state management without all the hassle.
Code examples available here: https://github.com/kinabalu/mysticpaste_react_example
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.
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.
An Introduction to ReactJS, A JS Library for building user interfaces developed by Facebook Team, also this presentation introduce what is the ReduxJS Library and how we can use it with ReactJS.
React JS; all concepts. Contains React Features, JSX, functional & Class comp...Karmanjay Verma
This ppt contains all concepts of React JS. This contains React Features JSX, functional & Class component, Hooks. PPT includes sample code also for each defination in comment.
For more detail and source code
https://github.com/KPCodeLearning/React-Learning-App
https://kpcodelearning.github.io/React-Learning-App/
https://www.linkedin.com/in/karmanjayverma/
When developing applications we have a hard time managing application state, and that is okay because managing application state is hard. We will try to make it easier using Redux.
Redux is predictable state management container for JavaScript applications that helps us manage our state while also making our state mutations predictable.
Through the presentation and code, I will show you how I solved my state problem with Redux in React application.
State is managed within the component in which variables declared in function body. State can be changed. State can be accessed using “useState” Hook in functional components and “this.state” in class components. Hook is a new feature in react. To use this expression it’s essential to have good understanding of class components. State hold information that used for UI by browser.
https://www.ducatindia.com/javatraining/
Learn how to develop front-end JavaScript web applications using React and Redux for the application architecture. Immutability and one-way data binding at it's finest. Focus on components and state management without all the hassle.
Code examples available here: https://github.com/kinabalu/mysticpaste_react_example
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.
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.
An Introduction to ReactJS, A JS Library for building user interfaces developed by Facebook Team, also this presentation introduce what is the ReduxJS Library and how we can use it with ReactJS.
React JS; all concepts. Contains React Features, JSX, functional & Class comp...Karmanjay Verma
This ppt contains all concepts of React JS. This contains React Features JSX, functional & Class component, Hooks. PPT includes sample code also for each defination in comment.
For more detail and source code
https://github.com/KPCodeLearning/React-Learning-App
https://kpcodelearning.github.io/React-Learning-App/
https://www.linkedin.com/in/karmanjayverma/
Read about Redux, a state management for any vanilla javascript framework, it works on client, server and native.
complete introduction and also a comparison with its alternative.
last but not least we have a quick review on redux middleware
Redux is a library which is used to maintain a state of the application at an application level, it reduces the complexity of managing different states of the components when the app is getting comparatively larger, it provides the privilege to maintain a state of different components efficiently.
Presentation on "An Introduction to ReactJS"Flipkart
The PowerPoint presentation titled "An Introduction to ReactJS" provides a beginner-friendly overview of ReactJS, a popular JavaScript library used for building user interfaces. This presentation aims to introduce ReactJS to individuals who may not have prior technical knowledge or experience with web development.
The presentation begins with a brief introduction to ReactJS, explaining that it is a JavaScript library created by Facebook for building interactive and dynamic user interfaces. It highlights ReactJS's key features, such as component-based architecture and virtual DOM.
Next, the presentation focuses on the benefits of using ReactJS. It explains that ReactJS enhances the user experience by enabling the creation of highly responsive and efficient web applications. It emphasizes React's ability to manage complex UI components and handle data updates seamlessly.
To make the concept more relatable, the presentation provides real-world examples of popular websites and applications that use ReactJS. This helps the audience understand how ReactJS is implemented in real-world scenarios and its impact on user interface development.
Furthermore, the presentation covers the basic concepts of ReactJS, such as components, props, and state. It explains that ReactJS follows a modular approach, where the UI is divided into reusable components, making it easier to manage and update the application. It also gives a high-level overview of how props and state are used to manage data flow within React components.
Throughout the presentation, visual aids such as diagrams, screenshots, and simple illustrations are used to enhance understanding and engage the audience. The focus is on simplifying complex concepts and making them accessible to non-technical individuals.
Finally, the presentation concludes by highlighting the vast community support and resources available for learning ReactJS. It encourages the audience to explore further and provides recommendations for online tutorials, documentation, and learning platforms.
Overall, the "An Introduction to ReactJS" PowerPoint presentation aims to provide a non-technical audience with a basic understanding of ReactJS, its benefits, and its relevance in modern web development.
The speed of innovation in the JavaScript world is insane: in a few months libraries, frameworks and tools can go from little experiments to something being used by millions of people. In this talk the attention will be focused on React, a library made by Facebook, and on the state of art of the state and data management (Redux/Mobx), testing (Enzyme), modules and syntax (Webpack/Babel) and style (CSS Modules).
Outline:
- React (Main concepts, Props, State, Component Lifecycles, Mixins, ES6 Syntax, Stateless Functional Components, High Order Components, Routing)
- State Management (Redux, Mobx)
- Testing (Enzyme)
- Webpack
- CSS Modules
At Lia Infraservice we create Dynamic Websites. Become a front-end React JS developer and be a part of our tech-savvy Web App Development Company in Chennai.
React and its component structure
● What are Hooks?
● React Hooks and their capabilities
● Migrating Your Existing Apps to React Hooks
● Combine Existing React Hooks into New Custom Hooks
● Benefits of using React Hooks
● Best Practices
State of ICS and IoT Cyber Threat Landscape Report 2024 previewPrayukth K V
The IoT and OT threat landscape report has been prepared by the Threat Research Team at Sectrio using data from Sectrio, cyber threat intelligence farming facilities spread across over 85 cities around the world. In addition, Sectrio also runs AI-based advanced threat and payload engagement facilities that serve as sinks to attract and engage sophisticated threat actors, and newer malware including new variants and latent threats that are at an earlier stage of development.
The latest edition of the OT/ICS and IoT security Threat Landscape Report 2024 also covers:
State of global ICS asset and network exposure
Sectoral targets and attacks as well as the cost of ransom
Global APT activity, AI usage, actor and tactic profiles, and implications
Rise in volumes of AI-powered cyberattacks
Major cyber events in 2024
Malware and malicious payload trends
Cyberattack types and targets
Vulnerability exploit attempts on CVEs
Attacks on counties – USA
Expansion of bot farms – how, where, and why
In-depth analysis of the cyber threat landscape across North America, South America, Europe, APAC, and the Middle East
Why are attacks on smart factories rising?
Cyber risk predictions
Axis of attacks – Europe
Systemic attacks in the Middle East
Download the full report from here:
https://sectrio.com/resources/ot-threat-landscape-reports/sectrio-releases-ot-ics-and-iot-security-threat-landscape-report-2024/
DevOps and Testing slides at DASA ConnectKari Kakkonen
My and Rik Marselis slides at 30.5.2024 DASA Connect conference. We discuss about what is testing, then what is agile testing and finally what is Testing in DevOps. Finally we had lovely workshop with the participants trying to find out different ways to think about quality and testing in different parts of the DevOps infinity loop.
The Art of the Pitch: WordPress Relationships and SalesLaura Byrne
Clients don’t know what they don’t know. What web solutions are right for them? How does WordPress come into the picture? How do you make sure you understand scope and timeline? What do you do if sometime changes?
All these questions and more will be explored as we talk about matching clients’ needs with what your agency offers without pulling teeth or pulling your hair out. Practical tips, and strategies for successful relationship building that leads to closing the deal.
SAP Sapphire 2024 - ASUG301 building better apps with SAP Fiori.pdfPeter Spielvogel
Building better applications for business users with SAP Fiori.
• What is SAP Fiori and why it matters to you
• How a better user experience drives measurable business benefits
• How to get started with SAP Fiori today
• How SAP Fiori elements accelerates application development
• How SAP Build Code includes SAP Fiori tools and other generative artificial intelligence capabilities
• How SAP Fiori paves the way for using AI in SAP apps
Welocme to ViralQR, your best QR code generator.ViralQR
Welcome to ViralQR, your best QR code generator available on the market!
At ViralQR, we design static and dynamic QR codes. Our mission is to make business operations easier and customer engagement more powerful through the use of QR technology. Be it a small-scale business or a huge enterprise, our easy-to-use platform provides multiple choices that can be tailored according to your company's branding and marketing strategies.
Our Vision
We are here to make the process of creating QR codes easy and smooth, thus enhancing customer interaction and making business more fluid. We very strongly believe in the ability of QR codes to change the world for businesses in their interaction with customers and are set on making that technology accessible and usable far and wide.
Our Achievements
Ever since its inception, we have successfully served many clients by offering QR codes in their marketing, service delivery, and collection of feedback across various industries. Our platform has been recognized for its ease of use and amazing features, which helped a business to make QR codes.
Our Services
At ViralQR, here is a comprehensive suite of services that caters to your very needs:
Static QR Codes: Create free static QR codes. These QR codes are able to store significant information such as URLs, vCards, plain text, emails and SMS, Wi-Fi credentials, and Bitcoin addresses.
Dynamic QR codes: These also have all the advanced features but are subscription-based. They can directly link to PDF files, images, micro-landing pages, social accounts, review forms, business pages, and applications. In addition, they can be branded with CTAs, frames, patterns, colors, and logos to enhance your branding.
Pricing and Packages
Additionally, there is a 14-day free offer to ViralQR, which is an exceptional opportunity for new users to take a feel of this platform. One can easily subscribe from there and experience the full dynamic of using QR codes. The subscription plans are not only meant for business; they are priced very flexibly so that literally every business could afford to benefit from our service.
Why choose us?
ViralQR will provide services for marketing, advertising, catering, retail, and the like. The QR codes can be posted on fliers, packaging, merchandise, and banners, as well as to substitute for cash and cards in a restaurant or coffee shop. With QR codes integrated into your business, improve customer engagement and streamline operations.
Comprehensive Analytics
Subscribers of ViralQR receive detailed analytics and tracking tools in light of having a view of the core values of QR code performance. Our analytics dashboard shows aggregate views and unique views, as well as detailed information about each impression, including time, device, browser, and estimated location by city and country.
So, thank you for choosing ViralQR; we have an offer of nothing but the best in terms of QR code services to meet business diversity!
Elevating Tactical DDD Patterns Through Object CalisthenicsDorra BARTAGUIZ
After immersing yourself in the blue book and its red counterpart, attending DDD-focused conferences, and applying tactical patterns, you're left with a crucial question: How do I ensure my design is effective? Tactical patterns within Domain-Driven Design (DDD) serve as guiding principles for creating clear and manageable domain models. However, achieving success with these patterns requires additional guidance. Interestingly, we've observed that a set of constraints initially designed for training purposes remarkably aligns with effective pattern implementation, offering a more ‘mechanical’ approach. Let's explore together how Object Calisthenics can elevate the design of your tactical DDD patterns, offering concrete help for those venturing into DDD for the first time!
A tale of scale & speed: How the US Navy is enabling software delivery from l...sonjaschweigert1
Rapid and secure feature delivery is a goal across every application team and every branch of the DoD. The Navy’s DevSecOps platform, Party Barge, has achieved:
- Reduction in onboarding time from 5 weeks to 1 day
- Improved developer experience and productivity through actionable findings and reduction of false positives
- Maintenance of superior security standards and inherent policy enforcement with Authorization to Operate (ATO)
Development teams can ship efficiently and ensure applications are cyber ready for Navy Authorizing Officials (AOs). In this webinar, Sigma Defense and Anchore will give attendees a look behind the scenes and demo secure pipeline automation and security artifacts that speed up application ATO and time to production.
We will cover:
- How to remove silos in DevSecOps
- How to build efficient development pipeline roles and component templates
- How to deliver security artifacts that matter for ATO’s (SBOMs, vulnerability reports, and policy evidence)
- How to streamline operations with automated policy checks on container images
Observability Concepts EVERY Developer Should Know -- DeveloperWeek Europe.pdfPaige Cruz
Monitoring and observability aren’t traditionally found in software curriculums and many of us cobble this knowledge together from whatever vendor or ecosystem we were first introduced to and whatever is a part of your current company’s observability stack.
While the dev and ops silo continues to crumble….many organizations still relegate monitoring & observability as the purview of ops, infra and SRE teams. This is a mistake - achieving a highly observable system requires collaboration up and down the stack.
I, a former op, would like to extend an invitation to all application developers to join the observability party will share these foundational concepts to build on:
UiPath Test Automation using UiPath Test Suite series, part 3DianaGray10
Welcome to UiPath Test Automation using UiPath Test Suite series part 3. In this session, we will cover desktop automation along with UI automation.
Topics covered:
UI automation Introduction,
UI automation Sample
Desktop automation flow
Pradeep Chinnala, Senior Consultant Automation Developer @WonderBotz and UiPath MVP
Deepak Rai, Automation Practice Lead, Boundaryless Group and UiPath MVP
Key Trends Shaping the Future of Infrastructure.pdfCheryl Hung
Keynote at DIGIT West Expo, Glasgow on 29 May 2024.
Cheryl Hung, ochery.com
Sr Director, Infrastructure Ecosystem, Arm.
The key trends across hardware, cloud and open-source; exploring how these areas are likely to mature and develop over the short and long-term, and then considering how organisations can position themselves to adapt and thrive.
GraphRAG is All You need? LLM & Knowledge GraphGuy Korland
Guy Korland, CEO and Co-founder of FalkorDB, will review two articles on the integration of language models with knowledge graphs.
1. Unifying Large Language Models and Knowledge Graphs: A Roadmap.
https://arxiv.org/abs/2306.08302
2. Microsoft Research's GraphRAG paper and a review paper on various uses of knowledge graphs:
https://www.microsoft.com/en-us/research/blog/graphrag-unlocking-llm-discovery-on-narrative-private-data/
Builder.ai Founder Sachin Dev Duggal's Strategic Approach to Create an Innova...Ramesh Iyer
In today's fast-changing business world, Companies that adapt and embrace new ideas often need help to keep up with the competition. However, fostering a culture of innovation takes much work. It takes vision, leadership and willingness to take risks in the right proportion. Sachin Dev Duggal, co-founder of Builder.ai, has perfected the art of this balance, creating a company culture where creativity and growth are nurtured at each stage.
2. Agenda
1. Local state vs Global state
2. Redux Architecture
3. Redux demo code (Todo console example)
a. createStore(reducer, [preloadedState], [enhancer])
b. store.subscribe(callback)
c. combineReducers({reducerKey: reducerValue, …})
4. React with Redux code example
a. react-redux
b. Provider component
c. Connect, mapStateToProps, mapDispatchToProps, Actions, reducers etc.
5. Selectors for computed state
a. reselect library for memoization of computed state
3. React State vs Redux State
Local state (React)
1. Good for small application where there is not a lot of components, easier to write as it is inline.
2. In complex applications, local state is preferably used for short term states which changes rapidly
and atomically and follows these conditions
a. Other part of the application does not need that piece of state.
b. We are not serializing the state as it is very minor UI level state like temporary textbox data. Applied filters
to drop down menu or tables.
c. If you want the application to resume with all these minute details then do not use inline component states.
3. Difficulties in sharing state between unrelated components.
4. There is no single source of truth.
5. Difficult to debug if the application components composition is complex.
6. There is no way to track changes to the state and going back to a previous state.
7. Serialization and deserialization of the local state is difficult.
4. React State vs Redux State
Global state (Redux)
1. Preferable for complex applications, as it creates a single state object for the entire application
and removes logic to manipulate state from the component classes.
2. It is easier to serialize the whole application state and resume it afterwards.
3. Redux state store is immutable so history of the store is persisted, which gives features like time
travel debugging. Also going back to previous state is easy.
4. Sharing a piece of state to different components is simple as any number of components can
subscribe to that piece of the state.
5. Concepts like selectors can be used to reuse parts of state for creating new state structure for
components if needed.
6. Components of Redux
Store:
1. Store contains the entire state of an application and manages it in an immutable fashion.
2. Store is created using createStore function provided by redux.
3. Store has utility functions like dispatch, subscribe, getState, replaceReducer etc.
Actions:
1. Action objects are plain JS objects with a type property can optionally have some payload also.
Dispatcher:
1. Dispatcher is a component of redux that dispatches a given action to all the reducers.
2. Dispatcher can be invoked by store.dispatch method.
Reducer:
1. Function that takes a state and an action, returns the modified state.
2. For every action dispatched by dispatcher, all the reducer are notified.
9. react-redux
● JS lib created by redux team to make redux easily pass state and action creators to react
components.
● react-redux components and APIs:
○ <Provider store />
■ React component that will auto subscribe to store passed to it.
○ connect(mapStateToProps, mapDispatchToProps)(TargetComponent)
■ Enhancer function that injects state and/or action creators to react components.
○ mapStateToProps(state, ownProps):
■ Injects state object as props to the target component
○ mapDispatchToProps(dispatch):
■ Injects action creator as props to the target component
○ bindActionCreators(actionCreators, dispatch):
■ Binds dispatch with action creators that are being passed to the target component
11. Selectors
● JS functions that takes the state and/or condition, returns a computed state.
● Selectors are functions that make queries on the state object and returns the result.
● Useful for functionalities like conditional filtering, extracting a part of the state obj.
● Selectors are invoked while extracting state in mapStateToProps.
● State and props can be passed to the selector.
13. Reselect
1. Selectors are useful but they are inefficient, they do the same processing repeatedly for
each related action dispatch.
2. This problem can be solved by implementing a memoization algo that remembers what
was the previous value when similar input was processed by the selector. Thus reducing
unnecessary repeated processing of the same data.
3. That is where reselect comes in, it is a memoization enabled selector lib created again by
the awesome Redux team.
4. Reselect has a cache for already processed results and when equivalent queries are fired
it returns result from the cache thus speeding up the selection process.
5. Selectors created by reselect are also chainable.
15. Redux Saga (Side effect management)
- Generator functions that listen to actions and yields new actions.
- Great for side effect management like async calls and long running computations.
- Makes react code look cleaner by moving side effects to separate file.
- 100% unit testable by mocking API responses.
E.g.
function* login(action) {
try{
const response = yield call(loginApi, action.username, action.password);
if(response.ok)
yield put(loginSuccessAction(user);
} catch (error) {
yield put(loginFailureAction(error);
}
}
// subscribe to action type
yield takeLatest(‘LOGIN_ACTION_TYPE, login);
- Redux saga provides utility functions like takeLatest, takeEvery, put, call to make async calls
easy.
- Generators are cancelable.
16. Immutable JS
- Redux reducer are pure functions and they need to modify the state passed to them, in an
immutable fashion.
- return {...state, {name: newValue}}
- But this is just destructuring at 1 level, if you have nested objects or lists there reference are still
the same.
- Immutable JS is a lib created by facebook, which helps fix these nuances of javascript. Its
also very efficient at managing data immutably.
- Supports a wide variety of data structures List, Map, OrderedMap, Set, OrderedSet etc.
- Data access and modification API is easy and consistent across data structures.
const { Map } = require('immutable');
const map1 = Map({ a: 1, b: 2, c: 3 });
const map2 = map1.set('b', 50);
map1.get('b') + " vs. " + map2.get('b'); // 2 vs. 50
- All the operations performed by the library are of immutable nature.
17. PropTypes validation (Type checking)
- Helps developers validate props passed to component in dev environment.
- This ensures proper usage of component props and gives errors in development time, if some
unparsable prop is passed and eliminates errors in production.
LoginForm.propTypes = {
username: PropTypes.string.isRequired,
Password: PropTypes.string.isRequired,
loginSubmit: PropTypes.func.isRequired,
};
- Can validate complex objects using json like schema.
UserList.propTypes = {
users: PropTypes.array.isRequired,
loginSubmit: PropTypes.func,
};
- Flow library helps in validating the entire app for prop types checking.
19. React best practices
1. Use functional components as much as possible. (It helps minimize issues caused by this
keyword)
2. Use class components only when you need life cycle methods and/or local state. (even try
libs like recompose to totally eliminate class components).
3. Try to minimize the number of container components to one container per page.
4. Don’t give unnecessary state to any component.
5. Use concepts like selectors to minimize redux state and compute states wherever
possible.
6. Use tools like flow to do static type checking.
7. Use libs like immutable js to speed up redux state processing.
8. Keep async calls separate. (just like redux saga, even if you are using thunk figure out
ways to write the API calls separately instead of bloating up actions.js).
9. Unit test everything (jest, enzyme, mocha)
20. Tools that will make your life easy
1. react-javascript editor plugins for syntax highlighting
2. eslint and react-a11y, for static code checking in react apps.
3. editor config for proper code structure across IDEs and machines.
4. Emmet for jsx, helps you write jsx quickly with auto tag closing and template spitting.
5. Flow for static type checking of component props.
6. Define snippets to quickly write frequently used boilerplate codes.
7. Absolute path resolvers (no more, import Blah from ‘../../../../../blah)
8. class ==> className conversion tools. (helps you copy html templates directly without
worrying about jsx class attribute).
21. References
Topics:
1. React vs Redux state
2. Redux , Redux Architecture
3. react-redux apis
4. Selectors and reselect
5. Redux Saga
6. Immutable JS
7. Static type checking for react components
Pro tools:
1. Absolute path imports in create-react-app
2. Emmet for JSX in vs code
3. React snippets
More React insights:
1. ReactJS - Medium
22. ● Questions ?
● Discussions…
Find the app below
1. Github repository
2. Live demo
Thank you