The document discusses React hooks and how they can be used to manage state and other features in function components without writing classes. It provides examples of how common lifecycle methods and state management in classes can be re-written using hooks like useState, useEffect, and useContext. Specifically, it walks through converting a chat component that subscribes to new messages and manages local state from a class to a function component using these React hooks.
A step towards the way you write the code in React application.In this presentation, I have given introduction about React hooks. Why we need it in our react applications and describe about the two most commonly used React Hooks API useState and useEffect. I also given the links of code snippets I added in these slides
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
A step towards the way you write the code in React application.In this presentation, I have given introduction about React hooks. Why we need it in our react applications and describe about the two most commonly used React Hooks API useState and useEffect. I also given the links of code snippets I added in these slides
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
The session will provide the knowledge about react page life cycle and how more precise actions or operations can be performed using react hooks concepts
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
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.
Around us everything goes through a cycle of taking birth, growing and at some point in time it will die.
Consider trees, any software application, yourself, a div container or UI component in a web browser, each of these takes birth, grows by getting updates and dies.
The lifecycle methods are various methods which are invoked at different phases of the lifecycle of a component.
The React component goes through the following phases
1) Initialization
2) Mounting
3) Update
4) Unmounting
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/
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.
This session will be about maintaning the store on client side with redux, And will have more details about state management addressing single source of truth concept
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
In this presentation, Prashant Sharma of Valuebound has talked about ReactJS - a JavaScript library for building user interfaces. Check out the agendas to know what is there for you.
----------------------------------------------------------
Get Socialistic
Our website: http://valuebound.com/
LinkedIn: http://bit.ly/2eKgdux
Facebook: https://www.facebook.com/valuebound/
Twitter: http://bit.ly/2gFPTi8
Why using composition in React ? What are the alternative (mixins, inheritance)? How to use composition to build your React application? What are the pros and cons?
The session will provide the knowledge about react page life cycle and how more precise actions or operations can be performed using react hooks concepts
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
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.
Around us everything goes through a cycle of taking birth, growing and at some point in time it will die.
Consider trees, any software application, yourself, a div container or UI component in a web browser, each of these takes birth, grows by getting updates and dies.
The lifecycle methods are various methods which are invoked at different phases of the lifecycle of a component.
The React component goes through the following phases
1) Initialization
2) Mounting
3) Update
4) Unmounting
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/
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.
This session will be about maintaning the store on client side with redux, And will have more details about state management addressing single source of truth concept
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
In this presentation, Prashant Sharma of Valuebound has talked about ReactJS - a JavaScript library for building user interfaces. Check out the agendas to know what is there for you.
----------------------------------------------------------
Get Socialistic
Our website: http://valuebound.com/
LinkedIn: http://bit.ly/2eKgdux
Facebook: https://www.facebook.com/valuebound/
Twitter: http://bit.ly/2gFPTi8
Why using composition in React ? What are the alternative (mixins, inheritance)? How to use composition to build your React application? What are the pros and cons?
JS Fest 2019. Glenn Reyes. With great power comes great React hooks!JSFestUA
The React team has been working hard on changing the game of writing declarative components: Hooks! With React Hooks we are now able to use the capabilities of class components in functional components. In this talk we are going to discover the Hooks API and explore some exciting patterns using them.
s React.js a library or a framework? In any case, it is a new way of working that represents a revolution in the way of building web projects. It has very particular characteristics that allow us, for instance, to render React code from the server side, or to include React components from Twig tags. During this talk we will present React.js, we will explore how to take advantage of it from PHP projects and we will give answers to practical problems such as universal (isomorphical) rendering and the generation of React.js forms from Symfony forms without duplication of efforts.
The complexity of frontend applications over the years led to the creation of more robust solutions, where data logic won’t be messed up at scale. A shift took place from the traditional services approach, in which data is tightly coupled to the Views of their Components, towards more composable and shareable solutions. Each of these solutions is what we call a "state-manager".
Goal of this presentation is the comparative analysis between different react frontend state managers such as Redux, MobX, Recoil and React-Query. State Machines will also be presented, showing a completely different perception of how state can be orchestrated. Different mental models of the aforementioned state managers along with their different technical implementations will be presented to the audience. Ultimately, the audience can use this presentation for future reference on faster deciding which state-manager fits their own projects. Before delving into the comparison there will be a description of the main data flow in the browser. Concepts like reactivity, immutability, predictability, concurrency and performance will be detected on the main flow and will act as our comparison metrics among the state-managers.
At the time of writing, React hooks are still in alpha but they can already be used and, since it takes a while to get used to them, it's better to understand them as soon as possible. In this talk we will see some use cases in which we refactor a class component into a hook-based functional component.
This is a C# project . I am expected to create as this image shows. .pdfindiaartz
This is a C# project . I am expected to create as this image shows. If the image isnot clearly
showing , it\'s the Chegg\'s system. Please , if you see it quit long, assist me with the starting and
hinting bulltes point or functions that may simplify. Thannks...
The design of the Calculator form
Operation
· To clear the contents of memory, the user clicks the MC button. To save the value that’s
currently displayed in memory, the user clicks the MS button. To recall the value that’s currently
in memory and display it in the calculator, the user clicks the MR button. And to add the value
that’s currently displayed to the value in memory, the user clicks the M+ button.
· An M is displayed in the box above the MC button whenever the memory contains a value.
· See project 12-1 for additional details.
Specifications
· Create a class named MemoryCalculator that inherits the Calculator class described in
project 12-1. The MemoryCalculator class should add properties and methods as needed to
implement the memory function.
Note:
· MemoryCalculator class design:
Method Description
MemoryStore Stores the calculator’s current value in memory.
MemoryRecall Sets the calculator’s current value to the value stored in memory.
MemoryAdd Adds the calculator’s current value to the value currently stored in
memory.
MemoryClear Clears the current memory value.
Solution
Calculator.cs
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
namespace Calculator
{
public class Calculator
{
public decimal currentValue;
private decimal operand1;
public decimal operand2;
private Operator op;
public enum Operator { Addd, Subtract, Multiply, Divide, None };
//Needed to be changed from private to public
public Calculator()
{
this.currentValue = 0;
this.operand1 = 0;
this.operand2 = 0;
this.op = Operator.None;
}
public decimal CurrentValue
{
get { return this.currentValue; }
}
public void Clear()
{
this.currentValue = 0;
this.operand1 = 0;
this.operand2 = 0;
this.op = Operator.None;
}
public void Add(decimal val)
{
this.operand1 = val;
this.currentValue = val;
this.op = Operator.Addd;
}
public void Subtract(decimal val)
{
this.operand1 = val;
this.currentValue = val;
this.op = Operator.Subtract;
}
public void Multiply(decimal val)
{
this.operand1 = val;
this.currentValue = val;
this.op = Operator.Multiply;
}
public void Divide(decimal val)
{
this.operand1 = val;
this.currentValue = val;
this.op = Operator.Divide;
}
public void Equals(decimal val)
{
operand2 = val;
switch (this.op)
{
case Operator.Addd:
currentValue = operand1 + operand2;
break;
case Operator.Subtract:
currentValue = operand1 - operand2;
break;
case Operator.Multiply:
currentValue = operand1 * operand2;
break;
case Operator.Divide:
//Try catch to prevent dividing by zero
try
{
currentValue = operand1 / operand2;
}
catch (DivideByZeroException)
{
MessageBox.Show(\"You cannot divide by zero\", \"Error!\");
}
break;
case Opera.
Higher Order Components and Render PropsNitish Phanse
Talk given at React foo Hyderabad 2018. Outlines the differences between higher order components and render props. Both being design patterns used primarily to aid reusability of components across a codebase.
React ES5 to ES6 | React ES5 vs ES6 | React Tutorial for Beginners | React on...Edureka!
( ReactJS Training - https://www.edureka.co/reactjs-redux-... )
This Edureka React tutorial on ES5 to ES6 Refactoring will help you in understanding the current syntax being used in React and what new features you can use in the upgraded version. This video helps you to learn following topics:
1. Introduction to React Components
2. Component structure in ES5
3. ES5 with pros, cons and code example
4. Benefits to ES6
5. ES6 restructuring of code example
6. Building Tic tac Toe game in React using ES6
Refactoring can either completely disrupt your project or make you go faster. This presentation will help you to avoid some pitfalls.
It also demonstrates refactorings that you could apply straight away to make your code better.
В презентации описаны лучшие практики использования библиотеки React в связке с Redux. Быстрое разворачивание SPA без настройки Webpack и Babel с помощью утилиты Create React App, Smart and Dumb, Stateful and Stateless Components, управление рендером с помощью shouldComponentUpdate, Redux модули, мемоизация и middlewares.
More useful info on our:
- website: https://clickky.biz
- blog: https://clickky.biz/blog
Sign up!
Solving trust issues at scale - AppSec CaliforniaSoluto
Microservices are social constructs: they can’t function without talking with other services. This also raises an interesting question: do we trust all of our microservices?
Not all microservices are the same: some are more sensitive - for example, services that handle personal user data or payment information. Others are user-facing and therefore riskier. We shouldn’t treat all services as equal. A robust mechanism that describes who can talk with who is required.
We have been dealing with this challenge for a while at Soluto. In this talk, I’ll share the journey we went through until we found a solution we’re happy with: a simple and declarative system that allows services to define who can access them. Any dev can request access to any service, and the service owner can review it. I’ll share how we build this solution (including all the technical details and live demos!), using open source tools like Open Policy Agent, so you can easily build something similar.
Micro-services are social beings: they can’t function without talking with other services. Every microservice has its own domain, and it usually relies on other micro-services to function properly. But this also raises an interesting question: do we trust all of our micro-services? The truth is that not all micro-services are the same: some micro-services are more sensitive - for example, services that handle user data. Others are user-facing and therefore riskier. We cannot treat all services as equal. We need a good and robust mechanism to describe who can talk with who. At Soluto, we are dealing with this challenge for a while. In this talk, I’ll share the journey we went through until we found a solution we’re happy with: a simple and declarative system that allows services to define who can access them. Any dev can request access to any service, and the service owner can review it. In talk, I’ll share how we build this solution, using open source tools like Open Policy Agent, so you can easily build something similar.
Things I wish someone had told me about Istio, Omer Levi HevroniSoluto
We at Soluto decided to give Istio a try, and started to gradually roll it out in our production environment. While doing that, we had a lot of *interesting* experiences that we weren't aware off - and we'll be happy to share it with you so you can learn from our experience. In the talk, I'll cover issues like high availability, reliability and monitoring - and also production issues we encounter. We do hope that until the meetup we can say that we have istio deployed in production :)
Can Kubernetes Keep a Secret? - Women in AppSec WebinarSoluto
We’ve all experienced it: you’re working on a task, adding some code, and then you need to store some sensitive configuration value. It could be an API key, client secret or an encryption key ― something that’s highly sensitive and must be kept secret. And this is where things get messy. Usually, secret storage is highly coupled with how the code is deployed, and different platforms have different solutions. Kubernetes has a promise to simplify this process by using the native secret object, which, as the name implies, can be used to store secrets or sensitive configurations. Unfortunately, Kubernetes secrets are fundamentally broken, and a developer who tries to use them will definitely have some issues. But no need to worry ― there are solid alternatives for storing secrets securely on Kubernetes platform. One solution is to use Kamus, an open-source, git-ops solution, that created by Soluto, for managing secrets on Kubernetes. Kamus can encrypt a secret so it can be decrypted only by your app on runtime - and not by anyone else. The first part of this session will cover the challenges faced when using Kubernetes secrets (from a usability and security point of view). The second part will discuss some of the existing solutions (Sealed Secrets, Helm Secrets and others), their pros, and cons, and then feature Kamus: how it works, what problems it solves, how it differs from other solutions, and what threats it can help mitigate (and what threats it can’t). The talk will cover all that is required to know so you can run Kamus on your own cluster and use it for secret management. Join me for this session to learn how you can build a Kubernetes cluster than can keep a secret ― for real.
We’ve all experienced it: you’re working on a task, adding some code, and then you need to store some sensitive configuration value. It could be an API key, client secret or an encryption key ― something that’s highly sensitive and must be kept secret. And this is where things get messy. Usually, secret storage is highly coupled with how the code is deployed, and different platforms have different solutions. Kubernetes has a promise to simplify this process by using the native secret object, which, as the name implies, can be used to store secrets or sensitive configurations. Unfortunately, Kubernetes secrets are fundamentally broken, and a developer who tries to use them will definitely have some issues. But no need to worry ― there are solid alternatives for storing secrets securely on Kubernetes platform. One solution is to use Kamus, an open-source, git-ops solution, that created by Soluto, for managing secrets on Kubernetes. Kamus can encrypt a secret so it can be decrypted only by your app on runtime - and not by anyone else. The first part of this session will cover the challenges faced when using Kubernetes secrets (from a usability and security point of view). The second part will discuss some of the existing solutions (Sealed Secrets, Helm Secrets and others), their pros, and cons, and then feature Kamus: how it works, what problems it solves, how it differs from other solutions, and what threats it can help mitigate (and what threats it can’t). The talk will cover all that is required to know so you can run Kamus on your own cluster and use it for secret management. Join me for this session to learn how you can build a Kubernetes cluster than can keep a secret ― for real.
We all use monitoring - after all, we all want to ensure that our applications are working as expected. But can hackers use it to exploit our application? Join me to explore different ways to exploit application monitoring tools, and what mitigations we can use.
There are so many sophisticated ways to exploit web applications, that it’s almost impossible for a developer to write completely secure code. But we can’t accept this situation. We can’t expose our users (and our user's data) to hackers.
So what we can do? We can switch from defense to offense. We can take hacking tools, used by malicious hackers, and use them to test our web application for security issues.
In this talk, we will take a vulnerable web application, and try to find as many vulnerabilities as we can - using only automated tools. I’ll discuss the vulnerabilities we find, explain why we should care - and how we can remediate it securely. All the tools I’ll use are tools you can start using today - to scan your applications and make sure you deploy more secure applications.
We’ve all experienced it: you’re working on a task, adding some code, and then you need to store some sensitive configuration value. It could be an API key, client secret or an encryption key ― something that’s highly sensitive and must be kept secret. And this is where things get messy. Usually, secret storage is highly coupled with how the code is deployed, and different platforms have different solutions.
Kubernetes has a promise to simplify this process by using the native secret object, which, as the name implies, can be used to store secrets or sensitive configurations. Unfortunately, Kubernetes secrets are fundamentally broken, and a developer who tries to use them will definitely have some issues.
But no need to worry ― there are solid alternatives for storing secrets securely on Kubernetes platform. One solution is to use Kamus, an open-source, git-ops solution, that created by Soluto, for managing secrets on Kubernetes. Kamus can encrypt a secret so it can be decrypted only by your app on runtime - and not by anyone else.
The first part of this session will cover the challenges faced when using Kubernetes secrets (from a usability and security point of view). The second part will discuss some of the existing solutions (Sealed Secrets, Helm Secrets and others), their pros, and cons, and then feature Kamus: how it works, what problems it solves, how it differs from other solutions, and what threats it can help mitigate (and what threats it can’t).
The talk will cover all that is required to know so you can run Kamus on your own cluster and use it for secret management. Join me for this session to learn how you can build a Kubernetes cluster than can keep a secret ― for real.
Writing good code is a challenge. Writing a code that is working, maintainable and secure is very hard to achieve. This is why we need automation – to spot the issues we missed. Tools like unit tests, code coverage or security tests can help detect various issues and help us write better code. This talk will focus on security tests – what kinds of tests exist? What value they have? And most important, what tools what can use to start running these tests today?
> The talk will contain a live (and hopefully interactive) demo of the tools, to demo what issues they can detect. All the tools that I’ll discuss are free OSS software that you can start using today.
Those are slides from Dev.IL meetup talk, by Or Rosenblatt & Yshay Yaacobi from Soluto RND
https://www.meetup.com/Dev-IL/events/253252917/
-------------------------
You developed a cool java infrastructure for your team.
Your team then shifts to python, so you rewrite the utility in python.
Then the team next door asks you to do the same rewrite for their node/typescript service.
You ask for a raise and write it again in typescript.
Now your colleague reads in HackerNews about the next cool trending language in the block.
Ain’t nobody got time for that!!!
Join us to hear how the powerful combination sidecar pattern and Kubernetes can help you solve this issue by allowing different services to use the same utility, regardless of stack or language.
You will become stack-free forever!
Security Testing for Containerized ApplicationsSoluto
Everybody wants to run their code on Kubernetes these days, but it requires a radical change to your deployment process. You want to make sure you don’t create new vulnerabilities when you take this leap. What kind of security tests can you run in this pipeline to assert that this code does not contain any known vulnerabilities?
At Soluto, we started to migrate services to Kubernetes in the recent months, and we would like to share with you what we did. In this session I’m planning to cover our CI/CD pipeline, and give extra attention to the following points:
Scanning code dependencies
Scanning containers
Testing for insecure Kubernetes configurations
Securely deploy to Kubernetes cluster
Join this session to hear our story and learn about many useful tools you can start using today to deploy secure apps to your Kubernetes cluster. All the tools I’ll present are open source tools, so using them should be as simple as possible.
We all know that running security tests on a CI can gives us a lot of value. And we all know already a few good security tools that we are running or planning to run continuously to ensure our app stays secure. But integrating those tools into the CI is not a simple task. Each one of those tools has it's own API and does not always support all the features we want. For example, we might want to report the finding of each tools as TeamCity tests, or maybe we are using Jira and want to open a new issue for each finding. And what about filtering false positives? Any automated tool will produce false positive findings, but how can we filter them? In this talk I'll demo OWASP Glue - a tool that aims to ease the integration of various security tools into the CI/CD pipeline.
The talk was presented on DevSecOps meetup
Authentication without Authentication - AppSec CaliforniaSoluto
Authentication is important, but how do you authenticate when user interaction is not an option? For example, an IoT app without a user interface. We need to authenticate the app ― without any predefined credentials. But how?
Cosmetic shop management system project report.pdfKamal Acharya
Buying new cosmetic products is difficult. It can even be scary for those who have sensitive skin and are prone to skin trouble. The information needed to alleviate this problem is on the back of each product, but it's thought to interpret those ingredient lists unless you have a background in chemistry.
Instead of buying and hoping for the best, we can use data science to help us predict which products may be good fits for us. It includes various function programs to do the above mentioned tasks.
Data file handling has been effectively used in the program.
The automated cosmetic shop management system should deal with the automation of general workflow and administration process of the shop. The main processes of the system focus on customer's request where the system is able to search the most appropriate products and deliver it to the customers. It should help the employees to quickly identify the list of cosmetic product that have reached the minimum quantity and also keep a track of expired date for each cosmetic product. It should help the employees to find the rack number in which the product is placed.It is also Faster and more efficient way.
Courier management system project report.pdfKamal Acharya
It is now-a-days very important for the people to send or receive articles like imported furniture, electronic items, gifts, business goods and the like. People depend vastly on different transport systems which mostly use the manual way of receiving and delivering the articles. There is no way to track the articles till they are received and there is no way to let the customer know what happened in transit, once he booked some articles. In such a situation, we need a system which completely computerizes the cargo activities including time to time tracking of the articles sent. This need is fulfilled by Courier Management System software which is online software for the cargo management people that enables them to receive the goods from a source and send them to a required destination and track their status from time to time.
Overview of the fundamental roles in Hydropower generation and the components involved in wider Electrical Engineering.
This paper presents the design and construction of hydroelectric dams from the hydrologist’s survey of the valley before construction, all aspects and involved disciplines, fluid dynamics, structural engineering, generation and mains frequency regulation to the very transmission of power through the network in the United Kingdom.
Author: Robbie Edward Sayers
Collaborators and co editors: Charlie Sims and Connor Healey.
(C) 2024 Robbie E. Sayers
Automobile Management System Project Report.pdfKamal Acharya
The proposed project is developed to manage the automobile in the automobile dealer company. The main module in this project is login, automobile management, customer management, sales, complaints and reports. The first module is the login. The automobile showroom owner should login to the project for usage. The username and password are verified and if it is correct, next form opens. If the username and password are not correct, it shows the error message.
When a customer search for a automobile, if the automobile is available, they will be taken to a page that shows the details of the automobile including automobile name, automobile ID, quantity, price etc. “Automobile Management System” is useful for maintaining automobiles, customers effectively and hence helps for establishing good relation between customer and automobile organization. It contains various customized modules for effectively maintaining automobiles and stock information accurately and safely.
When the automobile is sold to the customer, stock will be reduced automatically. When a new purchase is made, stock will be increased automatically. While selecting automobiles for sale, the proposed software will automatically check for total number of available stock of that particular item, if the total stock of that particular item is less than 5, software will notify the user to purchase the particular item.
Also when the user tries to sale items which are not in stock, the system will prompt the user that the stock is not enough. Customers of this system can search for a automobile; can purchase a automobile easily by selecting fast. On the other hand the stock of automobiles can be maintained perfectly by the automobile shop manager overcoming the drawbacks of existing system.
Sachpazis:Terzaghi Bearing Capacity Estimation in simple terms with Calculati...Dr.Costas Sachpazis
Terzaghi's soil bearing capacity theory, developed by Karl Terzaghi, is a fundamental principle in geotechnical engineering used to determine the bearing capacity of shallow foundations. This theory provides a method to calculate the ultimate bearing capacity of soil, which is the maximum load per unit area that the soil can support without undergoing shear failure. The Calculation HTML Code included.
Industrial Training at Shahjalal Fertilizer Company Limited (SFCL)MdTanvirMahtab2
This presentation is about the working procedure of Shahjalal Fertilizer Company Limited (SFCL). A Govt. owned Company of Bangladesh Chemical Industries Corporation under Ministry of Industries.
Quality defects in TMT Bars, Possible causes and Potential Solutions.PrashantGoswami42
Maintaining high-quality standards in the production of TMT bars is crucial for ensuring structural integrity in construction. Addressing common defects through careful monitoring, standardized processes, and advanced technology can significantly improve the quality of TMT bars. Continuous training and adherence to quality control measures will also play a pivotal role in minimizing these defects.
Event Management System Vb Net Project Report.pdfKamal Acharya
In present era, the scopes of information technology growing with a very fast .We do not see any are untouched from this industry. The scope of information technology has become wider includes: Business and industry. Household Business, Communication, Education, Entertainment, Science, Medicine, Engineering, Distance Learning, Weather Forecasting. Carrier Searching and so on.
My project named “Event Management System” is software that store and maintained all events coordinated in college. It also helpful to print related reports. My project will help to record the events coordinated by faculties with their Name, Event subject, date & details in an efficient & effective ways.
In my system we have to make a system by which a user can record all events coordinated by a particular faculty. In our proposed system some more featured are added which differs it from the existing system such as security.
8. Why classes are bad?
● Complex components become hard to understand
● Classes confuse people (notorious this..)
● Classes confuse machines (don’t minify well)
● It’s hard to reuse stateful logic between classes
28. Rules of Hooks
● Only Call Hooks at the Top Level!
○ Don’t call Hooks inside loops, conditions, or nested functions
○ Order Matters!
● Only Call Hooks from React Functions
○ Or from custom hooks
29. Under the hood
MyComponent
Memoized State Array
Hooks
Dispatcher
MyComponent
- Initial Render
useState()
useRef()
useState()
State hook
Ref hook
State hook
Slot 0
Slot 1
Slot 2
30. Under the hood
MyComponent
Memoized State Array
Hooks
Dispatcher
useState()
useRef()
useState()
State hook
Ref hook
State hook
useState()
Search on Slot 0
MyComponent
- Initial Render
MyComponent
- 2nd Render
31. Under the hood
MyComponent
Memoized State Array
Hooks
Dispatcher
useState()
useRef()
useState()
State hook
Ref hook
State hook
useState()
useRef()
useState()
Search on Slot 1MyComponent
- 2nd Render
MyComponent
- Initial Render
63. What are Custom Hooks?
● Basically functions that run hooks
● Like any other function - they can can take any args and return
whatever you want
● By convention - custom hook name start with “use”
● Like any other hook - must be called on the top level of our
components