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In this talk, I'm presenting an alternative approach to thinking about UI and navigation on iOS - one that is declarative and that I find easy to reason about in a big application. I did live coding and the link is on the last slide. Enjoy!
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But there are places where object oriented is just not enough. There are features that cut across the entire system such as security, logging and transaction handling which are hard to implement efficiently using the OO paradigm.
Aspect Oriented Programming (AOP) helps us deal with these application-wide concerns by adding a high level of reuse to the traditional OOP framework.
In this session I'll explain what AOP is all about and how it can be implemented in .NET using simple methods and industrial grade frameworks to improve the developer's everyday work by using aspects.
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
Mike Bartlett and Andrew Newdigate, founders of Gitter, discuss lessons learned building and scaling a realtime web application with the Marionette NY Community.
Have you ever thought how is it to work with ReactJS for a long time? I do. The talk is taking you through the life of the stack at HolidayCheck, lessons learned and other experiences.
In this talk, I'm presenting an alternative approach to thinking about UI and navigation on iOS - one that is declarative and that I find easy to reason about in a big application. I did live coding and the link is on the last slide. Enjoy!
Every software developer knows object oriented programming; in fact most use it every day. Using OOP enables code reuse and creates readable and maintainable code.
But there are places where object oriented is just not enough. There are features that cut across the entire system such as security, logging and transaction handling which are hard to implement efficiently using the OO paradigm.
Aspect Oriented Programming (AOP) helps us deal with these application-wide concerns by adding a high level of reuse to the traditional OOP framework.
In this session I'll explain what AOP is all about and how it can be implemented in .NET using simple methods and industrial grade frameworks to improve the developer's everyday work by using aspects.
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
Mike Bartlett and Andrew Newdigate, founders of Gitter, discuss lessons learned building and scaling a realtime web application with the Marionette NY Community.
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The ReactOS project is rapidly developing. One of the developers participating in this project suggested that we re-analyzed the source code, as the code base is growing fast. We were glad to do that. We like this project, and we'll be happy if this article helps the developers to eliminate some bugs. Analysis was performed with the PVS-Studio 5.02 code analyzer.
Checking the code of Valgrind dynamic analyzer by a static analyzerPVS-Studio
This statement would be incorrect, as well as the reverse idea. The tools of static and dynamic analysis complement each other, they do not compete with each other. Both of these methods have strengths and weaknesses. Some errors cannot be detected by dynamic analyzers, some - by static ones. That's why I suggest treating this post as another demonstration of the abilities of PVS-Studio, not the comparison of two methodologies.
Since these presentations were spare time hobby - I've decided to share them :)
Hopefully someone will find them useful.
This part continues 1. part with more design patterns like Command, State, NullObject.
Understanding Framework Architecture using Eclipseanshunjain
Talk on Framework architectures given at SAP Labs India for Eclipse Day India 2011 - Code attached Here: https://sites.google.com/site/anshunjain/eclipse-presentations
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Since React is just a “view framework”, it leaves you with lots of options for how to architect the deeper parts of your stack. The best way to handle those deeper layers is by using Redux – a state container that allows you to write much of your application in the form of pure functions. Using Redux helps you write applications that are much easier to test and understand and to achieve more thorough separation between your views and your business logic. Redux also unlocks the possibility of using amazing tools.
OBJECTIVE
Introduce the audience to Redux, a state container that can be used together with React to achieve sanity deeper down in your stack.
TARGET AUDIENCE
Developers familiar with core React and looking for a better way to architect their applications.
ASSUMED AUDIENCE KNOWLEDGE
Core React knowledge is assumed. Familiarity with basic Flux concepts would help, but I’ll review those quickly.
FIVE THINGS AUDIENCE MEMBERS WILL LEARN
Why pure functions make your code easier to maintain.
How unidirectional data flows help you sleep better at night.
How Redux helps you manage state better via reducers.
How to use Redux together with React.
How to test Redux applications.
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- for many years we have utilised scroll handlers to detect when
to trigger such actions. Now modern browsers are supporting
IntersectionObserver, a new API that comes with better performance, and results in cleaner code.
In this talk I will show you what Intersection Observer is,
what type of code it replaces and why it is a better alternative.
Slides from talk given at:
- FEL in London on September 28th, 2017
- Paris.js on September 27th, 2017
- BerlinJS on September 21st, 2017
----
Snips are hiring - join us for an amazing adventure working with AI in the heart of Paris (no remote).
Currently looking for one frontend dev, as well as for many other non web roles:
https://snips.ai/jobs
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The ReactOS project is rapidly developing. One of the developers participating in this project suggested that we re-analyzed the source code, as the code base is growing fast. We were glad to do that. We like this project, and we'll be happy if this article helps the developers to eliminate some bugs. Analysis was performed with the PVS-Studio 5.02 code analyzer.
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This statement would be incorrect, as well as the reverse idea. The tools of static and dynamic analysis complement each other, they do not compete with each other. Both of these methods have strengths and weaknesses. Some errors cannot be detected by dynamic analyzers, some - by static ones. That's why I suggest treating this post as another demonstration of the abilities of PVS-Studio, not the comparison of two methodologies.
Since these presentations were spare time hobby - I've decided to share them :)
Hopefully someone will find them useful.
This part continues 1. part with more design patterns like Command, State, NullObject.
Understanding Framework Architecture using Eclipseanshunjain
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It also demonstrates refactorings that you could apply straight away to make your code better.
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Since React is just a “view framework”, it leaves you with lots of options for how to architect the deeper parts of your stack. The best way to handle those deeper layers is by using Redux – a state container that allows you to write much of your application in the form of pure functions. Using Redux helps you write applications that are much easier to test and understand and to achieve more thorough separation between your views and your business logic. Redux also unlocks the possibility of using amazing tools.
OBJECTIVE
Introduce the audience to Redux, a state container that can be used together with React to achieve sanity deeper down in your stack.
TARGET AUDIENCE
Developers familiar with core React and looking for a better way to architect their applications.
ASSUMED AUDIENCE KNOWLEDGE
Core React knowledge is assumed. Familiarity with basic Flux concepts would help, but I’ll review those quickly.
FIVE THINGS AUDIENCE MEMBERS WILL LEARN
Why pure functions make your code easier to maintain.
How unidirectional data flows help you sleep better at night.
How Redux helps you manage state better via reducers.
How to use Redux together with React.
How to test Redux applications.
Lazy loading content, tracking impressions, animation triggers
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to trigger such actions. Now modern browsers are supporting
IntersectionObserver, a new API that comes with better performance, and results in cleaner code.
In this talk I will show you what Intersection Observer is,
what type of code it replaces and why it is a better alternative.
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How to dispatch redux action with timeout
1.
2. How To Dispatch A Redux Action With A Timeout?
Do you want to dispatch a redux action with a timeout? If yes, then this
onsite blog can give you a better chance to make it possible. Generally,
you should never get into the trap of thinking that a library can
prescribe you everything.
If you are new into this topic, don’t worry! we have uploaded
a beginner’s friendly guide on redux. Check this out.
When you want to do something with the JavaScript timeout, then sure
you have to use setTimeout. Here there is no special reason why redux
actions are different from others. When you want to dispatch a redux
action with a timeout, you can get help from React professionals and
acquire React js development services for your projects.
3. • Redux can provide the most effective alternative ways to deal with
the asynchronous stuff. But you have to use them after realising that
you are repeating the code too much. When you are facing this
problem, then you have to use what your entire language offers.
Finally, you can get the simplest solution.
• See the code Snippet below:
4. Writing Async Code Inline:
It is the simplest process and there is nothing specific to the redux here
store.dispatch({ type: 'SHOW_NOTIFICATION', text: 'You logged in.' })
setTimeout(() => {
store.dispatch({ type: 'HIDE_NOTIFICATION' })
}, 5000)
Similarly, from around the connected component:
this.props.dispatch({ type: 'SHOW_NOTIFICATION', text: 'You logged in.' })
setTimeout(() => {
this.props.dispatch({ type: 'HIDE_NOTIFICATION' })
}, 5000)
5. • The major difference is that, here in this connected component, you
don’t need to access the store itself. But either you can get dispatch()
or particular action creators that are injected as props. You will never
get any difference from here.
• When you don’t like making types while dispatching the same actions
from various components, then you have to extract the action
creators. Instead, you can dispatch the action objects to inline
effectively:
6. // actions.js
export function showNotification(text) {
return { type: 'SHOW_NOTIFICATION', text }
}
export function hideNotification() {
return { type: 'HIDE_NOTIFICATION' }
}
// component.js
import { showNotification, hideNotification } from '../actions'
this.props.dispatch(showNotification('You just logged in.'))
setTimeout(() => {
this.props.dispatch(hideNotification())
}, 5000)
7. • Or, in case you have bound them previously with connect():
this.props.showNotification('You just logged in.')
setTimeout(() => {
this.props.hideNotification()
}, 5000)
Till now there is no middleware or other advanced concept that has
been used.
8. Extraction of Async Action Creator:
• Even the above-mentioned approach is very simple, but you may face some
serious problems:
• It may force you to duplicate the logic anywhere you want for showing the
notification.
Such notifications will never have any IDs. Therefore there you will have the
race condition when you show two essential notifications very fast. If the
first time out is completed, then it will dispatch the HIDE_NOTIFICATION.
Along with that, it will hide the second notification very fast after the
timeout.
For solving these problems, you have to extract the function that integrates
the timeout logic and dispatch major actions. It may look like this:
9. // actions.js
functionshowNotification(id, text) {
return { type: 'SHOW_NOTIFICATION', id, text }
}
functionhideNotification(id) {
return { type: 'HIDE_NOTIFICATION', id }
}
letnextNotificationId = 0
export function showNotificationWithTimeout(dispatch, text) {
// Assigning IDs to notifications lets reducer ignore HIDE_NOTIFICATION
// for the notification that is not currently visible.
// Alternatively, we could store the timeout ID and call
// clearTimeout(), but we’d still want to do it in a single place.
const id = nextNotificationId++
dispatch(showNotification(id, text))
setTimeout(() => {
dispatch(hideNotification(id))
}, 5000)
}
10. • During this time, components make use of
showNotificationWithTimeout without duplicating any logic or having
race conditions with various notifications:
// component.js
showNotificationWithTimeout(this.props.dispatch, 'You just logged in.')
// otherComponent.js
showNotificationWithTimeout(this.props.dispatch, 'You just logged out.')
Now showNotificationWithTimeout() needs to accept the dispatch as
the first argument. It is mainly since; it must have to dispatch the
actions to the store. A component is able to access dispatch but an
external function is needed to take complete control over dispatching.
Finally, it is best to give control over the dispatching.
When you are having the singleton store exported from a certain
module, then instead you have to import it and then directly dispatch:
11. // store.js
export default createStore(reducer)
// actions.js
import store from './store'
// ...
letnextNotificationId = 0
export function showNotificationWithTimeout(text) {
const id = nextNotificationId++
store.dispatch(showNotification(id, text))
setTimeout(() => {
store.dispatch(hideNotification(id))
}, 5000)
}
// component.js
showNotificationWithTimeout('You just logged in.')
// otherComponent.js
showNotificationWithTimeout('You just logged out.')
12. • It will force the store to be the singleton. It can become very hard to
implement the server rendering.
• You must need each request to access its own store on the server.
• Therefore different users can get different preloaded data. Here a
singleton store can make the testing process very hard. You were
never able to mock the store anymore while testing the action
creators. It is because; they refer to a certain real store that is
exported from a certain module. You could never reset that state
from outside.
• Therefore when you technically are able to export the singleton store
from the module, then experts strictly oppose it. You should never do
it unless you ensure that your app won’t add any server rendering.
13. Now you have to get back to the previous version:
<// actions.js
// ...
letnextNotificationId = 0
export function showNotificationWithTimeout(dispatch, text) {
const id = nextNotificationId++
dispatch(showNotification(id, text))
setTimeout(() => {
dispatch(hideNotification(id))
}, 5000)
}
// component.js
showNotificationWithTimeout(this.props.dispatch, 'You just logged in.')
// otherComponent.js
showNotificationWithTimeout(this.props.dispatch, 'You just logged out.')
14. • It can solve certain problems with logic duplication and save a lot
from race conditions.
Thunk middleware:
The approach should be sufficient for simple apps. When you are
happy, then don’t worry about the middleware. You may get
certain inconveniences in larger apps.
Redux thunk can teach redux to explore special actions.
15. import { createStore, applyMiddleware } from 'redux'
import thunk from 'redux-thunk'
const store = createStore(
reducer,
applyMiddleware(thunk)
)
// It still recognizes plain object actions
store.dispatch({ type: 'INCREMENT' })
// But with thunk middleware, it also recognizes functions
store.dispatch(function (dispatch) {
// ... which themselves may dispatch many times
dispatch({ type: 'INCREMENT' })
dispatch({ type: 'INCREMENT' })
dispatch({ type: 'INCREMENT' })
setTimeout(() => {
// ... even asynchronously!
dispatch({ type: 'DECREMENT' })
}, 1000)
})
16. Conclusion:
• From the above-mentioned scenario, now you have found out the
procedure to dispatch a redux action with a timeout. Therefore hire
react js development services to dispatch a redux action with a
timeout. Get help from a group of professional experts.
• Stuck in your development problems or need professionals to resolve
your problems? Hire Mobile App Development Agency for software
development solutions.
• Content Source: https://bosctechlabs.com/dispatch-a-redux-action-
with-timeout/