How come React Native is so Native? – Quovantis – Medium

How come React Native is so Native?  #ReactJS

  • This sphere keeps the native feel intact so that it’s hard to tell whether the app is written in native language or React Native.JavaScript SphereIt contains JavaScript code that runs on the separate thread.
  • Well, let’s take a glance at how this wisely designed component works- Any user interaction/event is detected in Native Sphere and it’s straight away passed on to JavaScript sphere via bridge for processing.
  • When it’s done, it serializes the data and sends it back to native sphere via bridge for view rendering.Any pass over the bridge (call from Native to Javascript or from Javascript to Native ) brings down the performance graph.
  • As I mentioned earlier that any activity in JavaScript sphere does not hamper user experience, asynchronous calls make React Native apps highly performant.Serialization- Any communication over the bridge includes exchange of serializable messages.
  • Another sphere will have to keep waiting for the access thereby hampering its seamless code execution.Batch Processing- Under the veil, JavaScript code gets translated into native code after the pass over the bridge.

Before diving into the pool of React Native, I was curious to know how this thing really works under the hood. After all, developers can’t stand any black box and seeing through any abstraction is…
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File Upload and POST Request using ReactJS – Jeril Kuriakose – Medium

File Upload and POST Request using #ReactJS

  • File Upload and POST Request using ReactJSSource: makes life simpler.
  • I just wanted to demonstrate the working of file-upload and sending the uploaded file as a POST request.For the demonstration I used the React Boilerplate and was following the Redux architecture.
  • I will be only sharing the components that I used for file upload and POST request.
  • on’ is used to find out the progress of the file upload.
  • The value can be used for several other purposes such as progress bar, to calculate time remaining, etc.Here is the code for uploading and sending the uploaded file as a POST request.We can see the progress output in the console window:File upload and post using ReactJSYou can find the gist of the code here.Happy coding!!!

ReactJS makes life simpler. If you are already working with it, you would be knowing it. I just wanted to demonstrate the working of file-upload and sending the uploaded file as a POST request. For…
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Shoutem on React Native featuring Tomislav Tenodi & Davor Culjak

Thank you @dabit3 for inviting us as guests again on @R_N_Radio 😎  #react #reactnative

  • In terms of React Native, what sort of product offerings do you have?
  • Can you talk about your React Native School?
  • So you talk about the process of ejecting out of Shoutem?
  • Nader talks about the e-commerce and Shoutem.
  • Nader talks about building e-commerce app with Shoutem.


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All You need it’s a kid’s whiteboard, post-its and a lot of effort — Coding in a Weekend

  • So in order to get more knowledge on Javascript language, creating a end to end app, using the power of Node.js, I’ve gathered some guys to do the same with me: learn coding.these are some crazy dudesAnd the consequence was a lot of hour spent learning how to use the tools and technologies, and being able to acquire more knowledge.But, before I show you the final result, I’ll explain how I got this idea.The MotivationDublin/Ireland it’s a awesome place for you(and me) who works as a developer.
  • And also we used, a lot, the whiteboard to make the project clear:alsome design guys hereOnce the project structure was defined, we begun the learning curve.
  • Seen we are not all knowledgeable in React.js we spend some time between the old code, the reactjs documentation on Facebook, and a lot of try/cacht to make sure that everyone has learned a basic knowledge about the code structure.
  • For the project “scrum” and organization we used Github projects, was a awesome way to push our codes and make the changes traceable.And after a very productive day, we generated a good track in our repository, and we could say that we were able to generate two pages with form functionalities, waiting for integration with the database and google maps api.Day 3Firing up the databaseBecause this is just a POC, we didn’t was looking for a full finish app, but something that could use google maps api to autocomplete our fileds and be able to send this informations to firebase would be ok for us.
  • But since we weren’t doing pair programming, and this would be another learning curve, I thought it better not to practice this technique, mainly because we were only 3 dudes.Where is the code?Contribuitors!Thank you a lot guys @Igfasouza and @AndresGrams which spent this weekend with me.I think this weekend was a lot productive and a very good challenge.

I’ve never been that kind of person which learns a lot just reading and studding … I’ve been always that other kind of person, which likes to learn practicing. So in order to get more knowledge on…
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redux mapStateToProps optimization – Cvetanov Goce – Medium

redux mapStateToProps optimization  #redux #react #javascript #reactjs

  • mapStateToProps can now return a function instead of an object.Note: in advanced scenarios where you need more control over the rendering performance, mapStateToProps() can also return a function.
  • In this case, that function will be used as mapStateToProps() for a particular component instance.
  • [from the official docs]If redux receives an implementation which returns a function it performs a closure for wrapping the own props of the component and therefore bypasses the invocation of the mapStateToProps every time the component changes it’s props received from the parent component.
  • How this is done can be seen here.We can now rework our implementation of the MyBlogs component in the following way and achieve a minor performance boost.function ownProps) { // a closure for ownProps is created // this factory is not invoked everytime the component // changes it’s props return function mapStateToProps(state) { return { blogs: state.blogs.filter(blog = blog.author === ownProps.user) }; };}export default using the component’s own props inside mapStateToProps, wrap the mapStateToProps function with a mapStateToPropsFactory which will return the function itself instead of the object directly and redux will not invoke your mapStateToPropsFactory for every parent prop changes.Thanks to my mentor Oliver Lazoroski for pointing this out to me and I will share his TL;DR; remark on this:Think of it like this, if redux receives a mapStateToProps which has ownProps as second argument and it returns an object, it switches off every optimization it makes for your connected component.This was my first of many articles on medium and I hope you will find it useful.

Redux is an open source implementation (aren’t they all?) of the flux architecture suggested by Facebook as a compliant standard for working with data in large React applications. Created by Dan…
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How to show all the Users who have liked my specific Items  #angularjs #reactjs

  • I’m trying to show all the users who have liked a current user’s specific items.
  • I’m displaying all users who have liked all items (not just my specific ones which is what I want) I’ve listed below all the relevant simple code – thank you so much guys!!
  • Stack Overflow works best with JavaScript enabled
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  • I apologize for the newbie questions still relatively new to rails.

I apologize for the newbie questions still relatively new to rails. I’m trying to show all the users who have liked a current user’s specific items. With the help of the SO community and looking at different Rails guides – I’m 85% there. Currently, I’m displaying all users who have liked all items (not just my specific ones which is what I want) I’ve listed below all the relevant simple code – thank you so much guys!!
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