Clean Way to Manage Subscriptions | Angular Tips and Tricks

Observables allow us to develop very complex interactions without sacrificing code readability, but there’s one annoying thing about them, guess what ? Subscriptions, more specifically managing subscriptions. Every time you subscribe in components, you have to unsubscribe whenever component gets destroyed, otherwise you run the risk of poor performance. This can be especially annoying when building complex components, with numerous subscriptions. Here’s my personal preference when dealing with multiple subscriptions.

#angular #javascript #web-development

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Install Angular - Angular Environment Setup Process

Angular is a TypeScript based framework that works in synchronization with HTML, CSS, and JavaScript. To work with angular, domain knowledge of these 3 is required.

1. Installing Node.js and npm
2. Installing Angular CLI
3. Creating workspace
4. Deploying your First App

In this article, you will get to know about the Angular Environment setup process. After reading this article, you will be able to install, setup, create, and launch your own application in Angular. So let’s start!!!

Install Angular in Easy Steps

For Installing Angular on your Machine, there are 2 prerequisites:

• Node.js
• npm Package Manager

Node.js

First you need to have Node.js installed as Angular require current, active LTS or maintenance LTS version of Node.js

Download and Install Node.js version suitable for your machine’s operating system.

Npm Package Manager

Angular, Angular CLI and Angular applications are dependent on npm packages. By installing Node.js, you have automatically installed the npm Package manager which will be the base for installing angular in your system. To check the presence of npm client and Angular version check of npm client, run this command:

1. npm -v

Installing Angular CLI

• Open Terminal/Command Prompt
• To install Angular CLI, run the below command:

1. npm install -g @angular/cli

· After executing the command, Angular CLI will get installed within some time. You can check it using the following command

1. ng --version

Workspace Creation

Now as your Angular CLI is installed, you need to create a workspace to work upon your application. Methods for it are:

• Using CLI
• Using Visual Studio Code

1. Using CLI

To create a workspace:

• Navigate to the desired directory where you want to create your workspace using cd command in the Terminal/Command prompt
• Then in the directory write this command on your terminal and provide the name of the app which you want to create. In my case I have mentioned DataFlair:

1. Ng new YourAppName

• After running this command, it will prompt you to select from various options about the CSS and other functionalities.

• To leave everything to default, simply press the Enter or the Return key.

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ECS: Residential & Commercial Cleaning Services in London

Specializing in commercial cleaning, office cleaning, hospital & GP surgery cleaning, residential cleaning, washroom cleaning, school cleaning, Covid cleaning and sanitization, ECS Commercial Cleaning Company London has built up a large, experienced team of highly-skilled team of professionals who ensures work is delivered to highest standards, on time and on budget.

At ECS Commercial Cleaning, we provide a safe, cost-effective and efficient service that covers all your commercial cleaning needs. From residential cleaning, washroom cleaning, school cleaning to office cleaning, hospital & GP surgery cleaning, we cater it all. We have years of experience with all kinds of projects and know the best approach to save you time and money. Our professional knowledge and skills has enabled us to provide high quality cleaning solutions throughout London.

We’ve been delivering commercial cleaning services throughout London with the help of trained and experienced professionals, using only the finest equipment and cleaning solutions. Our team starts cleaning project from initial consultation through to completion on budget and schedule.

ECS Commercial Cleaning strives to keep people first, investing in their professional training and safety. We work hard to create and sustain an environment that helps us to achieve clients’ expectations through consistently excellent service and minimal downtime.

Our Services

With 10 years of market experience, a resource of professional employees and coverage throughout the London, ECS Commercial Cleaning has established itself as one of the leading commercial cleaning company, offering valuable cleaning solutions including:

• commercial cleaning
• office cleaning
• hospital & GP surgery cleaning
• residential cleaning
• washroom cleaning
• school cleaning
• covid cleaning and sanitization

Our clients are the London’s leading retail outlets, office buildings and office premises, schools, hospitals, production and industrial premises and others. Our cleaning solutions offers peace of mind to clients and most importantly ensure that workers are able to do their jobs comfortably and efficiently without compromising safety. Over the years of industry experience, we remain at the forefront of our industry due to our unparalleled customer dedication and unrivalled experience in providing safe, and cost-effective cleaning solutions.

Our Expert Team

ECS Commercial Cleaning provides you with an expert team that completes your cleaning project professionally and efficiently. No matter what cleaning service you require, our aim is to work closely with our clients in order to comprehend their needs and fulfil their specific requirements through tailored cleaning solutions.

With our eco-friendly cleaning products and a team of experienced professionals, we can provide timely cleaning solutions to our clients. Contact ECS Commercial Cleaning on 0161 5462235.

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Clean Way to Manage Subscriptions | Angular Tips and Tricks

Observables allow us to develop very complex interactions without sacrificing code readability, but there’s one annoying thing about them, guess what ? Subscriptions, more specifically managing subscriptions. Every time you subscribe in components, you have to unsubscribe whenever component gets destroyed, otherwise you run the risk of poor performance. This can be especially annoying when building complex components, with numerous subscriptions. Here’s my personal preference when dealing with multiple subscriptions.

#angular #javascript #web-development

Basics of Angular: Part-1

What is Angular? What it does? How we implement it in a project? So, here are some basics of angular to let you learn more about angular.

Angular is a Typescript-based open-source front-end web application platform. The Angular Team at Google and a community of individuals and corporations lead it. Angular lets you extend HTML’s syntax to express your apps’ components clearly. The angular resolves challenges while developing a single page and cross-platform applications. So, here the meaning of the single-page applications in angular is that the index.html file serves the app. And, the index.html file links other files to it.

We build angular applications with basic concepts which are NgModules. It provides a compilation context for components. At the beginning of an angular project, the command-line interface provides a built-in component which is the root component. But, NgModule can add a number of additional components. These can be created through a template or loaded from a router. This is what a compilation context about.

What is a Component in Angular?

Components are key features in Angular. It controls a patch of the screen called a view. A couple of components that we create on our own helps to build a whole application. In the end, the root component or the app component holds our entire application. The component has its business logic that it does to support the view inside the class. The class interacts with the view through an API of properties and methods. All the components added by us in the application are not linked to the index.html. But, they link to the app.component.html through the selectors. A component can be a component and not only a typescript class by adding a decorator @Component. Then, for further access, a class can import it. The decorator contains some metadata like selector, template, and style. Here’s an example of how a component decorator looks like:

@Component({
    selector: 'app-root',
    templateUrl: 'app.component.html',
    styleUrls: ['app.component.scss']
})

Role of App Module

Modules are the package of functionalities of our app. It gives Angular the information about which features does my app has and what feature it uses. It is an empty Typescript class, but we transform it by adding a decorator @NgModule. So, we have four properties that we set up on the object pass to @NgModule. The four properties are declarations, imports, providers, and bootstrap. All the built-in new components add up to the declarations array in @NgModule.

@NgModule({
declarations: [
  AppComponent,
],
imports: [
  BrowserModule,
  HttpClientModule,
  AppRoutingModule,
  FormsModule
],
bootstrap: [AppComponent]
})

What is Data Binding?

Data Binding is the communication between the Typescript code of the component and the template. So, we have different kinds of data binding given below:

• When there is a requirement to output data from our Typescript code in the HTML template. String interpolation handles this purpose like {{data}} in HTML file. Property Binding is also used for this purpose like [property] = “data”.
• When we want to trigger any event like clicking a button. Event Binding works while we react to user events like (event) = “expression”.
• When we can react to user events and output something at the same time. Two-way Binding is used like [(ngModel)] = “data”.

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Wondering how to upgrade your skills in the pandemic? Here's a simple way you can do it.

Corona Virus Pandemic has brought the world to a standstill.

Countries are on a major lockdown. Schools, colleges, theatres, gym, clubs, and all other public places are shut down, the country’s economy is suffering, human health is on stake, people are losing their jobs and nobody knows how worse it can get.

Since most of the places are on lockdown, and you are working from home or have enough time to nourish your skills, then you should use this time wisely! We always complain that we want some ‘time’ to learn and upgrade our knowledge but don’t get it due to our ‘busy schedules’. So, now is the time to make a ‘list of skills’ and learn and upgrade your skills at home!

And for the technology-loving people like us, Knoldus Techhub has already helped us a lot in doing it in a short span of time!

If you are still not aware of it, don’t worry as Georgia Byng has well said,

“No time is better than the present”

– Georgia Byng, a British children’s writer, illustrator, actress and film producer.

No matter if you are a developer (be it front-end or back-end) or a data scientist, tester, or a DevOps person, or, a learner who has a keen interest in technology, Knoldus Techhub has brought it all for you under one common roof.

From technologies like Scala, spark, elastic-search to angular, go, machine learning, it has a total of 20 technologies with some recently added ones i.e. DAML, test automation, snowflake, and ionic.

How to upgrade your skills?

Every technology in Tech-hub has n number of templates. Once you click on any specific technology you’ll be able to see all the templates of that technology. Since these templates are downloadable, you need to provide your email to get the template downloadable link in your mail.

These templates helps you learn the practical implementation of a topic with so much of ease. Using these templates you can learn and kick-start your development in no time.

Apart from your learning, there are some out of the box templates, that can help provide the solution to your business problem that has all the basic dependencies/ implementations already plugged in. Tech hub names these templates as xlr8rs (pronounced as accelerators).

xlr8rs make your development real fast by just adding your core business logic to the template.

If you are looking for a template that’s not available, you can also request a template may be for learning or requesting for a solution to your business problem and tech-hub will connect with you to provide you the solution. Isn’t this helpful 🙂

Confused with which technology to start with?

To keep you updated, the Knoldus tech hub provides you with the information on the most trending technology and the most downloaded templates at present. This you’ll be informed and learn the one that’s most trending.

Since we believe:

“There’s always a scope of improvement“

If you still feel like it isn’t helping you in learning and development, you can provide your feedback in the feedback section in the bottom right corner of the website.

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